Lead cutting and flattening apparatus

Abstract

The utility model discloses a kind of lead cutting and flattening equipment, it is related to machining equipment technical field, and the lead cutting and flattening equipment includes feeding module and cutting and flattening module;Feeding module is used to transport lead;Cutting and flattening module includes upper die, lower die and first driving part, lower die is located at the discharge side of feeding module, upper die and lower die are arranged in upper and lower interval, first driving part drives upper die to lift, the side of lower die towards upper die is equipped with lower cutter, the side of upper die towards lower die is equipped with punch head and upper cutter, upper cutter is set close to feeding module, upper cutter is set corresponding lower cutter.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment technology, and in particular to a lead wire cutting and flattening device. Background Technology

[0002] In the field of electronic component manufacturing, leads are a critical conductive connection component, and their processing accuracy and efficiency directly affect product reliability and production costs. Leads typically require cutting and flattening before assembly to meet specific size and shape requirements. In existing technologies, lead cutting and flattening operations are mostly performed using separate equipment, such as a series of independent cutting and flattening machines. This approach not only occupies a large space but also increases positioning errors during lead transfer, leading to poor processing consistency and low production efficiency. Utility Model Content

[0003] The lead wire cutting and flattening device proposed in this utility model includes: A feeding module, which is used to feed leads; A cutting and flattening module includes an upper die, a lower die, and a first driving component. The lower die is located on the discharge side of the feeding module. The upper die and the lower die are spaced apart vertically. The first driving component drives the upper die to move up and down. The lower die has a lower cutter on the side facing the upper die. The upper die has a punch head and an upper cutter on the side facing the lower die. The upper cutter is located close to the feeding module and corresponds to the lower cutter. Attached Figure Description

[0004] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0005] Figure 1 A schematic diagram of an embodiment of the lead wire cutting and flattening device provided by this utility model; Figure 2 A schematic diagram of another embodiment of the lead wire cutting and flattening device provided by this utility model; Figure 3 A schematic diagram of the pressed state of an embodiment of the cutting and flattening module; Figure 4 A schematic diagram of the pressed state of another embodiment of the cutting and flattening module; Figure 5 A schematic diagram of the material pressing state of an embodiment of the cutting and flattening module; Figure 6 A schematic diagram of the material pressing state of another embodiment of the cutting and flattening module; Figure 7 A schematic diagram of the material-pressing state in another embodiment of the cutting and flattening module; Figure 8 This is a schematic diagram of one embodiment of the feeding module.

[0006] Explanation of icon numbers: 1000. Lead wire cutting and flattening equipment; 100. Feeding module; 200. Cutting and flattening module; 300. Unloading module; 400. Feeding module; 500. Guiding module; 600. Straightening module; 1. Feeding motor; 2. Wire spool; 3. Upper die; 31. Guide post; 4. Lower die; 41. First clearance groove; 42. Second clearance groove; 43. Protrusion; 44. Guide sleeve; 5. First driving component; 6. Lower cutter; 7. Punching head; 8. Upper cutter; 9. Clamping claw; 10. Linkage mechanism; 11. Unloading plate; 12. Second driving component; 13. First clamping component; 14. Second clamping component; 15. Lead wire.

[0007] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0008] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0009] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0010] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0011] This utility model proposes a lead wire cutting and flattening device 1000.

[0012] Please see Figures 1 to 7 In one embodiment of this utility model, the lead wire cutting and flattening device 1000 includes a feeding module 100 and a cutting and flattening module 200; the feeding module 100 is used to convey the lead wire 15; the cutting and flattening module 200 includes an upper mold 3, a lower mold 4 and a first driving member 5, the lower mold 4 is located on the discharge side of the feeding module 100, the upper mold 3 and the lower mold 4 are arranged vertically at intervals, the first driving member 5 drives the upper mold 3 to rise and fall, the lower mold 4 is provided with a lower cutter 6 on the side facing the upper mold 3, the upper mold 3 is provided with a punch head 7 and an upper cutter 8 on the side facing the lower mold 4, the upper cutter 8 is arranged close to the feeding module 100, and the upper cutter 8 is arranged corresponding to the lower cutter 6.

[0013] The feeding module 100 includes a feeding motor 1 and a bobbin 2. The bobbin 2 is used to carry the coiled lead wire 15, while the feeding motor 1 serves as a power source, driving the bobbin 2 to rotate through a drive wheel system and feeding the lead wire 15 to the cutting and flattening module 200 at a controllable speed.

[0014] The cutting and flattening module 200 includes an upper die 3, a lower die 4, and a first driving component 5. The lower die 4 is fixedly installed on the discharge side of the feeding module 100 to receive the lead wire 15 fed by the feeding module 100. The upper die 3 and the lower die 4 are spaced apart vertically, forming a processing area between them. The first driving component 5 drives the upper die 3 to perform precise lifting and lowering movements. The first driving component 5 can be a hydraulic cylinder, a pneumatic cylinder, or a servo motor, etc.

[0015] In the initial state, the upper die 3 is in the raised position under the drive of the first drive unit 5. The lead wire 15 is conveyed by the feeding module 100 and passes through the gap between the upper die 3 and the lower die 4 until it reaches the predetermined length. Then, the first drive unit 5 drives the upper die 3 to move downward. The upper cutter 8 and the lower cutter 6 interact first to cut the lead wire 15. As the upper die 3 continues to descend, the punch head 7, located at the rear of the cutting station, contacts the cut lead wire 15 segment (usually the end that needs to be flattened), causing it to undergo plastic deformation and achieve the purpose of flattening. Finally, the upper die 3 rises back, completing one work cycle. In addition, the lower cutter 6 also has a V-shaped feed notch to facilitate the entry of the lead wire 15.

[0016] In the technical solution of this utility model, by integrating the cutting and flattening functions into the same mold and driving them with the same first driving component 5, both operations can be completed within one stroke. This avoids intermediate transfer, positioning, and waiting time in step-by-step processing, greatly improving production efficiency.

[0017] Furthermore, in one embodiment of this utility model, please refer to... Figure 3 , Figure 5 as well as Figure 6The lead wire cutting and flattening device 1000 also includes a feeding module 300, which includes a gripper 9, a linkage mechanism 10, and a feeding plate 11. The gripper 9 is located on the side of the upper die 3 facing the lower die 4, between the punch head 7 and the upper cutter 8. The gripper 9 is used to grip or release the lead wire 15. The linkage mechanism 10 is hinged to the upper die 3 and the lower die 4 respectively. The feeding plate 11 is located at the output end of the linkage mechanism 10, which is used to move the feeding plate 11 closer to or away from the gripper 9. The gripper 9 is located between the punch head 7 and the upper cutter 8, meaning that what the gripper 9 grips is the section of lead wire 15 that has been cut by the upper cutter 8 and the lower cutter 6 but has not yet been flattened. This position ensures that the lead wire 15 can be immediately captured and positioned after cutting, ensuring the accuracy of the flattening position. The gripper 9 is gripped and released under the drive of a finger cylinder. The two ends of the linkage mechanism 10 are hinged to the fixed lower die 4 and the movable upper die 3, respectively, and the blanking plate 11 is installed at the output end of the linkage mechanism 10. Through the lifting and lowering movement of the upper die 3, the linkage mechanism 10 is driven, thereby causing the blanking plate 11 to perform specific movements, allowing it to move closer to or further away from the area where the gripper 9 is located. When the upper die 3 moves downwards to cut and flatten, it simultaneously drives the linkage mechanism 10, causing the linkage mechanism 10 to move the blanking plate 11 away from the gripper 9, making room for the processing. When processing is completed and the upper die 3 rises upwards, it drives the blanking plate 11 to move closer to the gripper 9 via the linkage mechanism 10. When the upper die 3 rises to its highest point and the gripper 9 opens to release the flattened lead wire 15, the blanking plate 11 moves precisely below the gripper 9. At this time, the blanking plate 11 can act as a bearing surface to catch the falling lead wire 15, or as a guiding surface to guide the lead wire 15 to the receiving frame. The introduction of the unloading module 300 enables the automatic removal and collection of the lead wire 15 after processing, thus improving production efficiency.

[0018] Specifically, in one embodiment of this utility model, the linkage structure includes an output rod, two connecting rods, and two auxiliary rods. The two connecting rods are hinged to the upper mold 3 and the lower mold 4, respectively, and the middle parts of the two connecting rods are hinged to each other. One end of the two auxiliary rods is hinged to each other, and the other end of the two auxiliary rods is hinged to the ends of the two connecting rods, respectively. The output rod is connected to the hinge points of the two connecting rods and the hinge points of the two auxiliary rods. The unloading plate 11 is connected to the output rod. When the upper mold 3 rises and falls, the interaction between the two connecting rods at their middle hinge points transforms the large vertical movement of the upper mold 3 into a complex but definite planar movement at their middle hinge points. The two auxiliary rods constrain and stabilize this movement. Through the composite linkage system composed of the two connecting rods and the two auxiliary rods, the movement path of the output rod can be precisely controlled, thereby controlling the movement path of the unloading plate 11. This design ensures that during unloading, the unloading plate 11 can accurately move to the optimal receiving position directly below the gripper 9; and during processing, it can promptly clear space.

[0019] Furthermore, in one embodiment of this utility model, please refer to... Figure 3 , Figure 5 , Figure 6 as well as Figure 7 The lower die 4 has a first clearance groove 41, and the gripper 9 is positioned corresponding to the first clearance groove 41. When the upper die 3 moves the gripper 9 down to the lowest point, the gripper 9 needs to extend below the working plane of the lower die 4 in order to firmly hold the lead wire 15. The first clearance groove 41 is the space reserved for the gripper 9. Similarly, the lower die 4 has a second clearance groove 42, and the unloading plate 11 is positioned corresponding to the second clearance groove 42. When the upper die 3 moves down to the lowest point, one end of the unloading plate 11 is located in the second clearance groove 42. The second clearance groove 42 ensures that when the unloading plate 11 performs the unloading action, the unloading plate 11 can extend below the gripper 9, thus being in the optimal unloading position, and will not collide with the lower die 4. In this way, more complex horizontal and vertical compound movements can be achieved within a limited vertical space, making the equipment structure more compact.

[0020] Specifically, in one embodiment of this utility model, please refer to... Figure 7 The lower die 4 has two protrusions 43 on the side facing the upper die 3, forming a limiting channel between them for the lead wire 15 to pass through. When the upper die 3 presses against the lower die 4, the two protrusions 43 are located between the stamping head 7 and the upper cutter 8. The two protrusions 43 extend upwards from the working plane of the lower die 4; they can be cuboids, cylinders, or other suitable shapes, parallel to each other and spaced a certain distance apart, thus forming a narrow limiting channel between them with a cross-sectional shape matching the lead wire 15. After the lead wire 15 is conveyed from the feeding module 100, it will directly pass through and be placed within this limiting channel. This channel completely constrains the lead wire 15 in the horizontal direction, allowing it to slide only along the length of the channel, preventing lateral movement and ensuring precise positioning when it reaches the processing position. The protrusion 43 has a guide slope on the side facing the feeding module 100. When the lead wire 15 is conveyed from the feeding module 100 and is about to enter the limiting channel formed by the two protrusions 43, its end may have a slight axial or radial misalignment with the side wall of the protrusion 43. At this time, the end of the lead wire 15 will first contact the guide slope, and under the action of the continued forward thrust, the lead wire 15 will fall naturally and smoothly into the limiting channel along the slope of the slope.

[0021] To ensure machining accuracy, please refer to one embodiment of this utility model. Figure 3The lower die 4 is equipped with a guide sleeve 44, and the upper die 3 is equipped with a guide post 31, which passes through the guide sleeve 44. When the first driving component 5 drives the upper die 3 downward, the guide post 31 begins to slide under the constraint of the guide sleeve 44, thereby guiding the downward movement of the upper die 3 and ensuring that the upper cutter 8 and the lower cutter 6 are precisely aligned in each stroke; at the same time, it also ensures that the stamping head 7 can accurately press against the corresponding position of the lower die 4. Multiple sets of guide posts 31 and guide sleeves 44 can be provided for better positioning and guiding effects.

[0022] Furthermore, in one embodiment of this utility model, please refer to... Figure 2 and Figure 8 The lead wire cutting and flattening device 1000 also includes a feeding module 400, which includes a second driving member 12 and a first clamping member 13. The first clamping member 13 is located between the feeding module 100 and the cutting and flattening module 200. The first clamping member 13 is used to clamp or release the lead wire 15. The second driving member 12 drives the first clamping member 13 to move between the feeding module 100 and the cutting and flattening module 200. The first clamping member 13 can be a pneumatic finger, an electromagnetic gripper, etc., with fast response and reliable clamping force. The second driving member 12 can be a cylinder, a lead screw driven by a servo motor, or a linear motor, used to drive the first clamping member 13 to reciprocate linearly between the feeding module 100 and the cutting and flattening module 200. After the feeding module 100 continuously conveys the lead wire 15 a certain distance, the first clamping member 13 clamps the lead wire 15 near the discharge port of the feeding module 100. The second driving member 12 then activates, driving the first clamping member 13, which is holding the lead wire 15, to move precisely a preset fixed stroke towards the cutting and flattening module 200. This stroke length is the cutting length of the lead wire 15. Finally, the second driving member 12 drives the first clamping member 13, which has released the lead wire 15, back to the starting position on the feeding module 100 side, ready for the next feeding cycle. Through the precise position control of the second driving member 12, the feeding length for each cycle can be controlled extremely accurately, fundamentally ensuring the consistency of the length of each section of the cut lead wire 15.

[0023] Furthermore, in one embodiment of this utility model, please refer to... Figure 2 The lead wire cutting and flattening device 1000 also includes a second clamping member 14, which is located between the feeding module 100 and the first clamping member 13. The second clamping member 14 is used to clamp or release the lead wire 15. The second clamping member 14 is closer to the feeding module 100 than the first clamping member 13. Thus, during the process of the second driving member 12 driving the first clamping member 13, which has released the lead wire 15, back to the starting position on the feeding module 100 side, the second clamping member 14 can clamp the lead wire 15, avoiding possible problems such as the lead wire 15 retraction, loosening, or unstable position, and further improving the feeding accuracy and reliability.

[0024] Specifically, in one embodiment of this utility model, please refer to... Figure 4 The lead wire cutting and flattening device 1000 also includes a guide module 500, which is located between the feeding module 100 and the cutting and flattening module 200, and is positioned close to the cutting and flattening module 200. The guide module 500 has a guide rod with a guide hole through it for the lead wire 15 to pass through. After the lead wire 15 is fed out from the feeding module 100, it first passes through the guide hole in the guide rod and then enters the cutting and flattening module 200. This guide hole spatially constrains the lead wire 15, effectively eliminating any minor bending, shaking, or radial offset that may occur during the conveying process. Furthermore, because the guide module 500 is very close to the processing point, the section of lead wire 15 from the guide hole outlet to the cutting point forms a short, effectively constrained "cantilever," which greatly improves the rigidity of the lead wire 15 end during processing, preventing uncontrollable vibration or deflection when subjected to cutting and flattening forces. Furthermore, a guide surface is formed at one end of the guide rod facing the feeding module 100. This guide surface smoothly transitions and connects to the inner wall of the guide hole. Thus, during initial threading, the operator only needs to point the lead wire 15 approximately toward this connecting guide surface. When pushing forward, the lead wire 15 will naturally contact the inclined or curved guide surface and then slide into the guide hole along the guide surface.

[0025] It is understood that the lead wire 15 conveyed by the spool 2 is bent. In order to straighten the lead wire 15, please refer to one embodiment of this utility model. Figure 1 and Figure 2 The lead wire cutting and flattening device 1000 also includes a straightening module 600. The straightening module 600 includes a mounting base and two sets of rollers. The mounting base is located between the feeding module 100 and the cutting and flattening module 200. The two sets of rollers are spaced apart on the mounting base to form a wire passage channel for the lead wire 15 to pass through. Each set of rollers typically consists of two or more rollers arranged side-by-side, with the two sets of rollers staggered. The two sets of rollers work together to form a wire passage channel for the lead wire 15 to pass through. The bent lead wire 15 is led out from the spool 2 of the feeding module 100 and fed into the wire passage channel formed by the two sets of rollers. The two sets of rollers constitute two forced constraint points. When the bent lead wire 15 passes through, the first set of rollers applies an initial straightening force to it, causing it to bend in the opposite direction. Then, the second set of rollers applies an opposite straightening force to further correct the residual bending. This eliminates the initial bending of the lead wire 15, making the lead wire 15 straight after leaving the rollers, thus ensuring the dimensional accuracy of the final product.

[0026] Furthermore, in one embodiment of this utility model, please refer to... Figure 2The lead wire cutting and flattening device 1000 includes two straightening modules 600, which are spaced apart. One straightening module 600 has two sets of rollers spaced vertically, while the other straightening module 600 has two sets of rollers spaced horizontally. The two straightening modules 600 are spaced apart along the conveying path of the lead wire 15, and the lead wire 15 passes through these two straightening modules 600 sequentially during conveying. In the vertically spaced straightening module 600, one set of rollers is positioned above the other. When the lead wire 15 passes through, this mechanism primarily applies a vertical force to the lead wire 15 to correct its bending in the vertical plane. In the horizontally spaced straightening module 600, one set of rollers is positioned to the left and the other to the right. When the lead wire 15 passes through, this mechanism primarily applies a horizontal force to the lead wire 15 to correct its bending in the horizontal plane. By using two orthogonally arranged straightening modules 600, the bending and twisting of the lead wire 15 in different directions are fully corrected, ensuring that the lead wire 15 becomes straight before entering the cutting and flattening module 200, thus guaranteeing the dimensional accuracy of the final product.

[0027] In this embodiment of the invention, the motor-driven bobbin 2 of the feeding module 100 automatically feeds the lead wire 15. The lead wire 15 first passes through a straightening system composed of two orthogonally arranged straightening modules 600. Vertically arranged rollers correct the bending of the lead wire 15 in the vertical plane, while horizontally arranged rollers correct the bending in the horizontal direction. After straightening, the lead wire 15 enters a precision length-determining feeding system where the second clamping member 14 and the first clamping member 13 work together. The second clamping member 14 fixes the lead wire 15 material at the feeding end, and the first clamping member 13 clamps the front end of the lead wire 15. The second driving member 12 precisely drives the lead wire 15 to move a set stroke, accurately feeding it to the processing station. During this process, the alternating clamping action of the two clamping members effectively prevents the lead wire 15 from retracting, ensuring feeding accuracy. Before entering the processing stage, the lead wire 15 must pass through the guide holes of the guide module 500 and the limiting channel on the lower die 4. These two levels of guiding systems work together to ensure that the lead wire 15 arrives at the cutting position in the optimal posture. In the cutting and flattening process, the first drive component 5 drives the upper die 3 downward. Through the precise cooperation of multiple guide pillars 31 and guide sleeves 44, the upper die 3 is guaranteed to move vertically and stably. The upper cutter 8 and the lower cutter 6 first complete the cutting of the lead wire 15. Then, the gripper 9 located between the stamping head 7 and the upper cutter 8 firmly holds the lead wire 15 segment. Next, the stamping head 7 precisely flattens and shapes it. Finally, as the upper die 3 rises, the gripper 9 releases the processed lead wire 15. At the same time, the connecting rod mechanism 10 drives the unloading plate 11 to extend, accurately pick up and transfer the workpiece, and complete the automated unloading. The modules of the entire system work in a highly coordinated manner, realizing fully automated and high-precision processing from the lead wire 15 raw material to the formed product. In addition, a guiding mechanism similar to the guiding module 500 can be set between the feeding module 100 and the straightening module 600, as well as in the straightening module 600 and the second clamping member 14, to improve the feeding accuracy.

[0028] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A lead wire cutting and flattening device, characterized in that, include: A feeding module, which is used to feed leads; A cutting and flattening module includes an upper die, a lower die, and a first driving component. The lower die is located on the discharge side of the feeding module. The upper die and the lower die are spaced apart vertically. The first driving component drives the upper die to move up and down. The lower die has a lower cutter on the side facing the upper die. The upper die has a punch head and an upper cutter on the side facing the lower die. The upper cutter is located close to the feeding module and corresponds to the lower cutter.

2. The lead wire cutting and flattening device as described in claim 1, characterized in that, The lead wire cutting and flattening equipment also includes a feeding module, which includes grippers, a linkage mechanism, and a feeding plate. The gripper is located on the side of the upper die facing the lower die, between the stamping head and the upper cutter, and is used to grip or release the lead wire. The linkage mechanism is hinged to the upper die and the lower die respectively. The blanking plate is located at the output end of the linkage mechanism, and the linkage mechanism is used to drive the blanking plate to move closer to or away from the gripper.

3. The lead wire cutting and flattening device as described in claim 2, characterized in that, The lower mold has a first clearance groove, and the gripper is configured corresponding to the first clearance groove; and / or The lower mold has a second clearance groove, and the blanking plate is provided corresponding to the second clearance groove.

4. The lead wire cutting and flattening device as described in any one of claims 1 to 3, characterized in that, The lower die has two protrusions on the side facing the upper die, and a limiting channel is formed between the two protrusions for the lead wire to pass through. When the upper die presses against the lower die, the two protrusions are located between the punch head and the upper cutter.

5. The lead wire cutting and flattening device as described in any one of claims 1 to 3, characterized in that, The lower mold is provided with a guide sleeve, and the upper mold is provided with a guide post, which passes through the guide sleeve.

6. The lead wire cutting and flattening device as described in any one of claims 1 to 3, characterized in that, The lead wire cutting and flattening device further includes a feeding module, which includes a second driving member and a first clamping member. The first clamping member is located between the feeding module and the cutting and flattening module. The first clamping member is used to clamp or release the lead wire. The second driving member drives the first clamping member to move between the feeding module and the cutting and flattening module.

7. The lead wire cutting and flattening device as described in claim 6, characterized in that, The lead wire cutting and flattening device further includes a second clamping member, which is located between the feeding module and the first clamping member, and is used to clamp or release the lead wire.

8. The lead wire cutting and flattening device as described in any one of claims 1 to 3, characterized in that, The lead wire cutting and flattening equipment also includes a guide module, which is located between the feeding module and the cutting and flattening module and is disposed close to the cutting and flattening module. The guide module has a guide rod, and the guide rod has a guide hole through the guide rod for the lead wire to pass through.

9. The lead wire cutting and flattening device as described in any one of claims 1 to 3, characterized in that, The lead wire cutting and flattening equipment also includes a straightening module, which includes a mounting base and two sets of rollers. The mounting base is located between the feeding module and the cutting and flattening module. The two sets of rollers are spaced apart on the mounting base to form a wire passage channel for lead wires to pass through.

10. The lead wire cutting and flattening device as described in claim 9, characterized in that, The lead wire cutting and flattening device includes two straightening modules, which are spaced apart. In one straightening module, the two sets of rollers are spaced apart in the vertical direction, and in the other straightening module, the two sets of rollers are spaced apart in the horizontal direction.

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