CN211135318U - Screw cold heading forming device - Google Patents

Abstract

The utility model discloses a screw cold heading processing and forming device, which comprises a frame, a head module, a punch module, a transfer mechanism and a tooth rolling mechanism are mounted on the frame; the head module includes a first die position and a second die position. Two die positions, the first die position is used to install the first die, and the second die position is used to install the second die; the punch module includes a first punch and a second punch matched with the first die and the second die respectively. Two punches; through the cooperation of the first punch and the first punch, a pier can be formed at one end of the blank, and through the cooperation of the second punch and the second die, another pier can be formed at the other end of the blank; The rubbing mechanism is connected to the output end of the second die position through a blanking channel, and is used for rubbing the blank; using the above-mentioned screw cold heading processing and forming device, only a complete processing process can be used to complete the blank. There is no need to replace the equipment in the middle of the piercing at both ends and the final tooth rolling work, which not only has low production cost, but also has high production efficiency.

Description

Screw cold heading forming device

technical field

The utility model relates to the technical field of screw forging processing equipment, in particular to a screw cold heading processing and forming device.

Background technique

A screw is a commonly used connector. The simplest screw structure includes a pier head and a screw rod. For screws used in some special occasions, such as furniture and equipment, two pier heads need to be formed at both ends of the screw rod. The teeth are rubbed on the side of one pier head, and some also need to be crossed on the upper end wall of the two pier heads. In order to achieve this purpose, in the processing technology of the screw, the cold pier machine is generally used to first process the blank into a blank with only one upsetting cross flower and a flat head, and then the blank is opened and closed by a mold opening and closing machine. The tail is upset with cross flowers, and finally the blank is rubbed and knurled with a tooth rolling machine. At present, the cold piercing machine on the market only uses cam top pressure to upset the tail, but it cannot be upset into a double-headed cross flower and knurling. For teeth, only one end of the blank can be upset with a single cross and two ends, and the end of the tail will be crooked. To form a pier, cross, and rubbing teeth at both ends, another mold clamping machine is required. 2. Another tooth rolling machine will upset the end of the blank with cross flowers and teeth, which cannot directly form a pier head or further mark the two ends of the blank through a cold heading machine, resulting in production costs. high and low production efficiency.

Utility model content

The purpose of this utility model is to solve the above-mentioned technical problems and provide a screw cold heading processing and forming device for upsetting the double heads of the screw blank into various required head shapes and rubbing the teeth.

In order to achieve the above purpose, the utility model discloses a screw cold heading processing and forming device, which comprises a frame on which a head module, a punch module, a transfer mechanism and a tooth rolling mechanism are installed; The die set is used to hold the blank to be processed, and the punch die set can reciprocate relative to the punching die to feed the blank into the punching die and hit the blank therein, so as to obtain the desired result. A head type is required; the head module includes a first die position and a second die position, the first die position is used to install the first punch, and the second die position is used to install the second punch; the punch The die set includes a first punch and a second punch which are respectively matched with the first die position and the second die position; through the cooperation of the first punch and the first punch, the blank can be One end forms a pier, and through the cooperation of the second punch and the second die, another pier can be formed at the other end of the blank; the transfer mechanism is used for transferring the blank to the blank according to the processing procedure. It is transferred between the stations; the tooth rolling mechanism is connected to the output end of the second die position through a blanking channel, so as to perform the tooth rolling operation on the blank.

Compared with the prior art, the screw cold heading processing and forming device of the present invention includes a first die position and a second die position in the head module set on the frame, and is provided with the same on the opposite side of the head module. When the first punch and the second punch are matched, the blank to be processed is first placed between the first punch and the first punch by the transfer mechanism, and then the first punch moves to the first punch to push the blank into the first punch. The first punch, and under the pushing force of the first punch, one end of the blank is punched into the desired structure in the first punch, and then the blank is pushed out of the first punch and then transferred by the transfer mechanism. Between the second punch and the second punch, the second punch pushes the blank into the second punch, and the other end of the blank is pierced to form a pier of the desired structure at the other end of the blank. Then, the blank with pier heads formed at both ends falls into the thread rolling mechanism through the blanking channel, and the thread rolling mechanism forms the screw with the required structure and with thread teeth after the thread is rubbed on the blank; A complete machining process on one piece of equipment can complete the piercing and final rubbing work on both ends of the billet, and there is no need to replace the equipment in the middle, which not only has low production cost, but also has high production efficiency.

Preferably, the first die position is located at the front end station of the second die position, and a baffle plate is provided on the side of the second die position opposite to the second punch, and the baffle plate is provided. There is a die that matches the head shape of the screw to be processed. After the second punch sends the blank into the second die, the rear end of the blank is formed in the die as The head of the pier.

Preferably, the baffle is also provided with a knife die, which is used to process a pattern on the pier head of the blank, and the baffle can reciprocate relative to the second die position. , to alternately align the die and the die to the second die.

Preferably, the frame is provided with a first drive mechanism that drives the baffle to reciprocate in the vertical direction, the first drive mechanism includes an upper link, a lower link and a drive frame, the drive frame It can move laterally reciprocatingly driven by the main transmission mechanism on the frame, the upper end of the upper link is connected with the baffle plate, and one end of the lower link is pivotally connected with the lower end of the upper link, The other end of the lower link is connected with the sliding block arranged in the driving frame, and the driving frame is also provided with a linkage mechanism connected with the sliding block. When the driving frame reciprocates, it can The sliding block is driven by the linkage mechanism to generate a lateral reciprocating motion.

Preferably, a long and narrow through slot is provided on the drive frame, the sliding block is installed in the through slot and can slide along the through slot, and a linkage rod is also arranged in the through slot, so One end of the linkage rod is connected with the sliding block, and the other end of the linkage rod passes through the drive frame and can slide relative to the drive frame. An elastic recovery piece is also sleeved on the moving rod, one end of the elastic recovery piece abuts with the boss, and the other end of the elastic recovery piece abuts with the drive frame.

Preferably, the heading module further comprises a third die position arranged at the front end station of the first die position, and the third die position is used to install a third punching die for reducing and stretching the blank; The punch die set includes a third punch arranged opposite to the third die position, and through the cooperation of the third punch and the third punch, the blank can be reduced and stretched.

Preferably, the frame is also provided with a feed slot for receiving wires required for processing screws and arranged laterally side by side with the third die position at the front end station of the third die position. The feeding slot is provided with a wire hole for the wire to pass through, and a shearing knife is provided in the feeding slot, and the shearing knife is used to cut the protruding part of the wire to form a blank.

Preferably, the shearing knife includes a plate member that can move in the feeding slot, and the plate member is provided with a knife hole for the wire to pass through. Knife holes on the plate cut off the protruding portion of the wire.

Preferably, the frame is further provided with a first ejector bar opposite to the feed slot, and the first ejector bar is used to limit the extension length of the wire rod.

Preferably, the transfer mechanism includes a frame-structured bracket disposed above the head module, the bracket is provided with a laterally slidable sliding plate, and the rack is provided with a sliding plate that can drive the sliding plate. For the second sliding drive mechanism, a plurality of freely openable and closable gripping claw pieces are arranged in parallel on the sliding plate, and the opening and closing of the gripping claw pieces is controlled by a third drive mechanism installed on the frame.

Preferably, the second punching die includes a movable die and a static die, and the movable die and the static die are respectively provided with a pair of joints for clamping the first punching die and the first punching die and the second punching die. A die cavity of a blank processed by a punch, a first through hole is opened on the side wall of the second die position, and the movable die is connected to the movable die through a connecting rod passing through the first through hole. A fourth driving mechanism on the frame is connected, and the fourth driving mechanism controls the movable mold to approach or move away from the static mold through the connecting rod.

Preferably, a plurality of second through holes are opened around the first through hole on the side wall of the second mold position, and a second ejector rod passes through each of the second through holes. A movable block is sleeved on the connecting rod, and the movable block can push the second ejector rod toward the second mold position under the action of the fourth driving mechanism.

Preferably, the movable block is also sleeved with a return spring.

Preferably, a first elastic thimble communicating with the cavity on the movable mold is provided on the side wall of the movable mold away from the static mold. When the movable mold is separated from the static mold , the first elastic thimble is pressed by the side wall of the second mold position to move into the mold position of the movable mold.

Preferably, a second elastic thimble that communicates with the mold position on the static mold is provided on the side wall of the static mold on the side away from the movable mold, and the top of the second elastic thimble is also A pressing rod fixed on the static mold is provided, and the pressing rod is used to press the second elastic thimble toward the mold position; Five drive mechanism.

Preferably, the tooth rolling mechanism includes a first washboard and a second washboard oppositely arranged, and a thread rolling channel for rolling the blank is formed between the first washboard and the second washboard, so The upper end of the thread rolling channel is also provided with a feeding channel that communicates with the thread rolling channel, the upper end of the feeding channel is communicated with the blanking channel, and the communication port between the feeding channel and the thread rolling channel A limiter is provided at the position, and the limiter is used to make the blanks enter the thread rolling channel in an orderly manner.

Preferably, the thread rolling channel and the feeding channel are communicated through a bending channel, and a push plate is also arranged in the bending channel, and the push plate can fall into the bending channel. The blank is pushed into the thread rolling channel.

Description of drawings

FIG. 1 is a schematic diagram of the assembly structure of a screw cold heading processing and forming device in an embodiment of the present invention.

2 is a schematic diagram of the installation positions of the head module and the punch module in the embodiment of the present invention.

FIG. 3 is a schematic three-dimensional structure diagram of the head module in FIG. 2 .

FIG. 4 is a schematic three-dimensional structure diagram of the baffle in FIG. 3 .

FIG. 5 is a schematic three-dimensional structure diagram of a first driving mechanism in an embodiment of the present invention.

FIG. 6 is a schematic three-dimensional structure diagram of a transfer mechanism in an embodiment of the present invention.

FIG. 7 is a schematic diagram of the back structure of FIG. 7 .

FIG. 8 is a schematic diagram of the matching structure of the transfer mechanism and the head module in the embodiment of the present invention.

FIG. 9 is a schematic three-dimensional structure diagram of a second punching die in an embodiment of the present invention.

FIG. 10 is a schematic view of the static die structure of the second die in FIG. 9 .

FIG. 11 is a schematic view of the movable die structure of the second punching die in FIG. 9 .

FIG. 12 is a schematic three-dimensional structure diagram of the tooth rolling mechanism in the embodiment of the present invention.

13a to 13e are schematic diagrams of forming structures of blanks in various processing steps in an embodiment of the present invention.

Detailed ways

In order to describe in detail the technical content, structural features, realization principle, realized objects and effects of the present invention, the following detailed description is given in conjunction with the embodiments and the accompanying drawings.

As shown in Figures 1 to 3 and Figures 13a to 13d, the utility model discloses a screw cold heading processing and forming device, which comprises a frame 1, and a head module 2 and a punch module are installed on the frame 1 3. Transfer mechanism 4 and tooth rolling mechanism 5. The punching module 2 is used to clamp the blank 100 to be processed, and the punching module 3 can reciprocate relative to the punching module 2 to feed the blank 100 into the punching module 2 and hit the blank 100 therein, so as to obtain the desired result. Need head type (such as flat head, round head, flat head, square head and hexagonal head, etc.). The head module 2 includes a first die position 20 and a second die position 21. The first die position 20 is used for installing the first punching die (not shown in the figure), and the second die position 21 is used for installing the second punching die 27 (as shown in FIG. 9 ). ), the specific selection of the first die and the second die 27 can be determined according to the required head shape. The punch die set 3 includes a first punch 30 and a second punch 31 which are matched with the first die position 20 and the second die position 21 respectively. One end of the blank 100 forms a pier, and through the cooperation of the second punch 31 and the second die 27 , another pier can be formed at the other end of the blank 100 . The transfer mechanism 4 is used to transfer the blank 100 between the stations according to the machining process. The thread rolling mechanism 5 is connected to the output end of the second die position 21 through a blanking channel 50, and is used to perform thread rolling operation on the blank 100 to form the thread teeth 103 on the blank. In addition, in this embodiment, power support is provided for the punch die set 3 , the transfer mechanism 4 and the tooth rolling mechanism 5 through the motor and the gear transmission mechanism.

The working principle of the above-mentioned screw cold heading forming device is as follows: the first die and the second die 27 of the desired head shape are loaded into the first die position 20 and the second die position 21 respectively, and then the equipment is started, and the blank 100 is removed. The transfer mechanism 4 is placed between the first die and the first punch 30 , and then the first punch 30 moves to the first punch to push the blank 100 into the first punch, and the first punch 30 pushes the force Next, in the first die, one end of the blank 100 is punched into a pier head of the desired structure, and then the blank 100 is pushed out of the first die and then transferred by the transfer mechanism 4 to between the second die 27 and the second punch 31 At the same time, the transfer mechanism 4 feeds the first punch, and then the second punch 31 pushes the blank 100 into the second punch 27, and punches the blank 100 entering the second punch 27. The other end forms a pier head with a desired structure, and then, the blank 100 with the pier head formed at both ends falls into the tooth rolling mechanism 5 through the blanking channel 50, and the tooth rolling mechanism 5 rubs the blank 100 to form the required teeth. It can be seen from the above processing process that through a complete processing process on one piece of equipment, the piercing and final rolling of the two ends of the blank 100 can be completed, and there is no need to replace the equipment in the middle. Not only the production cost is low, but also the production efficiency is high. In addition, it should be noted that the backs of the first punch die and the second punch die 27 are respectively provided with an ejector mechanism that is drivingly connected to the gear transmission mechanism on the frame 1, and the blank 100 is ejected from the first punch die and the second punch through the ejection mechanism. 27 ejection, the specific setting of the ejection mechanism is common knowledge in the field, and will not be described in detail here.

In order to improve work efficiency, as shown in FIGS. 2 to 4 , the first die 20 is located at the front end of the second die 21 , and a baffle 33 is provided on the opposite side of the second die 21 to the second punch 31 . That is, the baffle 33 and the second punch 31 are located on opposite sides of the second die position 21, respectively, and the baffle 33 is provided with a die 330 that is adapted to the head shape of the screw to be processed. After the head 31 pushes the blank 100 into the second die 27 , the rear end of the blank 100 is formed into the pierced head in the die 330 . In this embodiment, the blank 100 is formed at the first die position 20 to form a first pier 101 at one end of the blank 100 (as shown in FIG. 13c ). The first pier 101 is located on the side close to the first punch 30, and then When the blank 100 with the first pier 101 is transferred to the second die position 21 by the transfer mechanism 4, it is not necessary to reverse the direction of the blank 100, and the end of the blank 100 different from the first pier 101 is close to the second Die 27, the second punch 31 pushes the blank 100 into the second die 27, when the blank 100 is in contact with the die 330 on the baffle 33, the other end of the blank 100 is struck by the second punch 31 The second head 102 is formed in the form 330 (as shown in Figure 13d). Therefore, with the above-mentioned configuration, the transfer mechanism 4 does not need to change the direction when transferring the blank 100 , which simplifies the transfer mechanism 4 and improves the production efficiency.

In order to facilitate the installation of screws, as shown in Figure 13d, for a screw with two pier heads, a pattern 103 will be processed on one of the pier heads, such as inline, cross, plum blossom 103, hexagon socket, triangle, etc. Therefore, Preferably, as shown in FIG. 4 , a knife die 331 can be installed on the baffle plate 33 in the above embodiment, and the knife die 331 is used to process a pattern 103 on the head of the blank 100 , and the baffle plate 33 can be Reciprocating relative to the second die position 21 to alternately align the cutter die 331 and the die 330 with the second punch die 27 . After the blank 100 is fed into the second die 27 , the rear end of the blank 100 is first punched in the die 330 to form the second pier head 102 , and then through the movement of the baffle 33 , the die 331 is aligned with the second die 27, and then again by the hitting of the second punch 31, the second pier 102 is in contact with the die 331, so that the pattern 103 corresponding to the die 331 is formed on the second pier 102.

Regarding the drive arrangement for the reciprocating motion of the baffle 33, preferably, the frame 1 is provided with a first drive mechanism that drives the baffle 33 to reciprocate in the vertical direction, as shown in FIGS. 1 and 5, the first drive mechanism includes The upper connecting rod 60, the lower connecting rod 61 and the driving frame 62, the driving frame 62 can reciprocate laterally under the driving of the gear transmission mechanism on the frame 1, the upper end of the upper connecting rod 60 is connected with the baffle plate 33, and the lower connecting rod 61 One end of the lower link 61 is pivotally connected to the lower end of the upper link 60, and the other end of the lower link 61 is connected to the sliding block 63 arranged in the driving frame 62. The driving frame 62 is also provided with a linkage mechanism connected to the sliding block 63. When When the drive frame 62 reciprocates, the sliding block 63 can be driven to generate a lateral reciprocating motion through the linkage mechanism. Preferably, a long and narrow through slot 64 is provided on the drive frame 62, the sliding block 63 is installed in the through slot 64 and can slide along the through slot 64, and a linkage rod 65 is also arranged in the through slot 64, and the linkage rod 65 One end of the connecting rod 65 is connected with the sliding block 63, and the other end of the link rod 65 passes through the drive frame 62 and can slide relative to the drive frame 62. A boss 66 is set on the link rod 65, and an elastic recovery is also set on the link rod 65. One end of the elastic restoring member 67 is in contact with the boss 66 , and the other end of the elastic restoring member 67 is in contact with the driving frame 62 . The working principle of the above-mentioned first drive mechanism is: after the drive motor on the frame 1 is turned on, driven by the gear transmission mechanism, the drive frame 62 reciprocates in the lateral direction, and the lateral movement of the drive frame 62 will cause the drive frame 62 to move. The deformation amount of the elastic restoring member 67 changes, so that the elastic restoring member 67 generates a pushing or pulling force on the linking rod 65 through the boss 66 on the linking rod 65, and then the linking rod 65 drives the sliding block 63 on the driving frame 62. The upper lateral sliding, the reciprocating sliding of the sliding block 63 further causes the two ends of the lower link 61 to be tilted alternately, so that the lower link 61 drives the upper link 60 to move up and down, and finally drives the baffle 33 to move up and down, so that the The die 330 and the die 331 are alternately aligned with the second die 27 .

Further, as shown in FIG. 2 and FIG. 3 , the head module 2 further includes a third die position 22 arranged at the front end station of the first die position 20 , and the third die position 22 is used to install a device for reducing and stretching the blank 100 . The third die (not shown). The punch module 3 includes a third punch 32 disposed opposite to the third die position 22 , and the blank 100 can be reduced and stretched by the cooperation of the third punch 32 and the third punch. When starting the operation, firstly, the cut blank 100 is placed between the third die and the third punch 32 through the transfer mechanism 4, and the blank 100 is pushed into the third punch by the third punch 32, so that the blank 100 is inserted into the third punch. The blank 100 is stretched and reduced, and a tip 105 is formed near the end where the third punch 32 is located.

Further, please refer to FIG. 1, FIG. 2 and FIG. 3 again, the frame 1 is also provided with a front-end station of the third mold position 22 and the third mold position 22 for receiving processing screws. The feeding slot 23 for the wire is provided with a wire hole 230 for the wire to pass through. 100 (see Figure 13a). In this embodiment, the wire hole 230 is provided on the rear wall of the feeding chute 23 , and the rack 1 is provided with a conveying channel 12 behind the feeding chute 23 for conveying the wire material to the feeding chute 23 , and the wire material passes through the conveying channel 12 Enter the feed slot 23, and then protrude from the wire hole 230 of the feed slot 23. After extending for a certain length, the protruding part is cut off by a shearing knife to become the blank 100 for processing the screw. Preferably, the shearing knife includes a plate 24 that can move in the feeding slot 23. The plate 24 is provided with a knife hole 25 for the wire to pass through. When threading, the knife hole 25 coincides with the wire hole 230. When the plate member 24 moves, the protruding part of the wire is cut off through the knife hole 25 on the plate member 24 . When the wire sticks out of the knife hole 25 for a certain length, the plate 24 can move up, so that the protruding wire is cut off through the knife hole 25 on the plate 24 and attached to the plate 24 . Preferably, the frame 1 is further provided with a first ejector rod 26 opposite to the feed slot 23 , and the first ejector rod 26 is used to limit the extension length of the wire. When the wire extends forward from the feed slot 23 to the first ejector rod 26, it abuts against the first ejector rod 26, thereby restricting the further extension of the wire rod. For screws of different lengths, the first ejector rod 26 can be adjusted. The distance between the free end and the feed chute 23.

Regarding the installation structure of the head module 2, the punch module 3 and other related mechanisms in the above-mentioned embodiment, specifically, as shown in FIGS. 1 and 2, a base 10 is installed at one end of the frame 1, and the base 10 is arranged in sequence. Four grooves are arranged side by side, which are respectively used for the feeding slot 23, the third die position 22, the first die position 20 and the second die position 21. The punch module 3 is installed on the opposite side of the base 10, and the third punch The head 32 is opposite to the third die position 22 , the first punch 30 is opposite to the first die position 20 , the second punch 31 is opposite to the second die position 21 , and the first ejector pin 26 is opposite to the feed slot 23 . When one end of the blank 100 is to be processed to form the pier head and the pattern 103 at the same time, the blank 100 needs to be hit twice at the second die position 21, causing the second punch 31 and the third punch 32 and the first punch. The working sequence of 30 is different. Therefore, the third punch 32 is fixed with the first punch 30 and moves back and forth relative to the base 10, while the second punch 31 reciprocates independently. In order to achieve this purpose, the gear transmission mechanism It includes a first transmission shaft 11 arranged on the frame 1, an eccentric wheel 110 and a first cam 111 are mounted on the first transmission shaft 11, and the eccentric wheel 110 is connected with the third punch 32 and the first punch 30 , which drives the third punch 32 and the first punch 30 to reciprocate. The second punch 31 is mounted on a fixed block 34, and a reset member (such as a spring) can also be installed between the fixed block 34 and the base 10, and the second punch 31 is driven to face each other through the cooperation of the first cam 111 and the reset member. The second die 21 reciprocates.

In another preferred embodiment of the screw cold heading processing and forming device of the present invention, as shown in FIGS. 6 to 8 , the transfer mechanism 4 includes a bracket 40 in a frame structure disposed above the head module 2, and a bracket 40 is provided on the bracket 40. The sliding plate 41 that can slide laterally, the frame 1 is provided with a second driving mechanism that can drive the sliding plate 41 to slide, and the sliding plate 41 is laterally provided with a number of freely openable and closable gripping claw pieces 43. The opening and closing of the gripping claw pieces 43 A third drive mechanism mounted on frame 1 controls. Since in the above-mentioned embodiment, the frame is provided with three stations for feeding, reducing, first-piercing and second-piercing, therefore, in this embodiment, three gripping claw pieces 43 are arranged side by side on the sliding plate 41, For the convenience of description, the three clamping jaws are named as the first clamping jaw 430, the second clamping jaw 431 and the third clamping jaw 432 respectively. During operation, the sliding plate 41 slides along the bracket 40 under the driving of the second driving mechanism, so that the first clamping jaw 41 slides along the bracket 40. A clamping jaw 430 is located at the feed slot 23, a second clamping jaw 431 is located at the third die position 22, the third clamping jaw 432 is located at the first die position 20, and then the first clamping jaw 430 and the second clamping jaw 431 The blank 100 is opened at the same time as the third jaw 432 and grips the blank 100. Then, in cooperation with the sliding of the slide plate 41, the first jaw 430 transfers the blank 100 cut from the feed slot 23 to the third die position 22. The clamping jaw 431 transfers the stretched blank 100 at the third die position 22 to the first die position 20, and the third clamping jaw 432 transfers the blank 100 after one punch to the second die position 21, so as to This continuous cycle completes the transfer of the blank 100 . As for the second drive mechanism, as shown in FIG. 1 and FIG. 6 , it includes a second transmission shaft 420 , a second cam 421 and a link rod mechanism. The second transmission shaft 420 is drivingly connected with the first transmission shaft 11 , and the second transmission shaft 420 Installed on a pair of mounting plates 423 on one side of the frame 1, the second cam 421 is installed on the second transmission shaft 420, one end of the link mechanism 422 is connected with the slide plate 41 on the bracket 40, and the other side of the link mechanism 422 One end is installed at the second cam 421, and the sliding plate 41 is driven to reciprocate through the intermittent control of the link mechanism 422 by the second cam 421. The link mechanism 422 specifically includes a first link 424 and a second link 425 . The first link 424 is connected to the sliding plate 41 , and the second link 425 is installed on the second cam 421 between the two mounting plates 423 . The lower end of the second link 425 is pivotally connected to one of the mounting plates 423, the upper end of the second link 425 is pivotally connected to the first link 424, and the upper end of the second link 425 is slidably mounted on a pair of sliding The rod 426 and the sliding rod 426 are sleeved with a return spring, and through the cooperation of the second cam 421 and the return spring, the second transmission shaft 420 drives the sliding plate 41 to reciprocate along the bracket 40 through the link structure.

As shown in FIG. 6 , each gripper 43 in the above-mentioned embodiment includes a movable claw 433 and a stationary claw 434 , and the third driving mechanism can realize the opening and closing control of the gripping claw by driving the action of the movable claw 433 , specifically 7, the third drive mechanism includes a rotating block 440 connected to each movable claw 433 and a top plate 441 opposite to each rotating block 440 provided on the back of the sliding plate 41, the middle of the top plate 441 passing through a rotating shaft 442 On the back of the bracket 40, a support arm 443 is provided, and a drive shaft 444 is installed on the support arm 443. The drive shaft 444 is provided with third cams 445 corresponding to the three top plates 441 respectively. When the drive shaft 444 rotates, it can be The third cam 445 intermittently interferes with the rear end of the top plate 441 , so that the front end of the top plate 441 is lifted upwards, so that the rotating block 440 is rotated, and finally the purpose of rotating the movable claw 433 is achieved.

In another preferred embodiment of the screw cold heading processing and forming device of the present invention, as shown in FIGS. 9 to 11 , the second die 27 includes a movable die 270 and a static die 271. The movable die 270 and the static die 271 are respectively provided with adjustable A pair of cavities 272 for holding the blank 100 processed by the first die and the first punch 30 . In order to facilitate the control of the opening and closing of the second die 27, please refer to FIG. 1 and FIG. 8 in combination, the side wall of the second die 21 is provided with a first through hole 76, and the movable die 270 passes through the first through hole. The connecting rod 70 of 76 is connected with the fourth driving mechanism arranged on the frame 1. In the middle of this embodiment, the connecting rod 70 is screwed with the movable mold 270, and the fourth driving mechanism controls the movable mold 270 to approach or move away from the static mold through the connecting rod 70. Mod 271. Preferably, the fourth driving mechanism includes a fourth cam 71 disposed on the second transmission shaft 420 , and the connecting rod 70 is pushed into the second mold position 21 by the fourth cam 71 . Preferably, a plurality of second through holes 72 are formed around the first through hole 76 on the side wall of the second die position 21 , and a second push rod 73 is passed through each second through hole 72 , and the connecting rod 70 The upper sleeve is provided with a movable block 74 , and the movable block 74 can push the second ejector rod 73 to the second die position 21 under the action of the fourth driving mechanism. In order to facilitate the reset of the movable block 74 , a return spring is also sleeved on the movable block 74 . When the blank 100 enters the second die 27 , the fourth cam 71 pushes the connecting rod 70 and the movable block 74 toward the second die position 21 , so that the connecting rod 70 and the second ejector rod 73 push the connecting rod 70 and the second ejector rod 73 into the second die 27 . The movable die 270 moves to the static die 271, so that the two are close together. After the pier work is completed, the movable block 74 is reset by the elastic restoring force of the reset spring sleeved on the movable block 74, and the reset of the movable block 74 It will drive the connecting rod 70 to reset, so that the movable mold 270 is pulled back through the connecting rod 70 and separated from the static mold 271 .

Regarding the second die 27, for further improvement, please refer to FIGS. 9 to 11 again. The side wall of the movable die 270 away from the static die 271 is provided with a first elastic ejector pin 273 that communicates with the cavity 272 on the movable die 270. , when the movable mold 270 is separated from the static mold 271, the first elastic ejector pin 273 is pressed by the side wall of the second mold position 21 to move into the mold cavity 272 of the movable mold 270; The side wall is provided with a second elastic thimble 274 that communicates with the cavity 272 on the static mold 271, and the top of the second elastic thimble 274 is also provided with a pressing rod 275 fixed on the static mold 271. The pressing rod 275 is used for The second elastic ejector pin 274 is pressed toward the mold cavity 272; the frame 1 is provided with a fifth driving mechanism (not shown) connected with the pressing rod 275. In this embodiment, when the second die 27 is opened, the blank 100 is pushed out of the cavity 272 by the first elastic thimble 273 and the second elastic thimble 274 on the movable die 270 and the static die 271, so as to prevent the blank 100 from sticking to the cavity 272. in cavity 272.

Regarding the tooth rolling mechanism 5 , preferably, as shown in FIG. 12 , the tooth rolling mechanism 5 includes a first washboard 51 and a second washboard 52 that are oppositely arranged, and the first washboard 51 and the second washboard 52 are formed between the first washboard 51 and the second washboard 52 for rubbing the blank 100 . The thread rolling channel 53 for thread rolling, the upper end of the thread rolling channel 53 is also provided with a feeding channel 54 that communicates with the thread rolling channel 53, the upper end of the feeding channel 54 is communicated with the blanking channel 50, and the feeding channel 54 is connected with the thread rolling channel. A limiter 55 is provided at the communication port of 53 , and the limiter 55 is used to make the blanks 100 enter the thread rolling channel 53 in an orderly manner. In this embodiment, the limiter 55 disposed at the end of the feeding channel 54 can prevent multiple blanks 100 after beating from entering the thread rolling channel 53 at the same time, so as to ensure the thread rolling quality. Further improvement, the thread rolling channel 53 and the feeding channel 54 are communicated through a bending channel 56, and a push plate 57 is also arranged in the bending channel 56, and the push plate 57 can push the blank 100 falling into the bending channel 56. into the thread rolling channel 53. The setting of the bending channel 56 further ensures that the blanks 100 individually enter the thread rolling channel 53 in sequence. Specifically, the push plate 57 is in driving connection with the gear transmission mechanism on the frame 1 , and the gear transmission mechanism drives the push plate 57 to reciprocate in an orderly manner. In addition, the limiting member 55 also has a reset function, and a third ejector rod 58 can be arranged on the push plate 57 . When the push plate 57 moves to the feeding channel 54 , the third ejector rod 58 abuts against the limiting member 55 . , so that the limiter 55 opens the feeding channel 54, the blank 100 enters the bending channel 56, and then with the further movement of the third ejector rod 58, the blank 100 is pushed into the thread rolling channel 53, when the push plate 57 returns, The limiter 55 is automatically reset.

To sum up, as shown in Fig. 1 to Fig. 13e, the specific working process of the screw cold heading forming device disclosed in the above-mentioned embodiment is as follows: first, the wire rod is inserted into the conveying channel 12 on the frame 1, and the wire rod is sent by the conveying channel 12. into the feeding chute 23 at the front end, and pass through the front end of the feeding chute 23 until it abuts with the first ejector rod 26 , and then the plate 24 in the feeding chute 23 moves up and passes through the knife hole in the plate 24 25 Cut off the protruding part of the wire to form a blank 100 for machining screws (as shown in Figure 13a), and then the transfer mechanism 4 is activated to transfer the blank 100 between the third die 22 and the third punch 32, and then the third The punch 32 moves to the third die position 22 to push the blank 100 into the third punch. An end head 105 is formed at one end (as shown in Figure 13b), and then the blank 100 is ejected by the ejection mechanism at the rear end of the third die. After the blank 100 is ejected, it is moved to the first die position 20 and the first punch 30 by the transfer mechanism 4 Then, the first punch 30 moves to the first die position 20 to push the blank 100 into the first punch. One end forms a first pier 101 (as shown in Figure 13c), and then the blank 100 is ejected from the first die, and transferred by the transfer mechanism 4 to between the second die 27 and the second punch 31, and then the second punch The head 31 moves to the second die 27 to push the blank 100 into the second die 27, and then through the cooperation of the second punch 31, the second die 27 and the die 330 on the baffle 33 at the rear end of the second die 27, A second head 102 is formed at the other end of the blank 100 (as shown in FIG. 13d ), and then the baffle 33 is moved down, so that the die 331 on the baffle 33 faces the second head 102 at the rear end of the second die 27 , and then, with With the second punch 31 hitting again, a pattern 103 is formed on the second pier 102 (as shown in FIG. 13d ); then, after the pier is formed, the blank 100 falls into the blanking channel 50 and enters through the blanking channel 50 Feeding channel 54, then the limiter 55 at the end of the feeding channel 54 is opened, the blank 100 is pushed into the thread rolling channel 53 by the push plate 57, the thread rolling of the blank 100 is completed, and the wire teeth 104 are formed on the first pier 101. (Fig. 13e), thus completing the processing of the screw.

What is disclosed above is only a preferred example of the present invention, of course, it cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still belong to the scope covered by the present invention. .

Claims (17)

1. The screw cold heading forming device is characterized by comprising a rack, wherein a heading module, a punch module, a transfer mechanism and a thread rolling mechanism are arranged on the rack;

the punching head module is used for clamping a blank to be processed, and the punch head module can reciprocate relative to the punching head module so as to send the blank into the punching head module and punch the blank therein, so that a required head shape is obtained;

the heading die set comprises a first die position and a second die position, wherein the first die position is used for mounting a first punching die, and the second die position is used for mounting a second punching die;

the punch die set comprises a first punch and a second punch which are matched with the first die position and the second die position respectively;

a pier head can be formed at one end of the blank through the matching of the first punch and the first die, and another pier head can be formed at the other end of the blank through the matching of the second punch and the second die;

the transfer mechanism is used for transferring the blank among the stations according to the processing procedure;

and the thread rolling mechanism is butted with the output end of the second die position through a blanking channel and is used for performing thread rolling operation on the blank.

2. The screw cold heading forming device according to claim 1, wherein the first die position is located at a front end station of the second die position, a baffle plate is arranged on a side of the second die position opposite to the second punch, a die matched with a head shape of the screw to be processed is arranged on the baffle plate, and after the second punch feeds the blank into the second die, a rear end of the blank is formed into a butted head in the die.

3. The screw cold heading forming device according to claim 2, wherein a cutting die is further disposed on the baffle plate, the cutting die is used for machining a pattern on the pier head of the blank, and the baffle plate can reciprocate relative to the second die position to alternately align the cutting die and the forming die with the second punching die.

4. The screw cold heading forming device according to claim 3, wherein the frame is provided with a first driving mechanism for driving the baffle to reciprocate in a vertical direction, the first driving mechanism comprises an upper connecting rod, a lower connecting rod and a driving frame, the driving frame can reciprocate transversely under the driving of a main transmission mechanism on the frame, the upper end of the upper connecting rod is connected with the baffle, one end of the lower connecting rod is pivoted with the lower end of the upper connecting rod, the other end of the lower connecting rod is connected with a sliding block arranged in the driving frame, the driving frame is further provided with a linkage mechanism connected with the sliding block, and when the driving frame reciprocates, the linkage mechanism can drive the sliding block to reciprocate transversely.

5. The cold-heading forming device for the screw according to claim 4, wherein the driving frame is formed with a long and narrow through slot, the sliding block is mounted in the through slot and can slide along the through slot, the through slot is further provided with a linkage rod, one end of the linkage rod is connected with the sliding block, the other end of the linkage rod passes through the driving frame and can slide relative to the driving frame, the linkage rod is provided with a boss, the linkage rod is further sleeved with an elastic restoring member, one end of the elastic restoring member abuts against the boss, and the other end of the elastic restoring member abuts against the driving frame.

6. The screw cold heading forming device according to claim 1, wherein the heading die set further comprises a third die position arranged at the front end station of the first die position, and the third die position is used for installing a third punch die for reducing and stretching the blank; the punch die set comprises a third punch which is arranged opposite to the third die position, and the blank can be subjected to reduction drawing operation through the matching of the third punch and the third die.

7. The screw cold heading forming device according to claim 6, wherein a feed chute arranged transversely and side by side with the third die position and used for receiving a wire rod required for processing a screw is further arranged on the frame at the front end station of the third die position, a wire hole for the wire rod to pass through is formed in the feed chute, and a shearing knife is arranged in the feed chute and used for shearing the part of the wire rod extending out to form a blank.

8. The screw cold heading forming device according to claim 7, wherein the shearing blade includes a plate movable in the feed chute, and a blade hole is formed in the plate for the wire to pass through, and when the plate is moved, the protruding portion of the wire is sheared off through the blade hole in the plate.

9. The screw cold heading forming device according to claim 7, wherein a first ejector pin is further provided on the frame opposite to the feed chute, the first ejector pin being for limiting the protruding length of the wire.

10. The screw cold heading forming device according to claim 1, wherein the transfer mechanism includes a frame-shaped support disposed above the heading module, the support is provided with a sliding plate capable of sliding laterally, the frame is provided with a second driving mechanism capable of driving the sliding plate to slide, the sliding plate is provided with a plurality of freely openable and closable jaw members laterally, and the opening and closing of the jaw members are controlled by a third driving mechanism mounted on the frame.

11. The cold-heading forming device for the screw according to claim 1, wherein the second die comprises a movable die and a stationary die, the movable die and the stationary die are respectively provided with a die cavity which can be aligned together for clamping the blank processed by the first die and the first punch, the side wall of the second die position is provided with a first through hole, the movable die is connected with a fourth driving mechanism arranged on the frame through a connecting rod passing through the first through hole, and the fourth driving mechanism controls the movable die to approach or depart from the stationary die through the connecting rod.

12. The screw cold heading forming device according to claim 11, wherein a plurality of second through holes are formed in the side wall of the second die position around the first through hole, a second ejecting rod penetrates through each second through hole, a movable block is sleeved on the connecting rod, and the movable block can push the second ejecting rod towards the second die position under the action of the fourth driving mechanism.

13. The screw cold heading forming device according to claim 12, wherein the movable block is further sleeved with a return spring.

14. The screw cold heading forming device according to claim 11, wherein a first resilient pin communicating with the cavity of the movable die is provided on a side wall of the movable die on a side thereof away from the stationary die, and when the movable die is separated from the stationary die, the first resilient pin is pressed by a side wall of the second die position to move into the die position of the movable die.

15. The screw cold heading forming device according to claim 11, wherein a second elastic thimble communicated with a die position on the stationary die is provided on a side wall of the stationary die on a side away from the movable die, and a pressing rod fixed on the stationary die is further provided on a top of the second elastic thimble, and the pressing rod is used for pressing the second elastic thimble toward the die position; and a fifth driving mechanism connected with the pressure lever is arranged on the rack.

16. The screw cold heading forming device according to claim 1, wherein the thread rolling mechanism includes a first thread rolling plate and a second thread rolling plate which are arranged oppositely, a thread rolling channel for rolling the blank is formed between the first thread rolling plate and the second thread rolling plate, a feeding channel communicated with the thread rolling channel is further arranged at an upper end of the thread rolling channel, the upper end of the feeding channel is communicated with the blanking channel, a limiting member is arranged at a communication port of the feeding channel and the thread rolling channel, and the limiting member is used for enabling the blank to enter the thread rolling channel in order.

17. The screw cold heading forming device according to claim 16, wherein the thread rolling channel is communicated with the feeding channel through a bending channel, and a push plate is further arranged in the bending channel and can push the blank falling into the bending channel into the thread rolling channel.

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