A folding and shearing device for a PIN folding machine and a PIN folding machine

Abstract

The present invention discloses a folding and shearing device for a pin folding machine, comprising: a bracket, a pin track, a stepping mechanism, a bending mechanism, and a shearing mechanism. The bracket supports the pin track, the bending mechanism, the shearing mechanism, and the stepping mechanism; the pin track transports pins; the stepping mechanism drives the pins in the pin track to gradually advance; the bending mechanism bends the pins into a predetermined shape; and the shearing mechanism shears off excess material after the pins are bent to the predetermined shape. The present invention provides a stepping mechanism that strictly controls the movement pitch of the pins in the pin track according to the pin's external dimensions. The stepping mechanism, in conjunction with the bending and shearing mechanisms, ensures consistent movement pitch, stable and reliable operation, and effectively improves the quality and pass rate of pin folding. Furthermore, the device features simple configuration and facilitates automated operation.

Description

Technical Field

[0001] The present invention relates to a PIN processing device, in particular to a folding and shearing device for a PIN folding machine and the PIN folding machine. Background Art

[0002] PIN, a metal material used to transmit electrical signals, is widely used in military, aerospace, mechanical processing, metallurgy, oil drilling, mining tools, electronic communications and other fields. With the continuous development and progress of science and technology, especially electronic technology, the market demand is growing, and the demand for PIN is also increasing. In this context, how to improve the processing efficiency of PIN has always been a research hotspot for technicians.

[0003] In existing technology, PIN bending, while simple, is mostly performed manually. Due to the high demand for PIN bending, some manufacturers have begun to experiment with creating efficient PIN bending machines. To achieve this goal, two processes are required: loading and PIN bending. The PIN bending process involves bending the PIN into a predetermined shape and trimming any excess length, which is the core process of the PIN bending machine. However, due to the large number of PINs, the small size of the mother PIN body, and the fineness of the PIN pins, finding a simple and quick way to control the movement and stopping of the PINs during the feeding process, achieving efficient and quick PIN bending and cutting, and coordinating the movement and stopping of the PINs with the bending and cutting action have long been challenges for those skilled in the art.

[0004] Therefore, in this technical field, there is an urgent need for a folding and shearing device with simple configuration, convenient operation and adjustment, and efficient shearing. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention proposes a folding and shearing device with simple configuration, convenient operation and adjustment, continuous production, stable and reliable folding and shearing quality, and fast and efficient operation.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] On the one hand, the present invention discloses a folding and shearing device for a PIN folding machine, comprising: a bracket, a row PIN track, a stepping mechanism, a bending mechanism and a shearing mechanism, wherein the bracket is arranged at the bottom and is used to support the row PIN track, the bending mechanism, the shearing mechanism and the stepping mechanism; the row PIN track is constructed as a strip track laid and fixed on the bracket for conveying PINs, the PIN comprises a mother PIN body and a PIN needle connected to the mother PIN body, the row PIN track comprises a left guard plate and a right guard plate, the left guard plate and the right guard plate are parallel to each other, and the gap between the left guard plate and the right guard plate constitutes a channel for passing PINs, the side surface of the left guard plate is provided with a strip hole or the side surface of the right guard plate is provided with a strip hole The holes or the corresponding positions of the left and right guard plates are provided with strip holes, and the length of the strip holes is greater than the outer diameter of the PIN; the two ends of the PIN entry and exit of the row PIN track are the feeding end and the discharging end respectively; the stepping mechanism is arranged between the feeding end of the row PIN track and the bending mechanism, and is used to drive the PIN in the row PIN track to advance gradually; the bending mechanism is symmetrically arranged on both sides of the row PIN track along the length direction of the row PIN track, and is used to bend the PIN needle into a predetermined shape; the shearing mechanism is arranged on the left or right side of the row PIN track or on the left and right sides of the row PIN track, and is cooperated with the bending mechanism to shear off the excess material after the PIN needle is bent to a predetermined shape.

[0008] The beneficial effects of adopting the above technical solution are: fully considering the problems in the prior art that the bending and shearing of the PIN are completed independently, the movement and stop control of the PIN is complicated, and the coordination with the folding and shearing operations is unstable. By setting a stepping mechanism, the movement step of the PIN in the PIN track is strictly controlled according to the external dimensions of the PIN, and it is effectively coordinated with the bending mechanism and the shearing mechanism. The movement step is consistent, stable and reliable, and the quality and pass rate of the folded PIN are effectively improved. In addition, the equipment configuration is simple and it is easy to realize automated operation, which improves production efficiency while significantly saving costs.

[0009] As a further improvement of the present invention, the row PIN track further includes a sealing component, which is arranged at the discharge end of the row PIN track to prevent the PIN from automatically sliding out of the row PIN track.

[0010] The beneficial effect of adopting the above technical solution is that the setting of the sealing component can effectively prevent the PIN from automatically sliding out of the PIN track during the folding and shearing process or in an uncontrolled state, especially for the PIN track arranged in the vertical direction, its effect is more prominent.

[0011] As a further improvement of the present invention, the row PIN track is laid in the vertical direction, the sealing assembly is a magnetic retaining ring, and the magnetic retaining ring includes a left ring and a right ring. The left ring and the right ring are respectively rotated with the ends of the left guard plate and the right guard plate, and the contact surfaces of the left ring and the right ring are embedded with different magnetic elements.

[0012] The beneficial effects of adopting the above technical solution are: using the magnetic ring as the sealing component, it fully utilizes the magnetic effect and the characteristics of the ring-shaped objects automatically resetting under the action of gravity, and has a long service life and is stable and reliable; on the other hand, the magnetic retaining ring has a simple structure and is easy to maintain.

[0013] As a further improvement of the present invention, corresponding positions of the left guard plate and the right guard plate are provided with strip holes; the stepping mechanism includes a stepping knife and a telescopic drive unit; the stepping knife is perpendicular to the length direction of the row PIN track and aligned with the strip hole, the insertion end of the stepping knife is in the shape of a right triangle, and the hypotenuse of the insertion end faces the discharge end of the row PIN track, and the maximum width of the insertion end is equal to the outer diameter of the PIN; the telescopic drive unit is connected to the other end of the stepping knife.

[0014] The beneficial effects of adopting the above technical solution are: the setting of the stepping knife and the telescopic drive unit, on the one hand, uses the width of the stepping knife as the stepping length, which is simple and reliable, and effectively ensures the consistency of the progressive distance of each PIN during the folding and shearing process; on the other hand, each extension of the stepping knife into the PIN row track provides a forward driving force for the stepping of the PIN, and also provides an opening force for opening the sealing assembly of the PIN row track.

[0015] As a further improvement of the present invention, the bending mechanism includes a bending mold, a first resetting element, a first transmission assembly and a driving mechanism; the bending mold includes a left bending mold and a right bending mold, and the left bending mold and the right bending mold are symmetrically arranged along the length direction of the row PIN track, and are respectively connected to the driving mechanism through the first transmission assembly; one end of the first resetting element is connected to the bending mold, and the other end is connected to the bracket.

[0016] The beneficial effects of adopting the above technical solution are: the introduction of the bending die into the bending mechanism effectively expands the application scope of the folding and shearing device. When it is necessary to bend PINs of different shapes, it is only necessary to replace the bending die to meet the diverse usage requirements, greatly reducing the number of matching folding and shearing devices and saving equipment procurement costs.

[0017] As a further improvement of the present invention, the shearing mechanism includes a shearing tool, a second resetting element and a second transmission assembly; the shearing tool is matched with the bending left mold or the bending right mold, and is used to shear the residual material after the PIN needle is bent to a predetermined shape, and is connected to the driving mechanism through the second transmission assembly; one end of the second resetting element is connected to the shearing tool, and the other end is connected to the bracket.

[0018] The beneficial effect of adopting the above technical solution is that the shearing tool is arranged in conjunction with the bending die, which helps to complete the residual material shearing action while bending the PIN, effectively shortens the unit processing time of the PIN, makes the process arrangement more compact, and effectively improves production efficiency.

[0019] As a further improvement of the present invention, the driving mechanism includes two main transmission shafts, which are respectively configured to correspond to the left bending mold and the right bending mold. The first transmission assembly includes a first cam and a first follower that cooperates with the first cam for transmission. The first cam is fixed on the main transmission shaft, and the first follower is connected to the bending mold.

[0020] The beneficial effect of adopting the above technical solution is that the setting of the first cam and the first follower fully utilizes the advantages of the cam mechanism transmission such as simple structure, compactness and convenient design, which can not only save the configuration cost of the drive mechanism, but also achieve the purpose of miniaturization of the equipment.

[0021] As a further improvement of the present invention, the second transmission assembly includes a second cam and a second follower that cooperates with the second cam for transmission, the second cam is fixed on the main transmission shaft, and the protruding direction of the second cam and the protruding direction of the first cam have a predetermined angle in the circumferential direction of the main transmission shaft; the second follower is connected to the shearing tool.

[0022] The beneficial effect of adopting the above technical solution is that the setting of the second cam and the second follower can not only save the configuration cost of the drive mechanism, but also control the time difference between bending and shearing by setting the angle difference between the second cam and the first cam, which is stable and reliable.

[0023] As a further improvement of the present invention, the stepping mechanism further includes a thumbwheel and a thumbwheel driving unit, the thumbwheel is arranged at the strip hole of the left guard plate or the right guard plate, and the thumbwheel driving unit is connected to the thumbwheel.

[0024] The beneficial effects of adopting the above technical solution are: the introduction of the thumbwheel and the thumbwheel drive unit provides another control method for the stepping of the PIN. Under the premise of also meeting the requirement of driving the PIN forward step by step with a fixed stride, the thumbwheel is easier to install and more flexible, and the layout position can be set in a wide range, and the configuration cost is lower.

[0025] On the other hand, the present invention further discloses a PIN folding machine, which includes the folding and shearing device for a PIN folding machine described in any one of the above technical solutions.

[0026] The beneficial effect of adopting the above technical solution is that: the PIN folding machine including the folding and shearing device in any of the above technical solutions can effectively control the movement and stop of the PIN in a simple and quick way, and realize efficient and quick folding and shearing of the PIN and how to achieve a high degree of coordination between the movement and stop of the PIN and the folding and shearing action, and the PIN folding quality is more stable and reliable, and easy to control. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is a schematic front view of a folding and shearing device of the present invention;

[0029] Figure 2 It is a schematic top view of the folding and shearing device of the present invention;

[0030] Figure 3 This is a schematic diagram of the PIN of the present invention after bending;

[0031] Figure 4 It is a schematic front view of another folding and shearing device of the present invention;

[0032] Figure 5 It is a schematic front view of another folding and shearing device of the present invention;

[0033] The corresponding parts represented by the numbers in the figure are as follows:

[0034] PIN 01; female PIN body 011; PIN needle 012; bracket 1; row PIN track 2; left guard plate 21; right guard plate 22; strip hole 23; feed end 24; discharge end 25; sealing assembly 26; magnetic retaining ring 261; left ring 2611; right ring 2612; stepping mechanism 3; stepping insert 31; telescopic drive unit 32; dial wheel 33; dial wheel drive unit 34; bending mechanism 4; bending mold 41; bending left mold 411; bending right mold 412; first reset element 42; first transmission assembly 43; first cam 431; first follower 432; drive mechanism 44; main transmission shaft 441; shearing mechanism 5; shearing tool 51; second reset element 52; second transmission assembly 53; second cam 531; second follower 532. DETAILED DESCRIPTION

[0035] To facilitate understanding of the present invention, the following will provide a more comprehensive and detailed description of the present invention in conjunction with the accompanying drawings and preferred embodiments. However, the scope of protection of the present invention is not limited to the following specific embodiments. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other unless there is a conflict.

[0036] In order to achieve the purpose of the present invention, the technical solution provided by the present invention is:

[0037] On the one hand, in some embodiments of the present invention, as Figure 1-3As shown, a folding and shearing device for a PIN folding machine is disclosed, comprising: a bracket 1, a row PIN track 2, a stepping mechanism 3, a bending mechanism 4 and a shearing mechanism 5. The bracket 1 is arranged at the bottom and is used to support the row PIN track 2, the bending mechanism 4, the shearing mechanism 5 and the stepping mechanism 3; the row PIN track 2 is constructed as a strip track laid and fixed on the bracket 1, for conveying PIN 01, the PIN 01 includes a female PIN body 011 and a PIN needle 012 connected to the female PIN body 011, the row PIN track 2 includes a left guard plate 21 and a right guard plate 22, the left guard plate 21 and the right guard plate 22 are parallel to each other, and the gap between the left guard plate 21 and the right guard plate 22 constitutes a passage for the PIN 01 to pass through, a strip hole 23 is provided on the side surface of the left guard plate 21, or a strip hole 23 is provided on the side surface of the right guard plate 22, or corresponding positions of the left guard plate 21 and the right guard plate 22 are both provided with strip holes 23, and the length of the strip hole 23 is greater than the PIN 01; the two ends of the PIN track 2 for entering and exiting the PIN 01 are respectively the feed end 24 and the discharge end 25; the stepping mechanism 3 is provided between the feed end 24 of the PIN track 2 and the bending mechanism 4, and is used to drive the PIN 01 in the PIN track 2 to advance gradually; the bending mechanism 4 is symmetrically arranged on both sides of the PIN track 2 along the length direction of the PIN track 2, and is used to bend the PIN needle 012 into a predetermined shape; the shearing mechanism 5 is provided on the left or right side of the PIN track 2 or arranged on the left and right sides of the PIN track 2, and is cooperated with the bending mechanism 4 to shear off the excess material after the PIN needle 012 is bent into the predetermined shape.

[0038] The beneficial effects of adopting the above technical solution are: fully considering the problems in the prior art that the bending and shearing of the PIN are completed independently, the movement and stop control of the PIN is complicated, and the coordination with the folding and shearing operations is unstable. By setting a stepping mechanism, the movement step of the PIN in the PIN track is strictly controlled according to the external dimensions of the PIN, and it is effectively coordinated with the bending mechanism and the shearing mechanism. The movement step is consistent, stable and reliable, and the quality and pass rate of the folded PIN are effectively improved. In addition, the equipment configuration is simple and it is easy to realize automated operation, which improves production efficiency while significantly saving costs.

[0039] In other embodiments of the present invention, Figure 1 As shown, the row PIN track 2 further includes a sealing component 26 , which is provided at the discharge end 25 of the row PIN track 2 to prevent the PIN 01 from automatically sliding out of the row PIN track 2 .

[0040] The beneficial effect of adopting the above technical solution is that the setting of the sealing component can effectively prevent the PIN from automatically sliding out of the PIN track during the folding and shearing process or in an uncontrolled state, especially for the PIN track arranged in the vertical direction, its effect is more prominent.

[0041] In other embodiments of the present invention, Figure 4 As shown, the PIN track 2 is laid in the vertical direction, and the sealing component 26 is a magnetic retaining ring 261. The magnetic retaining ring 261 includes a left ring 2611 and a right ring 2612. The left ring 2611 and the right ring 2612 are respectively rotated with the ends of the left guard plate 21 and the right guard plate 22, and the contact surfaces of the left ring 2611 and the right ring 2612 are embedded with different magnetic elements.

[0042] The beneficial effects of adopting the above technical solution are: using the magnetic ring as the sealing component, it fully utilizes the magnetic effect and the characteristics of the ring-shaped objects automatically resetting under the action of gravity, and has a long service life and is stable and reliable; on the other hand, the magnetic retaining ring has a simple structure and is easy to maintain.

[0043] In other embodiments of the present invention, Figure 4 As shown, corresponding positions of the left guard plate 21 and the right guard plate 22 are provided with strip holes; the stepping mechanism 3 includes a stepping knife 31 and a telescopic drive unit 32; the stepping knife 31 is perpendicular to the length direction of the row PIN track 2 and aligned with the strip hole 23, the insertion end of the stepping knife 31 is in the shape of a right triangle, and the hypotenuse of the insertion end faces the discharge end 25 of the row PIN track 2, and the maximum width of the insertion end is equal to the outer diameter of the PIN 01; the telescopic drive unit 32 is connected to the other end of the stepping knife 31.

[0044] The beneficial effects of adopting the above technical solution are: the setting of the stepping knife and the telescopic drive unit, on the one hand, uses the width of the stepping knife as the stepping length, which is simple and reliable, and effectively ensures the consistency of the progressive distance of each PIN during the folding and shearing process; on the other hand, each extension of the stepping knife into the PIN row track provides a forward driving force for the stepping of the PIN, and also provides an opening force for opening the sealing assembly of the PIN row track.

[0045] In other embodiments of the present invention, Figure 2 As shown, the bending mechanism 4 includes a bending mold 41, a first reset element 42, a first transmission assembly 43 and a driving mechanism 44; the bending mold 41 includes a left bending mold 411 and a right bending mold 412, and the left bending mold 411 and the right bending mold 412 are symmetrically arranged along the length direction of the PIN track 2, and are respectively connected to the driving mechanism 44 through the first transmission assembly 43; one end of the first reset element 42 is connected to the bending mold 41, and the other end is connected to the bracket 1.

[0046] The beneficial effects of adopting the above technical solution are: the introduction of the bending die into the bending mechanism effectively expands the application scope of the folding and shearing device. When it is necessary to bend PINs of different shapes, it is only necessary to replace the bending die to meet the diverse usage requirements, greatly reducing the number of matching folding and shearing devices and saving equipment procurement costs.

[0047] In other embodiments of the present invention, Figure 2 As shown, the shearing mechanism 5 includes a shearing tool 51, a second resetting element 52 and a second transmission assembly 53; the shearing tool 51 is matched with the bending left mold 411 or the bending right mold 412, and is used to shear the residual material after the PIN needle 012 is bent to a predetermined shape, and is connected to the driving mechanism 44 through the second transmission assembly 53; one end of the second resetting element 52 is connected to the shearing tool 51, and the other end is connected to the bracket 1.

[0048] The beneficial effect of adopting the above technical solution is that the shearing tool is arranged in conjunction with the bending die, which helps to complete the residual material shearing action while bending the PIN, effectively shortens the unit processing time of the PIN, makes the process arrangement more compact, and effectively improves production efficiency.

[0049] In other embodiments of the present invention, Figure 2 5, the driving mechanism 44 includes two main transmission shafts 441, and the two main transmission shafts 441 are respectively configured to correspond to the left bending mold 411 and the right bending mold 412. The first transmission assembly 43 includes a first cam 431 and a first follower 432 that cooperates with the first cam 431 for transmission. The first cam 431 is fixed on the main transmission shaft 441, and the first follower 432 is connected to the bending mold 41.

[0050] The beneficial effect of adopting the above technical solution is that the setting of the first cam and the first follower fully utilizes the advantages of the cam mechanism transmission such as simple structure, compactness and convenient design, which can not only save the configuration cost of the drive mechanism, but also achieve the purpose of miniaturization of the equipment.

[0051] In other embodiments of the present invention, Figure 5 As shown, the second transmission assembly 53 includes a second cam 531 and a second follower 532 that cooperates with the second cam 531 for transmission. The second cam 531 is fixed on the main transmission shaft 441, and the protruding direction of the second cam 531 and the protruding direction of the first cam 431 have a predetermined angle in the circumferential direction of the main transmission shaft 441; the second follower 532 is connected to the shearing tool 51.

[0052] The beneficial effect of adopting the above technical solution is that the setting of the second cam and the second follower can not only save the configuration cost of the drive mechanism, but also control the time difference between bending and shearing by setting the angle difference between the second cam and the first cam, which is stable and reliable.

[0053] In other embodiments of the present invention, Figure 5 As shown, the stepping mechanism 3 further includes a dial 33 and a dial driving unit 34 . The dial 33 is disposed at the strip hole 23 of the left guard plate 21 or the right guard plate 22 , and the dial driving unit 34 is connected to the dial 33 .

[0054] The beneficial effects of adopting the above technical solution are: the introduction of the thumbwheel and the thumbwheel drive unit provides another control method for the stepping of the PIN. Under the premise of also meeting the requirement of driving the PIN forward step by step with a fixed stride, the thumbwheel is easier to install and more flexible, and the layout position can be set in a wide range, and the configuration cost is lower.

[0055] On the other hand, in other embodiments of the present invention, a PIN folding machine is also disclosed, which includes the folding and shearing device for a PIN folding machine according to any one of the above technical solutions.

[0056] The beneficial effect of adopting the above technical solution is that: the PIN folding machine including the folding and shearing device in any of the above technical solutions can effectively control the movement and stop of the PIN in a simple and quick way, and realize efficient and quick folding and shearing of the PIN and how to achieve a high degree of coordination between the movement and stop of the PIN and the folding and shearing action, and the PIN folding quality is more stable and reliable, and easy to control.

[0057] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable ordinary technicians in this field to understand the content of the present invention and implement it. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A folding and shearing device for a PIN folding machine, characterized in that: include: Bracket, PIN track, stepping mechanism, bending mechanism and shearing mechanism, The bracket is provided at the bottom and is used to support the PIN track, bending mechanism, shearing mechanism and stepping mechanism; The row PIN track is constructed as a strip track laid and fixed on the bracket for conveying PINs. The PIN includes a mother PIN body and a PIN needle connected to the mother PIN body. The row PIN track includes a left guard plate and a right guard plate. The left guard plate and the right guard plate are parallel to each other, and the gap between the left guard plate and the right guard plate constitutes a channel for passing the PINs. The side of the left guard plate is provided with a strip hole, or the side of the right guard plate is provided with a strip hole, or corresponding positions of the left guard plate and the right guard plate are provided with strip holes. The length of the strip hole is greater than the outer diameter of the PIN. The two ends of the row PIN track for entering and exiting the PIN are respectively a feeding end and a discharging end. The stepping mechanism is provided between the feeding end of the PIN track and the bending mechanism, and is used to drive the PINs in the PIN track to advance gradually; The bending mechanism is symmetrically arranged on both sides of the row PIN track along the length direction of the row PIN track, and is used to bend the PIN pins into a predetermined shape; The shearing mechanism is arranged on the left or right side of the row PIN track or arranged on the left and right sides of the row PIN track, and is arranged in conjunction with the bending mechanism to shear off the excess material after the PIN pin is bent to a predetermined shape; It also includes a sealing assembly, which is arranged at the discharge end of the PIN track to prevent the PIN from automatically sliding out of the PIN track; The left and right guard plates are each provided with strip-shaped holes at corresponding positions; the stepping mechanism includes a stepping knife and a telescopic drive unit; the stepping knife is perpendicular to the length direction of the PIN track and aligned with the strip-shaped hole; the insertion end of the stepping knife is in the shape of a right triangle, with the hypotenuse of the insertion end facing the discharge end of the PIN track, and the maximum width of the insertion end is equal to the outer diameter of the PIN; the telescopic drive unit is connected to the other end of the stepping knife; The bending mechanism includes a bending die, a first reset element, a first transmission assembly, and a driving mechanism; the bending die includes a left bending die and a right bending die, the left bending die and the right bending die are symmetrically arranged along the length direction of the PIN track, and are respectively connected to the driving mechanism through the first transmission assembly; one end of the first reset element is connected to the bending die, and the other end is connected to the bracket; The row PIN track is laid in the vertical direction, and the sealing assembly is a magnetic retaining ring, which includes a left ring and a right ring. The left ring and the right ring are respectively rotatably connected with the ends of the left guard plate and the right guard plate, and the contact surfaces of the left ring and the right ring are embedded with different magnetic elements.

2. The folding and shearing device for a PIN folding machine according to claim 1, characterized in that The shearing mechanism includes a shearing tool, a second resetting element and a second transmission assembly; the shearing tool is matched with the bending left mold or the bending right mold, and is used to shear the residual material after the PIN needle is bent to a predetermined shape, and is connected to the driving mechanism through the second transmission assembly; one end of the second resetting element is connected to the shearing tool, and the other end is connected to the bracket.

3. The folding and shearing device for a PIN folding machine according to claim 2, characterized in that The driving mechanism includes two main transmission shafts, which are respectively configured to correspond to the left bending mold and the right bending mold. The first transmission assembly includes a first cam and a first follower that cooperates with the first cam for transmission. The first cam is fixed on the main transmission shaft, and the first follower is connected to the bending mold.

4. The folding and shearing device for a PIN folding machine according to claim 3, characterized in that The second transmission assembly includes a second cam and a second follower that cooperates with the second cam for transmission. The second cam is fixed on the main transmission shaft, and the protruding direction of the second cam and the protruding direction of the first cam have a predetermined angle in the circumferential direction of the main transmission shaft; the second follower is connected to the shearing tool.

5. A PIN folding machine, characterized in that: The invention comprises a folding and shearing device for a PIN folding machine according to any one of claims 1 to 4.

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