A pin folding device for varistor production

Abstract

The present invention relates to the technical field of pin folding for varistor production, and in particular to a pin folding device for varistor production, comprising a base and a varistor block, and also comprising a folding mechanism, wherein the folding mechanism comprises two extrusion blocks, wherein a group of adjustment components are respectively arranged in the two extrusion blocks, wherein the adjustment components comprise an electric push rod, a push column, a movable block and a limit plate, wherein the electric push rod is fixedly mounted on the side wall of the extrusion block, and the telescopic end of the electric push rod is fixedly connected to the push column. The present invention pushes the limit plate to adjust the foot spacing of the pin wires, thereby avoiding the phenomenon that the distance between the pin wires is too close, resulting in a short circuit or mutual interference between the pin wires, and at the same time preventing the distance between the pin wire feet from being too far or too close, thereby increasing the difficulty of welding and connection work, thereby reducing the operational difficulties and errors caused by inappropriate spacing, and during the adjustment process, the limit block is always attached to the outer wall of the extrusion block to avoid bending of the part above the pin wire foot.

Description

Technical Field

[0001] The invention relates to the technical field of pin angle bending for varistor production, and in particular to a pin angle bending device for varistor production. Background Art

[0002] During production, varistors are made of two metal wires bonded to semiconductor materials. Since the bonding distance cannot be controlled, the distance between the two pins is fixed. When the varistor is sold to buyers, the distance between the two pins of the varistor is different due to the different products of the buyers. Therefore, the purpose of the varistor's angle is to facilitate welding of the pins to the corresponding products during installation. Otherwise, welding will require extrusion and stretching, which will affect the subsequent use of the varistor.

[0003] At present, the pin bending device for varistor production in the prior art does not consider adjusting the distance between the pin wire legs after completing the pin bending. The distance between the pin wire legs will limit the flexibility of the circuit layout and increase the complexity of the circuit board. Failure to adjust the distance between the legs will also lead to difficulties in welding and connection, and it is difficult to accurately connect the pin wire to the correct position, thereby increasing the possibility of errors and operational risks. At the same time, when adjusting the distance between the pin wire legs, if the bent portion is not maintained, the bending effect of the middle end of the pin wire will be negatively affected, thereby affecting the overall bending effect. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of poor corner bending effect of varistors in the prior art, and to propose a pin corner bending device for varistor production.

[0005] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a pin bending device for varistor production, comprising a base and a varistor block, the side wall of the varistor block being fixedly connected with two pin wires, and further comprising:

[0006] Angle folding mechanism, the angle folding mechanism is installed on the top of the base through a sliding component, the angle folding mechanism is in two groups, and corresponds to two pin wires respectively, the angle folding mechanism includes two extrusion blocks, an extrusion mechanism is arranged between the two extrusion blocks, and a group of adjustment components are respectively arranged in the two extrusion blocks, and the adjustment components are used to adjust the foot spacing of the two pin wires;

[0007] The adjustment assembly includes an electric push rod, a push column, a movable block and a limit plate, the electric push rod is fixedly mounted on the side wall of the extrusion block, and the electric push rod is located on the side of the extrusion block away from the pin wire, the telescopic end of the electric push rod approaches the pin wire and is fixedly connected to the push column, one end of the push column away from the electric push rod is fixedly connected to the limit plate, the movable block is slidably connected to the inside of the extrusion block, the push column passes through the movable block, the limit plate is located on the side of the movable block away from the electric push rod, and is slidably connected to the movable block, the outer wall of the push column is sleeved with a first spring, and the first spring is located on the side of the movable block away from the limit plate;

[0008] A second spring is fixedly connected inside the movable block, one end of the second spring away from the movable block is fixedly connected to a limiting block, and the limiting block is slidably connected to the movable block.

[0009] Preferably, a fixing seat is fixedly mounted on the top of the base, the fixing seat is disc-shaped, and the varistor block is arranged on the fixing seat.

[0010] Preferably, it also includes a clamping mechanism, which is used to fix the varistor block. The clamping mechanism includes two first hydraulic cylinders fixedly installed on the top of the base, and the two first hydraulic cylinders are symmetrically distributed at both ends of the fixed seat. The telescopic ends of the two first hydraulic cylinders are close to each other and are respectively fixedly installed with clamping blocks. The clamping blocks are arc-shaped, and the bottom of the clamping blocks is slidably connected to the top of the base.

[0011] Preferably, the sliding assembly includes a fixed plate and an electric slider, the fixed plate is fixedly mounted on the top of the electric slider, the electric slider is slidably connected to the top of the base, and the extrusion block is connected to the fixed plate through a telescopic assembly.

[0012] Preferably, the telescopic assembly includes a second hydraulic cylinder fixedly installed in the fixed plate, the telescopic end of the second hydraulic cylinder is close to the pin wire and is fixedly connected to a connecting plate, the connecting plate is slidably connected to the fixed plate, and the extrusion block is fixedly installed on the top of the connecting plate.

[0013] Preferably, the extrusion mechanism comprises an angle block, the angle block is installed together with the extrusion block through an installation assembly, the angle block is axisymmetric, and a clamping plate is fixedly installed on the side wall of the angle block.

[0014] Preferably, the installation components are in two groups, and the two groups of the installation components are symmetrically distributed at both ends of the angle block. The side wall of the extrusion block is provided with a slot, and the installation components include a card block, which is slidably connected in the angle block, and the card block passes through the engaging plate and is slidably connected to the engaging plate, and the card block is engaged with the slot, and a rack is fixedly installed on the side of the card block away from the slot, and the rack is slidably connected inside the angle block.

[0015] Preferably, two groups of driving components are provided on the top of the angle block, and the two groups of driving components correspond to two groups of mounting components respectively. The driving components are used to drive the rack to slide. The driving components include a servo motor fixedly installed on the top of the angle block, and the output end of the servo motor is fixedly connected to a rotating rod, and the rotating rod is rotatably connected to the angle block. A gear is fixedly installed on the side wall of the rotating rod, and the gear is meshed with the rack.

[0016] Preferably, a semiconductor refrigeration block is fixedly mounted on the side wall of the angle block, and the semiconductor refrigeration block is used to heat the angled portion of the lead wire.

[0017] Preferably, a vibration motor is fixedly mounted on the top of the corner block, and the vibration motor is located in the middle of the two groups of drive components.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] 1. The present invention installs devices such as a card block, a servo motor and a rack, and starts the servo motor, so that the rack drives the card block to slide out of the locking plate under the action of the gear, and the card block is engaged with the card slot, so that the corner block and the extrusion block are installed. The servo motor can be started again to separate the card block from the card slot, and the corner block can be directly taken out. The operation is simple and fast, thereby improving the overall work efficiency of the equipment. By connecting the corner block with the extrusion blocks at different positions, the two groups of pin wires can be folded towards or away from each other, so that the range of the folding angle is increased, thereby improving the practicality of the device.

[0020] 2. The present invention installs devices such as an electric push rod, a push column and a limit plate, and uses the electric push rod to push the limit plate, thereby controlling the distance between the feet of the two groups of pin wires to decrease or increase, so as to meet the requirements of different packaging specifications, achieve better compatibility and adaptability, avoid the distance between the pin wires being too close, resulting in a short circuit or mutual interference between the pin wires, and prevent the poor distance between the feet of the pin wires, which increases the difficulty of welding and connection work, thereby reducing the operational difficulties and errors caused by inappropriate spacing.

[0021] 3. The present invention installs a vibration motor and a semiconductor refrigeration block, and utilizes the semiconductor refrigeration block to heat the corner of the pin wire, so that the stress in the pin wire is released, avoiding stress concentration that may cause the pin wire to break during subsequent use. Heating makes the pin wire softer and more extensible, making it easier to bend the pin wire when it is folded, thereby reducing the risk of breakage. At the same time, the vibration motor is started, which helps to disperse the stress at the corner of the pin wire. The synergistic effect of vibration and heating allows the pin wire to reach the desired corner shape and performance more quickly, thereby improving production efficiency.

[0022] 4. The present invention installs devices such as an electric slider, a clamping block and a fixing plate, and uses the clamping block to fix the varistor block on the fixing seat, thereby ensuring the stability of the varistor block during the folding process, avoiding the varistor block from shaking or moving, which may cause inaccurate folding or damage of the pin wire. The arc-shaped clamping block fits the outer wall of the varistor block more closely, thereby achieving a better clamping effect and higher clamping stability. The electric slider is used to drive the fixing plate to move, thereby realizing the folding of the pin wire at any position to meet different circuit layouts, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic structural diagram of a pin corner bending device for producing varistor.

[0024] Figure 2 This is a schematic structural diagram of the base and fixed plate parts of a pin angle bending device for varistor production proposed by the present invention.

[0025] Figure 3 The present invention provides a schematic structural diagram of a fixed plate and an electric slider portion of a pin folding device for producing a varistor.

[0026] Figure 4 This is a schematic diagram of the half-section axial structure of a fixing plate of a pin folding device for producing varistor proposed by the present invention.

[0027] Figure 5 The present invention provides a schematic structural diagram of the lead wire and extrusion block parts of a lead angle bending device for producing a varistor.

[0028] Figure 6 The present invention provides a schematic structural diagram of the pin wire and the folding block portion of a pin folding device for producing a varistor.

[0029] Figure 7 This is a schematic diagram of the axial structure of an extrusion block of a pin bending device for producing a varistor proposed by the present invention.

[0030] Figure 8 The present invention provides a schematic structural diagram of the extrusion block and movable block parts of a pin folding device for producing varistor.

[0031] Fig. 9 The present invention provides a schematic structural diagram of the limit block and extrusion block parts of a pin angle bending device for producing varistor.

[0032] Fig.10 This is a schematic diagram of the axial structure of a movable block of a pin bending device for producing varistor proposed by the present invention.

[0033] Fig.11 This is a schematic structural diagram of the push rod and limit plate parts of a pin angle bending device for varistor production proposed by the present invention.

[0034] Fig.12 This is a schematic diagram of the axial structure of a movable block of a pin bending device for producing varistor proposed by the present invention.

[0035] Fig.13 This is a schematic diagram of the axial structure of an extrusion block of a pin bending device for producing a varistor proposed by the present invention.

[0036] Fig.14 This is a schematic diagram of the half-section axial structure of a folding block of a pin folding device for producing a varistor proposed by the present invention.

[0037] Fig.15 This is a schematic diagram of the axial structure of a folding block of a pin folding device for producing a varistor proposed by the present invention.

[0038] Fig.16 The present invention provides a schematic structural diagram of the extrusion block and folding block parts of a pin folding device for producing a varistor.

[0039] In the figure: 1 base, 11 fixed seat, 12 electric slider, 13 varistor block, 131 pin wire, 2 first hydraulic cylinder, 21 clamping block, 3 fixed plate, 31 second hydraulic cylinder, 32 connecting plate, 33 extrusion block, 331 slot, 34 electric push rod, 341 push column, 35 movable block, 351 limit block, 352 limit plate, 353 second spring, 36 first spring, 4 vibration motor, 5 clamping plate, 51 angle block, 52 semiconductor refrigeration block, 53 clamping block, 6 servo motor, 61 rotating rod, 62 gear, 63 rack. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] Reference Figure 1 and Figure 2A pin bending device for varistor production includes a base 1 and a varistor block 13. A fixing seat 11 is fixedly installed on the top of the base 1. The fixing seat 11 is disc-shaped. Two first hydraulic cylinders 2 are fixedly installed on the top of the base 1. The two first hydraulic cylinders 2 are symmetrically distributed on both sides of the fixing seat 11. The telescopic ends of the two first hydraulic cylinders 2 are close to each other and are respectively fixedly installed with clamping blocks 21. The varistor block 13 is placed on the fixing seat 11, and the clamping blocks 21 clamp and fix it to ensure the stability of the varistor block 13 during the bending process to avoid inaccurate or damaged pin bending angles due to shaking or movement. The bottom of the clamping block 21 is slidably connected to the top of the base 1. The clamping block 21 is circular. The arc-shaped, circular-arc-shaped clamping block 21 can better fit the shape of the varistor block 13, thereby improving the clamping stability. The side wall of the varistor block 13 is fixedly connected with two pin wires 131. The top of the base 1 is slidably connected with an electric slider 12. The top of the electric slider 12 is fixedly installed with a fixed plate 3. Two sets of folding mechanisms are arranged on the fixed plate 3. Each set of folding mechanisms is provided with a set of extrusion mechanisms, and the two sets of folding mechanisms correspond to the two pin wires 131 respectively. The electric slider 12 drives the fixed plate 3 to move, so that the two sets of folding mechanisms can bend the specific positions of the two pin wires 131 to meet different circuit layouts and design requirements, thereby improving the practicality of the device.

[0042] Reference Figures 3 to 16The folding mechanism includes two second hydraulic cylinders 31, which are fixedly mounted inside the fixed plate 3. The telescopic ends of the two second hydraulic cylinders 31 are close to each other and are fixedly mounted with connecting plates 32 respectively. The connecting plates 32 are slidably connected to the fixed plate 3. Extrusion blocks 33 are fixedly mounted on the tops of the two connecting plates 32 respectively. A card slot 331 is provided on one side of the two extrusion blocks 33 close to each other. The extrusion mechanism is located between the two extrusion blocks 33. The second hydraulic cylinder 31 works. When the extrusion mechanism is located in the middle position of the two extrusion blocks 33, the folding is completed. The extrusion mechanism includes a folding block 51. The folding block 51 is axially symmetrical. Two sets of mounting components are arranged inside the folding block 51. The mounting components are used to mount the folding block 51 and a certain extrusion block 33 together. A clamping plate 5 is fixedly installed on the side wall of the corner block 51. The clamping plate 5 is an arc-shaped plate that fits the outer wall of the corner block 51. The installation assembly includes a servo motor 6. The servo motor 6 is fixedly installed on the top of the corner block 51. The output end of the servo motor 6 is fixedly connected to a rotating rod 61. The rotating rod 61 is rotatably connected to the inside of the corner block 51. A gear 62 is fixedly installed on the side wall of the rotating rod 61. The gear 62 is located inside the corner block 51 and is rotatably connected to the corner block 51. A rack 63 is slidably connected to the inside of the corner block 51. The rack 63 meshes with the gear 62. A clamping block 53 is fixedly connected to the side wall of the rack 63. The clamping block 53 is slidably connected to the corner block 51. The clamping block 53 passes through the clamping plate 5 and is slidably connected to the clamping plate 5. The clamping block 53 is engaged with the clamping groove 331 on the extrusion block 33 on the corresponding side.

[0043] After the servo motor 6 is started, the gear 62 rotates, and the rack 63 slides under the force of the gear 62, and the block 53 slides following the rack 63, thereby realizing the engagement and separation of the block 53 and the slot 331. When the block 53 is engaged with the slot 331, the folding block 51 and the extrusion block 33 are installed. One of the two groups of installation components is selected and installed together with the extrusion block 33 on the corresponding side, thereby changing the folding direction of the pin wire 131, so that the two pin wires 131 can be folded toward each other or away from each other, thereby adapting to more types of product designs without the need to replace equipment, thereby improving production efficiency and making the device more practical.

[0044] A vibration motor 4 is fixedly installed on the top of the corner block 51, and two groups of mounting components are symmetrically distributed on both sides of the vibration motor 4. Two semiconductor refrigeration blocks 52 are fixedly installed on the outer wall of the corner block 51. The two semiconductor refrigeration blocks 52 are symmetrically distributed on both sides of the corner block 51 close to the extrusion block 33. The semiconductor refrigeration block 52 is spliced ​​by multiple semiconductor refrigeration sheets to match the shape of the corner block 51. Stress concentration will occur in the pin wire 131 during the folding process. Stress concentration will cause the pin wire 131 to break or other failure modes in subsequent use. The semiconductor refrigeration block 52 heats the folded corner of the pin wire 131, so that the stress in the pin wire 131 is released. Heating can rearrange the microstructure inside the material, thereby reducing stress concentration. The pin wire 131 becomes softer and more extensible when heated, making it easier for the pin wire 131 to form a desired shape when folded, thereby reducing the risk of breakage.

[0045] The vibration motor 4 is started when the corner is folded, and the vibration causes the pin wire 131 to move slightly between the folding block 51 and the extrusion block 33, which helps to ensure that the contact between the pin wire 131 and the semiconductor refrigeration block 52 is more uniform, so that the pin wire 131 is heated more evenly, thereby avoiding problems of local overheating or temperature gradients. At the same time, the vibration helps to disperse the stress at the folding corner of the pin wire 131 and prevent excessive concentration of stress at a specific position, thereby reducing the risk of fracture or other failure modes at the folding corner. The synergistic effect of vibration and heating allows the pin wire 131 to achieve the desired folding shape and performance more quickly, which helps to improve production efficiency.

[0046] The two groups of folding mechanisms are respectively provided with adjustment mechanisms, and the adjustment mechanisms are used to adjust the distance between the feet of the two groups of pin wires 131. The adjustment mechanisms include two groups of adjustment components, and the two groups of adjustment components are symmetrically distributed on both sides of the corresponding pin wires 131. The adjustment components include an electric push rod 34, a push column 341, a movable block 35 and a limit plate 352. The electric push rod 34 is fixedly installed on the side wall of the extrusion block 33, and the electric push rod 34 is located on the side of the extrusion block 33 away from the pin wire 131. The push column 341 is fixedly installed at the telescopic end of the electric push rod 34. The outer wall of the push column 341 is provided with a first spring 36. The movable The block 35 is slidably connected to the inside of the extrusion block 33, the push column 341 passes through the movable block 35, and the first spring 36 is located outside the movable block 35, the end of the push column 341 away from the movable block 35 is fixedly connected to the limit plate 352, the limit plate 352 and the movable block 35 are slidably connected together, the inside of the movable block 35 is fixedly connected with a second spring 353, the end of the second spring 353 away from the movable block 35 is fixedly connected to the limit block 351, the limit block 351 is slidably connected to the movable block 35, and the limit block 351 is always close to the surface of the extrusion block 33 under the action of the second spring 353.

[0047] In the present invention, when the varistor needs to be folded at an angle, the varistor block 13 is placed on the fixed seat 11, and then the first hydraulic cylinder 2 is started, so that the two groups of first hydraulic cylinders 2 respectively drive the clamping blocks 21 to slide from the outside to the inside along the upper end of the base 1. The varistor block 13 can be made to have a center point on the vertical center line of the fixed seat 11 through the two groups of clamping blocks 21, thereby realizing the positioning of the two pin wires 131 of the varistor block 13, which is convenient for the subsequent folding work. When the positioning is completed, the electric slider 12 is started, so that the electric slider 12 drives the fixed plate 3 to slide along the upper end of the base 1, thereby changing the position of the folding angle, which is convenient for the subsequent foot cutting work to determine the cutting position according to the height of the folding angle.

[0048] When the fixed plate 3 moves to the folding position, the second hydraulic cylinder 31 on the left side of the right pin wire 131 is first started, so that the second hydraulic cylinder 31 on the left side drives the extrusion block 33 to move to the right through the connecting plate 32 until the end of the movable block 35 reaches the center position of the right pin wire 131, and then the second hydraulic cylinder 31 on the right side of the right pin wire 131 is started, so that the second hydraulic cylinder 31 on the right side drives the extrusion block 33 on the right side to move to the left through the connecting plate 32. The leftward movement of the extrusion block 33 will drive the folding block 51 to move synchronously, and the folding block 51 contacts the pin wire 131 to fold the pin wire 131. When the two sets of limit plates 352 on the two sets of movable blocks 35 contact each other, the folding is completed.

[0049] When facing the welding requirements of different products, the foot distance between the two sets of pin wires 131 should also be adjusted. At this time, the electric push rod 34 on the right extrusion block 33 is started, so that the electric push rod 34 drives the right limit plate 352 to move to the left through the push column 341. At the same time, the electric push rod 34 on the left extrusion block 33 is started, so that the left electric push rod 34 drives the movable block 35 to slide to the right along the left extrusion block 33 through the left limit plate 352. When the movable block 35 slides, it will drive the limit block 351 to move synchronously. The limit block 351 is in the first Under the action of the two springs 353, they can always keep close to the surface of the extrusion block 33, so that the pin wire 131 can be guaranteed to be in a bent state at the corner when folding, reducing the stress caused by deformation. Due to the change in the position of the left and right groups of limiting plates 352, the contact position of the two groups of limiting plates 352 is changed, thereby changing the distance between the feet of the two groups of pin wires 131. The device can adjust the distance between the feet of the two groups of pin wires 131 according to different needs, which is convenient for meeting the production needs of different products during production.

[0050] Due to different production requirements of different products, sometimes the distance between the two groups of pin wires 131 required for product production is greater than the diameter of the varistor block 13, and the two groups of second hydraulic cylinders 31 are started, so that the two groups of second hydraulic cylinders 31 respectively drive the two groups of extrusion blocks 33 to approach each other, and the clamping plate 5 fixedly installed on the left end of the angle block 51 is in contact with the inner wall of the extrusion block 33 on the left. At this time, the servo motor 6 on the left side of the angle block 51 is started, so that the servo motor 6 drives the rotating rod 61 to rotate counterclockwise, so that the rotating rod 61 drives the gear 62 to move synchronously, and the rotation of the gear 62 will mesh with the rack 63, so that the rack 63 drives the card block 53 to slide from the inside to the outside along the inner wall of the clamping plate 5 and the angle block 51, so that the two groups of card blocks 53 on the left side of the angle block 51 are in contact with the card slot on the left extrusion block 33. 331 is engaged, and the servo motor 6 on the right side of the folding block 51 is started to rotate clockwise, so that the servo motor 6 on the right side drives the two groups of blocks 53 on the right side of the folding block 51 to separate from the slot 331 on the right extrusion block 33. At this time, the two groups of engaging plates 5 on the right side of the folding block 51 release the limit from the right extrusion block 33, so that the folding block 51 is engaged with the extrusion block 33 on the left through the two groups of engaging plates 5 on the left. At this time, the pin wire 131 can be folded outward. When the distance between the feet of the two groups of pin wires 131 needs to be adjusted, it is only necessary to perform the above steps in reverse, so that the device can fold the pin wire 131 inwardly and outwardly at the same time, thereby further improving the production needs of different products.

[0051] Since the folding angle changes the original shape of the pin wire 131, stress will be generated in the pin wire 131 when the folding angle is applied, which not only reduces the service life of the varistor block 13, but also affects the use function of the varistor block 13. When the folding angle block 51 folds the pin wire 131, the semiconductor refrigeration block 52 fixedly installed outside the folding angle block 51 is started, so that the semiconductor refrigeration block 52 heats the pin wire 131, thereby releasing the stress at the folding angle of the pin wire 131, improving the mechanical properties of the pin wire 131. When the semiconductor refrigeration block 52 heats the pin wire 131, the vibration motor 4 is started, so that the vibration motor 4 causes the folding angle block 51 to vibrate, and then the folding angle of the pin wire 131 by the folding angle block 51 is vibrated, thereby further releasing the stress at the folding angle of the pin wire 131, thereby improving the service life of the subsequent varistor block 13.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pin bending device for producing a varistor, comprising a base (1) and a varistor block (13), wherein the side wall of the varistor block (13) is fixedly connected with two pin wires (131), characterized in that: Also includes: An angle folding mechanism, the angle folding mechanism is installed on the top of the base (1) through a sliding component, the angle folding mechanism is in two groups, and corresponds to two pin wires (131) respectively, the angle folding mechanism comprises two extrusion blocks (33), an extrusion mechanism is arranged between the two extrusion blocks (33), and a group of adjustment components are arranged in each of the two extrusion blocks (33), and the adjustment components are used to adjust the foot spacing of the two pin wires (131); The adjustment assembly comprises an electric push rod (34), a push column (341), a movable block (35) and a limit plate (352); the electric push rod (34) is fixedly mounted on the side wall of the extrusion block (33), and the electric push rod (34) is located on a side of the extrusion block (33) away from the pin wire (131); the telescopic end of the electric push rod (34) approaches the pin wire (131) and is fixedly connected to the push column (341); the end of the push column (341) away from the electric push rod (34) is connected to the pin wire (131); The limit plate (352) is fixedly connected, the movable block (35) is slidably connected inside the extrusion block (33), the push column (341) passes through the movable block (35), the limit plate (352) is located on a side of the movable block (35) away from the electric push rod (34), and is slidably connected to the movable block (35), the outer wall of the push column (341) is sleeved with a first spring (36), and the first spring (36) is located on a side of the movable block (35) away from the limit plate (352); A second spring (353) is fixedly connected inside the movable block (35); one end of the second spring (353) away from the movable block (35) is fixedly connected to a limit block (351); and the limit block (351) is slidably connected to the movable block (35); The extrusion mechanism comprises a folded corner block (51), the folded corner block (51) being installed together with the extrusion block (33) via an installation assembly, the folded corner block (51) being of an axisymmetric shape, and a clamping plate (5) being fixedly installed on a side wall of the folded corner block (51); The mounting components are in two groups, and the two groups of mounting components are symmetrically distributed at both ends of the angle block (51). A slot (331) is provided on the side wall of the extrusion block (33). The mounting components include a slot (53), and the slot (53) is slidably connected in the angle block (51). The slot (53) passes through the engaging plate (5) and is slidably connected to the engaging plate (5). The slot (331) is engaged with the slot (53). A rack (63) is fixedly mounted on a side of the slot (53) away from the slot (331), and the rack (63) is slidably connected inside the angle block (51). Two groups of drive components are arranged on the top of the angle block (51), and the two groups of drive components correspond to the two groups of mounting components respectively. The drive components are used to drive the rack (63) to slide, and the drive components include a servo motor (6) fixedly mounted on the top of the angle block (51), and the output end of the servo motor (6) is fixedly connected to a rotating rod (61), and the rotating rod (61) is rotatably connected to the angle block (51). A gear (62) is fixedly mounted on the side wall of the rotating rod (61), and the gear (62) is meshed with the rack (63); A semiconductor refrigeration block (52) is fixedly mounted on the side wall of the angled block (51), and the semiconductor refrigeration block (52) is used to heat the angled portion of the lead wire (131); A vibration motor (4) is fixedly mounted on the top of the angle block (51), and the vibration motor (4) is located in the middle of the two groups of drive components.

2. A pin folding device for varistor production according to claim 1, characterized in that: A fixing seat (11) is fixedly mounted on the top of the base (1); the fixing seat (11) is disc-shaped, and the varistor block (13) is arranged on the fixing seat (11).

3. A pin folding device for varistor production according to claim 2, characterized in that: It also includes a clamping mechanism, the clamping mechanism is used to fix the varistor block (13), the clamping mechanism includes two first hydraulic cylinders (2) fixedly mounted on the top of the base (1), the two first hydraulic cylinders (2) are symmetrically distributed at both ends of the fixing seat (11), the telescopic ends of the two first hydraulic cylinders (2) are close to each other, and are respectively fixedly mounted with clamping blocks (21), the clamping blocks (21) are arc-shaped, and the bottom of the clamping blocks (21) is slidably connected to the top of the base (1).

4. A pin folding device for varistor production according to claim 1, characterized in that: The sliding assembly comprises a fixed plate (3) and an electric slider (12); the fixed plate (3) is fixedly mounted on the top of the electric slider (12); the electric slider (12) is slidably connected to the top of the base (1); and the extrusion block (33) is connected to the fixed plate (3) via a telescopic assembly.

5. A pin folding device for varistor production according to claim 4, characterized in that: The telescopic assembly comprises a second hydraulic cylinder (31) fixedly mounted in the fixed plate (3); the telescopic end of the second hydraulic cylinder (31) is close to the pin wire (131) and is fixedly connected to a connecting plate (32); the connecting plate (32) is slidably connected to the fixed plate (3); and the extrusion block (33) is fixedly mounted on the top of the connecting plate (32).

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