A cold-rolled stainless steel strip surface defect detection device

Abstract

The present application relates to the technical field of steel strip defect detection, and particularly relates to a cold-rolled stainless steel strip surface defect detection device, which comprises a detection workbench, two groups of deviation prevention assemblies are slidably installed on the detection workbench; a width adjusting assembly is installed on one side of each group of the deviation prevention assemblies; a width adjusting driving assembly is installed on the detection workbench; a steel strip winding assembly is installed on the detection workbench; a steel strip clamping assembly is installed in the steel strip winding assembly; a clamping interval adjusting assembly is installed in the steel strip winding assembly; a clamping driving assembly is installed in the steel strip winding assembly; and a defect detector is fixedly installed in the middle of the detection workbench. The present application can detect the steel strip without completely disassembling the steel roll, thereby reducing the operation and maintenance costs of various devices and improving the detection work efficiency. In addition, the interval between the clamping plate and the deviation prevention wheel can be adjusted, and the present application can be applied to steel strips with various widths, thereby reducing the detection cost.

Description

Technical Field

[0001] This invention relates to the field of steel strip defect detection technology, and specifically to a device for detecting surface defects in cold-rolled stainless steel strip. Background Technology

[0002] Cold-rolled stainless steel strip is made from hot-rolled stainless steel strip as raw material through further cold rolling. Compared with hot-rolled strip, it has higher dimensional accuracy, lower surface roughness, better surface quality, smoother finish, and higher strength. It is suitable for industries such as electrical appliances, stainless steel kitchenware, hardware products, floor springs, bathroom fixtures, chemicals, petroleum, pipe manufacturing, cable wrapping, medical applications, bending and flanging, machinery manufacturing, and building decoration. Hardened cold-rolled strip is suitable for industries such as electronics, electrical appliances, computers, high-tech product components, adjusting shims, hardware stamping parts, and spring sheets. Thinner cold-rolled strip can replace thicker hot-rolled strip for the same purpose, saving steel consumption and having significant economic benefits.

[0003] Currently, surface defect detection of cold-rolled strip steel is developed based on machine vision, image processing technology, and high-speed parallel processing units. It makes full use of image acquisition equipment and image processing algorithms, mainly including image acquisition and image data processing. However, cold-rolled stainless steel strip is usually packaged in coils during production. When performing surface defect detection on coiled cold-rolled stainless steel strip, large equipment is required to completely unpack the steel coil, and then rewind it after inspection. This not only increases the operating and maintenance costs of various equipment, but also hinders the improvement of inspection efficiency. In addition, in the actual production process, due to the different widths of cold-rolled strip steel, the surface defect detection equipment needs to be adapted to the width of the steel strip to be inspected. However, most existing detection devices can only detect steel strips of the same width. When the steel strip width is different, different detection devices need to be changed. Therefore, multiple detection machines are required, which increases the inspection cost.

[0004] Therefore, the present invention provides a surface defect detection device for cold-rolled stainless steel strip to solve the above problems. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a surface defect detection device for cold-rolled stainless steel strip to solve the above problems.

[0006] A surface defect detection device for cold-rolled stainless steel strip includes a detection worktable, on which two sets of anti-deviation components are slidably mounted; a width adjustment component is installed on one side of each set of anti-deviation components; a width adjustment drive component is installed on the detection worktable; a steel strip winding component is installed on the detection worktable; a steel strip clamping component is installed inside the steel strip winding component; a clamping gap adjustment component is installed inside the steel strip winding component; a clamping drive component is installed inside the steel strip winding component; and a defect detector is fixedly mounted in the middle of the detection worktable.

[0007] Preferably, each set of anti-deviation components includes an anti-deviation groove opened on the testing workbench; two anti-deviation bases are slidably and symmetrically installed in the anti-deviation groove; and two anti-deviation wheels are symmetrically and rotatably installed in each anti-deviation base.

[0008] Preferably, each set of the width adjustment components includes two L-shaped brackets fixedly installed on the front and rear sides of the detection workbench, and the L-shaped brackets are installed upside down; an arc-shaped rack is slidably installed on the inner top of each L-shaped bracket via a guide rail; an arc-shaped plate is fixedly installed on the inner side of each arc-shaped rack, and the side of the arc-shaped plate near the anti-deviation base contacts the anti-deviation base; two limiting springs are horizontally and fixedly installed on the top side of each anti-deviation base, and the other end of the limiting spring is fixedly connected to the corresponding L-shaped bracket.

[0009] Preferably, the width adjustment drive assembly includes a width adjustment groove formed on the inner sidewall of the L-shaped bracket; width adjustment drive racks are slidably installed in the width adjustment grooves of the two L-shaped brackets on the same side; and the width adjustment drive racks mesh with the two arc-shaped racks on the same side; a connecting rod is fixedly installed at the bottom left end of the two width adjustment drive racks; an electric push rod is fixedly installed on the upper surface of the detection workbench and on the left side of the connecting rod; and the telescopic end of the electric push rod is fixedly connected to the connecting rod.

[0010] Preferably, the steel strip winding assembly includes a steel strip winding motor fixedly installed at the right end of the upper surface of the inspection workbench; a steel strip winding drive shaft installed at the output end of the steel strip winding motor; and a steel strip winding roller fixedly installed at the other end of the steel strip winding drive shaft.

[0011] Preferably, the strip clamping assembly includes a strip clamping groove formed in the middle of the strip take-up roller; a pair of fixed clamping plates installed in the middle of the strip clamping groove; a cavity formed inside the strip take-up roller; a fixed clamping gear rotatably installed in the middle of the inner wall of the cavity; fixed clamping racks meshing on both sides of the fixed clamping gear; a notch formed on the side wall of the strip take-up roller at a position corresponding to the fixed clamping rack; a connecting block installed on the fixed clamping rack near the fixed clamping plate, and the connecting block passing through the notch; the two fixed clamping plates are respectively connected to their corresponding fixed clamping racks through the connecting block; and a pair of movable clamping plates are installed in the strip clamping groove on both sides of the fixed clamping plate.

[0012] Preferably, the clamping gap adjustment assembly includes a support plate fixedly mounted on the inner wall of the cavity; a dual-axis drive motor fixedly mounted on the support plate; gap adjustment screws mounted on both sides of the dual-axis drive motor, with opposite rotation directions; gap adjustment blocks symmetrically and threadedly mounted on the two gap adjustment screws; two rack grooves symmetrically mounted on each gap adjustment block near the fixed clamping gear; a movable clamping rack slidably mounted in each rack groove; and a rack on each gap adjustment block near the fixed clamping gear. A movable clamping gear is rotatably mounted on one side of the wheel, and the movable clamping gear is located between two movable clamping racks; the two movable clamping racks mesh with the movable clamping gear; a spacing adjustment groove is provided on the side wall of the steel strip take-up roller at a position corresponding to the movable clamping rack; a spacing adjustment slider is installed on the movable clamping rack near the movable clamping plate, and the spacing adjustment slider is disposed through the spacing adjustment groove; the two movable clamping plates are respectively connected to their corresponding movable clamping racks through the spacing adjustment slider.

[0013] Preferably, the clamping drive assembly includes a cross-shaped drive shaft that is installed through one side wall of the steel strip take-up roller; a fixed worm gear is fixedly installed in the middle of the cross-shaped drive shaft, and the fixed worm gear meshes with the fixed clamping gear; movable worm gears are symmetrically slidably installed on the cross-shaped drive shaft and on both sides of the fixed worm gear; limit plates are fixedly installed at both ends of the bottom of each of the spacing adjustment blocks; each movable worm gear is located between its two corresponding limit plates, and each movable worm gear meshes with its corresponding movable clamping gear; and a drive knob is fixedly connected to one end of the cross-shaped drive shaft.

[0014] The beneficial effects of this invention are as follows: This invention employs an anti-deviation component, with two anti-deviation wheels simultaneously correcting the steel strip's deviation during defect detection, preventing it from affecting the test results. A steel strip clamping component allows for clamping one end of the steel strip initially, while the untested portion is released, and the winding roller simultaneously winds up the tested portion, eliminating the need to completely unwind the coil. This reduces operating and maintenance costs and improves detection efficiency. Furthermore, the invention utilizes a width adjustment component and a clamping distance adjustment component to adjust the distance between the clamping plate and the anti-deviation wheels, making it suitable for steel strips of various widths. This eliminates the need to change detection devices when the steel strip width differs, further reducing detection costs. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is the front view of the present invention; Figure 3 For the present invention Figure 2 Right view section in the middle AA direction; Figure 4 For the present invention Figure 2 Top view of the cross section along the middle BB direction; Figure 5 For the present invention Figure 2 Left-side cross-sectional view in the middle CC direction; Figure 6 This is a top view of the present invention; Figure 7 For the present invention Figure 6 A three-dimensional cross-sectional view along the DD direction; Figure 8 This is a cross-sectional view of the cross-shaped drive shaft in this invention; Figure 9 For the present invention Figure 7 Enlarged view of point A in the middle; Figure 10 For the present invention Figure 3 Enlarged view of point B in the middle; Figure 11 For the present invention Figure 7 Enlarged view of point C in the middle; Figure 12 For the present invention Figure 5 Enlarged view of point D in the middle.

[0016] In the picture: 1. Inspection workbench; 2. Anti-deviation assembly; 3. Width adjustment assembly; 4. Width adjustment drive assembly; 5. Steel strip winding assembly; 6. Steel strip clamping assembly; 7. Clamping gap adjustment assembly; 8. Clamping drive assembly; 9. Defect detector; 10. Anti-deviation slide groove; 11. Anti-deviation base; 12. Anti-deviation wheel; 13. L-shaped bracket; 14. Arc-shaped rack; 15. Arc-shaped plate; 16. Limiting spring; 17. Width adjustment slide groove; 18. Width adjustment drive rack; 19. Connecting rod; 20. Electric push rod; 21. Steel strip winding motor; 22. Steel strip winding 23. Drive shaft; 24. Steel strip take-up roller; 25. Steel strip clamping groove; 26. Fixed clamping plate; 27. Cavity; 28. Fixed clamping gear; 29. ​​Fixed clamping rack; 30. Notch; 31. Cross-shaped drive shaft; 32. Movable clamping plate; 33. Support plate; 34. Dual-axis drive motor; 35. Spacing adjustment screw; 36. Spacing adjustment block; 37. Rack slide; 38. Movable clamping rack; 39. Movable clamping gear; 40. Spacing adjustment slide; 41. Fixed worm gear; 42. Movable worm gear; 43. Limiting plate; 44. Drive knob. Detailed Implementation

[0017] The following will refer to the attached reference. Figures 1 to 12 The various embodiments of the present invention will be described in detail below. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0018] A surface defect detection device for cold-rolled stainless steel strip, as shown in the attached document. Figure 1 To be continued Figure 12 As shown, the system includes an inspection workbench 1, on which two sets of anti-deviation components 2 are slidably mounted; a width adjustment component 3 is mounted on one side of each set of anti-deviation components 2; a width adjustment drive component 4 is mounted on the inspection workbench 1; a steel strip winding component 5 is mounted on the inspection workbench 1; a steel strip clamping component 6 is mounted inside the steel strip winding component 5; a clamping gap adjustment component 7 is mounted inside the steel strip winding component 5; a clamping drive component 8 is mounted inside the steel strip winding component 5; and a defect detector 9 is fixedly mounted in the middle of the inspection workbench 1.

[0019] In practical use, cold-rolled stainless steel strip is usually packaged in coils during production. When inspecting its surface for defects, firstly, adjust the distance between the anti-deviation component 2 and the steel strip clamping component 6 according to the width of the steel strip to match the width of the steel strip to be inspected. Then, turn on the defect detector 9, pass one end of the coiled steel strip through the two sets of anti-deviation components 2 and place its end in the steel strip clamping component 6. Then, adjust the clamping drive component 8 to make the steel strip clamping component 6 clamp the end of the steel strip. Then, the steel strip winding component 5 promptly winds up the inspected part to prevent equipment failure caused by steel strip stacking.

[0020] As attached Figure 6 Appendix Figure 7 Appendix Figure 9 As shown, each set of anti-deviation components 2 includes an anti-deviation groove 10 opened on the detection workbench 1; two anti-deviation bases 11 are slidably and symmetrically installed in the anti-deviation groove 10; and two anti-deviation wheels 12 are symmetrically and rotatably installed in each anti-deviation base 11.

[0021] As attached Figure 6 Appendix Figure 7 Appendix Figure 9 As shown, each set of width adjustment components 3 includes two L-shaped brackets 13 fixedly installed on the front and rear sides of the detection workbench 1, and the L-shaped brackets 13 are installed upside down; an arc-shaped rack 14 is slidably installed on the inner top of each L-shaped bracket 13 via a guide rail; an arc-shaped plate 15 is fixedly installed on the inner side of each arc-shaped rack 14, and the side of the arc-shaped plate 15 near the anti-deviation base 11 contacts the anti-deviation base 11; two limiting springs 16 are horizontally and fixedly installed on the top side of each anti-deviation base 11, and the other end of the limiting spring 16 is fixedly connected to the corresponding L-shaped bracket 13.

[0022] As attached Figure 6 Appendix Figure 7 Appendix Figure 9 As shown, the width adjustment drive assembly 4 includes a width adjustment groove 17 opened on the inner side wall of the L-shaped bracket 13; width adjustment drive racks 18 are slidably installed in the width adjustment grooves 17 of the two L-shaped brackets 13 on the same side; and the width adjustment drive racks 18 mesh with two arc-shaped racks 14 on the same side; a connecting rod 19 is fixedly installed at the bottom left end of the two width adjustment drive racks 18; an electric push rod 20 is fixedly installed on the upper end surface of the detection workbench 1 and on the left side of the connecting rod 19; the telescopic end of the electric push rod 20 is fixedly connected to the connecting rod 19.

[0023] In practical use, first adjust the two sets of anti-deviation components 2 to a suitable width according to the width of the steel strip; turn on the electric push rod 20, the electric push rod 20 drives the connecting rod 19 to move, and the connecting rod 19 further drives the two width adjustment drive racks 18 to slide in the width adjustment slide groove 17, thereby driving the arc rack 14 and arc plate 15 to rotate (the two arc racks 14 and arc plates 15 in the same group are centrally symmetrically arranged). Under the tension of the limit spring 16, when the arc rack 14 and arc plate 15 rotate, the two anti-deviation bases 11 in the same group will slide in the anti-deviation slide groove 10, thereby realizing the adjustment of the distance between the two pairs of anti-deviation wheels in the same group.

[0024] As attached Figure 1 As shown, the steel strip winding assembly 5 includes a steel strip winding motor 21 fixedly installed at the right end of the upper surface of the inspection workbench 1; a steel strip winding drive shaft 22 is installed at the output end of the steel strip winding motor 21; and a steel strip winding roller 23 is fixedly installed at the other end of the steel strip winding drive shaft 22.

[0025] As attached Figure 1 Appendix Figure 2 Appendix Figure 5 To be continued Figure 7 Appendix Figure 9 Appendix Figure 11 Appendix Figure 12 As shown, the strip clamping assembly 6 includes a strip clamping groove 24 formed in the middle of the strip take-up roller 23; a pair of fixed clamping plates 25 are installed in the middle of the strip clamping groove 24; a cavity 26 is formed inside the strip take-up roller 23; a fixed clamping gear 27 is rotatably installed in the middle of the inner wall of the cavity 26; fixed clamping racks 28 are meshed on both sides of the fixed clamping gear 27; a notch 29 is formed on the side wall of the strip take-up roller 23 at a position corresponding to the fixed clamping rack 28; a connecting block is installed on the side of the fixed clamping rack 28 near the fixed clamping plate 25, and the connecting block passes through the notch 29; the two fixed clamping plates 25 are connected to their corresponding fixed clamping racks 28 respectively through the connecting block; a pair of movable clamping plates 31 are installed in the strip clamping groove 24 and on both sides of the fixed clamping plate 25.

[0026] As attached Figure 3 Appendix Figure 4 Appendix Figure 6 Appendix Figure 7 Appendix Figure 10 To be continued Figure 12As shown, the clamping gap adjustment assembly 7 includes a support plate 32 fixedly installed on the inner wall of the cavity 26; a dual-axis drive motor 33 fixedly installed on the support plate 32; gap adjustment screws 34 are installed on both sides of the dual-axis drive motor 33, and the two gap adjustment screws 34 have opposite rotation directions; gap adjustment blocks 35 are symmetrically and threadedly installed on the two gap adjustment screws 34; two rack grooves 36 are symmetrically installed on each gap adjustment block 35 near the fixed clamping gear 27; a movable clamping rack 37 is slidably installed in each rack groove 36; and a movable clamping rack 37 is slidably installed on each gap adjustment block 35 near the fixed clamping gear 27. A movable clamping gear 38 is rotatably mounted on one side of gear 27, and the movable clamping gear 38 is located between two movable clamping racks 37; the two movable clamping racks 37 mesh with the movable clamping gear 38; a spacing adjustment groove 39 is provided on the side wall of the steel strip take-up roller 23 at a position corresponding to the movable clamping rack 37; a spacing adjustment slider is installed on the movable clamping rack 37 near the movable clamping plate 31, and the spacing adjustment slider passes through the spacing adjustment groove 39; the two movable clamping plates 31 are respectively connected to their corresponding movable clamping racks 37 through the spacing adjustment slider.

[0027] As attached Figure 1 Appendix Figure 2 Appendix Figure 5 Appendix Figure 8 Appendix Figure 10 Appendix Figure 11 As shown, the clamping drive assembly 8 includes a cross-shaped drive shaft 30 that is installed through one side wall of the steel strip take-up roller 23; a fixed worm gear 40 is fixedly installed in the middle of the cross-shaped drive shaft 30, and the fixed worm gear 40 meshes with the fixed clamping gear 27; movable worm gears 41 are symmetrically slidably installed on the cross-shaped drive shaft 30 and on both sides of the fixed worm gear 40; limit plates 42 are fixedly installed at both ends of the bottom of each spacing adjustment block 35; each movable worm gear 41 is located between its two corresponding limit plates 42, and each movable worm gear 41 meshes with its corresponding movable clamping gear 38; a drive knob 43 is fixedly connected to one end of the cross-shaped drive shaft 30.

[0028] In practical use, first adjust the distance between the two sets of movable clamping plates 31 to match the width of the steel strip; turn on the dual-axis drive motor 33, which drives the spacing adjustment screws 34 on both sides to rotate, thereby further driving the spacing adjustment blocks 35 on the two spacing adjustment screws 34 to move relative to or towards each other, so as to adjust the distance between the two sets of movable clamping plates 31 to match steel strips of different widths.

[0029] After adjustment, turn on the defect detector 9, pass one end of the coiled steel strip through the anti-deviation wheels 12, and place its end in the steel strip clamping assembly 6, between a pair of fixed clamping plates 25 and two pairs of movable clamping plates 31. Then manually turn the drive knob 43. Since the bottom ends of each spacing adjustment block 35 are fixedly installed with limit plates 42, and the moving worm 41 is located between its corresponding two limit plates 42, when the two spacing adjustment blocks 35 move, they will drive the two moving worms 41 to move synchronously on the cross-shaped drive shaft 30. That is, the moving worm 41 and its corresponding movable clamping gear move synchronously. 38 is always engaged; the drive knob 43 will drive the cross-shaped drive shaft 30 to rotate, which in turn drives the two movable worm gears 41 and one fixed worm gear 40 to rotate, thereby driving the two movable clamping gears 38 and one fixed clamping gear 27 to rotate clockwise, which in turn drives a pair of fixed clamping plates 25 and two pairs of movable clamping plates 31 to move relative to each other, so as to clamp the end of the steel strip; after clamping, the steel strip winding motor 21 is turned on, and the steel strip winding roller 23 is used to wind up the inspected steel strip in time, so as to avoid the inspection equipment from not operating normally due to the accumulation of steel strip, thereby increasing maintenance costs.

[0030] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A surface defect detection device for cold-rolled stainless steel strip, comprising a detection workbench (1), characterized in that, Two sets of anti-deviation components (2) are slidably installed on the inspection workbench (1); a width adjustment component (3) is installed on one side of each set of anti-deviation components (2); a width adjustment drive component (4) is installed on the inspection workbench (1); a steel strip winding component (5) is installed on the inspection workbench (1); a steel strip clamping component (6) is installed inside the steel strip winding component (5); a clamping spacing adjustment component (7) is installed inside the steel strip winding component (5); a clamping drive component (8) is installed inside the steel strip winding component (5); a defect detector (9) is fixedly installed in the middle of the inspection workbench (1). Each anti-deviation assembly (2) includes an anti-deviation groove (10) opened on the testing workbench (1); two anti-deviation bases (11) are slidably and symmetrically installed in the anti-deviation groove (10); and two anti-deviation wheels (12) are symmetrically and rotatably installed in each anti-deviation base (11). Each set of width adjustment components (3) includes two L-shaped brackets (13) fixedly installed on the front and rear sides of the detection workbench (1), and the L-shaped brackets (13) are installed upside down; an arc-shaped rack (14) is slidably installed on the inner top of each L-shaped bracket (13) via a guide rail; an arc plate (15) is fixedly installed on the inner side of each arc-shaped rack (14), and the side of the arc plate (15) close to the anti-deviation base (11) is in contact with the anti-deviation base (11); two limiting springs (16) are horizontally and fixedly installed on the top side of each anti-deviation base (11), and the other end of the limiting spring (16) is fixedly connected to the corresponding L-shaped bracket (13); The width adjustment drive assembly (4) includes a width adjustment groove (17) opened on the inner side wall of the L-shaped bracket (13); width adjustment drive racks (18) are slidably installed in the width adjustment grooves (17) of the two L-shaped brackets (13) on the same side; and the width adjustment drive racks (18) mesh with the two arc-shaped racks (14) on the same side; a connecting rod (19) is fixedly installed at the bottom left end of the two width adjustment drive racks (18); an electric push rod (20) is fixedly installed on the upper surface of the detection workbench (1) and on the left side of the connecting rod (19); the telescopic end of the electric push rod (20) is fixedly connected to the connecting rod (19).

2. The surface defect detection device for cold-rolled stainless steel strip according to claim 1, characterized in that, The steel strip winding assembly (5) includes a steel strip winding motor (21) fixedly installed on the right end of the upper surface of the inspection workbench (1); a steel strip winding drive shaft (22) is installed at the output end of the steel strip winding motor (21); and a steel strip winding roller (23) is fixedly installed at the other end of the steel strip winding drive shaft (22).

3. The surface defect detection device for cold-rolled stainless steel strip according to claim 2, characterized in that, The strip clamping assembly (6) includes a strip clamping groove (24) formed in the middle of the strip take-up roller (23); a pair of fixed clamping plates (25) are installed in the middle of the strip clamping groove (24); a cavity (26) is formed inside the strip take-up roller (23); a fixed clamping gear (27) is rotatably installed in the middle of the inner wall of the cavity (26); fixed clamping racks (28) are meshed on both sides of the fixed clamping gear (27); and the strip take-up roller (23) includes a steel strip clamping groove (24) formed in the middle of the strip take-up roller (23). A notch (29) is provided on the side wall at the position corresponding to the fixed clamping rack (28); a connecting block is installed on the side of the fixed clamping rack (28) near the fixed clamping plate (25), and the connecting block is disposed through the notch (29); the two fixed clamping plates (25) are connected to their corresponding fixed clamping racks (28) respectively through the connecting block; a pair of movable clamping plates (31) are installed in the steel strip clamping groove (24) and on both sides of the fixed clamping plate (25).

4. The surface defect detection device for cold-rolled stainless steel strip according to claim 3, characterized in that, The clamping gap adjustment assembly (7) includes a support plate (32) fixedly installed on the inner wall of the cavity (26); a dual-axis drive motor (33) is fixedly installed on the support plate (32); gap adjustment screws (34) are installed on both sides of the dual-axis drive motor (33), and the two gap adjustment screws (34) have opposite rotation directions; gap adjustment blocks (35) are symmetrically and threadedly installed on the two gap adjustment screws (34); two rack grooves (36) are symmetrically installed on each gap adjustment block (35) near the fixed clamping gear (27); a movable clamping rack (37) is slidably installed in each rack groove (36); and a movable clamping rack (37) is slidably installed on each gap adjustment block (35) near the fixed clamping gear (27). A movable clamping gear (38) is rotatably mounted on one side of the gear (27), and the movable clamping gear (38) is located between the two movable clamping racks (37); the two movable clamping racks (37) mesh with the movable clamping gear (38); a spacing adjustment groove (39) is provided on the side wall of the steel strip take-up roller (23) at a position corresponding to the movable clamping rack (37); a spacing adjustment slider is installed on the movable clamping rack (37) near the movable clamping plate (31), and the spacing adjustment slider is disposed through the spacing adjustment groove (39); the two movable clamping plates (31) are respectively connected to their corresponding movable clamping racks (37) through the spacing adjustment slider.

5. The surface defect detection device for cold-rolled stainless steel strip according to claim 4, characterized in that, The clamping drive assembly (8) includes a cross-shaped drive shaft (30) that is installed through one side wall of the steel strip take-up roller (23); a fixed worm (40) is fixedly installed in the middle of the cross-shaped drive shaft (30), and the fixed worm (40) meshes with the fixed clamping gear (27); movable worms (41) are symmetrically slidably installed on the cross-shaped drive shaft (30) and on both sides of the fixed worm (40); limit plates (42) are fixedly installed at both ends of the bottom of each of the spacing adjustment blocks (35); each movable worm (41) is located between its two corresponding limit plates (42), and each movable worm (41) meshes with its corresponding movable clamping gear (38); a drive knob (43) is fixedly connected to one end of the cross-shaped drive shaft (30).

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