CN211360345U - Secondary bending die based on U-shaped sheet metal part - Google Patents

Abstract

The utility model discloses a secondary bender based on U type sheet metal component belongs to numerical control die utensil panel beating field. It includes terrace die and die sinking, the die sinking is equipped with bending groove, its characterized in that: the bending groove of the lower female die is internally provided with a lower die ejector block in a matching manner, the lower die ejector block is fixedly connected with the bottom of the bending groove through an ejector spring, the working surface of the lower die ejector block coincides with the upper surface of the lower female die, the lower die ejector block can synchronously move downwards along with the bending of a workpiece during the bending operation and further comprises a positioning backup plate, one side of the positioning backup plate, which is close to the lower die ejector block, is provided with a positioning groove, the bottom of the positioning groove is the upper surface of the lower female die, and the cavity shape of the positioning groove is matched with the shape of the surface to be bent on the workpiece. The utility model discloses the secondary that can process smallclothes U type sheet metal component is bent, forms the sheet metal component that all has the right angle limit of bending on the four sides.

Description

Secondary bending die based on U-shaped sheet metal part

Technical Field

The utility model belongs to numerical control die utensil panel beating field, more specifically say, relate to a secondary bender based on U type sheet metal component.

Background

The sheet metal is a comprehensive cold processing technology aiming at sheet metal (generally below 6 mm), comprising shearing, punching/cutting, compounding, folding, welding, riveting, splicing, forming (such as automobile bodies) and the like, and along with the development of technologies such as numerical control punching, bending, laser cutting and the like, the sheet metal has higher production efficiency and stronger batch productivity, and is widely applied to the industries such as electromechanics, light industry, automobiles and the like. When the sheet metal part is used, the sheet metal part needs to be bent, and the bending of the sheet metal part refers to the processing of changing the angle of a plate or a plate, such as bending the plate into a V shape or a U shape.

However, generally, four sides of the sheet metal part need to be bent, and to complicated sheet metal parts, the shapes of the four sides are all different, and the sheet metal parts with different shapes of the four sides are generally machined by integrally formed dies in the market, but the integrally formed dies are only suitable for bending the workpieces with the shapes, and the sheet metal parts with slightly changed shapes and sizes need to be redesigned to manufacture corresponding dies, so that the cost is high.

For example, a patent application with chinese patent application No. 201910611011.6 and publication No. 2019, 8 and 23 discloses a die for bending and forming a sheet metal U-shaped part. The die structure of this patent mainly includes stamping rod, upper die base, terrace die, die holder, die, ejector pin, roof and adjusting bolt, stamping rod fixed mounting in the middle cavity of upper die base, the terrace die install the lower extreme at the upper die base, the die install the upper end at the die holder and cooperate with the terrace die, ejector pin fixed mounting in the middle cavity of die holder, the roof be located the ejector pin, adjusting bolt install the left and right sides at the die. The bending and forming die for the U-shaped sheet metal part is simple and practical, is convenient to operate, not only well meets the production requirement of bending and forming the U-shaped sheet metal part, but also greatly reduces the use cost of the die, and has high application value. Although this mould can be through the interval of adjusting bolt regulation die left and right sides to realize the fine setting of sheet metal component size, but on the one hand, this mould is when the sheet metal component of processing different shapes, still need change different terrace dies and adapt to the integrative shaping of bending of sheet metal component, and on the other hand, this mould can only once bend the both sides of sheet metal component, and it is difficult to carry out the secondary to other both sides of not bending, and this mould bending operation is difficult to the drawing of patterns after accomplishing in addition, blocks easily in the die.

In the prior art, in order to avoid the defect of one-time bending forming, multi-time bending operation is adopted to realize the processing of multi-edge bent sheet metal parts. Through retrieval, the patent application document with the Chinese patent application number of 201820043022.X and the application publication date of 2018, 8 and 31 discloses a sheet metal part right-angle bending die. The mould of bending of this patent includes mould and lower mould, the lower mould include die carrier down, be provided with the lower mould of bending in the top of die carrier down, the side of the lower mould of bending is connected with the lower mould sloping block through bolt detachable, is provided with the inclined plane on the lower mould sloping block, is provided with the slide on the die carrier down, sliding connection has the slip supporting shoe on the slide, is provided with the adjustment jar of horizontal distribution on the slip supporting shoe, the tip of adjustment jar working shaft rotates to be supported there is the compression roller, still is provided with locking mechanism on the slip supporting shoe. The bending die is simple in structure and ingenious in design, and can accurately bend a sheet metal part into a right-angled bend in an angle compensation mode. However, for the sheet metal part with two sides already bent at a certain angle, the work of bending the other two sides by using the die cannot be realized.

Therefore, in order to complete the secondary bending work of the sheet metal part with the bent part edge, it is necessary to develop a single-side bending die for the sheet metal part.

Disclosure of Invention

1. Problems to be solved

The utility model provides a secondary bender based on U type sheet metal component, its aim at solve current bender can not the secondary bend the problem of bending into U type work piece, solve the problem of drawing of patterns difficulty simultaneously.

The utility model provides a secondary bender based on U type sheet metal component has still further solved the location problem of sheet metal component.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The utility model provides a secondary bender based on U type sheet metal component, includes male die and lower die, the die is equipped with the recess of bending down, the recess fit of bending of die is equipped with down mould ejector pad down, through ejector spring fixed connection between lower mould ejector pad and the bottom of the recess of bending, wherein, the working face of lower mould ejector pad coincides with the upper surface of die down, and when the operation of bending, lower mould ejector pad can move down along with the work piece is bent in step, and the junction between lower mould ejector pad and the lower die corresponds the position of bending of work piece.

Further, the upper surface of die is equipped with the location backup plate down, the constant head tank has been seted up to one side that the location backup plate is close die ejector piece down, wherein, the bottom of constant head tank is the upper surface of die down, the shape of cavity shape and the face shape size phase-match that treats bending on the work piece of constant head tank, wherein, the location backup plate is used for limiting the longitudinal movement of work piece, and seting up of constant head tank is used for adapting to the shape that the face was treated bending to the work piece.

Furthermore, two sides of the bending groove are respectively provided with a row of positioning rods for positioning the side surface of the workpiece, wherein the side edge of the workpiece refers to the side surface of the U-shaped sheet metal part which is bent into an angle, namely two sides of the surface of the workpiece which is not to be bent.

Further, the distance between the two rows of positioning rods is larger than the width of the workpiece, so that the purpose of bending workpieces with various widths is achieved.

Furthermore, the upper surface of the positioning backup plate is also fixedly provided with a positioning pin for positioning the upper male die, and the positioning pin is inserted into the upper male die in a matching manner or contacts the upper male die so as to realize the positioning of the upper male die.

Furthermore, the device also comprises an upper die fixing plate, a guide pillar and a compression spring; the upper male die is fixed at the bottom of the upper die fixing plate; one end of the guide post is fixed on the lower concave die, and the other end of the guide post penetrates through the upper die fixing plate; and a compression spring is arranged between the lower female die and the upper die fixing plate and sleeved on the guide pillar, wherein the upper die fixing plate moves up and down along the guide pillar, the compression spring is in a compression state when the upper die fixing plate moves down, and the compression spring gives an upward die opening force to the upper die fixing plate when the die is opened.

Furthermore, a guide sleeve is installed in the upper die fixing plate, and the guide pillar penetrates through the guide sleeve.

Furthermore, a check ring is fixed at the top of the guide post through a locking bolt, so that the upper die fixing plate is prevented from being separated from the guide post.

Further, still include the mould, go up the mould fixed plate and be fixed in the mould bottom, it is equipped with mould clamping part to go up the mould top for the clamping is to the bender slider on.

The lower die base is used for fixing the lower concave die and is fixed on a machine tool through locking screws.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a bender is to the bending die of non-dull and stereotyped sheet metal component, namely both sides have all formed the work piece of certain bending angle, use the utility model discloses a secondary bender, can dodge the U type side that has been bent and formed, when making its side of bending not destroyed, can also be in the same direction bend the not edge of bending, form the sheet metal component that all has the right angle side of bending on four sides; meanwhile, after the workpiece is machined, the lower die ejector block can move upwards along with the upward elasticity of the ejector spring, so that the workpiece is prevented from being clamped in the bending female die;

(2) the bending die of the utility model is provided with the positioning backup plate, which can prevent the longitudinal movement of the workpiece, avoid the dislocation of the workpiece when the upper male die is pressed down, ensure that the bending position is not accurate, and ensure that the bottom surface of the bending groove arranged on the bending die is the same as the shape of the part of the workpiece to be bent, thereby ensuring that the positioning is more accurate;

(3) the positioning rods of the utility model are used for positioning the side surfaces of the workpieces, and the distance between the two rows of positioning rods is greater than the width of the workpieces to be bent, so that the bending machine is suitable for workpieces with at least one right-angle side surface and is suitable for bending workpieces with various widths, and the higher right-angle side of the workpieces is leaned against the corresponding positioning rod in the row before bending operation, so that the placing position of the workpieces is limited to form an angle of 90 degrees with the crease position to be bent, and the purpose of accurate positioning is further achieved;

(4) the positioning backup plate of the utility model is also provided with a positioning pin to prevent the dislocation of the mounting position of the upper male die, thereby influencing the bending work;

(5) the utility model uses the matching of the guide post, the guide sleeve and the compression spring, on one hand, the guide post has high guiding and bending precision, the product quality is stable, and the upper and lower moving of the upper die fixing plate is regulated to not deviate along the direction of the guide post; on the other hand, the compression spring is used for applying pressure to the upper die only when the upper die moves downwards, so that the elastic force of the compression spring is favorably used for demoulding when demoulding, and hoisting is not needed;

(6) the utility model discloses a secondary bender is applicable to sheet metal and miniature sheet metal component, and the operation of bending of small-size work piece need not to use the bender to carry out work.

Drawings

FIG. 1 is a front view of an exploded view of the bending die of the present invention;

FIG. 2 is an isometric view of an exploded view of the bender of the present invention;

FIG. 3 is an axonometric view of the bending die of the utility model in use;

FIG. 4 is a left side view of the bending die of the present invention in use;

FIG. 5 is a front view of the bending die of the present invention in use;

FIG. 6 is a top view of the bending die of the present invention in use;

FIG. 7 is a schematic structural view of a workpiece according to the present invention;

FIG. 8 is a top view of a workpiece according to the present invention;

in the figure:

100. an upper die portion; 110. an upper die; 111. an upper die clamping part; 120. an upper die fixing plate; 130. an upper male die; 140. a guide post; 150. a guide sleeve; 160. a compression spring; 170. locking the bolt; 180. a retainer ring;

200. a lower die portion; 210. a lower concave die; 211. bending the groove; 220. a lower die ejector block; 221. a working surface; 230. a material ejecting spring; 240. positioning a rod; 250. positioning a backup plate; 251. positioning a groove; 252. positioning pins; 260. a lower die holder; 261. locking screws;

300. a workpiece; 310. bending a surface; 320. bending the working surface; 330. a first side surface; 340. a second side surface; 350. a third side surface.

Detailed Description

The structure of the U-shaped sheet metal part to be processed according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 7 and 8, a U-shaped sheet metal part with a special structure, i.e. a workpiece 300 processed by the bending die of the present invention, includes a bending surface 310, a bending working surface 320, a first side surface 330, a second side surface 340 and a third side surface 350. The bending surface 310 and the bending working surface 320 are symmetrically arranged at two ends of the workpiece in the length direction, and the bending surface 310 and the bending working surface 320 form a right angle with each other, which is the target of the bending work of the bending die of the utility model; the first side 330 overlaps the bottom surface of the workpiece 300, and the area of the first side 330 is smaller than the area of the bottom surface of the workpiece 300; the edge of the first side surface 330 extending to the bottom surface of the workpiece 300 is folded upwards to form a second side surface 340 perpendicular to the first side surface 330; and is bent parallel to the second side 340 and at the other side of the workpiece 300 to form a third side 350. It should be noted that, the utility model discloses the face 310 of bending of its length direction both sides face of U type sheet metal component that the bender waited to process all is on same horizontal plane with the working face 320 of bending, forms the sheet metal component that two bending faces 310 all become 90 bending angles with the working face 320 of bending after bending.

The present invention will be further described with reference to the following specific embodiments.

Example 1

Referring to fig. 1 and 2, the secondary bender based on U-shaped sheet metal parts according to the present embodiment includes an upper die portion 100 and a lower die portion 200, where the upper die portion 100 includes an upper die 110, an upper die fixing plate 120, and an upper male die 130, which are connected in sequence, and the lower die portion 200 includes a lower female die 210, a lower die ejector block 220, an ejector spring 230, and a positioning backup plate 250.

Specifically, the upper die 110 of upper die portion 100 is located at the top-most layer of the die and includes an upper die clamping portion 111 at the upper portion thereof that engages a bender slide or other pressure-imparting device; an upper die fixing plate 120 is fixed below the upper die 110, guide sleeve holes are formed in the periphery of the upper die fixing plate 120, guide sleeves 150 are installed in the guide sleeve holes, guide pillars 140 are inserted into the guide sleeves 150 in a matching mode, and the lower ends of the guide pillars 140 are fixed on a lower female die 210, so that the guide sleeves 150 can slide up and down along the guide pillars 140, and the upper die fixing plate 120 is driven to move up and down along the direction of the guide pillars 140; an upper male die 130 is fixed below the upper die fixing plate 120, the size and the shape of the working surface of the upper male die 130 are matched with the size and the shape of the bending working surface 320 on the workpiece 300, and the upper male die 130 performs die opening and die closing along with the up-and-down movement of the upper die fixing plate 120; it is worth noting that the end of the guide post 140 is closed off from the port by a collar 180, and the collar 180 and the upper top port of the guide post 140 are fixedly connected by a locking bolt 170. More importantly, the upper die fixing plate 120 is connected with the lower die 210 through the compression spring 160, the compression spring 160 is sleeved on the guide pillar 140, when the upper die fixing plate 120 moves downwards, the compression spring 160 is compressed, when the upper die fixing plate 120 moves upwards, no additional upper pulling force is needed, the die opening operation is completed through the resilience force of the compression spring 160, the structure is simple, and the bending processing of various small-sized workpieces is adapted.

A bending groove 211 is formed in the lower die 210 of the lower die part 200, the bending groove 211 is internally connected with a lower die ejector block 220 through an ejector spring 230, before bending, the working surface 221 of the lower die ejector block 220 is flush with the upper surface of the lower die 210, and the joint between the lower die ejector block and the lower die ejector block corresponds to the joint of the bending surface 310 and the bending working surface 320 of the workpiece 300; the positioning rods 240 perpendicular to the bottom surface of the bending groove 211 are further fixed in the bending groove 211, two rows of the positioning rods 240 are arranged and are respectively arranged on two sides of the bending groove 211, and the distance between the two rows of the positioning rods 240 is equal to the width of the workpiece; in order to prevent the workpiece 300 from longitudinally deviating, a positioning backup plate 250 is arranged on the upper surface of the lower die 210 close to the bending groove, a positioning groove 251 is formed in the positioning backup plate 250, the bottom surface of the positioning groove 251 is the bottom surface of the lower die 210, and the shape of the bottom surface of the positioning groove 251 is matched with the shape of a bending surface 310 on the workpiece 300, it is worth explaining that the bending surface 310 is often in an asymmetric structure, the bending surface 310 to be processed in this embodiment is in an end edge irregular shape, in order to adapt to bending of two bending surfaces 310, so the positioning groove 251 in this embodiment is set to be in a left-right symmetric structure, the shape of half of the positioning groove 251 is matched with the shape of half of the bending surface 310, and when the bending surface 310 of the workpiece 300 is placed in the positioning groove 251, the joint of the bending surface 310 and the bending; the positioning backup plate 250 is further provided with a positioning pin 252, and when the mold is closed, the positioning pin 252 is inserted into the corresponding positioning hole of the upper male mold 130 in a matching manner, so that the upper male mold 130 is accurately positioned and the upper male mold 130 is prevented from being dislocated; in order to bear the clamping pressure and avoid the problem that the machine tool workbench is easy to damage, the lower female die 210 of the embodiment is mounted on the lower die holder 260 for buffering the clamping pressure, and the lower die holder 260 is mounted on the machine tool through a locking screw 261.

In order to machine-shaping the utility model relates to a U-shaped sheet metal component of special construction, this embodiment a use method based on the secondary bender of U type sheet metal component as follows:

s101, assembling the bending die of the present embodiment, so that the upper male die 130 and the lower female die 210 are in a die-opened state, then placing the bending surface 310 of the workpiece 300 in the positioning groove 251 of the positioning backup plate 250, and the bending working surface 320 is located on the working surface 221 of the lower die ejector block 220, and meanwhile, two rows of positioning rods limit the lateral movement of the workpiece 300, as shown in fig. 3 to 6, which are views of each viewing angle when the bending die is in a use state;

s102, the upper die 110 is pressed downwards, the upper die fixing plate 120 presses the compression spring 160 downwards and moves downwards along the guide post 140, the working surface of the upper punch 130 continues to be pressed downwards after contacting with the bending working surface 320, the ejecting spring 230 is compressed at the moment, and the lower die ejecting block 220 moves downwards into the bending groove 211 until the ejecting spring 230 is completely compressed;

s103, keeping the die assembly for a period of time, opening the die, enabling the ejection spring 230 and the compression spring 160 to rebound respectively, enabling the ejection spring 230 to send the bent workpiece to the bending groove 211, enabling the compression spring 160 to eject the upper die fixing plate 120 to the retainer ring 180, completing the die opening operation, and taking out the workpiece 300 to obtain a sheet metal part with a bending surface 310 and a bending working surface 320 forming an angle of 90 degrees, as shown in FIGS. 7 and 8;

and S104, repeating the steps, continuously processing the bent surface 310 on the other side, and finishing the processing of the sheet metal part with four bent surfaces.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a secondary bender based on U type sheet metal component, includes terrace die (130) and lower die (210), lower die (210) are equipped with bending groove (211), its characterized in that: the bending die is characterized in that a lower die ejector block (220) is arranged in a bending groove (211) of the lower female die (210) in a matched mode, the lower die ejector block (220) is fixedly connected with the bottom of the bending groove (211) through an ejector spring (230), wherein a working surface (221) of the lower die ejector block (220) is overlapped with the upper surface of the lower female die (210), and the lower die ejector block (220) can move downwards along with the bending of a workpiece (300) in a bending operation.

2. The secondary bender based on U-shaped sheet metal component according to claim 1, characterized in that: the upper surface of the lower female die (210) is provided with a positioning backup plate (250), one side, close to the lower die ejector block (220), of the positioning backup plate (250) is provided with a positioning groove (251), the bottom of the positioning groove (251) is the upper surface of the lower female die (210), and the shape of a cavity of the positioning groove (251) is matched with the shape and size of a surface to be bent on a workpiece (300).

3. The secondary bender based on U-shaped sheet metal component according to claim 2, characterized in that: and a row of positioning rods (240) are respectively arranged on two sides of the bending groove (211) and used for positioning the side surface of the workpiece (300).

4. The secondary bender based on U-shaped sheet metal component according to claim 3, characterized in that: the distance between the two rows of positioning rods (240) is equal to the width of the workpiece (300).

5. The secondary bender based on U-shaped sheet metal component according to claim 2, characterized in that: the upper surface of the positioning backup plate (250) is also fixedly provided with a positioning pin (252) for positioning the upper male die (130).

6. The secondary bender based on U-shaped sheet metal component according to claim 1, characterized in that: the die comprises an upper die fixing plate (120), a guide pillar (140) and a compression spring (160); the upper male die (130) is fixed at the bottom of the upper die fixing plate (120); one end of the guide post (140) is fixed on the lower concave die (210), and the other end of the guide post passes through the upper die fixing plate (120); a compression spring (160) is arranged between the lower concave die (210) and the upper die fixing plate (120), and the compression spring (160) is sleeved on the guide post (140).

7. The secondary bender based on U-shaped sheet metal component according to claim 6, characterized in that: a guide sleeve (150) is installed in the upper die fixing plate (120), and the guide pillar (140) penetrates through the guide sleeve (150).

8. The secondary bender based on U-shaped sheet metal component according to claim 7, characterized in that: a check ring (180) is fixed at the top of the guide post (140) through a locking bolt (170) to prevent the upper die fixing plate (120) from being separated from the guide post (140).

9. The secondary bender based on U-shaped sheet metal component according to claim 8, characterized in that: still include mould (110), go up mould fixed plate (120) and be fixed in mould (110) bottom, it is equipped with mould clamping part (111) to go up mould (110) top.

10. The secondary bender based on U-shaped sheet metal component according to any one of claims 1-9, characterized in that: the die also comprises a lower die holder (260) used for fixing the lower female die (210).

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