CN204503884U - a bending machine - Google Patents

Abstract

The utility model relates to a bending machine, which comprises a first bending mechanism, wherein the first bending mechanism comprises a follower frame, a fixed shaft, a compression roller, an upper pressing plate, a lower pressing plate lifting driving mechanism, a lower pressing plate lifting guiding mechanism, a follower plate swinging support and a swinging driving mechanism of the follower plate swinging support; the swing driving mechanism of the follow-up plate swing support comprises an arc-shaped gear ring, a swing driving gear and a swing power mechanism, the arc-shaped gear ring is installed on the follow-up frame, the axis of the arc-shaped gear ring is overlapped with the axis of the fixed shaft, the gear teeth of the arc-shaped gear ring are arranged on the inner arc surface of the arc-shaped gear ring, the swing driving gear is pivoted on the follow-up plate swing support, the swing driving gear is in inner meshing with the arc-shaped gear ring, the swing power mechanism is installed on the follow-up plate swing support. The utility model discloses an arc ring gear of inner gearing and the simple structure novelty of the power of bending of swing drive gear transmission, and the power transmission of just bending is stable.

Description

a bending machine

technical field

The utility model relates to a bending machine, in particular to a bending machine for simultaneously bending a plurality of workpieces stacked from bottom to top.

Background technique

As a compact heat exchanger, the tube-fin heat exchanger has a wide range of applications in the refrigeration industry. The forming process of the heat exchanger mainly includes the following three forming processes: tube bending forming (forming U-shaped tubes), mechanical expanding tube forming (realizing tube-fin connection), tube bundle bending forming (forming L-shaped or U-shaped or G-shaped Heat Exchanger). Tube bundle bending is one of the key processes in heat exchanger forming, which has an important impact on the performance of heat exchangers.

When the tube bundle is bent and formed, the heat exchanger is first transported to the specified position, so that the part to be bent is close to the bending die (roller) with a predetermined bending radius, and then clamped on both sides of the bending die The heat exchanger makes the clamping parts on one side or both sides rotate and move around the bending die, so the heat exchanger is extruded into a specified bending angle along the bending die. More specifically, the heat exchanger is fed into the bending machine longitudinally in a flat state, and then the part to be bent is placed against the bending die in the transverse direction, the bending die is placed above the part to be bent, and the front end of the heat exchanger is clamped Between the bending die and the clamping die (lower platen), while the tail end is supported by the bottom plate (follower plate), the actuator is driven to rotate the bending die and the clamping die at a specified angle as required, and the clamping die is lifted to make The front section of the heat exchanger rotates around the center of the bending die to form along the bending die.

The structure of the bending mechanism of the existing bending machine is complex, and the bending power transmission for driving the workpiece to bend around the pressure roller is uneven, which affects the bending stability.

Contents of the invention

The purpose of the utility model is to provide a bending machine with simple structure.

The above-mentioned purpose is achieved through the following technical solutions:

A bending machine, comprising a first bending mechanism capable of bending workpieces, the first bending mechanism includes a follower frame, a fixed shaft, pressure rollers, an upper pressing plate, a lower pressing plate, a lifting drive mechanism for the lower pressing plate, and a lower pressing plate The lifting guide mechanism, the follower plate that can be dragged by the loaded workpiece, the swing support of the follower plate and the swing drive mechanism of the follower plate swing support; On the shaft, the lower pressing plate is set parallel to the upper pressing plate, the lower pressing plate lifting drive mechanism and the lower pressing plate lifting guiding mechanism are arranged between the follower frame and the lower pressing plate, the lower pressing plate lifting driving mechanism drives the lower pressing plate to slide along the lower pressing plate lifting guiding mechanism The lower platen approaches or moves away from the upper platen to clamp or loosen the workpiece; the follower plate swing bracket is rotatably mounted on the follower frame around a fixed axis, and the follower plate is installed on the follower plate swing support to follow the follower The plate swing bracket rotates around the fixed shaft so that when the follower plate rotates, it can drive the workpiece clamped between the upper platen and the lower platen to bend around the pressure roller; the swing drive mechanism of the follower plate swing support includes an arc gear ring, Swing drive gear and swing power mechanism, the arc ring gear is installed on the follower frame and the axis of the arc ring gear coincides with the axis of the fixed shaft, and the teeth of the arc ring gear are set on the inner arc surface of the arc ring gear Above, the swing driving gear is pivotally mounted on the swing bracket of the follower plate, and the swing drive gear is internally meshed with the arc ring gear. The swing power mechanism is installed on the swing bracket of the follower plate, and the swing power mechanism drives the swing drive gear to rotate.

Compared with the prior art, the utility model has the following advantages: the first bending mechanism disclosed in the utility model transmits the bending power through the internally meshing arc-shaped ring gear and the swing driving gear to drive the swing bracket and the follower plate Rotate around the fixed axis, when the follower plate rotates around the fixed axis, the workpiece clamped between the upper platen and the lower platen can be bent around the pressure roller, and the bending power is transmitted through the internal meshing arc ring gear and the swing driving gear The structure is simple and novel, and the bending power transmission is stable.

Description of drawings

Fig. 1 shows the three-dimensional schematic view of the utility model;

Fig. 2 has shown the top view of the utility model;

Fig. 3 shows the A-A sectional view of Fig. 2;

Fig. 4 shows the three-dimensional schematic diagram of the frame of the present utility model;

Fig. 5 shows a three-dimensional schematic view of the feeding guide bearing plate, the first bending mechanism, the material supporting mechanism, the second bending mechanism and the workpiece positioning mechanism of the present invention;

Fig. 6 shows a schematic perspective view of the first bending mechanism of the present invention;

Fig. 7 shows a three-dimensional exploded schematic view of the first bending mechanism of the present invention;

Fig. 8 shows a three-dimensional exploded schematic diagram of the lower pressing plate bracket and the lower pressing plate of the first bending mechanism of the present invention;

Fig. 9 shows a perspective exploded schematic diagram of another angle of the first bending mechanism of the present invention;

Figure 10 and Figure 11 show three-dimensional exploded schematic diagrams of the first bending mechanism of the present utility model at two different angles;

Fig. 12 shows a three-dimensional exploded schematic diagram of the lifting frame of the follower plate of the first bending mechanism of the present invention;

Fig. 13 shows a three-dimensional exploded schematic view of the follower plate of the first bending mechanism of the present invention;

Fig. 14a and Fig. 14b show the sliding schematic diagram of the follower plate of the first bending mechanism of the present invention, wherein Fig. 14a shows that the follower plate is in the reset position of the follower plate, and Fig. 14b shows The moving plate is at the maximum follow-up displacement position of the follower plate;

Fig. 15a to Fig. 15c show the bending working principle of the first bending machine of the present utility model;

Fig. 16 shows a three-dimensional schematic view of the workpiece positioning mechanism of the present invention;

Fig. 17 shows a three-dimensional exploded schematic view of the workpiece positioning mechanism of the present invention;

Fig. 18 shows a schematic cross-sectional view of the workpiece positioning mechanism of the present invention;

Fig. 19 shows a three-dimensional schematic view of a set of positioning units of the workpiece positioning mechanism of the present invention;

Fig. 20 shows a three-dimensional exploded schematic view of a set of positioning units of the workpiece positioning mechanism of the present invention;

Fig. 21 shows a schematic cross-sectional view of a set of positioning units of the workpiece positioning mechanism of the present invention;

Fig. 22 shows a three-dimensional exploded schematic view of a positioning assembly of the workpiece positioning mechanism of the present invention;

Fig. 23 shows a front view of a positioning assembly of the workpiece positioning mechanism of the present invention, wherein the positioning top plate is in the reset position;

Fig. 24 shows a front view of a positioning assembly of the workpiece positioning mechanism of the present invention, wherein the positioning top plate is pushed against by a workpiece and is in the detection position;

Fig. 25 shows a three-dimensional schematic view of the workpiece carrying-out mechanism of the present invention;

Fig. 26 shows a three-dimensional exploded schematic view of the workpiece carrying-out mechanism of the present invention;

Fig. 27 shows a schematic cross-sectional view of the workpiece carrying-out mechanism of the present invention;

Fig. 28a to Fig. 28f show the working principle diagram of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

As shown in Figures 1 to 5, a bending machine can be used to simultaneously bend multiple workpieces stacked from bottom to top, including a frame 1, which is fed into the bending machine along the workpiece The feeding direction is provided with the first bending mechanism 2 that can bend the rear section of the workpiece, the second bending mechanism 3 that can bend the front section of the workpiece, and the workpiece positioning that can position the workpiece before bending. Mechanism 4, as shown in Figures 16 to 24, the workpiece positioning mechanism 4 is used to position multiple workpieces stacked from bottom to top before simultaneous bending, and the workpiece positioning mechanism 4 includes multiple workpieces stacked from top to bottom The feeding direction of the workpiece is indented step by step on the positioning retaining surface 41, and each workpiece is against the different positioning retaining surface 41 to realize the positioning of each workpiece in the feeding direction of the workpiece. In this embodiment, the feeding direction of the workpiece is transverse.

The bending machine disclosed in the utility model is equipped with a workpiece positioning mechanism so that multiple workpieces stacked from bottom to top can be positioned in the feeding direction of the workpiece before bending, and the end contours of the stacked multiple workpieces after positioning It is stepped from bottom to top, which can compensate for the difference in the bending radius of each workpiece. Since each workpiece has a certain thickness, the bending radius of the workpiece on the upper layer must be smaller than that on the lower layer. The bending radius of the bending part of the workpiece, through the workpiece positioning mechanism, the end of the workpiece on the upper layer is indented by a certain distance from the end of the workpiece on the lower layer, and the indentation distance is used to compensate for the bending of the workpiece on the upper layer The difference between the bending radius of the workpiece and the bending radius of the workpiece on the lower layer makes the ends of the workpieces aligned after bending; in addition, the utility model adopts the first bending mechanism and the second bending mechanism to respectively Bending the front and rear sections of the workpiece can reduce the number of times to reposition the workpiece during the bending process, facilitate and quickly realize U-shaped forming, and improve production efficiency.

The workpiece positioning mechanism also includes a plurality of positioning components 42 stacked from bottom to top;

Each positioning assembly 42 includes a positioning base plate 421, a positioning top plate 422, a positioning elastic reset element 423, a positioning detection device and a limit mechanism. The positioning top plate 422 is slidably mounted on the positioning base plate 421 and the sliding direction of the positioning top plate 422 is parallel. In the feeding direction of the workpiece, the rear end surface of the positioning top plate facing the workpiece is the positioning retaining surface 41, and the limit mechanism is arranged between the positioning base plate 421 and the positioning top plate 422 so that the positioning top plate 422 slides between a reset position and a detection position The positioning elastic reset element 423 is arranged between the positioning base plate 421 and the positioning top plate 422 so that the positioning top plate 422 has a movement tendency to return to the reset position;

The positioning detection device can be installed on the positioning substrate 421, or can be installed on other components (such as a frame, a positioning chassis, a positioning sliding frame, etc.).

When the workpiece is sent into the bending machine along the feeding direction and abuts against the positioning stop surface 41 of the positioning top plate 422, the positioning top plate 422 in the reset position is pushed to slide to the detection position along the feeding direction of the workpiece, and the positioning detection device is used for detection Whether the positioning top plate 422 is in the detection position to determine whether the positioning of the workpiece is completed;

When the workpiece is separated from the positioning blocking surface 41 of the positioning top plate 422 , the positioning elastic reset element 423 drives the positioning top plate back to the reset position.

Each positioning assembly disclosed by the utility model has a simple structure and can detect whether the positioning of the workpiece is completed, so as to facilitate the subsequent bending process.

The limiting mechanism of each positioning assembly 42 includes a positioning limiting plate 425 .

Each positioning assembly also includes a plurality of positioning guide rods 426, and the positioning substrate 421 is provided with a plurality of positioning guide holes 4213 penetrating from the rear end surface 4211 of the positioning substrate towards the workpiece to the front end surface 4212 of the positioning substrate facing away from the workpiece. The axial direction of the hole 4213 is parallel to the feeding direction of the workpiece. Each positioning guide rod 426 cooperates with a positioning guide hole 4213. One end of each positioning guide rod 426 is connected with the front end surface 4221 of the positioning top plate facing away from the workpiece. Each positioning guide rod The other end of 426 passes through its corresponding positioning guide hole 4213 and protrudes from the front end surface 4212 of the positioning substrate facing away from the workpiece to connect with the positioning limit plate 425. In this embodiment, the other end of each positioning guide rod 426 passes through it. The corresponding positioning guide hole 4213 protrudes from the front end surface 4212 of the positioning substrate facing away from the workpiece and is connected with the same positioning limit plate 425. The rear end surface 4211 of the positioning substrate facing the workpiece is opposite to the front end surface 4221 of the positioning top plate facing away from the workpiece; In this embodiment, there are two positioning guide rods, however, as long as it does not deviate from the utility model, the number of positioning guide rods can be more than the number shown in the accompanying drawings.

The positioning top plate 422 is in the detection position when the rear end surface 4211 of the positioning substrate facing the workpiece is in contact with the front end surface 4221 of the positioning top plate facing away from the workpiece. At this time, the positioning limit plate 425 is separated from the front end surface 4212 of the positioning substrate facing away from the workpiece;

The positioning top plate 422 is in the reset position when the positioning limit plate 425 and the front end surface 4212 of the positioning substrate facing away from the workpiece are in contact. At this time, the rear end surface 4211 of the positioning substrate facing the workpiece is separated from the front end surface 4221 of the positioning top plate facing away from the workpiece.

The positioning detection device includes a positioning detection switch 424 capable of outputting signals. The positioning limit plate 425 is located between the positioning detection switch 424 and the front end surface 4212 of the positioning substrate facing away from the workpiece. the substrate faces away from the front of the front end face 4212 of the workpiece;

When the positioning top plate 422 is at the detection position, the positioning limit plate 425 approaches or touches the positioning detection switch 424 to trigger the positioning detection switch. The positioning of the workpiece is completed. In this embodiment, the positioning detection switch 424 is relatively fixed to the positioning substrate 421;

When the positioning top plate 422 is at the reset position, the positioning limiting plate 425 is away from the positioning detection switch.

The positioning elastic return element 423 includes a compression spring sleeved outside the positioning guide rod 426; in this embodiment, each positioning guide rod 426 is equipped with a compression spring;

On the rear end surface 4211 of the positioning substrate facing the workpiece, a concave positioning substrate countersunk hole 4214 is provided. The positioning substrate countersunk hole 4214 is coaxial with the positioning guide hole 4213, and the aperture of the positioning substrate countersunk hole 4214 is larger than the positioning guide hole 4213. aperture;

The front end surface 4221 of the positioning top plate facing away from the workpiece is provided with a concave positioning top plate countersunk hole 4222, the positioning top plate countersunk hole 4222 is coaxial with the positioning guide rod 426, and the aperture of the positioning top plate countersunk hole 4222 is larger than the positioning guide rod 426 outer diameter;

One end of the compression spring extends into the countersunk hole 4222 of the positioning top plate and abuts against the bottom wall 4223 of the countersunk hole of the positioning top plate, and the other end of the compression spring extends into the countersunk hole 4214 of the positioning substrate and abuts against the countersunk of the positioning substrate On the bottom wall 4215 of the hole.

A plurality of positioning assemblies 42 stacked from bottom to top are stacked with respective positioning base plates 421 , and two adjacent positioning base plates 421 can slide relative to each other to adjust the sliding of the positioning retaining surfaces 41 on the positioning top plates 422 on the adjacent two positioning top plates 422 The distance in the moving direction (that is, in the horizontal direction);

The workpiece positioning mechanism also includes a positioning locking mechanism that allows or prevents two adjacent positioning substrates 421 from sliding relative to each other. The two adjacent positioning base plates disclosed by the utility model can slide relatively to adjust the distance between the positioning retaining surfaces on the two adjacent positioning top plates in the sliding direction of the positioning top plate, so that it can adapt to different specifications (such as thickness, length, etc.) ) The workpiece is positioned and then bent.

The locking mechanism includes a positioning locking rod 427, the lower end of the positioning locking rod 427 is screwed to the positioning substrate 421 of the positioning assembly located at the bottom, and the upper end of the positioning locking rod 427 is provided with a pressing head 4271;

Except for the positioning base plate of the positioning component located at the bottom, the positioning base plates of other positioning components are provided with a positioning guide groove 4216 parallel to the sliding direction of the positioning top plate;

Each positioning guide groove is connected from top to bottom, and the lower end of the positioning locking rod 427 passes through each positioning guiding groove 4216 from top to bottom and is screwed into the positioning base plate of the positioning assembly located at the bottom layer, and the pressing head of the positioning locking rod The part 4271 is pressed against the positioning substrate of the positioning assembly located on the uppermost layer, the positioning locking lever 427 is loosened to allow two adjacent positioning substrates to slide relative to each other, and the positioning locking lever is tightened to prevent the two adjacent positioning substrates from sliding relative to each other. The locking mechanism disclosed by the utility model has the advantages of simple structure and convenient and fast operation. The positioning locking rod cooperates with the positioning guide groove to guide the sliding of the positioning substrate. Obviously, the sliding direction of the positioning substrate 421 is the same as that of the positioning top plate. In this embodiment, except for the positioning substrate of the positioning assembly located at the bottom, the positioning substrates of other positioning assemblies are provided with two positioning guide grooves spaced along the longitudinal direction, and there are two positioning locking rods. The bar positioning guide slot cooperates with a positioning locking lever.

A set of positioning unit 43 is composed of a plurality of positioning retaining surfaces 41 that indent step by step from top to bottom along the feeding direction of the workpiece into the bending machine. The workpiece positioning mechanism is provided with multiple sets of positioning units 43 arranged at intervals. The direction in which the positioning units are arranged at intervals is perpendicular to the feeding direction of the workpiece. In this embodiment, multiple sets of positioning units 43 arranged at intervals especially refer to multiple sets of positioning units 43 arranged at intervals along the longitudinal direction. Multiple sets of positioning units 43 disclosed in the utility model act simultaneously to stabilize the positioning of the workpiece. In the present embodiment, there are two sets of positioning units, and each set of positioning units includes three positioning assemblies. However, as long as it does not deviate from the utility model, the number of positioning units and the number of positioning assemblies of each set of positioning units can be more or less than The numbers shown in the attached figure.

The workpiece positioning mechanism also includes a positioning chassis 44, a positioning sliding frame 45, a sliding driving mechanism for positioning sliding frame, a sliding guiding mechanism for positioning sliding frame, a positioning lifting driving mechanism and a positioning lifting guiding mechanism;

The positioning chassis 44 is installed on the follower frame of the second bending mechanism 3, however, the positioning chassis 44 can also be installed on the frame 1, especially the head of the frame;

The sliding driving mechanism of the positioning sliding frame and the sliding guiding mechanism of the positioning sliding frame are arranged between the positioning chassis 44 and the positioning sliding frame 45, and the sliding driving mechanism of the positioning sliding frame drives the positioning sliding frame 45 along the positioning sliding frame. The sliding guide mechanism of the positioning sliding frame slides, and the sliding direction of the positioning sliding frame 45 is parallel to the feeding direction of the workpiece. After the positioning of the workpiece is completed, the sliding driving mechanism of the positioning sliding frame drives the positioning sliding frame 45 along with the workpiece Sliding in the opposite direction of the feeding direction keeps each positioning component away from the workpiece, which can prevent the workpiece from being hindered by the positioning component during the bending process;

The positioning lift drive mechanism and the positioning lift guide mechanism are arranged between the positioning base plate 421 of the lowermost positioning assembly and the positioning slide frame 45, and the positioning lift drive mechanism drives each positioning assembly 42 to lift up and down along the positioning lift guide mechanism. The workpiece positioning mechanism disclosed by the utility model can realize horizontal position adjustment and vertical position adjustment, and brings convenience to positioning work and bending work.

The sliding driving mechanism of this positioning sliding frame comprises the sliding driving motor 441 of positioning sliding frame, the sliding driving screw rod 442 of positioning sliding frame and the sliding driving nut 443 of positioning sliding frame, the sliding driving motor 441 of positioning sliding frame Installed on the positioning chassis 44, the sliding drive screw 442 of the positioning carriage is pivotally mounted on the positioning chassis 44, the sliding drive nut 443 of the positioning carriage is installed on the positioning carriage 45, the sliding of the positioning carriage The output shaft of the driving motor 451 is connected with the sliding drive screw 442 of the positioning carriage to drive the rotation of the sliding driving screw 442 of the positioning carriage, and the sliding driving screw 442 of the positioning carriage passes through the sliding movement of the positioning carriage. Drive the nut 443 to form a screw nut pair;

The sliding guiding mechanism of this positioning sliding frame comprises the sliding guide rail 444 of the positioning sliding frame installed on the positioning sliding frame 45 and the positioning sliding frame which is installed on the positioning chassis 44 and is slidingly matched with the sliding guide rail 444 of the positioning sliding frame. The sliding slider 445 of the frame;

The positioning lifting drive mechanism includes a positioning lifting drive cylinder 451, the cylinder body of which is installed on the positioning slide frame 45, and the outer end of the piston rod of the positioning lifting driving cylinder 451 is connected to the positioning member of the lowermost positioning assembly. On the substrate 421;

This positioning lifting guide mechanism comprises the positioning lifting guide sleeve 452 that is located on the positioning sliding frame 45 and the positioning lifting guide column 453 that is located on the positioning substrate 421 of the positioning assembly of the lowermost floor, and the positioning lifting guide column 453 can slide through. Locate the lifting guide sleeve 452.

After the workpiece positioning mechanism completes the positioning of the multiple workpieces stacked from bottom to top, the end contours of the stacked multiple workpieces are in a stepped shape from bottom to top.

As shown in Fig. 25 to Fig. 27, the bending machine is also provided with a workpiece carrying out mechanism 5, and the workpiece carrying out mechanism 5 is located between the first bending mechanism 2 and the second bending mechanism 3;

This workpiece carrying-out mechanism 5 comprises carrying out fixed rack 51, carrying out sliding frame 52, carrying out elevating frame 53, first clamping arm 54, second clamping arm 55, carrying out the sliding driving mechanism of sliding frame, carrying out the sliding guide mechanism of sliding frame , Lifting drive mechanism for unloading lifting frame, lifting and guiding mechanism for unloading lifting frame, first clamping arm sliding driving mechanism, first clamping arm sliding guiding mechanism, second clamping arm sliding driving mechanism, second clamping arm sliding guiding mechanism;

The moving out fixed frame 51 is installed on the top of the frame 1;

The sliding drive mechanism and the sliding guide mechanism of the unloading carriage are arranged between the unloading fixed frame 51 and the unloading carriage 52, and the sliding driving mechanism of the unloading carriage drives the unloading carriage 52 along the direction of the unloading carriage. The sliding guide mechanism slides, and the sliding direction of moving out the sliding frame 52 is vertical and perpendicular to the feeding direction of the workpiece;

The elevating drive mechanism of the unloading elevating frame and the elevating and guiding mechanism of the unloading elevating frame are located between the unloading slide frame 52 and the elevating frame 53. up and down;

The first clamping arm sliding drive mechanism and the first clamping arm sliding guide mechanism are arranged between the first clamping arm 54 and the lifting frame 53, and the first clamping arm sliding driving mechanism drives the first clamping arm 54 along the first The clamp arm slide guide mechanism slides to make the first clamp arm 54 approach or move away from the second clamp arm 55;

The second clamping arm sliding drive mechanism and the second clamping arm sliding guide mechanism are located between the second clamping arm 55 and the lifting frame 53, and the second clamping arm sliding driving mechanism drives the second clamping arm 55 along the second The clip arm sliding guide mechanism slides to make the second clip arm 55 approach or move away from the first clip arm 54 .

In this embodiment, the workpiece is clamped between the first clamp arm 54 and the second clamp arm 55 when the first clamp arm 54 and the second clamp arm 55 are relatively close, and the first clamp arm 54 is opposite to the second clamp arm 55. The workpiece can be released when moving away.

The workpiece moving-out mechanism disclosed by the utility model has a simple structure. The bent workpiece is clamped by the first clamping arm and the second clamping arm and the bent workpiece is output along the longitudinal direction. Since the bent workpiece is U-shaped, it can be The follower frame of the first bending mechanism, the follower plate swing arm of the first bend mechanism, the follower frame of the second bend mechanism and the follower plate swing arm of the second bend mechanism are all provided with available U The side opening 11 that the two vertical sections on the type workpiece (workpiece after bending) withdraw from.

The sliding drive mechanism of this unloading slide frame comprises the slide drive motor 511 of unloading slide frame, the slide drive screw mandrel 512 of unloading slide frame and the slide drive nut 513 of unloading slide frame, the slide drive motor 511 of unloading slide frame Installed on the moving-out fixed frame 51, the sliding driving screw 512 of the moving-out sliding frame is pivotally mounted on the moving-out fixing frame 51, the sliding driving nut 513 of the moving-out sliding frame is installed on the moving-out sliding frame 52, and the sliding of the moving-out sliding frame The output shaft of the driving motor 511 is connected with the sliding driving screw 512 of the sliding frame to drive the rotation of the sliding driving screw 512 of the sliding frame, and the sliding driving screw 512 of the sliding frame passes through the sliding of the sliding frame. Drive the nut 513 to form a screw nut pair;

The sliding guide mechanism of this unloading slide frame comprises the slide guide rail 514 of the unloading slide frame that is installed on the unloading fixed frame 51 and is installed on the unloading slide frame 52 and is slidingly matched with the slide guide rail 514 of the unloading slide frame. The sliding slider 515 of the frame.

The elevating drive mechanism of this unloading elevating frame comprises the elevating driving cylinder 521 of the elevating elevating frame that is located between the unloading slide frame 52 and the unloading elevating frame 53;

The lifting guide mechanism of this unloading lift comprises the lifting guide post 522 of the unloading lift that is located on the unloading lift 53 and the lifting guide sleeve 523 of the unloading lift that is located on the unloading slide 52. 522 slidably pass through the lifting guide sleeve 523 of the lifting frame.

The first clamping arm sliding driving mechanism includes a first clamping arm sliding driving cylinder 541 disposed between the first clamping arm 54 and the lifting frame 53;

The first clamping arm sliding guide mechanism includes a first clamping arm sliding guide post 542 arranged on the first clamping arm 54 and a first clamping arm sliding guide sleeve 543 located on the lifting frame 53. The arm sliding guide post 542 can slide through the first clip arm sliding guide sleeve 543 .

In this embodiment, the cylinder body of the first clamping arm sliding driving cylinder 541 is fixed on the lifting frame 53 , and the outer end of the piston rod of the first clamping arm sliding driving cylinder 541 is fixedly connected to the first clamping arm 54 .

The second clamping arm sliding driving mechanism includes a second clamping arm sliding driving cylinder 551 arranged between the second clamping arm 55 and the lifting frame 53;

The second clamping arm sliding guide mechanism includes a second clamping arm sliding guide column 552 arranged on the second clamping arm 55 and a second clamping arm sliding guide sleeve 553 arranged on the lifting frame 53 for carrying out the second clamping arm. The arm sliding guide post 552 slidably passes through the second clip arm sliding guide sleeve 553 .

In this embodiment, the cylinder body of the second clamping arm sliding driving cylinder 551 is fixed on the lifting frame 53 , and the outer end of the piston rod of the second clamping arm sliding driving cylinder 551 is fixedly connected to the second clamping arm 55 .

In this embodiment, the sliding guide rail of the unloading slide frame is perpendicular to the lifting guide post of the unloading lifting frame, the sliding guide post of the first clamping arm is parallel to the sliding guide rail of the unloading sliding frame, and the sliding guide post of the second clamping arm is also Parallel to the skid rails of the unloading carriage.

The first clamping arm 54 is provided with a first support plate 56 protruding toward the second clamping arm 55 and capable of supporting workpieces;

The second clamping arm 55 is provided with a second supporting plate 57 protruding toward the first clamping arm 54 and capable of supporting workpieces;

The first supporting board 56 is flat with the second supporting board 57 .

The first supporting plate and the second supporting plate disclosed by the utility model can support the bent workpiece to prevent the bent workpiece from falling when the bent workpiece is taken out, so that the moving out process is more stable, safe and reliable.

In this embodiment, when the first clamping arm and the second clamping arm are relatively close to each other, the workpiece is clamped between the first clamping arm and the second clamping arm, and the workpiece is supported by the first supporting plate and the second supporting plate. pallet.

The bending machine also includes a material receiving mechanism 6 , and the workpiece carrying-out mechanism 5 outputs the bent workpiece to the material receiving mechanism 6 along the longitudinal direction. The material receiving mechanism 6 is provided with a material receiving lifting platform 61 that can be lifted and can carry the bent workpiece.

The frame 1 is also provided with a material supporting mechanism 7 between the first bending mechanism 2 and the second bending mechanism 3. The material supporting mechanism 7 includes a material supporting plate 71 that can be lifted up and down and can carry workpieces. The material plate 71 can be flat with the lower pressing plate of the first bending mechanism and the lower pressing plate of the second bending mechanism when lifting up and down.

As shown in Figures 6 to 15c, the first bending mechanism 2 includes a follower frame 21, a fixed shaft 22, a pressing roller 23, an upper pressing plate 24, a lower pressing plate 25, a lower pressing plate lifting drive mechanism, a lower pressing plate lifting guide mechanism, A follower plate 26, a follower plate swing support and a swing drive mechanism of the follower plate swing support that can be dragged by the workpiece carried;

The fixed shaft 22 is vertically installed on the follower frame 21, the pressing roller 23 and the upper pressing plate 24 are installed on the fixed shaft 22, the lower pressing plate 25 is arranged in parallel with the upper pressing plate 24, and the lower pressing plate lifting drive mechanism and the lower pressing plate lifting guide mechanism are arranged on Between the follower frame 21 and the lower platen 25, the lower platen lifting drive mechanism drives the lower platen 25 to slide along the lower platen lifting guide mechanism so that the lower platen 25 approaches or moves away from the upper platen 24 to clamp or loosen the workpiece;

The follower plate swing bracket is rotatably mounted on the follower frame 21 around the fixed shaft 22, and the follower plate 26 is mounted on the follower plate swing support and follows the follower plate swing support to rotate around the fixed shaft 22 for follow-up. When the plate 26 rotates, it can drive the workpiece clamped between the upper pressing plate 24 and the lower pressing plate 25 to bend around the pressing roller 23;

The swing drive mechanism of the follower plate swing support includes an arc ring gear 27, a swing drive gear 28 and a swing power mechanism. The axes coincide, the teeth of the arc ring gear 27 are arranged on the inner arc surface of the arc ring gear 27, the swing drive gear 28 is pivotally mounted on the swing bracket of the follower plate, and the swing drive gear 28 and the arc ring gear 27 The internal engagement of the swing power mechanism is installed on the swing bracket of the follower plate, and the swing power mechanism drives the swing drive gear 28 to rotate.

The first bending mechanism disclosed by the utility model drives the swing bracket and the follower plate to rotate around the fixed axis through the internal meshing arc gear and the swing drive gear to transmit the bending power, and the follower plate to rotate around the fixed axis The workpiece clamped between the upper platen and the lower platen (especially the rear part of the workpiece) can be bent around the pressure roller, and the bending power is transmitted through the inner meshing arc ring gear and the swing driving gear. The structure is simple and novel, and Bending power transmission is stable.

There are two arc ring gears 27 and two swing drive gears 28;

Two arc-shaped ring gears 27 are distributed on both sides of the swing bracket of the follower plate. A swing drive gear 28 is internally engaged with an arc-shaped ring gear 27 for transmission. The swing power mechanism simultaneously drives the two swing drive gears 28 to rotate.

The swing power mechanism includes a swing drive motor 281, a swing reducer 282 and a swing transmission assembly. The swing drive motor 281 and the swing reducer 282 are installed on the swing bracket of the follower plate. The output shaft of the swing drive motor 281 and the swing reducer 282 The input end is connected, and the output end of the swing reducer 282 is connected with the two swing drive gears 28 through the swing transmission assembly. The transmission shaft 283 between them; the bending power transmitted by the two sets of internal meshing arc-shaped ring gears and the swing driving gear disclosed in the utility model can be evenly distributed on the follower plate, making it easier and smoother for the follower plate to wind around the fixed shaft Rotating to bend the workpiece, the existing drive mechanism generally realizes power transmission through a servo motor, a reducer, and a chain or belt transmission assembly. The chain or belt transmission assembly is connected to one side of the driven component. This makes the power transmission uneven.

The follower plate swing support includes a follower plate elevating frame 29 and a follower plate support outer frame, and the follower plate support outer frame can be rotatably installed on the follower frame 21 around the fixed shaft 22, and the follower plate 26 can slide It is installed on the follower plate lifting frame 29, the guide mechanism of the follower plate lift frame and the driving mechanism of the follower plate lift frame are arranged between the follower plate lift frame 29 and the supporting outer frame of the follower plate, and the follower plate lifts The driving mechanism of the frame drives the follower plate lifting frame 29 and the follower plate 26 to rise or fall along the guide mechanism of the follower plate lift frame so that the follower plate 26 is close to or away from the fixed shaft 22;

Between the follower plate 26 and the follower plate lifting frame 29, a follower plate guiding mechanism, a follower plate limit mechanism and an elastic resetting element of the follower plate that drives the follower plate to reset are provided;

The follower plate 26 is guided by the guide mechanism of the follower plate to slide, and when the follower plate 26 is parallel to the lower pressing plate 25, the sliding direction of the follower plate 26 is parallel to the feed direction of the workpiece, and the follower plate limit mechanism makes the follower plate The movable plate 26 slides between a follower plate reset position and a follower plate maximum follower displacement position, and the elastic reset element of the follower plate makes the follower plate 26 have a movement tendency to return to the follower plate reset position;

The follower plate limit mechanism comprises a first limit upper stop 261, a second limit upper stop 262, a first limit lower stop 291 and a second limit lower stop 295, the first limit upper stop 261 and the second limit upper stopper 262 are installed on the follower plate 26 at intervals, and the first limit lower stopper 291 and the second limit lower stopper 295 are installed on the follower plate lifting frame 29 at intervals , and the first limit lower stop 291 and the second limit lower stop 295 are located between the first limit upper stop 261 and the second limit upper stop 262, when the follower plate is equal to the lower pressure plate, Along the feed direction of the workpiece are the first limit upper stop 261, the first limit lower stop 291, the second limit lower stop 295 and the second limit upper stop 262, the first limit upper stop The block 261 is in the shape of a longitudinal strip;

As shown in Figure 14b, the follower plate 26 is at the maximum follower displacement position of the follower plate when the first limit upper block 261 and the first limit lower stop 291 are in contact; as shown in Figure 14a, the follower plate 26 When the second limit upper block 262 is in contact with the second limit lower block 295, it is in the reset position of the follower plate;

The follower plate 26 can be dragged by the workpiece carried on the follower plate to overcome the force of the elastic reset element of the follower plate and slide from the reset position of the follower plate toward the maximum follower displacement position of the follower plate.

The elastic return element of follower plate comprises extension spring 263, and one end of extension spring 263 is installed on the follower plate 26, and the other end of extension spring 263 is installed on the follower plate elevating frame 29, and in the present embodiment, follower plate 26 The bottom of the bottom is provided with upper hanging rod 268, and the following hanging rod 296 is provided on the follower plate elevating frame 29, and one end of extension spring 263 is hooked on upper hanging rod 268, and the other end of extension spring 263 is hooked on lower hanging rod 296.

The direction of the acting force of the elastic return element (ie extension spring) of the follower plate 26 of the first bending mechanism on the follower plate 26 of the first bending mechanism is always opposite to the feed direction of the workpiece. In this embodiment, the number of extension springs 263 is four, and the four extension springs are arranged vertically at intervals and in parallel.

The follower plate support outer frame includes two follower plate swing arms 201 and a follower plate bottom beam frame 202 arranged longitudinally at intervals, and one end of the two follower plate swing arms 201 is respectively hinged on the follower frame 21 and The two follower plate swing arms 201 are respectively close to the two ends of the pressure roller 23, and the follower plate bottom beam frame 202 is longitudinally connected between the other ends of the two follower plate swing arms 201;

The swing drive motor 281 and the swing reducer 282 are installed on the bottom beam frame of the follower plate, and the two swing drive gears 28 are respectively pivotally mounted on the two ends of the bottom beam frame 202 of the follower plate.

The driving mechanism of the follower plate lifter and the guide mechanism of the follower plate lifter are located between the follower plate bottom beam frame 202 and the follower plate lifter 29, and the drive mechanism of the follower plate lifter includes the follower plate lifter Clamp lift drive cylinder 292, the cylinder body of the follower plate lift clamp lift drive cylinder 292 is installed on the follower plate bottom beam frame 202, the outer end of the piston rod of the follower plate lift clip lift drive cylinder 292 is connected to the follower plate Plate lifting frame 29;

The guide mechanism of this follower plate lifting frame comprises the lifting guide sleeve 293 of the follower plate lifting frame that is located on the follower plate bottom beam frame 202 and the lifting guide sleeve 293 of the follower plate lifting frame that is located on the follower plate lifting frame 29. Column 294, the lifting guide column 294 of the follower plate lifting frame can slide through the lifting guide sleeve 293 of the follower plate lifting frame;

The follower plate guide mechanism includes a follower slide guide rail 264 arranged on the follower plate 26 and a follower slide slide block which is arranged on the follower plate lifting frame 29 and cooperates with the follower slide guide rail 264. 265. In this embodiment, the first limit upper stopper 261 , the second limit upper stopper 262 and the follower sliding guide rail 264 are all mounted on the bottom of the follower plate 26 .

A follower plate rack 266 is installed on the follower plate 26, a follower plate gear 267 that cooperates with the follower plate rack 266 is installed on the fixed shaft 22 or pressure roller 23, the axis of the follower plate gear 267 is fixed The axes of the shafts 22 coincide, and the length direction of the follower plate rack 266 is parallel to the sliding direction of the follower plate 26. In this embodiment, the follower plate gear 267 is installed on the fixed shaft 22;

The driving mechanism of the follower plate lifting frame drives the follower plate 26 to rise or fall between a bending position close to the fixed shaft 22 and a follower position away from the fixed shaft;

When the follower plate 26 is in the bending position, the follower plate rack 266 and the follower plate gear 267 keep meshing all the time to avoid the follower plate from being free along the follow-up direction due to the effect of its own gravity when the follower plate rotates around the fixed axis. Sliding phenomenon, to avoid abrasion of the workpiece, to ensure the quality of bending; during the rotation of the follower plate around the fixed axis, the rack of the follower plate is in the shape of a climbing follower plate gear;

When the follower plate 26 is in the follow-up position, the follower plate tooth bar 266 is disengaged from the follower plate gear 267. At this moment, the follower plate can be dragged and slid by the workpiece carried by the follower plate.

As shown in Figure 15a, the follower plate is at the follower position, the lower pressure plate is at the position of releasing the workpiece, the follower plate is flat with the lower press plate, and the follower plate rack and the follower plate gear are separated from each other;

As shown in Figure 15b, the follower plate is in the bending position, the lower pressure plate is in the position of clamping the workpiece, the follower plate is level with the lower pressure plate, and the follower plate rack and the follower plate gear mesh with each other;

Fig. 15c shows a schematic view of turning the swing support of the follower plate in the clockwise direction through 90° in Fig. 15b. °, the follower plate rack and follower plate gear keep meshing;

In this embodiment, there are two follower plate racks and two follower plate gears, one follower plate rack and one follower plate gear, and the two follower plate gears are respectively close to the two ends of the pressure roller. The two follower plate racks are respectively located on both sides of the follower plate.

The follower plate gear 267 may be a sector gear.

In this embodiment, the follower frame 21 is provided with a lower platen bracket 211, the lower platen lifting drive mechanism and the lower platen lifting guide mechanism are arranged between the lower platen bracket 211 and the lower platen 25, and the lower platen lifting drive mechanism includes a plurality of lower platen Platen lift drive cylinder 212, the cylinder body of each lower platen lift drive cylinder 212 is installed on the lower platen support 211, the outer end of the piston rod of each lower platen lift drive cylinder 212 is connected to the lower platen 25, the lower platen lift guide mechanism includes a plurality of The lower platen lifting guide sleeve 213 installed on the lower platen bracket 211 and a plurality of lower platen lifting guide posts 214 installed on the bottom of the lower platen 25 and extending downward, the lower platen lifting guide posts 214 can slide through the lower platen lifting guide Set 213. The lower pressing plate lifting drive mechanism drives the lower pressing plate 25 to rise or fall along the lower pressing plate lifting guide mechanism between a loose workpiece position away from the upper pressing plate 24 and a clamping workpiece position close to the upper pressing plate 24; the lower pressing plate is in the clamping workpiece position , the workpiece is clamped between the upper platen and the lower platen. When the follower plate is parallel to the lower press plate, the follower plate and the lower press plate are separated by the axis of the fixed shaft.

The second bending mechanism 3 has the same structure as the first bending mechanism 2, and the second bending mechanism 3 is arranged symmetrically with the first bending mechanism 2, that is to say, the elastic reset of the follower plate of the first bending mechanism The direction of the force of the element on the follower plate of the first bending mechanism is always opposite to the feed direction of the workpiece, while the elastic reset element of the follower plate of the second bending mechanism is opposite to the follower plate of the second bending mechanism The direction of the force is always the same as the feed direction of the workpiece. In this embodiment, the follower plate of the first bending mechanism, the lower pressing plate of the first bending mechanism, the lower pressing plate of the second bending mechanism, and the follower plate of the second bending mechanism are followed in sequence along the feed direction of the workpiece. , the first bending mechanism bends the rear section of the workpiece, and the second bending mechanism bends the front section of the workpiece. The follower plate swing bracket of the first bending mechanism bends the rear section of the workpiece when it rotates clockwise; the follower plate swing support of the second bending mechanism bends the front section of the workpiece when it rotates counterclockwise;

The bottom of the frame 1 is provided with a bottom sliding guide mechanism and a bottom sliding driving mechanism;

The bottom sliding guide mechanism includes a first bottom sliding rail 12, a first bottom sliding block 13, a second bottom sliding rail 14 and a second bottom sliding block 15, the first bottom sliding rail 12 and The second bottom sliding guide rails 14 are all parallel to the feed direction of the workpiece, and the first bottom sliding guide rails 12 and the second bottom sliding guide rails 14 can be connected or disconnected. In this embodiment, the first bottom sliding guide rails 12 There are two sliding guide rails 12 and two sliding guide rails 14 at the second bottom, wherein one first bottom sliding guide rail 12 and one second bottom sliding guide rail 14 are connected, and the other first bottom sliding guide rail 12 and Another second bottom sliding guide rail 14 is disconnected and spaced apart in the longitudinal position; the first bottom sliding slider 13 is installed on the bottom of the follower frame 21 of the first bending mechanism 2 and the first bottom The sliding slider 13 is slidably matched with the first bottom sliding guide rail 12, the second bottom sliding slider 15 is installed on the bottom of the follower frame 21 of the second bending mechanism 3 and the second bottom sliding slider 15 is slidably matched with the second bottom sliding guide rail 14;

The bottom sliding drive mechanism includes a bottom sliding driving screw 16, a bottom sliding driving motor 17, a first bottom sliding driving nut 18 and a second bottom sliding driving nut 19, and the bottom sliding driving screw 16 is pivotally mounted on the machine. At the bottom of the frame 1, the bottom sliding drive motor 17 is installed on the bottom of the frame 1, and the output shaft of the bottom sliding driving motor 17 is connected with the bottom sliding driving screw 16 to drive the bottom sliding driving screw 16 to rotate. A bottom sliding drive nut 18 is installed on the bottom of the follower frame 21 of the first bending mechanism 2, and a second bottom slide drive nut 19 is installed on the bottom of the follower frame 21 of the second bending mechanism 3, and the bottom slides The driving screw 16 passes through the first bottom sliding driving nut 18 and the second bottom sliding driving nut 19 at the same time, and when the bottom sliding driving screw rotates, the first bending mechanism 2 can be driven to face the second bending mechanism 3 close or relatively far away. The first bending mechanism disclosed in the utility model is relatively close to or relatively far from the second bending mechanism to adjust the bending specifications of the workpiece (such as the size after bending, the bending position, etc.).

In this embodiment, the first bending mechanism 2 is close to the tail of the frame 1, the second bending mechanism 3 is close to the head of the frame 2, and the follower plate of the first bending mechanism, the second bending mechanism along the feed direction of the workpiece are in sequence. The lower pressing plate of the first bending mechanism, the lower pressing plate of the second bending mechanism and the follower plate of the second bending mechanism, the first bending mechanism bends the rear section of the workpiece, and the second bending mechanism bends the front section of the workpiece Make a bend. The swing support of the follower plate of the first bending mechanism bends the rear section of the workpiece when it rotates clockwise; the swing support of the follower plate of the second bending mechanism bends the front section of the workpiece when it rotates counterclockwise.

The follower frame of the first bending mechanism is also provided with a feeding guide carrying plate 8, when the follower plate of the first bending mechanism is parallel to the lower pressing plate of the first bending mechanism, the feeding guide carrying plate and the first bending mechanism The follower plate of the bending mechanism is parallel, and when the follower plate of the first bending mechanism is in the follower position and the lower pressing plate of the first bending mechanism is in the position of releasing the workpiece, the feeding guide carrier plate, the first bending mechanism The follower plate and the lower pressing plate of the first bending mechanism are flat. At this time, the workpiece can be sent into the frame (that is, in the bending machine) along the feed direction of the workpiece by the guidance of the feeding guide carrier plate. In this embodiment, there are two material feeding guide bearing plates, and the two material feeding guide bearing plates are arranged at intervals along the longitudinal direction. The follower frame of the second bending mechanism is not provided with a feeding guide bearing plate 8 .

In this embodiment, along the feeding direction of the workpiece, there are feeding guide bearing plate, follower plate of the first bending mechanism, lower pressing plate of the first bending mechanism, supporting plate, and lower pressing plate of the second bending mechanism. 1. The follower plate of the second bending mechanism and each positioning retaining surface of the workpiece positioning mechanism.

The utility model can also include a controller (not shown in the figure) for controlling the first bending mechanism, the second bending mechanism, the workpiece positioning mechanism, and the workpiece carrying-out mechanism.

The utility model can realize U-shaped bending, and its working process is as follows:

As shown in Figure 28a, the follower plate of the first bending mechanism 2 is in the follow-up position, the lower pressing plate of the first bending mechanism 2 is in the position of releasing the workpiece, and the follower plate of the second bending mechanism 3 is in the follow-up position And the lower pressing plate of the second bending mechanism 3 is in the position of releasing the workpiece, along the feeding direction of the workpiece (the direction indicated by the arrow in Figure 28a is the feeding direction of the workpiece) successively for the feeding guide carrier plate 8, the first bending The follower plate of mechanism 2, the lower pressure plate of the first bending mechanism 2, the supporting plate 71, the follower plate of the second bending mechanism 3, the lower pressure plate of the second bending mechanism 3, the workpiece positioning mechanism from bottom to top The stacked positioning assembly, at this time, the feeding guide carrier plate 8, the follower plate of the first bending mechanism 2, the lower pressing plate of the first bending mechanism 2, the supporting plate 71, and the follower plate of the second bending mechanism 3 Plate and the lower pressing plate of the second bending mechanism 3 are flat, and the positioning top plate of each positioning assembly is in the reset position, and three positioning assemblies are shown in Figure 28a;

As shown in Figure 28b, the workpiece 9 is sent into the bending machine along the feeding direction of the workpiece. Figure 28b shows that three workpieces 9 stacked from bottom to top are sent into the bending machine, and the three workpieces can be sent into the bending machine respectively. The inside of the bending machine can also be stacked and sent into the bending machine together. The three workpieces are carried on the feeding guide bearing plate 8, the follower plate of the first bending mechanism 2 is in the follow-up position, and the lower part of the first bending mechanism 2 The follower plate of the pressing plate, the supporting plate 71, and the second bending mechanism 3 is in the follow-up position and the lower pressing plate of the second bending mechanism 3, and the end of the front section of each layer of workpieces pushes against the same layer of workpieces. The positioning top plate of the positioning component of the height and makes the positioning top plate slide from the reset position to the detection position along the workpiece feeding direction;

As shown in Figure 28c, the lifting frame of the follower plate of the first bending mechanism 2 is driven up so that the follower plate of the first bending mechanism 2 is in the bending position, and the lower platen of the first bending mechanism 2 is driven up so that it is in the bending position. Clamp the position of the workpiece, drive the lifting frame of the follower plate of the second bending mechanism 3 to rise so that the follower plate of the second bend mechanism 3 is in the bending position and drive the lower platen of the second bend mechanism 3 to rise so that it is in the clamping position. Hold the position of the workpiece, and the stacked workpieces are simultaneously clamped on the lower pressing plate of the first bending mechanism 2 and the upper pressing plate of the first bending mechanism 2 and the lower pressing plate of the second bending mechanism 3 and the upper pressing plate of the second bending mechanism 3. Between the pressing plates, when the lower pressing plate of the first bending mechanism 2 and the lower pressing plate of the second bending mechanism 3 rise, the three positioning assemblies and the lower pressing plate of the first bending mechanism 2 and the lower pressing plate of the second bending mechanism 3 are driven. The lower pressing plate rises at the same time so that the three positioning components can maintain the positioning of the three workpieces during the rising process. In addition, when the lower pressing plate of the first bending mechanism 2 and the lower pressing plate of the second bending mechanism 3 rise, they can also be driven simultaneously. The supporting plate 71 rises;

As shown in Figure 28d, after the stacked workpieces are clamped, the three positioning components retreat away from the workpiece along the workpiece feeding direction, and the positioning top plate of each positioning component returns to the reset position;

As shown in Figure 28e, drive the swinging support of the follower plate of the first bending mechanism to turn 90° in the clockwise direction to realize the bending of the rear section of the stacked workpieces. During the clockwise rotation of 90°, the rack of the follower plate of the first bending mechanism is always in mesh with the gear of the follower plate of the first bending mechanism, which can prevent the workpiece from colliding with the first bend during the bending process. The relative displacement of the follower plate of the mechanism wears the workpiece; the swing support of the follower plate of the second bending mechanism is driven to turn 90° in the counterclockwise direction to bend the front section of the stacked workpiece. When the moving plate swing bracket turns 90° in the counterclockwise direction, the follower plate rack of the second bending mechanism and the follower plate gear of the second bending mechanism are always in mesh, which can prevent the workpiece from being damaged during the bending process. The relative displacement with the follower plate of the second bending mechanism wears the workpiece; during the bending process of stacked workpieces, the first bending mechanism and the second bending mechanism can bend at the same time or at a different time.

Fig. 28f shows a schematic view of the workpiece after U-shaped bending.

Claims (10)

1. A bending machine, comprising a first bending mechanism capable of bending a workpiece, the first bending mechanism comprising a follower frame, a fixed shaft, a pressing roller, an upper pressing plate, a lower pressing plate, a lower pressing plate lifting drive mechanism, Lifting and guiding mechanism for the lower platen, a follower plate that can be dragged by the loaded workpiece, a swing support for the follower plate, and a swing drive mechanism for the swing support of the follower plate; The fixed shaft is installed longitudinally on the follower frame, the pressure roller and the upper platen are installed on the fixed shaft, the lower platen is set parallel to the upper platen, the lower platen lifting drive mechanism and the lower platen lifting guide mechanism are arranged between the follower frame and the lower platen During this period, the lower pressing plate lifting drive mechanism drives the lower pressing plate to slide along the lower pressing plate lifting guide mechanism so that the lower pressing plate approaches or moves away from the upper pressing plate to clamp or loosen the workpiece; The follower plate swing bracket is rotatably installed on the follower frame around the fixed shaft, and the follower plate is installed on the follower plate swing support and follows the follower plate swing support to rotate around the fixed axis so that the follower plate can rotate Drive the workpiece clamped between the upper platen and the lower platen to bend around the pressure roller; It is characterized by: The swing driving mechanism of the swing bracket of the follower plate includes an arc-shaped ring gear, a swing drive gear and a swing power mechanism. The teeth of the ring are set on the inner arc surface of the arc-shaped ring gear, the swing driving gear is pivotally mounted on the swing bracket of the follower plate, and the swing drive gear is internally meshed with the arc-shaped ring gear, and the swing power mechanism is installed on the follow-up plate On the board swing bracket, the swing power mechanism drives the swing drive gear to rotate. 2. A bending machine according to claim 1, characterized in that: There are two arc ring gears and two swing drive gears each; Two arc-shaped ring gears are distributed on both sides of the swing bracket of the follower plate, a swing drive gear is internally engaged with an arc-shaped ring gear for transmission, and the swing power mechanism simultaneously drives the two swing drive gears to rotate. 3. A bending machine according to claim 2, characterized in that: The bending machine also includes a frame, a second bending mechanism capable of bending workpieces, and a workpiece positioning mechanism. The first bending mechanism, the second bending mechanism, and the workpiece positioning mechanism are fed into the bending machine along the workpiece The directions are sequentially set on the machine frame. The workpiece positioning mechanism is used to position multiple workpieces stacked from bottom to top before simultaneous bending. The positioning retaining surface of step indentation, each workpiece leans against different positioning retaining surfaces to realize the positioning of each workpiece in the feeding direction of the workpiece. 4. A bending machine according to claim 3, characterized in that: The workpiece positioning mechanism also includes a plurality of positioning components stacked from bottom to top; Each positioning assembly includes a positioning base plate, a positioning top plate, a positioning elastic reset element, a positioning detection device and a limit mechanism. The positioning top plate is slidably installed on the positioning base plate and the sliding direction of the positioning top plate is parallel to the feeding direction of the workpiece. The rear end surface of the positioning top plate facing the workpiece is a positioning stop surface. The limit mechanism is arranged between the positioning base plate and the positioning top plate to make the positioning top plate slide between a reset position and a detection position. The positioning elastic reset element is arranged between the positioning base plate and the positioning top plate. between the positioning top plates so that the positioning top plate has a movement tendency to return to the reset position; When the workpiece is fed into the bending machine along the feed direction and abuts against the positioning stop surface of the positioning top plate, push the positioning top plate in the reset position to slide to the detection position along the feeding direction of the workpiece. The positioning detection device is used to detect whether the positioning top plate is In the detection position to determine whether the workpiece is positioned; When the workpiece is separated from the positioning blocking surface of the positioning top plate, the positioning elastic reset element drives the positioning top plate back to the reset position. 5. A bending machine according to claim 4, characterized in that: The limiting mechanism of each positioning component includes a positioning limiting plate; Each positioning assembly also includes a plurality of positioning guide rods, and the positioning substrate is provided with a plurality of positioning guide holes penetrating from the rear end surface of the positioning substrate facing the workpiece to the front end surface of the positioning substrate facing away from the workpiece, and the axis directions of the positioning guide holes are parallel. In the feed direction of the workpiece, each positioning guide rod is matched with a positioning guide hole, one end of each positioning guide rod is connected with the front end of the positioning top plate facing away from the workpiece, and the other end of each positioning guide rod passes through its corresponding positioning guide The hole protrudes from the front end of the positioning substrate facing away from the workpiece to connect with the positioning limit plate, and the rear end of the positioning substrate facing the workpiece is opposite to the front end of the positioning top plate facing away from the workpiece; The positioning top plate is in the detection position when the rear end surface of the positioning substrate facing the workpiece is in contact with the front end surface of the positioning top plate facing away from the workpiece. At this time, the positioning limiting plate is separated from the front end surface of the positioning substrate facing away from the workpiece; The positioning top plate is in the reset position when the positioning limit plate and the front end surface of the positioning substrate facing away from the workpiece are in contact. At this time, the rear end surface of the positioning substrate facing the workpiece is separated from the front end surface of the positioning top plate facing away from the workpiece; A plurality of positioning components stacked from bottom to top are stacked with respective positioning substrates, and two adjacent positioning substrates can slide relative to each other to adjust the distance between the positioning retaining surfaces on two adjacent positioning top plates in the sliding direction of the positioning top plate ; The workpiece positioning mechanism also includes a positioning locking mechanism that can allow or prevent two adjacent positioning substrates from sliding relative to each other. 6. A bending machine according to claim 4, characterized in that: The workpiece positioning mechanism also includes a positioning chassis, a positioning sliding frame, a sliding driving mechanism of the positioning sliding frame, a sliding guiding mechanism of the positioning sliding frame, a positioning lifting driving mechanism and a positioning lifting guiding mechanism; The positioning chassis is installed on the frame; The sliding driving mechanism of the positioning sliding frame and the sliding guiding mechanism of the positioning sliding frame are arranged on the positioning bottom frame and the positioning sliding frame, and the sliding driving mechanism of the positioning sliding frame drives the positioning sliding frame along the sliding guiding mechanism of the positioning sliding frame sliding, and the sliding direction of the positioning carriage is parallel to the feeding direction of the workpiece; The positioning lifting drive mechanism and the positioning lifting guide mechanism are arranged between the positioning base plate and the positioning sliding frame of the positioning assembly at the bottom, and the positioning lifting driving mechanism drives each positioning assembly to lift up and down along the positioning lifting guide mechanism. 7. A bending machine according to any one of claims 1 to 6, characterized in that: The bending machine is also provided with a workpiece carrying-out mechanism, and the workpiece carrying-out mechanism is located between the first bending mechanism and the second bending mechanism; The workpiece carrying-out mechanism includes a moving-out fixed frame, a moving-out sliding frame, a moving-out elevating frame, a first clamp arm, a second clamping arm, a sliding driving mechanism for carrying out a sliding frame, a sliding guide mechanism for carrying out a sliding frame, and a lifting frame for carrying out a lifting frame. The driving mechanism, the lifting guide mechanism for moving out the lifting frame, the first clamping arm sliding driving mechanism, the first clamping arm sliding guiding mechanism, the second clamping arm sliding driving mechanism, and the second clamping arm sliding guiding mechanism; The removal fixture is installed on the top of the rack; The sliding driving mechanism of the unloading slide frame and the sliding guide mechanism of the unloading sliding frame are arranged between the unloading fixed frame and the unloading sliding frame, and the sliding driving mechanism of the unloading sliding frame drives the unloading sliding frame along the sliding guide Mechanism slippage; The lifting drive mechanism of the unloading lift and the lifting guide mechanism of the unloading lift are arranged between the unloading slide frame and the unloading lift, and the lifting drive mechanism of the unloading lift drives the unloading lift up and down along the lifting guide mechanism of the unloading lift; The first clamping arm sliding driving mechanism and the first clamping arm sliding guiding mechanism are arranged between the first clamping arm and the lifting frame, and the first clamping arm sliding driving mechanism drives the first clamping arm to slide along the first clamping arm. The sliding guide mechanism slides so that the first clamping arm approaches or moves away from the second clamping arm; The second clamping arm sliding driving mechanism and the second clamping arm sliding guiding mechanism are arranged between the second clamping arm and the lifting frame, and the second clamping arm sliding driving mechanism drives the second clamping arm to slide along the second clamping arm. The sliding guide mechanism slides so that the second clamping arm approaches or moves away from the first clamping arm; The first clamping arm is provided with a first supporting plate extending toward the second clamping arm and capable of supporting workpieces; The second clamping arm is provided with a second supporting plate protruding toward the first clamping arm and capable of supporting workpieces. 8. A bending machine according to claim 7, characterized in that: The feeding direction of the workpiece is horizontal, and the sliding direction of the unloading carriage is vertical and perpendicular to the feeding direction of the workpiece; The bending machine also includes a material receiving mechanism, and the workpiece moving out mechanism outputs the bent workpiece to the material receiving mechanism along the longitudinal direction; A material supporting mechanism is also provided on the frame between the first bending mechanism and the second bending mechanism, and the material supporting mechanism includes a supporting plate that can be lifted up and down and can carry workpieces. 9. A bending machine according to any one of claims 1 to 6, characterized in that: The follower plate swing support includes a follower plate lifting frame and a follower plate support outer frame, the follower plate support outer frame is rotatably installed on the follower frame around a fixed axis, and the follower plate is slidably installed on the follower plate On the lifting frame of the moving plate, the guiding mechanism of the lifting frame of the moving plate and the driving mechanism of the lifting frame of the moving plate are arranged between the lifting frame of the moving plate and the supporting outer frame of the moving plate, and the driving mechanism of the lifting frame of the following plate drives the The moving plate lift frame and the follower plate rise or fall along the guide mechanism of the follower plate lift frame so that the follower plate approaches or moves away from the fixed shaft; A follower plate guide mechanism, a follower plate limit mechanism, and an elastic reset element of the follower plate that drives the follower plate to reset are arranged between the follower plate and the follower plate lifting frame; The follower plate slides under the guidance of the follower plate guide mechanism, and the follower plate limit mechanism makes the follower plate slide between a follower plate reset position and a follower plate maximum follower displacement position, and the follower plate The elastic reset element makes the follower plate have a movement tendency to return to the reset position of the follower plate; The follower plate support outer frame includes two follower plate swing arms arranged at intervals and a follower plate bottom beam frame, one end of the two follower plate swing arms is respectively hinged on the follower frame, and the follower plate bottom beam frame is connected between the other ends of the two follower plate swing arms; The driving mechanism of the follower plate lifter and the guide mechanism of the follower plate lifter are arranged between the bottom beam frame of the follower plate and the follower plate lifter, and the drive mechanism of the follower plate lifter includes the lifter of the follower plate lifter Drive the cylinder, the cylinder body of the lifting and lowering drive cylinder of the follower plate is installed on the bottom beam frame of the follower plate, and the outer end of the piston rod of the lifter drive cylinder of the follower plate is connected to the lifter of the follower plate; The guide mechanism of this follower plate lifting frame comprises the lifting guide sleeve of the follower plate lifting frame that is located on the follower plate bottom beam frame and the lifting guide column of the follower plate lifting frame that is located on the follower plate lifting frame. The lifting guide column of the moving plate lifting frame can slide through the lifting guide sleeve of the moving plate lifting frame; The follower plate rack is installed on the follower plate, and the follower plate gear matched with the follower plate rack is installed on the fixed shaft or the pressure roller. The axis of the follower plate gear coincides with the axis of the fixed shaft, and the follower plate The length direction of the plate rack is parallel to the sliding direction of the follower plate; The driving mechanism of the follower plate lifting frame drives the follower plate to rise or fall between a bending position close to the fixed axis and a follower position away from the fixed axis; When the follower plate is in the bending position, the follower plate rack and follower plate gear are always in mesh; When the follower plate is in the follow-up position, the follower plate tooth bar is separated from the follower plate gear. 10. A bending machine according to any one of claims 3 to 6, characterized in that: The swing power mechanism includes a swing drive motor, a swing reducer and a swing transmission assembly. The swing drive motor and the swing reducer are installed on the swing support of the follower plate. The output shaft of the swing drive motor is connected to the input end of the swing reducer, and the swing speed The output end of the device is connected with two swing driving gears through the swing transmission assembly; The second bending mechanism has the same structure as the first bending mechanism, and the second bending mechanism is arranged symmetrically with the first bending mechanism; The bottom of the frame is provided with a bottom sliding guide mechanism and a bottom sliding driving mechanism; The bottom sliding guide mechanism includes a first bottom sliding rail, a first bottom sliding block, a second bottom sliding rail and a second bottom sliding block, the first bottom sliding rail and the second bottom sliding The guide rails are all parallel to the feeding direction of the workpiece, the first bottom sliding block is installed on the bottom of the follower frame of the first bending mechanism and the first bottom sliding block is slidably matched with the first bottom sliding guide rail , the second bottom sliding block is mounted on the bottom of the follower frame of the second bending mechanism and the second bottom sliding block is slidably matched with the second bottom sliding guide rail; The bottom sliding driving mechanism includes a bottom sliding driving screw, a bottom sliding driving motor, a first bottom sliding driving nut and a second bottom sliding driving nut, and the bottom sliding driving screw is pivotally mounted on the bottom of the frame. The sliding driving motor is installed on the bottom of the frame, and the output shaft of the bottom sliding driving motor is connected with the bottom sliding driving screw to drive the bottom sliding driving screw to rotate, and the first bottom sliding driving nut is installed on the first fold The bottom of the follower frame of the bending mechanism, the second bottom sliding drive nut is installed on the bottom of the follower frame of the second bending mechanism, and the bottom slide drive screw passes through the first bottom slide drive nut and the second bottom at the same time The sliding driving nut can drive the first bending mechanism and the second bending mechanism to be relatively close to or relatively far away when the bottom sliding driving screw rotates.