Traceless bending device for resistor

Abstract

The invention provides a traceless bending device for a resistor. The traceless bending device comprises a stamping assembly and a lower die. The lower die comprises a base, a floating block and push blocks located on the two sides of the floating block, positioning parts are arranged on the push blocks, the top of the floating block is flush with the positioning parts, the top of the floating block and the positioning parts are matched to jointly support a resistor semi-finished product to be bent, and reset springs are arranged between the push blocks and the base. The stamping assembly comprises a sliding table, a punch and a guide block matched with the push block. The punch is used for driving the floating block and the positioning part to be staggered so that the two ends of the resistor semi-finished product can be bent. The guide block is used for driving the push blocks to get close to each other so that the push blocks can press the bent portions of the resistor semi-finished products to the side face of the punch. In conclusion, the traceless bending device for the resistor can solve the problem that folding marks are generated on the surface of the resistor due to the fact that the bending speed is too high, the bending efficiency of the resistor is improved, and meanwhile the bending quality of the resistor is guaranteed.

Description

Technical Field

[0001] This invention relates to a non-marking bending device for resistors, and more particularly to a non-marking bending device for resistors. Background Technology

[0002] like Figure 1 The resistor semi-finished product 1 shown has a U-shaped resistor body, which needs to be formed by a bending process. The existing bending device provides a punch 2 and a lower die 3. The lower die has a groove 4 that matches the punch 2. The outer wall of the punch 2 and the inner wall of the groove 4 together form a U-shaped forming cavity. After the punch 2 presses the resistor 1 into the groove 4, it can drive the part entering the forming cavity to bend, such as... Figure 2 As shown.

[0003] However, since the slot size is fixed, the part of the resistor semi-finished product 1 located at the edge of the punch 2 bends rapidly during the process of entering the groove 4. The part of the resistor semi-finished product 1 that bends is a stress concentration point. When bending, the material at this position is stretched, and the stress generated during the bending process further aggravates the stretching of the material, making the bent part thinner, and thus producing creases at the bent part. At the same time, when the resistor semi-finished product 1 enters the groove 4, it will rub against the edge of the lower die 3. If the punch 2 presses down too fast, it is easy to leave scratches and creases on the resistor 1.

[0004] Creases caused by bending the resistor not only affect the flatness of the resistor surface, but also easily lead to breakage at the bending point and unpredictable drift in resistance value. Therefore, how to reduce creases during resistor forming is a problem that needs to be solved. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a non-marking bending device for resistors, which solves the problem of creases on the resistor surface caused by excessive bending speed, improves the bending efficiency of resistors, and ensures the bending quality of resistors.

[0006] The objective of this invention is achieved through the following technical solution: A non-marking bending device for resistors, comprising: a stamping assembly and a lower die; The lower mold includes a base, a floating block, and push blocks located on both sides of the floating block. The push block is provided with a positioning part. The top of the floating block is flush with the positioning part. The top of the floating block and the positioning part cooperate to support the resistor semi-finished product to be bent. A return spring is provided between the push block and the base. The return spring is used to drive the push block away from the floating block. The stamping assembly includes a slide, a punch, and a guide block that matches the push block. The slide is used to drive the punch and the guide block closer to the lower die. The punch is used to drive the floating block to be offset from the positioning part, so that the two ends of the resistor semi-finished product bend. The guide block is used to drive the push blocks to move closer together, so that the push blocks press the bent part of the resistor semi-finished product against the side of the punch.

[0007] In one embodiment, the pusher has an inclined surface, and the guide block abuts against the inclined surface to drive the pusher toward the position of the floating block.

[0008] In one embodiment, the stamping assembly further includes a lead screw, a nut, two angle adjustment plates, and two deflection pressure plates. The lead screw and the nut are both located in the inner cavity of the punch. The nut has trapezoidal fins. The angle adjustment plates are rotatably located on the side of the punch. A first torsion spring is provided at the connection between the angle adjustment plate and the punch. The first torsion spring drives the angle adjustment plate to abut against the trapezoidal fins. Rotating the lead screw changes the tilt angle of the angle adjustment plate to adjust the bending angle of the resistor semi-finished product. A groove is provided on the side of the push block near the floating block. The deflection pressure plate is located in the groove. A rotating shaft is provided at the center of the deflection pressure plate. A second torsion spring is provided in the groove. The second torsion spring drives the end of the deflection pressure plate near the positioning part away from the floating block. When the push block approaches the floating block, the deflection pressure plate pushes the bent part of the resistor semi-finished product closer to the angle adjustment plate, and the deflection pressure plate rotates until it is parallel to the angle adjustment plate.

[0009] In one embodiment, a roller is provided at one end of the deflection plate near the positioning part, the roller is flush with the positioning part, and the length of the roller is greater than the width of the resistor semi-finished product.

[0010] In one embodiment, a limiting groove is formed on the punch, and the trapezoidal fin passes through the limiting groove and abuts against the angle adjustment piece.

[0011] In one embodiment, the end of the lead screw is provided with a nut.

[0012] In one embodiment, the outer wall of the punch is provided with a clearance groove.

[0013] In one embodiment, the base has a groove, and the pusher is located in the groove.

[0014] In one embodiment, the lower mold further includes an adjusting screw, which passes through the reset spring and is connected to the push block. The base is provided with a limiting boss that matches the adjusting screw, and the limiting boss cooperates with the adjusting screw to limit the translation distance of the push block.

[0015] In one embodiment, the width of the floating block is smaller than the width of the punch.

[0016] In summary, the non-marking bending device for resistors can solve the problem of creases on the resistor surface caused by excessive bending speed, improving the bending efficiency of resistors while ensuring the bending quality of resistors. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the resistor to be bent. Figure 2 A simplified diagram of the bending process for an existing bending device; Figure 3 This is a schematic diagram of a non-marking bending device used for resistors. Figure 4 Diagram showing the engagement state of the push block and punch before the stamping assembly is pressed down; Figure 5 This is a diagram showing the engagement state of the push block and the punch after the stamping assembly is pressed down; Figure 6 This is a schematic diagram of the punch and push block. Figure 7 This is a schematic diagram showing the disassembly of the punch; Figure 8 This is a schematic diagram showing the fit between the semi-finished resistor and the push block before bending. Figure 9 This is a schematic diagram showing the interaction between the semi-finished resistor and the push block during bending. Figure 10 A schematic diagram showing the interaction between the resistor semi-finished product and the push block after the bending action is completed. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] Please see Figure 3 The present invention provides a non-marking bending device 10 for resistors, which includes: a stamping assembly 100 and a lower die 200.

[0023] Please see Figure 3 and Figure 4 The lower mold 200 includes a base 210, a floating block 220, and push blocks 230 located on both sides of the floating block 220. The push block 230 is provided with a positioning part 231. The top of the floating block 220 is flush with the positioning part 231. The top of the floating block 220 and the positioning part 231 cooperate to support the resistor semi-finished product to be bent. A return spring 240 is provided between the push block 230 and the base 210. The return spring 240 is used to drive the push block 230 away from the floating block 220. Please see Figure 3 and Figure 5 The stamping assembly 100 includes a slide 110, a punch 120 and a guide block 130 that matches the push block 230. The slide 110 is used to drive the punch 120 and the guide block 130 closer to the lower die 200. The punch 120 is used to drive the floating block 220 to be offset from the positioning part 231 so that the two ends of the resistor semi-finished product bend; preferably, the width of the floating block 220 is smaller than the width of the punch 120.

[0024] The guide block 130 is used to drive the push blocks 230 to move closer together, so that the push blocks 230 press the bent part of the resistor semi-finished product against the side of the punch 120. Preferably, the push block 230 is provided with an inclined surface 232, and the guide block 130 abuts against the inclined surface 232 to drive the push block 230 to move toward the position of the floating block 220.

[0025] The aforementioned non-marking bending device 10 for resistors is used for... Figure 1The resistor semi-finished product 1 shown is bent by folding the strip-shaped semi-finished product along the fold line 11, so that the cross-section of the resistor semi-finished product 1 is U-shaped. Figure 1 As shown. To ensure bending accuracy, the forming cavity in existing bending devices is precisely matched to the thickness of the resistor semi-finished product 1. However, this also leads to severe deformation of the bent part, and creases are easily generated at stress concentration points. To ensure product bending quality, bending efficiency needs to be reduced. This application solves the problem of creases easily generated at the bending part by using the push block 230 in conjunction with the stamping assembly 100 to separate the bending process. The specific details are as follows: Please see Figure 4 Before the stamping assembly 100 is pressed down, the push block 230 is located away from the floating block 220 under the elastic force provided by the return spring 240. At this time, there is a gap between the two push blocks 230 and the floating block 220. After the resistor semi-finished product 1 is placed on the floating block 220, the floating block 220 contacts the center position of the resistor semi-finished product 1. The two ends of the resistor semi-finished product 1 are supported by the positioning part 231 on the two push blocks 230 respectively.

[0026] When the slide table 110 is started, the punch 120 and the guide block 130 descend synchronously. The punch 120 contacts the center position of the resistor semi-finished product 1 and forces the floating block 220 to sink, causing the floating block 220 to be misaligned with the two positioning parts 231. Since the two ends of the resistor semi-finished product 1 are supported by the positioning parts 231, the two ends of the resistor semi-finished product 1 are tilted upwards at this time, while the center position is pressed down. This is the first stage of the bending operation. As the slide table 110 continues to descend, the guide block 130 drives the push block 230 to move towards the floating block 220. As the push block 230 moves towards the floating block 220, it pushes the upward-curving part of the resistor semi-finished product 1 towards the punch 120, bending it until it fits against the side of the punch 120. This is the second stage of the bending operation. After the punch 120 resets, the floating block 220 rises again, and the resistor semi-finished product 1 is bent into a "U" shape. Figure 5 As shown.

[0027] Please see Figure 4 The difference from the original bending device is that before bending, the push block 230 is far away from the floating block 220, and there is a gap between the push block 230 and the floating block 220. This gives the resistor semi-finished product 1 more bending space, so that the resistor semi-finished product 1 is initially bent. Then the push block 230 pushes from both sides, so that the resistor semi-finished product 1 fits against the side of the punch 120, so that the product is formed. By bending in stages, the impact of stress concentration on the bending part is reduced, thereby avoiding the formation of creases in the bending part.

[0028] It should be noted that the resistors used in the bending operation in this application are made of metal. Due to the characteristics of metal materials, springback will occur after the product is bent. Springback after bending is an inherent property of the elastic behavior of materials and cannot be avoided. The only solution is to compensate for the springback by making the bending angle smaller than the target angle when designing the mold to offset the angle opening after springback. For example, to bend 90°, the product is bent to 88° using a mold. The core factor affecting springback is the yield strength of the material. Using different materials to manufacture the product, changing the product size, etc., will cause changes in the amount of springback after bending. Therefore, when bending resistor products of different specifications, it is necessary to conduct simulation tests to obtain the actual required bending angle, and it is necessary to manufacture a matching punch 120 and push block 230 based on the measured data. It is evident that the aforementioned seamless bending device 10 for resistors cannot match resistors of different specifications. Solving the bending springback problem requires external means. The punch 120 and push block 230 are components that come into direct contact with the product. Over time, wear and deformation are inevitable. The only way to avoid errors caused by bending springback is to replace the components, which limits the bending device.

[0029] To resolve the above issues, please refer to [link / reference]. Figure 6 and Figure 7 The stamping assembly 100 also includes a lead screw 140, a nut 150, two angle adjustment plates 160 and two deflection pressure plates 170.

[0030] Please see Figure 6 and Figure 7 Both the lead screw 140 and the nut 150 are located inside the punch 120. The nut 150 is provided with trapezoidal fins 151. Rotating the lead screw 140 can cause the nut 150 to rise or fall. Preferably, the end of the lead screw 140 is provided with a nut 141.

[0031] An angle adjustment piece 160 is rotatably mounted on the side of the punch 120. A first torsion spring (not shown) is provided at the connection between the angle adjustment piece 160 and the punch 120. When the nut 150 moves, the first torsion spring provides elastic force to keep the angle adjustment piece 160 and the trapezoidal fin 151 abutting against each other. That is, the tilt angle of the angle adjustment piece 160 can be changed by rotating the lead screw 140. During bending, the angle adjustment piece 160 is used as the bending reference so that the bent part on the resistor semi-finished product 1 fits against the angle adjustment piece 160. That is, the bending angle of the resistor semi-finished product 1 can be increased or decreased by adjusting the tilt angle of the angle adjustment piece 160. Preferably, a limiting groove 121 is provided on the punch 120. The trapezoidal fin 151 passes through the limiting groove 121 and abuts against the angle adjustment piece 160. The limiting groove 121 limits the distance that the nut 150 can move.

[0032] A groove 233 is provided on the side of the push block 230 near the floating block 220. The deflection plate 170 is located in the groove 233. A rotating shaft 171 is provided at the center of the deflection plate 170. A second torsion spring (not shown) is provided in the groove 233. The second torsion spring drives one end of the deflection plate 170 near the positioning part 231 away from the floating block 220. That is, before bending, the deflection plate 170 is tilted away from the floating block 220. At this time, the extension lines of the deflection plates 170 on the two push blocks 230 intersect to form a "V" shape. This can guide the center part of the resistor semi-finished product 1 to sink during bending, reduce the friction between the resistor semi-finished product 1 and the push block 230 during the sinking process, and avoid scratches on the surface of the resistor semi-finished product 1. Preferably, a roller 172 is provided on one end of the deflection plate 170 near the positioning part 231. The roller 172 is flush with the positioning part 231. The length of the roller 172 is greater than the width of the resistor semi-finished product, which further reduces the friction between the resistor semi-finished product 1 and the push block 230 and reduces the probability of scratches on the surface of the resistor semi-finished product 1 during the bending process.

[0033] When the pusher 230 approaches the floating block 220, the deflection plate 170 pushes the bent part of the resistor semi-finished product closer to the angle adjustment piece 160, and the end of the deflection plate 170 away from the positioning part 231 is blocked by the angle adjustment piece 160, so that the deflection plate 170 rotates around the rotating shaft 171 until it is parallel to the angle adjustment piece 160.

[0034] Please see Figure 8 , Figure 9 and Figure 10 The principle of adjusting the bending angle through the stamping assembly 100 is as follows: Determine the bending angle of resistor semi-finished product 1, taking 90° as an example; Prepare multiple semi-finished resistor products 1 to be bent; Rotating the lead screw 140 causes the nut 150 to descend. Under the action of the first torsion spring, the angle adjustment plate 160 keeps abutting against the trapezoidal fin 151 on the nut 150. As the position of the nut 150 changes, the angle adjustment plate 160 deflects accordingly, thereby adjusting the angle between the angle adjustment plate 160 and the bottom surface of the punch 120.

[0035] After the angle adjustment piece 160 is adjusted, the slide table 110 is activated to bend the resistor semi-finished product 1. The punch 120 first contacts the center part of the resistor semi-finished product 1, applying force to drive the center part of the resistor semi-finished product 1 to begin to sink, while the two ends of the resistor semi-finished product 1 are supported by the positioning part 231, causing the resistor semi-finished product 1 to tilt upwards. The tilted part is the part to be bent. The resistor semi-finished product 1 is then bent... Figure 8 The state shown becomes Figure 9 The state shown.

[0036] At the same time, the guide block 130 drives the push block 230 to move closer to the position of the floating block 220, the deflection plate 170 fits against the bent part of the resistor semi-finished product 1 and presses it against the angle adjustment piece 160. The deflection plate 170 is a rotatable structure and can rotate with the angle of the bent part on the resistor semi-finished product 1.

[0037] During the above process, the center of the resistor semi-finished product 1 is depressed by the downward pressure of the punch 120, and the two sides of the resistor semi-finished product 1 are pushed towards the punch 120 by the deflection plate 170. During this process, the punch 120 continues to descend, and the deflection plate 170 continuously approaches the punch 120. When the bent part of the resistor semi-finished product 1 bends to contact the angle adjustment piece 160, the end of the angle adjustment piece 160 applies pressure to the end of the deflection plate 170 away from the positioning part 231, causing the deflection plate 170 to deflect further until it is parallel to the angle adjustment piece 160. At this time, the angle adjustment piece 160, the bent part of the resistor semi-finished product 1, and the deflection plate 170 are in contact with each other. At this time, the bending angle of the bent part of the resistor semi-finished product 1 is consistent with the angle between the angle adjustment piece 160 and the bottom surface of the punch 120. Figure 10 As shown.

[0038] After removing the semi-finished resistor 1, the bent portion springs back. The actual bending angle of the semi-finished resistor 1 is checked to determine whether the actual bending angle is too large or too small. If the actual bending angle matches the target bending angle, the equipment debugging is complete. If the actual bending angle is too large, the lead screw 140 is rotated to lower the nut 150, reducing the angle between the angle adjustment piece 160 and the punch 120. Then, a new semi-finished resistor 1 is taken and bent again. If the actual bending angle is too small, the lead screw 140 is rotated to lower the nut 150, increasing the angle between the angle adjustment piece 160 and the punch 120. Then, a new semi-finished resistor 1 is taken and bent again until the actual bending angle of the obtained semi-finished resistor 1 matches the target bending angle.

[0039] The above-mentioned non-marking bending device 10 for resistors has the following beneficial effects: 1. The lower die 200 provides a floating block 220 and two push blocks 230. Before bending, there is a gap between the push block 230 and the floating block 220. During bending, the push blocks 230 are driven to move closer to each other to cancel the gap. This provides a larger sinking space before bending, reduces the friction between the resistor semi-finished product 1 and the positioning part 231 when the punch 120 presses down, and avoids leaving scratches on the surface of the resistor semi-finished product 1. 2. The bending process is divided into two parts: the punch 120 pressing down and the pusher 230 pushing laterally. This reduces the impact of stress concentration on the bending part and avoids creases in the bending part, thereby ensuring the quality of the obtained resistor product. 3. Using the angle adjustment plate 160 as a bending reference, the tilt angle of the angle adjustment plate 160 can be adjusted by the lead screw 140, nut 150, and first torsion spring, thereby increasing or decreasing the bending angle. A rotatable deflection pressure plate 170 is set on the push block 230. The rotatable structure of the deflection pressure plate 170 automatically adapts to the tilt angle of the angle adjustment plate 160. During bending, the deflection pressure plate 170 pushes the bending part on the resistor semi-finished product 1, making it fit with the angle adjustment plate 160 to complete the shaping. The bending angle can be adjusted according to the bending situation on site to offset the springback after bending. The tilt angle of the angle adjustment plate 160 is adjustable, and the deflection pressure plate 170 can adapt to the deflection angle of the angle adjustment plate 160. After changing the bending product, the bending angle can be adjusted on site using the bending device without making new fixtures, which can save mold manufacturing costs, improve device debugging efficiency, and make the bending device adaptable to the bending requirements of products of different specifications.

[0040] 4. As the pusher 230 approaches the punch 120, the deflection plate 170 provides a pushing force to push the bent part toward the angle adjustment piece 160. During this process, the deflection plate 170 can deflect according to the bending amount of the bent part on the resistor semi-finished product 1. Only when the bent part contacts the angle adjustment piece 160 does the angle adjustment piece 160 begin to deflect toward the side where the angle adjustment piece 160 is located, pressing the bent part toward the angle adjustment piece 160 to complete the shaping. The rotatable characteristic of the deflection plate 170 provides a buffer for the bent part, ensuring bending accuracy while further avoiding creases at the bending position.

[0041] Please see Figure 7 In one embodiment, the outer wall of the punch 120 is provided with a relief groove 122 to prevent the end of the resistor semi-finished product 1 from abutting against the punch 120 after bending.

[0042] Please see Figure 3 In one embodiment, a groove 211 is provided on the base 210, and the push block 230 is located in the groove 211. The groove 211 provides a limit and guides the two push blocks 230 to slide, so that the push block 230 slides more smoothly and steadily.

[0043] Please see Figure 4 In one embodiment, the lower mold 200 further includes an adjusting screw 250, which passes through the reset spring 240 and is connected to the push block 230. The base 210 is provided with a limiting boss 212 that matches the adjusting screw 250. The limiting boss 212 cooperates with the adjusting screw 250 to limit the translation distance of the push block 230.

[0044] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A non-marking bending device for resistors, characterized in that, include: Stamping components and lower die; The lower mold includes a base, a floating block, and push blocks located on both sides of the floating block. The push block is provided with a positioning part. The top of the floating block is flush with the positioning part. The top of the floating block and the positioning part cooperate to support the resistor semi-finished product to be bent. A return spring is provided between the push block and the base. The return spring is used to drive the push block away from the floating block. The stamping assembly includes a slide, a punch, and a guide block that matches the push block. The slide is used to drive the punch and the guide block closer to the lower die. The punch is used to drive the floating block to be offset from the positioning part, so that the two ends of the resistor semi-finished product bend. The guide block is used to drive the push blocks to move closer together, so that the push blocks press the bent part of the resistor semi-finished product against the side of the punch.

2. The seamless bending device for resistors according to claim 1, characterized in that, The pusher block has an inclined surface, and the guide block abuts against the inclined surface to drive the pusher block to move toward the position of the floating block.

3. The seamless bending device for resistors according to claim 1, characterized in that, The stamping assembly also includes a lead screw, a nut, two angle adjustment plates, and two deflection pressure plates. The lead screw and the nut are both located in the inner cavity of the punch. The nut is provided with trapezoidal fins. The angle adjustment plates are rotatably located on the side of the punch. A first torsion spring is provided at the connection between the angle adjustment plate and the punch. The first torsion spring drives the angle adjustment plate to abut against the trapezoidal fins. Rotating the lead screw is used to change the tilt angle of the angle adjustment plate to adjust the bending angle of the resistor semi-finished product. The push block has a groove on its side near the floating block, the deflection pressure plate is located in the groove, the center of the deflection pressure plate has a rotating shaft, and a second torsion spring is provided in the groove. The second torsion spring drives the end of the deflection pressure plate near the positioning part away from the floating block. When the pusher approaches the floating block, the deflection plate pushes the bent part of the resistor semi-finished product closer to the angle adjustment piece, and the deflection plate rotates until it is parallel to the angle adjustment piece.

4. The seamless bending device for resistors according to claim 3, characterized in that, A roller is provided at one end of the deflection plate near the positioning part. The roller is flush with the positioning part, and the length of the roller is greater than the width of the resistor semi-finished product.

5. The seamless bending device for resistors according to claim 3, characterized in that, A limiting groove is provided on the punch, and the trapezoidal fin passes through the limiting groove and abuts against the angle adjustment piece.

6. The seamless bending device for resistors according to claim 3, characterized in that, The end of the lead screw is provided with a nut.

7. The seamless bending device for resistors according to claim 1, characterized in that, The outer wall of the punch is provided with a clearance groove.

8. The seamless bending device for resistors according to claim 1, characterized in that, The base has a sliding groove, and the push block is located in the sliding groove.

9. The seamless bending device for resistors according to claim 1, characterized in that, The lower mold also includes an adjusting screw, which passes through the reset spring and is connected to the push block. The base is provided with a limiting boss that matches the adjusting screw. The limiting boss cooperates with the adjusting screw to limit the translation distance of the push block.

10. The seamless bending device for resistors according to claim 1, characterized in that, The width of the floating block is smaller than the width of the punch.

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