Alloy resistance material strip straightening device and straightening method thereof

Abstract

The application provides an alloy resistor material belt straightening device and a straightening method thereof. The alloy resistor material belt straightening device comprises a base and a plurality of straighteners. The straightener comprises a support, a U-shaped sliding block, a longitudinal roller and a transverse roller. A cross slot is formed in the support, and the longitudinal roller is arranged on the support. A sliding groove is arranged on the support and communicates with the cross slot. The U-shaped sliding block is slidably arranged in the sliding groove. One of the transverse rollers is connected with the U-shaped sliding block. The U-shaped sliding block is used for increasing or reducing the distance between the two transverse rollers. A plurality of straighteners are arranged to perform straightening and shaping operation on the material belt, multiple rolling is performed on the deformed parts to prevent the material belt from rebounding and deforming again. The longitudinal roller and the transverse roller are arranged on each straightener to roll the alloy resistor material belt in all directions, thereby improving the straightening effect. The distance between the transverse rollers arranged in opposite directions can be adjusted through the U-shaped sliding block. The U-shaped sliding blocks on the straighteners do not interfere with each other, and can be flexibly adjusted according to the size of the material belt, thereby avoiding jamming during feeding.

Description

Technical Field

[0001] This invention relates to the field of alloy resistance processing, and in particular to an alloy resistance strip straightening device and a straightening method thereof. Background Technology

[0002] like Figure 1 The alloy resistor strip 20 consists of a resistor body strip 21 and two copper strips 22, which are fixed to both sides of the resistor body strip 21 by laser welding. The copper strip 22 is soft, while the resistor body strip 21 is hard, and the two materials have different coefficients of thermal expansion. During laser welding, both materials are prone to deformation when heated, causing the resulting alloy resistor strip 20 to bend, thus affecting the processing of the alloy resistor. Furthermore, the winding and transfer of the alloy resistor strip 20 also presents a bending problem. Due to the inherent deformation of the strip, straightening treatment of the alloy resistor strip 20 is required before manufacturing the alloy resistor.

[0003] However, existing straightening devices have the following problems: 1. Metal materials are elastic, and the alloy resistance strip 20 exhibits a springback phenomenon after straightening. Existing straightening devices have poor straightening effects on the alloy resistance strip 20. 2. The existing straightening device uses left-right and up-down opposing rollers to roll the material strip, allowing the strip to pass through the gap between the rollers to complete the straightening operation. When the material strip bends too much, the curvature of the bent part exceeds the guide range of the roller inlet, causing the part to be straightened to get stuck between the two rollers, resulting in a jamming problem. Even if the part to be straightened is squeezed into the straightening device, it will still cause feeding jams. Therefore, when jamming occurs, the operator needs to straighten the part to be straightened to reduce its bending range in order to allow the material strip to enter the straightening device smoothly. This not only increases the cost of manual intervention but also reduces the production efficiency of alloy resistors. 3. When the size of the alloy resistance strip 20 is changed, the operator needs to adjust the spacing of each roller on the straightening device one by one, which makes the debugging difficult when changing products. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an alloy resistance strip straightening device and straightening method to prevent the alloy resistance strip from springing back after straightening and to avoid jamming during the straightening process.

[0005] The objective of this invention is achieved through the following technical solution: An alloy resistance material strip straightening device includes: a base and a plurality of straighteners; Multiple straighteners are spaced apart on the base along the transmission direction of the alloy resistance strip; The straightener includes a bracket, a U-shaped slider, two opposing longitudinal rollers and two opposing transverse rollers. The bracket has a cross groove, and the longitudinal rollers and the transverse rollers are located in the cross groove. The two longitudinal rollers are used to roll the front and back sides of the alloy resistance strip; the two transverse rollers are used to roll the two sides of the alloy resistance strip. The bracket is provided with a sliding groove communicating with the cross groove. The U-shaped slider is slidably disposed in the sliding groove. One of the transverse rollers is connected to the U-shaped slider. The sliding of the U-shaped slider is used to increase or decrease the distance between the two transverse rollers.

[0006] In one embodiment, an adjustable ruler is also included, which includes a reference surface and an inclined surface. The adjustable ruler passes through each of the slide grooves, and the reference surface is in contact with the inner wall of the slide groove. The inclined surface faces the U-shaped slider. A return spring is provided on the bracket, which is used to push the U-shaped slider to slide along the slide groove so that the U-shaped slider abuts against the inclined surface.

[0007] In one embodiment, the straightener is provided with an adjusting gear, the reference surface is provided with external teeth, the slide groove is provided with a clearance part that matches the external teeth, and the adjusting gear meshes with the external teeth.

[0008] In one embodiment, the thickness of the adjusting ruler increases from one end to the other.

[0009] In one embodiment, the reference surface is provided with a scale for indicating the thickness of the adjustment ruler.

[0010] In one embodiment, the cross-section of the adjustment ruler is a right-angled triangle.

[0011] In one embodiment, the base has a mounting groove, and the bracket is disposed in the mounting groove.

[0012] In one embodiment, the transverse roller has a groove, and the side of the alloy resistance strip extends into the groove.

[0013] In one embodiment, the straightener further includes a baffle plate disposed on the bracket and extending to the opening of the groove.

[0014] A straightening method, based on the above-mentioned alloy resistance strip straightening device, includes the following steps: Step 1: Identify the areas on the alloy resistance strip that show obvious deformation, measure the width of these areas, and calculate the difference between this width and the rated width of the alloy resistance strip. Record this difference as the offset dimension. Step 2: Insert the adjustment ruler through the groove of each straightener, push each U-shaped slider with the inclined surface to adjust the distance between the two transverse rollers on each straightener, and the distance decreases along the transmission direction of the alloy resistance strip. Step 3: Slide the adjustment ruler to make the distance between the two horizontal rollers on the first straightener greater than the offset dimension; Step 4: Feed the alloy resistance strip into the straightening device, so that the alloy resistance strip passes through each straightener in sequence; Step 5: The alloy resistance strip is fed through the straighteners so that the part to be straightened passes through each straightener in sequence. The longitudinal rollers roll the front and back of the strip, and the transverse rollers roll the sides of the strip to complete the straightening operation.

[0015] The aforementioned alloy resistance strip straightening device and its straightening method are equipped with multiple straighteners to perform straightening and shaping operations on the strip, and to roll the deformed parts multiple times to prevent the strip from springing back and deforming again. Each straightener is equipped with longitudinal rollers and transverse rollers to roll the alloy resistance strip in all directions, improving the straightening effect. The spacing between the opposing transverse rollers can be adjusted by U-shaped sliders, and the U-shaped sliders on each straightener do not interfere with each other, and can be flexibly adjusted according to the strip size to avoid jamming during the feeding process. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the alloy resistance material strip. Figure 2 This is a schematic diagram of the structure of the alloy resistance material strip straightening device; Figure 3 This is a front view of the straightener; Figure 4 This is a schematic diagram showing the disassembly of the straightener; Figure 5 This is a schematic diagram showing the fit between the alloy resistance strip and the transverse roller; Figure 6 This is a schematic diagram showing the interaction between the horizontal roller and the adjustment ruler; Figure 7 This is a schematic diagram showing the fit between the adjusting gear and the adjusting ruler; Figure 8 This is a schematic diagram of the support structure.

[0018] Reference numerals: 10, Alloy resistance strip straightening device; 20, Alloy resistance strip; 21, Resistor strip; 22, Copper strip; 100, Base; 110, Mounting groove; 200, Straightener; 210, Support; 211, Cross groove; 212, Slide groove; 220, U-shaped slider; 230, Longitudinal roller; 240, Transverse roller; 241, Groove; 250, Return spring; 260, Adjusting gear; 270, Baffle; 300, Adjusting ruler; 310, Reference surface; 311, External tooth; 312, Scale; 320, Inclined surface. 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 2 and Figure 3 This invention provides an alloy resistance strip straightening device 10, comprising: a base 100 and a plurality of straighteners 200. The plurality of straighteners 200 are spaced apart on the base 100 along the transmission direction of the alloy resistance strip 20; the base 100 is used to fix the straighteners 200, and the straighteners 200 perform straightening operations on the alloy resistance strip 20. Preferably, the base 100 has a mounting groove 110, and a bracket 210 is disposed within the mounting groove 110.

[0023] Please see Figure 3 and Figure 4The straightener 200 includes a bracket 210, a U-shaped slider 220, two opposing longitudinal rollers 230, and two opposing transverse rollers 240. The bracket 210 has a cross groove 211, within which both the longitudinal rollers 230 and the transverse rollers 240 are located. During straightening, the alloy resistance strip 20 passes through the center of the cross groove 211. At this time, the two opposing longitudinal rollers 230 roll the front and back sides of the alloy resistance strip. The two transverse rollers 240 roll the sides of the alloy resistance strip. Preferably, the transverse rollers 240 have grooves 241 into which the sides of the alloy resistance strip 20 extend. The longitudinal rollers 230 and the transverse rollers 240 straighten the outer periphery of the alloy resistance strip 20.

[0024] Please see Figure 4 and Figure 8 The bracket 210 has a slide groove 212 communicating with the cross groove 211. A U-shaped slider 220 is slidably disposed within the slide groove 212. One of the transverse rollers 240 is connected to the U-shaped slider 220, allowing the U-shaped slider 220 to drive the transverse roller 240 to slide along the slide groove 212. By increasing or decreasing the distance between the two transverse rollers 240, it is ensured that the transverse roller 240 can contact the side of the alloy resistance strip 20. Each straightener 200 is independent of each other, and the distance between the transverse rollers 240 on each straightener 200 can be flexibly adjusted according to the size of the alloy resistance strip 20. This ensures that the alloy resistance strip 20 can smoothly enter the straightening device even when it has a large bend, and also ensures that the transverse roller 240 can effectively contact the alloy resistance strip 20, guaranteeing the straightening effect.

[0025] Preferably, the straightener 200 further includes a baffle 270, which is disposed on the bracket 210 and extends to the opening of the slide groove 212 to block the slide groove 212 and prevent the U-shaped slider 220 from falling out of the slide groove 212 when it slides.

[0026] It should be noted that the degree of bending deformation on the alloy resistance strip 20 due to the transportation and laser welding processes is uncertain. The same bundle of alloy resistance strip 20 may simultaneously contain areas with large and small bends. If the transverse roller 240 is adjusted directly according to the area of ​​maximum bending on the alloy resistance strip 20, although the alloy resistance strip 20 can smoothly enter the straightener 200, the transverse roller 240 will not be able to contact the areas with small bends. If the transverse roller 240 is adjusted directly according to the standard width of the alloy resistance strip 20, the areas with large bends will still experience jamming when entering the straightener 200. To achieve better straightening results, the distance between the two transverse rollers 240 on each straightener 200 needs to gradually decrease along the transport direction of the alloy resistance strip 20. The spacing between the transverse rollers 240 on the first straightener 200 is sufficiently large to ensure that the alloy resistance strip 20 can smoothly enter the straightening device. As the spacing between the transverse rollers 240 in subsequent straighteners 200 gradually decreases, the bent portion is rolled over as it passes through these straighteners 200, reducing the bending amplitude with each straightening until it is completely straightened. This method of setting up the straighteners 200 ensures that the alloy resistance strip 20 can smoothly enter the straightening device while maintaining straightening accuracy. However, it requires adjusting the U-shaped sliders 220 on each straightener 200 individually. When replacing the alloy resistance strip 20 or changing to a different specification of alloy resistance strip 20, the straightening device needs to be readjusted according to the standard width of the target alloy resistance strip 20 and its maximum deformation size. Since there are multiple straighteners 200, the adjustment process is time-consuming and will affect the normal feeding of the alloy resistance strip.

[0027] Please see Figure 5 and Figure 6 To solve the above problems, the alloy resistance strip straightening device 10 also includes an adjustment ruler 300. The adjustment ruler 300 includes a reference surface 310 and an inclined surface 320, so that the thickness of the adjustment ruler 300 increases from one end to the other end, and the cross section of the adjustment ruler 300 is a right triangle.

[0028] Please see Figure 5 and Figure 6The adjusting ruler 300 passes through each slide groove 212, and the reference surface 310 is in contact with the inner wall of the slide groove 212. The inclined surface 320 faces the U-shaped slider 220. A return spring 250 is provided on the bracket 210. The return spring 250 is used to push the U-shaped slider 220 to slide along the slide groove 212 so that the U-shaped slider 220 abuts against the inclined surface 320. Since the inclined surface 320 is inclined to the reference surface 310, the sliding distance of the U-shaped slider 220 on each straightener 200 is not... Consistently, the closer the straightener 200 is to the end of the adjusting ruler 300, the smaller the sliding distance of its U-shaped slider 220 and the larger the gap between the two transverse rollers 240; the closer the straightener 200 is to the root of the adjusting ruler 300, the greater the sliding distance of its U-shaped slider 220 and the smaller the gap between the two transverse rollers 240, so that the gap between the two transverse rollers 240 in each straightener 200 can decrease along the transmission direction of the alloy resistance strip 20.

[0029] Please see Figure 5 and Figure 7 The straightener 200 is equipped with an adjusting gear 260, and the reference surface 310 is equipped with external teeth 311. The slide groove 212 is equipped with a clearance part that matches the external teeth 311. The adjusting gear 260 meshes with the external teeth 311. When the adjusting gear 260 rotates, it can drive the adjusting ruler 300 to move through the external teeth 311, allowing the operator to adjust the adjusting ruler 300 by moving the adjusting gear 260, thereby increasing or decreasing the distance between the transverse rollers 240.

[0030] Please see Figure 7 Preferably, the reference surface 310 is provided with a scale 312, which is used to indicate the thickness of the adjustment ruler 300. The operator can identify the sliding distance of the U-shaped slider 220 in the straightener 200 at the location of the scale through the scale 312.

[0031] This application also provides a straightening method based on the above-mentioned alloy resistance strip straightening device 10, which includes the following steps: Step 1: Identify the parts on the alloy resistance strip 20 that have obvious deformation, measure the width of the part, calculate the difference between the width value and the rated width value of the alloy resistance strip, and record it as the offset dimension. 【like Figure 1 As shown, the rated width of the alloy resistance strip 20 is denoted as L1, the width of the deformed portion is denoted as L2, and the offset dimension L = L2 - L1. The offset dimension represents the bending amplitude of the strip. If the offset dimension is 1 mm, then during the straightening operation, the portion needs to be bent 1 mm in the opposite direction. Step 2: Insert the adjusting ruler 300 through the groove 212 of each straightener 200, push each U-shaped slider 220 through the inclined surface 320, adjust the distance between the two transverse rollers 240 on each straightener 200, and the distance decreases along the transmission direction of the alloy resistance material strip 20. The adjustment ruler 300 passes through each straightener 200. Positioning is achieved by the reference surface 310 adhering to the inner wall of the slide 212. The inclined surface 320 pushes the U-shaped sliders 220 on each straightener 200 to translate, adjusting the distance between the two transverse rollers 240. Because the inclined surface 320 is inclined to the reference surface 310, the distance the U-shaped sliders 220 on each straightener 200 are pushed is different. This allows the distance between the two transverse rollers 240 in each straightener 200 to decrease gradually along the transmission direction of the alloy resistance strip 20, allowing the alloy resistance strip 20 to enter the straightening device from the side with the larger distance and be gradually straightened by subsequent straighteners 200. Step 3: Slide the adjustment ruler 300 so that the distance between the two transverse rollers 240 on the first straightener 200 is greater than the offset dimension; [To ensure that any deformed areas on the alloy resistance strip 20 can smoothly enter the first straightener 200, the two transverse rollers 240 on the straightener 200 perform the first rolling action, reducing the bending amplitude and allowing the bent parts to smoothly enter the next straightener 200.] Step 4: Feed the alloy resistance strip into the straightening device, so that the alloy resistance strip passes through each straightener 200 in sequence; When the alloy resistance strip 20 passes through the straightener 200, two longitudinal rollers 230 roll the front and back of the strip; two transverse rollers 240 roll the sides of the strip, performing all-round rolling on the outer periphery of the strip. Step 5: The alloy resistance strip is fed through the straighteners 200 in sequence, and the longitudinal rollers 230 roll the front and back of the strip, while the transverse rollers 240 roll both sides of the strip to complete the straightening operation.

[0032] [Because the spacing of the transverse rollers 240 of each straightener 200 decreases progressively along the conveying direction of the conveyor belt, the sections of the conveyor belt with larger bends first enter the straighteners 200 with larger transverse roller spacing, and then enter the straighteners 200 with smaller transverse roller spacing. During this process, the bend is gradually compressed until it is completely straightened. Each straightening step in this process eliminates only a small amount of bending deformation, avoiding the elastic rebound problem caused by a large reverse bend in one step. Simultaneously, as multiple straighteners 200 act sequentially, the residual internal stress within the conveyor belt is released step by step, resulting in a straight conveyor belt.] It should be noted that when changing the strip or straightening different specifications of alloy resistance strip 20, it is only necessary to drive the adjustment ruler 300 to move horizontally and use its inclined surface 320 to synchronously adjust the spacing distribution of the transverse rollers 240 in all straighteners 200. There is no need to adjust each U-shaped slider 220 one by one, which greatly shortens the debugging time.

[0033] The above-mentioned alloy resistance strip straightening device 10 and its straightening method have the following beneficial effects: 1. A single adjusting ruler 300 enables synchronous, precise, and progressive adjustment of the spacing between multiple straighteners 200, significantly improving debugging efficiency and adaptability. The adjusting ruler 300 passes through the grooves 212 of each straightener 200, and, in conjunction with the return spring 250, ensures that each U-shaped slider 220 is always in contact with the inclined surface. Since the thickness of the adjusting ruler 300 increases along its length, a single translation of the adjusting ruler 300 is sufficient to simultaneously change the spacing between the two transverse rollers 240 on all straighteners 200, with each spacing automatically decreasing along the conveyor belt direction. Operators do not need to adjust the U-shaped sliders 220 of each straightener 200 individually, nor rely on repeated trial adjustments based on experience. When changing to alloy resistance strips 20 of different specifications or curvatures, simply translating the adjusting ruler 300 to the corresponding scale 312 position according to the offset of the new strip is sufficient to set the spacing of all straighteners 200. This significantly shortens changeover debugging time and greatly improves production line changeover efficiency.

[0034] 2. The step-by-step decreasing straightening driven by the 300-meter adjustment ruler effectively suppresses springback after straightening, ensuring straightening accuracy.

[0035] The adjustable gauge 300 causes the spacing between the transverse rollers 240 on each straightener 200 to gradually decrease along the conveying direction of the conveyor belt, forming a straightening channel that is "wide at first and then narrow." The part of the conveyor belt with the largest curvature first enters the straightener 200 with the largest spacing, where the curvature is reduced after the initial rolling. Subsequently, it enters the subsequent straighteners 200 with smaller spacing, and the curvature is gradually compressed until it is completely straightened. In this process, each straightening eliminates only a small amount of bending deformation of the conveyor belt, avoiding the elastic rebound phenomenon caused by excessive reverse bending in traditional single-stage straightening. The adjustable gauge 300 enables this multi-stage, progressive straightening strategy to be reliably achieved with a single adjustment, ensuring the stability of the straightening effect and avoiding repeated straightening caused by springback.

[0036] 3. By adjusting the distance ruler 300, the distance between the two transverse rollers 240 on the first straightener 200 located on the outermost side of the conveying direction can be made greater than the maximum offset dimension of the material strip. Even if the material strip has a large bending radius, its bent protrusions can easily enter between the two transverse rollers 240 without jamming. This design completely eliminates the need for manual pre-correction of the bent material strip, enabling the straightening device to directly adapt to material strips with large differences in bending radius, thus improving the versatility of the device.

[0037] 4. The scale 312 on the reference surface 310 directly indicates the thickness of the adjusting ruler 300 at different positions, reflecting the spacing of the transverse rollers 240 on the corresponding straightener 200. Based on the measured offset, the operator can smoothly move the adjusting ruler 300 by engaging the adjusting gear 260 with the external gear 311, and quickly set the spacing of the first straightener 200 to the desired value by referring to the scale 312. The operation process is simple and intuitive, reducing the experience required of the operator and improving the consistency and repeatability of the adjustment.

[0038] 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 straightening device for alloy resistance material strips, characterized in that, include: Base and multiple straighteners; Multiple straighteners are spaced apart on the base along the transmission direction of the alloy resistance strip; The straightener includes a bracket, a U-shaped slider, two opposing longitudinal rollers and two opposing transverse rollers. The bracket has a cross groove, and the longitudinal rollers and the transverse rollers are located in the cross groove. The two longitudinal rollers are used to roll the front and back sides of the alloy resistance strip; the two transverse rollers are used to roll the two sides of the alloy resistance strip. The bracket is provided with a sliding groove communicating with the cross groove. The U-shaped slider is slidably disposed in the sliding groove. One of the transverse rollers is connected to the U-shaped slider. The sliding of the U-shaped slider is used to increase or decrease the distance between the two transverse rollers.

2. The alloy resistance material strip straightening device according to claim 1, characterized in that, It also includes an adjustable ruler, which includes a reference surface and an inclined surface. The adjustable ruler passes through each of the slide grooves, and the reference surface is in contact with the inner wall of the slide groove, while the inclined surface faces the U-shaped slider. The bracket is equipped with a return spring, which is used to push the U-shaped slider to slide along the groove so that the U-shaped slider abuts against the inclined surface.

3. The alloy resistance strip straightening device according to claim 2, characterized in that, The straightener is equipped with an adjustable gear, the reference surface is provided with external teeth, and the slide groove is provided with a clearance part that matches the external teeth. The adjustable gear meshes with the external teeth.

4. The alloy resistance strip straightening device according to claim 2, characterized in that, The thickness of the adjustable ruler increases from one end to the other.

5. The alloy resistance material strip straightening device according to claim 4, characterized in that, The reference surface is provided with a scale, which is used to indicate the thickness of the adjustment ruler.

6. The alloy resistance strip straightening device according to claim 1, characterized in that, The cross-section of the adjustable ruler is a right-angled triangle.

7. The alloy resistance material strip straightening device according to claim 1, characterized in that, The base has an installation groove, and the bracket is disposed in the installation groove.

8. The alloy resistance strip straightening device according to claim 1, characterized in that, The transverse roller has a groove, and the side of the alloy resistance strip extends into the groove.

9. The alloy resistance material strip straightening device according to claim 1, characterized in that, The straightener also includes a baffle plate, which is disposed on the bracket and extends to the opening of the groove.

10. A straightening method, based on the alloy resistance strip straightening device according to any one of claims 2 to 9, characterized in that, Includes the following steps: Step 1: Identify the areas on the alloy resistance strip that show obvious deformation, measure the width of these areas, and calculate the difference between this width and the rated width of the alloy resistance strip. Record this difference as the offset dimension. Step 2: Insert the adjustment ruler through the groove of each straightener, push each U-shaped slider with the inclined surface to adjust the distance between the two transverse rollers on each straightener, and the distance decreases along the transmission direction of the alloy resistance strip. Step 3: Slide the adjustment ruler to make the distance between the two horizontal rollers on the first straightener greater than the offset dimension; Step 4: Feed the alloy resistance strip into the straightening device, so that the alloy resistance strip passes through each straightener in sequence; Step 5: The alloy resistance strip is fed through the straighteners so that the part to be straightened passes through each straightener in sequence. The longitudinal rollers roll the front and back of the strip, and the transverse rollers roll the sides of the strip to complete the straightening operation.

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