Novel foil crack processing device capable of preventing foil head from being broken

Abstract

The utility model belongs to the technical field of formed foil production, particularly relates to a novel foil crack processing device capable of preventing a foil head from being broken, and solves the problem that a foil head connecting section is possibly broken due to an overlarge wrap angle during tape running in the process of bending a foil to process cracks. The novel foil crack processing device capable of preventing the foil head from being broken comprises a rack and two parallel foil passing rollers rotationally connected to the rack, two small rollers are arranged between the foil passing rollers in parallel, a rotation amplitude control mechanism is arranged between the small rollers and the rack, and the rotation amplitude control mechanism is connected with the rack. And the included angle between the radial connecting line of the two small rollers and the radial connecting line of the two foil passing rollers can be adjusted, and the rack is further provided with a foil thickness detection structure located on the upstream sides of the small rollers. The problem that the foil head connecting section is broken when the foil is bent to process cracks is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemically formed foil production, in particular to a novel foil crack processing device for preventing foil head breakage. Background Art

[0002] Formed foil is a material specifically used to make the positive and negative electrodes of aluminum electrolytic capacitors. It is a key raw material for aluminum electrolytic capacitors. Formed foil uses plain foil as its primary material and is formed through a series of processing steps, including etching (or lamination, compounding, etc.) and forming. Currently, with the development of electronic products towards miniaturization and integration, miniaturization is also an inevitable trend in the development of aluminum electrolytic capacitors. While ensuring electrical performance, the size of aluminum electrolytic capacitors must be minimized. Therefore, the bending resistance of formed foil is also an important criterion for measuring the mechanical properties of formed foil products. To improve this bending resistance, cracks are often machined into the surface of the foil to achieve this.

[0003] At the intersection of the foil rolls, there is often a thick foil head connecting section, which is mostly connected by hammer riveting or other methods. However, the crack processing device in the existing technology is unable to properly adjust the bending degree of the foil head connecting section when inputting the crack processing. The problem of foil head breakage due to excessive wrap angle may occur, and stable operation cannot be guaranteed. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems in the prior art and to propose a novel foil crack processing device which can prevent the foil head from breaking.

[0005] In order to achieve the purpose of innovation of this utility model, the following technical solutions can be used:

[0006] A novel foil crack processing device for preventing foil head breakage comprises a frame and two foil-passing rollers rotatably connected to the frame, two small rollers are arranged in parallel between the foil-passing rollers, a rotation amplitude control mechanism is provided between the small rollers and the frame, which can adjust the angle between the radial connection line of the two small rollers and the radial connection line of the two foil-passing rollers, and the frame is also provided with a foil thickness detection structure located on the upstream side of the small rollers.

[0007] The foil crack processing device of the present invention is mainly used for processing cracks on the surface of the foil to improve its bending performance. The foil is input from the foil-passing roller and output from the other foil-passing roller after passing the small roller. The two small rollers are located on both sides of the line connecting the two foil-passing rollers, so that the foil is conveyed in a folded line manner when conveyed between them, and crack processing is achieved in the process of bending during conveying, thereby improving the bending resistance of the foil. The rotation amplitude control mechanism is used to control the rotation amplitude of the two small rollers, that is, to adjust the spacing between the small roller and the line connecting the two foil-passing rollers, so as to realize the control of the bending degree during conveying. In addition, a foil thickness detection structure is also provided on the upstream side for detecting the thickness of the foil to be bent, especially for detecting whether it is the foil head connecting section of the two foil rolls. When the foil head connecting section enters, the bending degree of the conveying path is reduced to avoid the foil head connecting section from breaking due to excessive wrap angle during conveying.

[0008] In the above-mentioned new foil crack processing device for preventing foil head breakage, the rotation amplitude control mechanism includes a connecting seat rotatably connected to both sides of the frame through a connecting shaft, the ends of the small rollers are rotatably connected to the connecting seat, and the two small rollers are evenly distributed circumferentially with the connecting shaft as the center, and the connecting seat is connected to the rotation drive structure.

[0009] The small roller is arranged between two parallel and opposite connecting seats. The connecting seats can rotate under the drive of the rotating drive structure, thereby realizing the up and down control of the small roller. Moreover, the two small rollers are respectively located on the rising side and the falling side when the connecting seat rotates, thereby realizing the control of the bending degree of the belt path.

[0010] In the above-mentioned new foil crack processing device for preventing foil head breakage, the rotation drive structure includes a circumferential drive, and driven teeth are evenly distributed circumferentially on part or all of the outer circumference of the connecting seat. The driven teeth are engaged with the transmission gear, and the transmission gear is rotatably connected to the frame through a transmission shaft. The transmission shaft is passed through the frame, and the driving gear of the circumferential drive is engaged with the transmission gear.

[0011] The circumferential drive is used to provide driving force for the rotation of the connecting seat. Its output end realizes the transmission of the rotation of the connecting seat through the driving gear and the transmission gear. There are two transmission gears, which are fixed at both ends of the transmission shaft, that is, the rotation is synchronized, realizing the effect of synchronous driving of the rotation of the two connecting seats.

[0012] In the above-mentioned new foil crack processing device for preventing foil head breakage, the connecting seat includes a circular large gear, the driven teeth are distributed on the outer circumference of the large gear, a small roller connecting hole is provided on the inner side of the large gear, the small roller is rotatably connected to the small roller connecting hole through a bearing, and the connecting shaft passes through the center hole of the large gear.

[0013] The connecting seat can be in the form of a gear to reduce processing costs. The small roller connecting hole on the inner side of the large gear is used to connect the small roller. Moreover, the small roller connecting hole can be in the form of a blind hole. The two ends of the small roller are axially limited between the bottoms of the two small roller connecting holes to prevent them from falling out.

[0014] In the above-mentioned new foil crack processing device for preventing foil head breakage, the rotation drive structure includes a linear drive cylinder whose cylinder body is hingedly connected to the frame, and the output end of the linear drive cylinder is hingedly connected to the non-center position outside the connecting seat, which can drive the connecting seat to rotate.

[0015] As another feasible solution, the rotation of the connecting seat can also be achieved through a linear drive cylinder. The output shaft of the linear drive cylinder is connected to the side of the connecting seat, and the connecting shaft is not on the extension line of the output shaft, ensuring the telescopic action of the output shaft to drive the rotation of the connecting seat.

[0016] In the above-mentioned new foil crack processing device for preventing foil head breakage, the frame includes two vertically arranged side panels, the side panels are passed through both ends of the connecting shaft, the connecting seat is located on the outside of the side panels and is rotatably connected to the outer end of the connecting shaft through a bearing, two arc-shaped clearance grooves are provided on the side panels, and the small roller is passed through the arc-shaped clearance groove.

[0017] The connecting shaft is set on the side plate of the frame, and the connecting seat is located on the outside of the side plate to avoid interference with the foil on the tape. The arc-shaped clearance groove on the side plate is used for the passage of the small roller to ensure the connection between the small roller and the connecting seat.

[0018] In the above-mentioned new foil crack processing device for preventing foil head breakage, an L-shaped limit plate is detachably provided on the frame, an arc-shaped limit groove is penetrated through the vertical surface of the limit plate, and a limit column is axially provided at a non-center position of the outer end of the connecting seat, and the limit column is penetrated through the arc-shaped limit groove.

[0019] The limit column on the connecting seat slides in the arc-shaped limit groove of the L-shaped limit plate. The arc-shaped limit groove limits the moving path of the limit column, thereby limiting the maximum rotation angle of the connecting seat and ensuring the normal tape running of the foil. Moreover, the horizontal surface of the L-shaped limit plate can be removably fixed by bolts, etc., which is convenient for disassembly and replacement.

[0020] In the above-mentioned new foil crack processing device for preventing foil head breakage, the foil thickness detection structure includes at least one group of thickness sensors, the thickness sensor is fixed on the frame and is located at least on the upstream side of the upstream foil roller, and the thickness sensor includes a U-shaped detection head located in the width direction of the foil, and the side of the foil passes through the U-shaped detection head.

[0021] The thickness sensor uses a U-shaped detection head to measure thickness. The side of the foil is located within the notch of the U-shaped detection head. The thickness sensor is located upstream of the upstream foil feed roller. Variations in the bending degree of the foil during transport do not affect the coordination of the U-shaped detection head. Furthermore, a second set of thickness sensors can be provided, located downstream of the downstream foil feed roller, to detect whether the foil head connecting section has been output, providing a basis for the operation of the rotation amplitude control mechanism. The specific structure and detection principle of the thickness sensor are common knowledge and will not be elaborated on in detail.

[0022] In the above-mentioned new foil crack processing device for preventing foil head breakage, the small rollers are symmetrically distributed on both sides of the rotation amplitude control mechanism, and the foil is wound around the upstream foil roller, two small rollers and the downstream foil roller in a zigzag manner.

[0023] The foil passes around each roller in a zigzag manner, and its contact surface with the two foil-passing rollers is located on two opposite sides, so that when the foil rotates until the line connecting the two small rollers is in the same direction as the line connecting the foil-passing rollers, the foil is transmitted between the two foil-passing rollers in an interlaced manner and is evenly stressed.

[0024] The novel foil crack processing device for preventing foil head breakage further includes a PLC control board and an operation panel. The PLC control board is electrically connected to the operation panel, the foil thickness detection structure, and the driver of the rotation amplitude control mechanism respectively.

[0025] The PLC control panel controls the rotation amplitude control mechanism based on data provided by the foil thickness detection structure and / or parameters set on the operating panel, thereby adjusting the rotation amplitude of the small roller. The specific structure and coordination principles of the PLC control panel and operating panel are prior art and will not be further elaborated.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. The rotation amplitude control mechanism is used to control the rotation amplitude of the two small rollers, realize the control of the bending degree during the belt conveyor, and is used to adjust the crack processing intensity. In addition, a foil thickness detection structure is also provided on the upstream side to detect the thickness of the foil to be bent. When the foil head connecting section enters, the bending degree of the belt conveyor path is reduced to avoid the foil head connecting section from breaking due to excessive wrap angle during the belt conveyor.

[0028] 2. The connecting seat is in the form of a gear, which reduces processing costs. The small roller connecting hole on the inner side of the large gear is used to connect the small roller. Moreover, the small roller connecting hole can be in the form of a blind hole. The two ends of the small roller are axially limited between the bottoms of the two small roller connecting holes to prevent them from falling out.

[0029] 3. The connecting shaft is set on the side plate of the frame, and the connecting seat is located on the outside of the side plate, avoiding interference with the foil on the tape.

[0030] 4. The limiting post on the connecting seat slides in the arc-shaped limiting groove of the L-shaped limiting piece. The arc-shaped limiting groove limits the moving path of the limiting post, that is, it limits the maximum rotation angle of the connecting seat and ensures the normal tape running of the foil.

[0031] 5. The thickness sensor is arranged on the upstream side of the upstream foil feeding roller. The change in the bending degree of the foil strip does not affect the cooperation of the U-shaped detection head. Moreover, a second group of thickness sensors can be arranged, that is, on the downstream side of the downstream foil feeding roller, to detect whether the foil head connecting section has been output, thereby providing a basis for the action of the rotation amplitude control mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure provided by the utility model;

[0033] Figure 2 It is a schematic diagram of the main viewing angle provided by the present utility model;

[0034] Figure 3 It is a structural schematic diagram of the connecting seat of Example 1 provided by the utility model.

[0035] In the figure, the frame 1, the side plate 11, the arc-shaped give way groove 12, the foil roller 2, the small roller 3, the rotation amplitude control mechanism 4, the connecting seat 41, the rotation drive structure 42, the connecting shaft 43, the driven tooth 44, the transmission gear 45, the transmission shaft 46, the small roller connecting hole 47, the center hole 48, the limiting column 49, the foil thickness detection structure 6, the thickness sensor 61, the U-shaped detection head 62, the L-shaped limiting plate 7, the arc-shaped limiting groove 71, and the foil 8. DETAILED DESCRIPTION

[0036] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0037] Example 1

[0038] Specific implementation examples Figures 1-3 As shown, the novel foil crack processing device for preventing foil head breakage comprises a frame 1 and two foil-passing rollers 2 rotatably connected to the frame 1, two small rollers 3 are arranged in parallel between the foil-passing rollers 2, and a rotation amplitude control mechanism 4 is provided between the small rollers 3 and the frame 1, which can adjust the angle between the radial line connecting the two small rollers 3 and the radial line connecting the two foil-passing rollers 2. The frame 1 is also provided with a foil thickness detection structure 6 located on the upstream side of the small roller 3.

[0039] Specifically, the foil crack processing device of the present invention is mainly used to process cracks on the surface of the foil to improve its bending performance. The foil is input from the foil-passing roller 2 and output from the other foil-passing roller 2 after passing the small roller 3. The two small rollers 3 are located on both sides of the line connecting the two foil-passing rollers 2, so that the foil is conveyed in a folded line manner when conveyed between them, and crack processing is achieved during the bending process of the conveying, thereby improving the bending resistance of the foil. The rotation amplitude control mechanism 4 is used to control the rotation amplitude of the two small rollers 3, that is, to adjust the spacing between the small roller 3 and the line connecting the two foil-passing rollers 2, so as to realize the control of the bending degree during the conveying. In addition, a foil thickness detection structure 6 is also provided on the upstream side for detecting the thickness of the foil to be bent, especially for detecting whether it is the foil head connection section of the two foil rolls. When the foil head connection section enters, the bending degree of the conveying path is reduced to avoid the foil head connection section from breaking due to excessive wrap angle during conveying.

[0040] In this embodiment, the diameter of the small roller 3 is 10-25 mm, and the material is selected from high-strength materials such as quartz, ceramic, stainless steel or alloy to prevent the small roller 3 from being deformed during the belt running process.

[0041] like Figure 1 、 2 As shown, the rotation amplitude control mechanism 4 includes a connecting base 41 rotatably connected to both sides of the frame 1 via a connecting shaft 43. The ends of the small rollers 3 are rotatably connected to the connecting base 41, and the two small rollers 3 are evenly distributed circumferentially around the connecting shaft 43. The connecting base 41 is connected to a rotation drive structure 42. The rotation drive structure 42 includes a circumferential drive (not specifically shown in the figure). Driven teeth 44 are evenly distributed circumferentially around part or all of the outer circumference of the connecting base 41. The driven teeth 44 mesh with a transmission gear 45. The transmission gear 45 is rotatably connected to the frame 1 via a transmission shaft 46. The transmission shaft 46 passes through the frame 1, and the driving gear of the circumferential drive meshes with the transmission gear 45. The connecting base 41 includes a circular large gear with driven teeth 44 distributed around its outer circumference. The small roller connection hole 47 is provided inside the large gear. The small rollers 3 are rotatably connected to the small roller connection hole 47 via bearings. The connecting shaft 43 passes through the center hole 48 of the large gear.

[0042] Specifically, the small roller 3 is arranged between two parallel and opposite connecting seats 41. The connecting seats 41 can rotate under the drive of the rotation drive structure 42, thereby realizing the up and down control of the small roller 3. Moreover, the two small rollers 3 are respectively located on the rising side and the falling side when the connecting seat 41 rotates, realizing the control of the bending degree of the belt path. The circumferential drive is used to provide the driving force for the rotation of the connecting seat 41. Its output end realizes the transmission of the rotation of the connecting seat 41 through the driving gear and the transmission gear 45. There are two transmission gears 45, which are respectively fixed to the two ends of the transmission shaft 46, that is, the rotation is synchronized, realizing the effect of synchronous drive of the rotation of the two connecting seats 41. The connecting seat 41 can be in the form of a gear to reduce processing costs. The small roller connecting hole 47 on the inner side of the large gear is used to connect the small roller 3. Moreover, the small roller connecting hole 47 can be in the form of a blind hole. The two ends of the small roller 3 are axially limited between the bottoms of the two small roller connecting holes 47 to prevent them from falling out.

[0043] like Figure 1 、 2 As shown, the frame 1 includes two vertically arranged side panels 11, with the side panels 11 passing through both ends of the connecting shaft 43. The connecting seat 41 is located on the outside of the side panels 11 and is rotatably connected to the outer end of the connecting shaft 43 via a bearing. Two arc-shaped clearance grooves 12 are provided on the side panels 11, and the small roller 3 passes through the arc-shaped clearance groove 12. The frame 1 is detachably provided with an L-shaped limit plate 7, which is located on the outside of the side panels 11 and has an arc-shaped limit groove 71 extending through its vertical surface. A limit column 49 is axially provided at a non-center position on the outer end of the connecting seat 41, and the limit column 49 passes through the arc-shaped limit groove 71.

[0044] Specifically, the connecting shaft 43 is provided on the side plate 11 of the frame 1, and the connecting seat 41 is located outside the side plate 11 to avoid interference with the foil running. The arc-shaped clearance groove 12 on the side plate 11 is used for the passage of the small roller 3, ensuring the connection between the small roller 3 and the connecting seat 41. The limiting post 49 on the connecting seat 41 slides within the arc-shaped limiting groove 71 of the L-shaped limiting piece 7. The arc-shaped limiting groove 71 defines the movement path of the limiting post 49, that is, it limits the maximum rotation angle of the connecting seat 41, ensuring the normal running of the foil. Moreover, the horizontal surface of the L-shaped limiting piece 7 is detachably fixed by bolts or other means, facilitating disassembly and replacement.

[0045] like Figure 1 As shown, the foil thickness detection structure 6 includes a group of thickness sensors 61. The thickness sensor 61 is fixed on the frame 1 and is located on the upstream side of the upstream foil roller 2. The thickness sensor 61 includes a U-shaped detection head 62 located in the width direction of the foil, and the side of the foil passes through the U-shaped detection head.

[0046] Specifically, the thickness sensor 61 detects the thickness by a U-shaped detection head 62. The side of the foil is located in the recess of the U-shaped detection head. The thickness sensor 61 is arranged on the upstream side of the upstream foil roller 2. The change in the bending degree of the foil does not affect the cooperation of the U-shaped detection head 62.

[0047] In this embodiment, the small rollers 3 are symmetrically distributed on both sides of the rotation amplitude control mechanism 4, and the foil is sequentially wound around the upstream foil feeding roller 2, the two small rollers 3, and the downstream foil feeding roller 2 in a zigzag pattern. The foil wraps around each roller axis in a zigzag pattern, and its contact surfaces with the two foil feeding rollers 2 are located on opposite sides. When the foil rotates until the line connecting the two small rollers 3 aligns with the line connecting the foil feeding rollers 2, the foil is transmitted between the two foil feeding rollers 2 in an interlaced manner, and the force is evenly distributed.

[0048] In this embodiment, the novel foil crack processing device for preventing foil head breakage further includes a PLC control board and an operation panel. The PLC control board is electrically connected to the operation panel, the foil thickness detection structure 6 and the driver of the rotation amplitude control mechanism 4 respectively.

[0049] Specifically, the PLC control board can control the rotation amplitude control mechanism 4 according to the data provided by the foil thickness detection structure 6 and / or the setting parameters of the operation panel to adjust the rotation amplitude of the small roller 3.

[0050] Furthermore, the thickness sensor 61 is about 0.5m away from the small roller 3, and the adjustment time is Ts=0.5*60 / V, where V (m / min) is the foil running speed. For example, when the running speed V is 1m / min, the adjustment time T is 30s. This control method is in the setting program of the PLC control board. The PLC control board automatically controls the rotation speed of the circumferential drive according to the running speed to ensure that the foil head connecting section can pass smoothly through this device when it reaches the small roller 3.

[0051] Specific working principle: first, the formed foil foil 8 according to the fold line shape from the upstream foil roller 2 from above, through the first small roller 3 below, then through the second small roller 3 above, then from below from the downstream foil roller 2; after the device is started, the PLC control board controls the circumferential driver to work according to the set parameters, and the small roller 3 is rotated to the set angle, and the formed foil is bent. The angle can be controlled between 90°-180° according to the process requirements, and can be adjusted at any time during the production process. When the roll is changed, the thickness of the foil head connection section is obviously thicker than the normal foil, and after the thickness sensor 61 detects the thickness change, it sends a related signal to the PLC control board, and then the PLC control board controls the circumferential driver to quickly adjust the small roller 3 to 180°. After 2T time, that is, 60s, the foil head connection section has completely passed through the device, and at this time the PLC control board controls the circumferential driver to rotate, and the small roller 3 returns to the default position to continue the bending process for the next roll of formed foil. If the bending requirements of the upper and lower rolls are different, the angle setting can also be manually modified on the operation panel.

[0052] Embodiment 2

[0053] The specific working principle of this embodiment is basically the same as that of embodiment 1, and the difference lies in the rotating drive structure 42.

[0054] In the embodiment, the rotating drive structure 42 includes a linear drive cylinder with the cylinder body hinged to the rack 1, and the output end of the linear drive cylinder is hingedly connected to the non-circular center position outside the connecting seat 41, which can drive the connecting seat 41 to rotate.

[0055] Specifically, the rotation of the connecting seat 41 can also be realized by the linear drive cylinder, and the output shaft of the linear drive cylinder is connected to the side of the connecting seat 41, and the connecting shaft 43 is not on the extension line of the output shaft, which ensures the effect of the extension action of the output shaft driving the connecting seat 41 to rotate.

[0056] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A novel foil crack processing device for preventing foil head breakage, comprising a frame (1) and two foil-passing rollers (2) rotatably connected to the frame (1) and parallel to each other, characterized in that: Two small rollers (3) are arranged in parallel between the foil-passing rollers (2); a rotation amplitude control mechanism (4) is provided between the small rollers (3) and the frame (1), which can adjust the angle between the radial connection line of the two small rollers (3) and the radial connection line of the two foil-passing rollers (2); and a foil thickness detection structure (6) located on the upstream side of the small rollers (3) is also provided on the frame (1).

2. The novel foil crack processing device for preventing foil head breakage according to claim 1 is characterized in that: The rotation amplitude control mechanism (4) includes a connecting seat (41) rotatably connected to both sides of the frame (1) via a connecting shaft (43), the ends of the small rollers (3) are rotatably connected to the connecting seat (41), and the two small rollers (3) are evenly distributed circumferentially with the connecting shaft (43) as the center, and the connecting seat (41) is connected to the rotation drive structure (42).

3. The novel foil crack processing device for preventing foil head breakage according to claim 2 is characterized in that: The rotation drive structure (42) includes a circumferential drive, and driven teeth (44) are evenly distributed circumferentially on part or all of the outer circumference of the connecting seat (41). The driven teeth (44) are meshed and connected with the transmission gear (45). The transmission gear (45) is rotationally connected to the frame (1) through a transmission shaft (46). The transmission shaft (46) is passed through the frame (1), and the driving gear of the circumferential drive is meshed and connected with the transmission gear (45).

4. The novel foil crack processing device for preventing foil head breakage according to claim 3 is characterized in that: The connecting seat (41) includes a circular large gear, the driven teeth (44) are distributed on the outer circumference of the large gear, a small roller connecting hole (47) is provided on the inner side of the large gear, the small roller (3) is rotatably connected to the small roller connecting hole (47) through a bearing, and the connecting shaft (43) passes through the center hole (48) of the large gear.

5. The novel foil crack processing device for preventing foil head breakage according to claim 2 is characterized in that: The rotation drive structure (42) includes a linear drive cylinder whose cylinder body is hinged to the frame (1), and the output end of the linear drive cylinder is hingedly connected to a non-center position outside the connecting seat (41), and can drive the connecting seat (41) to rotate.

6. The novel foil crack processing device for preventing foil head breakage according to claim 2 is characterized in that: The frame (1) includes two vertically arranged side panels (11), the side panels (11) are passed through at both ends of the connecting shaft (43), the connecting seat (41) is located on the outside of the side panels (11), and is rotatably connected to the outer end of the connecting shaft (43) through a bearing, the side panels (11) are provided with two arc-shaped clearance grooves (12), and the small roller (3) is passed through the arc-shaped clearance groove (12).

7. The novel foil crack processing device for preventing foil head breakage according to claim 6 is characterized in that: The frame (1) is detachably provided with an L-shaped limiting piece (7), and an arc-shaped limiting groove (71) is provided through the vertical surface of the limiting piece. A limiting column (49) is axially provided at a non-center position of the outer end of the connecting seat (41), and the limiting column (49) is provided with the arc-shaped limiting groove (71).

8. The novel foil crack processing device for preventing foil head breakage according to claim 1 is characterized in that: The foil thickness detection structure (6) includes at least one set of thickness sensors (61), the thickness sensors (61) are fixed on the frame (1) and are located at least on the upstream side of the upstream foil roller (2), the thickness sensors (61) include a U-shaped detection head (62) located in the width direction of the foil, and the side of the foil passes through the U-shaped detection head (62).

9. The novel foil crack processing device for preventing foil head breakage according to any one of claims 1 to 8, characterized in that: The small rollers (3) are symmetrically distributed on both sides of the rotation amplitude control mechanism (4), and the foil is sequentially wound around the upstream foil-passing roller (2), the two small rollers (3), and the downstream foil-passing roller (2) in a zigzag manner.

10. The novel foil crack processing device for preventing foil head breakage according to any one of claims 1 to 8, characterized in that: It also includes a PLC control board and an operation panel, wherein the PLC control board is electrically connected to the operation panel, the foil thickness detection structure (6) and the driver of the rotation amplitude control mechanism (4).

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