An edge-opening and rewinding device for a wire saw with a nickel and diamond composite layer electroplated on the surface of carbon steel

Abstract

The present invention discloses a reeling device for edge opening of a wire saw with a nickel plating and diamond composite layer on the surface of carbon steel, which comprises a frame. A unwinding mechanism and a winding mechanism are arranged on the front side of the frame. A lead-out wheel and a lead-in wheel are respectively arranged above the unwinding mechanism and the winding mechanism. An edge opening mechanism is arranged on the side of the frame, and a tensioning mechanism is arranged at a position between the unwinding mechanism and the edge opening mechanism; the edge opening mechanism comprises a mounting plate, and two multi-groove guide wheels I and multi-groove guide wheels II are rotatably arranged on the front side of the mounting plate. The present invention can reduce the resistance borne by the wire saw with a nickel plating and diamond composite layer on the surface of carbon steel during the edge opening process, and eliminate the phenomenon of wire breakage during the edge opening process.

Description

Technical Field

[0001] The present invention relates to the technical field of manufacturing wire saws with a nickel and diamond composite layer electroplated on the surface of carbon steel, and more specifically, to an edge-opening and rewinding device for a wire saw with a nickel and diamond composite layer electroplated on the surface of carbon steel. Background Art

[0002] A wire saw made by electroplating a nickel and diamond composite layer on the surface of carbon steel (hereinafter referred to as wire saw) has replaced the original free abrasives as the main technology for cutting silicon wafers and other high-hard and brittle materials at present due to its advantages such as high cutting efficiency and less loss in cutting high-hard and brittle materials such as silicon wafers. The wire saw made by electroplating needs to be edge-opened before use: the outer nickel layer of the diamond on the surface of the wire saw is removed by rubbing the advancing wire saw against a grindstone to expose the cutting edge. Existing wire saw edge-opening devices usually use a pair of multi-groove guide wheels and the same edge-opening stone to edge-open both sides of the wire saw, which results in the same contact resistance between the wire saw and the edge-opening stone for the first time and the subsequent contact, and the superposition of the two resistances easily causes the wire saw to break due to excessive resistance, and it also easily causes uneven wear of the surfaces of the grooves of the multi-groove guide wheels, resulting in the wire saw breaking. Research shows that the wire breakage rate during the edge-opening process of the wire saw is as high as 20%, of which the wire breakage rate caused by the unreasonable structure of the edge-opening device accounts for about 2%. Due to wire breakage, the wire saw fails to reach the specified length (usually ≥40 km) and becomes a waste product, resulting in a large quality loss. At the same time, the dust generated during the edge-opening process has a certain impact on the environment and has not been effectively treated. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide an edge-opening and rewinding device for a wire saw with a nickel and diamond composite layer electroplated on the surface of carbon steel.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] The present invention discloses a reeling device for edge opening of a wire saw with a composite layer of electroplated nickel and diamond on the surface of carbon steel, which includes a frame. A pay-off mechanism and a take-up mechanism are arranged on the front side of the frame. A lead-out wheel and a lead-in wheel are respectively arranged above the pay-off mechanism and the take-up mechanism. An edge-opening mechanism is arranged on the side of the frame, and a tensioning mechanism is arranged at the position between the pay-off mechanism and the edge-opening mechanism; the edge-opening mechanism includes a mounting plate. Two multi-groove guide wheels I and multi-groove guide wheels II are rotatably arranged on the front side of the mounting plate. The multi-groove guide wheels I and multi-groove guide wheels II are arranged corresponding to each other up and down. A servo motor I and a servo motor II are arranged on the rear side of the mounting plate. The servo motor I is drivingly connected to one of the multi-groove guide wheels I, and the servo motor II is drivingly connected to one of the multi-groove guide wheels II. A pass-wheel mechanism is arranged at the position on the mounting plate on the side of the multi-groove guide wheels I and multi-groove guide wheels II. Two lifting blocks are arranged on the mounting plate, and an edge-opening stone is installed on the lifting block. One of the edge-opening stones is located at the upper position between the two multi-groove guide wheels I, and the other edge-opening stone is located at the position between the two multi-groove guide wheels II; a dust suction mechanism I and a dust suction mechanism II are installed on the front side of the mounting plate.

[0006] Further, a linear driving mechanism is arranged on the rear side of the mounting plate, and the lifting block is driven and installed on the linear driving mechanism. An activity hole is opened on the mounting plate, and the lifting block passes through the activity hole.

[0007] Further, a stop block is connected to the front side of the lifting block, a cylinder is installed on the front side of the lifting block, the cylinder is drivingly connected to a clamping block, the stop block and the clamping block are arranged opposite to each other. An installation block is also included. A plurality of limit grooves are opened on both the left and right sides of the installation block. A limit block is slidably arranged in the limit groove. The lower part of the limit block is connected with a movable block. A plurality of edge-opening stones are provided, and the edge-opening stones are installed between two opposite movable blocks. A limit post is installed in the limit groove on the right side, a blind hole II is opened in the movable block on the right side, and the lower end of the limit post is inserted into the blind hole II. The upper part of the limit block in the limit groove on the left side is connected with a positioning post. A threaded hole is opened at the position above the limit groove on the left side in the installation block. The lower end of the threaded hole communicates with the upper end of the limit groove on the left side. An adjusting screw is threadedly connected in the threaded hole. A blind hole I is opened at the lower end of the adjusting screw. The upper end of the positioning post extends into the blind hole I. A pressing plate is slidably arranged in the limit groove on the left side. The positioning post passes through the pressing plate. A spring is sleeved on the positioning post. The upper end of the spring is connected to the lower part of the pressing plate, and the lower end of the spring is connected to the upper end of the limit block.

[0008] Further, an oval hole is opened on the movable block, a fixed block is arranged on the inner side of the movable block, a fixed screw is connected to the outer side of the fixed block, the fixed screw passes through the oval hole on the movable block, and the part of the fixed screw passing through the movable block is threadedly connected with a fixed nut.

[0009] Further, the pass-wheel mechanism includes a mounting arm, a swing arm is hinged on the mounting arm, a single-groove wheel is rotatably arranged on the swing arm, an arc-shaped hole is opened on the mounting arm, and a plurality of fixing holes are opened on the swing arm corresponding to the arc-shaped hole.

[0010] Further, the tensioning mechanism includes a base plate, on which two length measuring wheels are arranged. The positions of the two length measuring wheels respectively correspond to the outgoing wheel and the incoming wheel. A swing rod is hinged at a position on the base plate to the right of the length measuring wheels. A tensioning guide wheel is rotatably arranged on the swing rod. Elastic bumpers are arranged at positions on the base plate on the left and right sides of the swing rod respectively.

[0011] Further, a lead screw displacement mechanism is arranged above each of the unwinding mechanism and the winding mechanism. The outgoing wheel is installed on the lead screw displacement mechanism above the unwinding mechanism, and the incoming wheel is installed on the lead screw displacement mechanism above the winding mechanism.

[0012] The beneficial effects of the present invention are as follows: It can simultaneously edge the upper and lower sides of the wire saw. The edging process is stable, the buffer device reduces the excessive tension of the wire saw, and the multi-groove guide wheel has light wear. It can collect and organize the discharge of the debris generated during the edging process, avoid the debris from adhering to the electroplated diamond wire saw, and eliminate the phenomenon of wire breakage during the edging process. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the edge-opening and rewinding device for the wire saw with a nickel and diamond composite layer electroplated on the surface of carbon steel in this embodiment;

[0014] Figure 2 It is a front view of the edge-opening mechanism in this embodiment;

[0015] Figure 3 It is a rear view of the edge-opening mechanism in this embodiment;

[0016] Figure 4 It is a schematic structural diagram of the lifting block in this embodiment;

[0017] Figure 5 It is a schematic installation diagram of the edge-opening stone in this embodiment;

[0018] Figure 6 It is Figure 5 an enlarged schematic diagram of part A in

[0019] Figure 7 It is a side view of the clamping block in this embodiment.

[0020] Reference numerals: 1, frame; 2, partition; 3, unwinding mechanism; 4, winding mechanism; 5, screw displacement mechanism; 6, guiding wheel; 7, guiding-in wheel; 8, tensioning mechanism; 9, edge-opening mechanism; 10, bottom plate; 11, swing rod; 12, tensioning guide wheel; 13, length measuring wheel; 14, elastic impact block; 15, mounting plate; 16, multi-groove guide wheel I; 17, multi-groove guide wheel II; 18, idler wheel mechanism; 19, mounting arm; 20, swing arm; 21, hinge shaft; 22, fixing hole; 23, arc-shaped hole; 24, single-groove wheel; 25, lifting block; 26, edge-opening stone; 27, dust suction mechanism I; 28, dust suction mechanism II; 29, linear drive mechanism; 30, moving hole; 31, servo motor I; 32, servo motor II; 33, stop block; 34, cylinder; 35, clamping block; 36, mounting block; 37, limiting groove; 38, moving block; 39, waist-shaped hole; 40, limiting block; 41, fixing block; 42, fixing screw; 43, fixing nut; 44, threaded hole; 45, adjusting screw; 46, positioning post; 47, blind hole I; 48, pressing plate; 49, spring; 50, limiting post; 51, blind hole II. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As shown in the attached Figure 1 - attached Figure 7 As shown in the figure, an edge-opening and rewinding device for a carbon steel surface electroplated with nickel and diamond composite layer wire saw includes a frame 1. An unwinding mechanism 3 and a winding mechanism 4 are arranged on the front side of the frame 1. A partition 2 is arranged between the unwinding mechanism 3 and the winding mechanism 4 on the front side of the frame 1. The unwinding mechanism 3 is installed on the partition 2. A guiding wheel 6 and a guiding-in wheel 7 are respectively arranged above the unwinding mechanism 3 and the winding mechanism 4. An edge-opening mechanism 9 is arranged on the side of the frame 1. A tensioning mechanism 8 is arranged between the unwinding mechanism 3 and the edge-opening mechanism 9. The wire saw is unwound by the winding mechanism 4. After passing through the tensioning mechanism 8, the wire saw enters the edge-opening mechanism 9. The edge-opening mechanism 9 opens the upper and lower sides of the wire saw simultaneously and then passes through the tensioning mechanism 8 again. Finally, the wire saw is wound by the tensioning mechanism 8.

[0023] The edge-opening mechanism 9 includes a mounting plate 15. On the front side of the mounting plate 15, two multi-groove guide pulleys 16 and a multi-groove guide pulley 17 are rotatably arranged. The multi-groove guide pulley 16 and the multi-groove guide pulley 17 are arranged corresponding to each other vertically. On the rear side of the mounting plate 15, a servo motor 31 and a servo motor 32 are provided. The servo motor 31 is drivingly connected to one of the multi-groove guide pulleys 16, and the servo motor 32 is drivingly connected to one of the multi-groove guide pulleys 17. The wire saw is wound around multiple times between the multi-groove guide pulley 16 and the multi-groove guide pulley 17, so that the wire saw with a nickel-plated and diamond composite layer on the surface of carbon steel can cut the edge-opening stone 26 multiple times, thereby obtaining a better edge-opening effect. At the positions on the mounting plate 15 on the sides of the multi-groove guide pulley 16 and the multi-groove guide pulley 17, a wire guiding mechanism 18 is provided respectively. The wire saw is guided into and out of the edge-opening mechanism 9 through the two wire guiding mechanisms 18 respectively. Two lifting blocks 25 are arranged on the mounting plate 15, and an edge-opening stone 26 is installed on the lifting block 25. One of the edge-opening stones 26 is located at the upper position between the two multi-groove guide pulleys 16, and the upper edge-opening stone 26 performs edge-opening on the upper side of the wire saw. The other edge-opening stone 26 is located at the position between the two multi-groove guide pulleys 17. After the wire saw bypasses the multi-groove guide pulley 16 and reaches the multi-groove guide pulley 17, the upper and lower side positions of the wire saw change, and the lower edge-opening stone 26 can perform edge-opening on the lower side of the wire saw.

[0024] A dust suction mechanism 27 and a dust suction mechanism 28 are installed on the front side of the mounting plate 15. The dust suction mechanism 27 is located on the side of the upper edge-opening stone 26, and the dust suction mechanism 27 is at the rear side along the moving direction of the wire saw. The debris generated after the wire saw cuts the upper edge-opening stone 26 is sucked by the dust suction mechanism 27. The dust suction mechanism 28 is located on the side of the lower edge-opening stone 26, and the dust suction mechanism 28 is at the rear side along the moving direction of the wire saw. The debris generated after the wire saw cuts the lower edge-opening stone 26 is sucked by the dust suction mechanism 28.

[0025] Further, a linear driving mechanism 29 is arranged on the rear side of the mounting plate 15. The lifting block 25 is drivingly installed on the linear driving mechanism 29. An activity hole 30 is provided on the mounting plate 15, and the lifting block 25 passes through the activity hole 30. The lifting block 25 is driven to move through the linear driving mechanism 29, so as to adjust the position of the edge-opening stone 26 and make the edge-opening stone 26 contact with the wire saw.

[0026] Furthermore, a stopper 33 is connected to the front side of the lifting block 25, and a cylinder 34 is installed on the front side of the lifting block 25. The cylinder 34 is driven to connect a clamping block 35. The stopper 33 and the clamping block 35 are arranged opposite to each other, and the side of the clamping block 35 facing the stopper 33 is toothed, so as to increase the friction. The device also includes a mounting block 36, and a plurality of limit grooves 37 are provided on both sides of the mounting block 36. A limit block 40 is slidably arranged in the limit groove 37, and a movable block 38 is connected to the lower part of the limit block 40. Through the cooperation between the limit block 40 and the limit groove 37, the movable block 38 can move along the length direction of the limit groove 37. A plurality of sharpening stones 26 are provided, and the sharpening stones 26 are installed between two opposite movable blocks 38. Each sharpening stone 26 sharpens the wire saw below itself. The stopper 33 and the clamping block 35 cover the limiting groove 37 when clamped, so that the limiting block 40 will not be separated from the limiting groove 37, thereby ensuring the vertical lifting of the movable block 38.

[0027] A limiting column 50 is installed in the limiting groove 37 on the right side, and a blind hole 2 51 is provided in the movable block 38 installed on the right side. The lower end of the limiting column 50 is inserted into the blind hole 2 51. The upper part of the limiting block 40 located in the limiting groove 37 on the left side is connected with a positioning column 46. A threaded hole 44 is provided in the mounting block 36 at the upper part of the limiting groove 37 on the left side. The lower end of the threaded hole 44 is connected with the upper end of the limiting groove 37 on the left side. An adjusting screw 45 is threadedly connected in the threaded hole 44. A blind hole 1 47 is provided at the lower end of the adjusting screw 45. The upper end of the positioning column 46 is extended into the blind hole 1 47. A pressing plate 48 is slidably provided in the limiting groove 37 on the left side. The positioning column 46 passes through the pressing plate 48. A spring 49 is sleeved on the positioning column 46. The upper end of the spring 49 is connected to the lower part of the pressing plate 48, and the lower end of the spring 49 is connected to the upper end of the limiting block 40. Since the diamonds are unevenly distributed on the wire saw, when the wire segment covered with more diamonds cuts the sharpening stone 26, the excessive pressure between the sharpening stone 26 and the wire saw may cause the wire saw with the composite layer of nickel and diamond electroplated on the carbon steel surface to break. By setting the spring 49, the movable block 38 has a certain buffer function, and the sharpening stone 26 has a certain space to move upward, thereby preventing the wire saw from being damaged due to excessive pressure.

[0028] By adjusting the length of the adjusting screw 45 screwed into the threaded hole 44, the height of the pressing plate 48 in the limiting groove 37 is changed, thereby adjusting the compression degree of the spring 49 and changing the buffering force of the sharpening stone 26 on the wire saw. The buffering force of each sharpening stone 26 can be adjusted separately.

[0029] The movable block 38 is provided with an oblong hole 39. A fixed block 41 is arranged inside the movable block 38. A fixed screw rod 42 is connected to the outside of the fixed block 41. The fixed screw rod 42 passes through the oblong hole 39 on the movable block 38. A fixed nut 43 is threadedly connected to the part of the fixed screw rod 42 that passes through the movable block 38. The fixed block 41 is fixed on the movable block 38 through the cooperation of the fixed nut 43 and the fixed screw rod 42. The two fixed blocks 41 on both sides act together to clamp and fix the edge-opening stone 26. The height of each edge-opening stone 26 can be adjusted separately. The edge-opening stone 26 initially contacted by the wire saw is set at the farthest distance from the wire saw, and the height of the subsequent contacted edge-opening stones 26 gradually decreases, so that the edge-opening force of the wire saw gradually increases, thus not over-damaging the wire saw and obtaining a good edge-opening effect.

[0030] The idler wheel mechanism 18 includes a mounting arm 19. A swing arm 20 is hinged on the mounting arm 19. A single-groove wheel 24 is rotatably arranged on the swing arm 20. An arc-shaped hole 23 is provided on the mounting arm 19. A plurality of fixing holes 22 are provided at the position corresponding to the arc-shaped hole 23 on the swing arm 20. One end of the mounting arm 19 far from the mounting plate 15 is fixedly provided with a hinge shaft 21. The swing arm 20 is rotatably arranged on the hinge shaft 21. The swing arm 20 can rotate around the hinge shaft 21, thereby changing the position of the single-groove wheel 24, so as to better guide the wire saw for electroplating a nickel and diamond composite layer on the surface of carbon steel.

[0031] The tensioning mechanism 8 includes a bottom plate 10. Two length measuring wheels 13 are arranged on the bottom plate 10. Encoders are coaxially arranged on the length measuring wheels 13. By detecting the number of rotations of the shafts of the length measuring wheels 13 through the encoders, the number of rotations of the length measuring wheels 13 can be obtained, and then converted into the moving meters of the wire saw. The positions of the two length measuring wheels 13 respectively correspond to the outlet wheel 6 and the inlet wheel 7. A swing rod 11 is hinged at the position on the bottom plate 10 to the right of the length measuring wheels 13. A tensioning guide wheel 12 is rotatably arranged on the swing rod 11. Elastic bumpers 14 are respectively arranged at the positions on the bottom plate 10 on the left and right sides of the swing rod 11. The elastic bumpers 14 can block the swing rod 11. The tensioning guide wheel 12 can move along with the swing of the swing rod 11, thereby tensioning the wire saw.

[0032] A lead screw displacement mechanism 5 is respectively arranged above the unwinding mechanism 3 and the winding mechanism 4. The outlet wheel 6 is installed on the lead screw displacement mechanism 5 above the unwinding mechanism 3. The inlet wheel 7 is installed on the lead screw displacement mechanism 5 above the winding mechanism 4. The positions of the outlet wheel 6 and the inlet wheel 7 can be adjusted through the lead screw displacement mechanism 5, so that the wire saw can be better led out from the unwinding mechanism 3 and better led into the winding mechanism 4.

[0033] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. An edge-opening rewinding device for a wire saw with a nickel and diamond composite layer electroplated on the surface of carbon steel, characterized in that, It includes a frame (1), a unwinding mechanism (3) and a winding mechanism (4) are arranged on the front side of the frame (1), a guiding wheel (6) and a guiding-in wheel (7) are respectively arranged above the unwinding mechanism (3) and the winding mechanism (4), a blade-opening mechanism (9) is arranged on the side surface of the frame (1), and a tensioning mechanism (8) is arranged at a position between the unwinding mechanism (3) and the blade-opening mechanism (9); The blade-opening mechanism (9) includes a mounting plate (15), two multi-groove guide wheels one (16) and a multi-groove guide wheel two (17) are rotatably arranged on the front side of the mounting plate (15), the multi-groove guide wheel one (16) and the multi-groove guide wheel two (17) are arranged corresponding to each other up and down, a servo motor one (31) and a servo motor two (32) are arranged on the rear side of the mounting plate (15), the servo motor one (31) is drivingly connected with one of the multi-groove guide wheels one (16), the servo motor two (32) is drivingly connected with one of the multi-groove guide wheels two (17), a passing wheel mechanism (18) is arranged at a position on the mounting plate (15) on the side surfaces of the multi-groove guide wheel one (16) and the multi-groove guide wheel two (17), two lifting blocks (25) are arranged on the mounting plate (15), a blade-opening stone (26) is installed on the lifting block (25), one of the blade-opening stones (26) is located at the upper position between the two multi-groove guide wheels one (16), and the other blade-opening stone (26) is located at the position between the two multi-groove guide wheels two (17); a dust suction mechanism one (27) and a dust suction mechanism two (28) are installed on the front side of the mounting plate (15); A stop block (33) is connected to the front side of the lifting block (25). A cylinder (34) is installed on the front side of the lifting block (25). The cylinder (34) is drivingly connected to a clamping block (35). The stop block (33) and the clamping block (35) are arranged oppositely. It further includes a mounting block (36). A plurality of limiting grooves (37) are formed on both the left and right sides of the mounting block (36). A limiting block (40) is slidably arranged in the limiting groove (37). The lower part of the limiting block (40) is connected to a movable block (38). A plurality of edge-opening stones (26) are provided. The edge-opening stones (26) are installed between two opposite movable blocks (38). A limiting post (50) is installed in the limiting groove (37) on the right side. A blind hole two (51) is formed in the movable block (38) on the right side. The lower end of the limiting post (50) is inserted into the blind hole two (51). The upper part of the limiting block (40) in the limiting groove (37) on the left side is connected to a positioning post (46). A threaded hole (44) is formed in the mounting block (36) at a position above the limiting groove (37) on the left side. The lower end of the threaded hole (44) communicates with the upper end of the limiting groove (37) on the left side. An adjusting screw (45) is threadedly connected in the threaded hole (44). A blind hole one (47) is formed at the lower end of the adjusting screw (45). The upper end of the positioning post (46) extends into the blind hole one (47). A pressing plate (48) is slidably arranged in the limiting groove (37) on the left side. The positioning post (46) passes through the pressing plate (48). A spring (49) is sleeved on the positioning post (46). The upper end of the spring (49) is connected to the lower part of the pressing plate (48). The lower end of the spring (49) is connected to the upper end of the limiting block (40). By adjusting the length of the adjusting screw (45) screwed into the threaded hole (44), the height of the pressing plate (48) in the limiting groove (37) is changed, thereby adjusting the compression degree of the spring (49), and the buffering force of the edge-opening stone (26) on the wire saw can be changed. The buffering force of each edge-opening stone (26) can be adjusted separately. The edge-opening stone (26) that the wire saw first contacts is set at the farthest distance from the wire saw, and the height of the subsequent contacted edge-opening stones (26) gradually decreases; An oval hole (39) is formed in the movable block (38). A fixing block (41) is arranged inside the movable block (38). A fixing screw (42) is connected to the outer side of the fixing block (41). The fixing screw (42) passes through the oval hole (39) in the movable block (38). The part of the fixing screw (42) passing through the movable block (38) is threadedly connected with a fixing nut (43). The fixing block (41) is fixed on the movable block (38) through the cooperation of the fixing nut (43) and the fixing screw (42). The two fixing blocks (41) on both sides cooperate to clamp and fix the edge-opening stone (26). The height of each edge-opening stone (26) can be adjusted separately.

2. The edge-opening rewinding device for a carbon steel surface electroplated with a nickel and diamond composite layer wire saw according to claim 1, characterized in that A linear drive mechanism (29) is provided at the rear side of the mounting plate (15). The lifting block (25) is drivingly mounted on the linear drive mechanism (29). An activity hole (30) is formed in the mounting plate (15), and the lifting block (25) is arranged through the activity hole (30).

3. The edge-opening rewinding device for a wire saw with a nickel and diamond composite layer electroplated on the surface of carbon steel according to claim 1, characterized in that, The idler wheel mechanism (18) includes a mounting arm (19). A swing arm (20) is hinged to the mounting arm (19). A single-groove wheel (24) is rotatably arranged on the swing arm (20). An arc-shaped hole (23) is formed in the mounting arm (19). A plurality of fixing holes (22) are formed in the swing arm (20) at positions corresponding to the arc-shaped hole (23).

4. The edge-opening rewinding device for a wire saw with a nickel and diamond composite layer electroplated on the surface of carbon steel according to claim 1, characterized in that, The tensioning mechanism (8) includes a bottom plate (10). Two length measuring wheels (13) are arranged on the bottom plate (10). The positions of the two length measuring wheels (13) respectively correspond to the outlet wheel (6) and the inlet wheel (7). A swing rod (11) is hinged to the position on the right side of the length measuring wheel (13) on the bottom plate (10). A tensioning guide wheel (12) is rotatably arranged on the swing rod (11). An elastic collision block (14) is arranged at each of the positions on the left and right sides of the swing rod (11) on the bottom plate (10).

5. The edge-opening rewinding device for a carbon steel surface electroplated nickel and diamond composite layer wire saw according to claim 1, characterized in that, A lead screw displacement mechanism (5) is provided above each of the unwinding mechanism (3) and the winding mechanism (4). The outlet wheel (6) is mounted on the lead screw displacement mechanism (5) above the unwinding mechanism (3). The inlet wheel (7) is mounted on the lead screw displacement mechanism (5) above the winding mechanism (4).

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