An automatic opening and closing device for clamping and fixing electrode wires

Abstract

This invention relates to the field of electrode wires, specifically to an automatic opening and closing device for clamping and fixing electrode wires. The device includes a mounting plate, a clamping mechanism, and a tension adjusting mechanism. The clamping mechanism comprises a drive assembly, two first insert rods, two pressure rollers, two swinging assemblies, and two sliding assemblies. Each first insert rod is fixedly mounted on a sliding assembly. Each swinging assembly is mounted on the outer wall of one end of the mounting plate. Each pressure roller is rotatably mounted on a swinging assembly. The tension adjusting mechanism comprises two tensioning rollers, two fine-tuning assemblies, two traction assemblies, and two rotating assemblies. This automatic opening and closing device for clamping and fixing electrode wires prevents insufficient tension of the threaded electrode wire when the unwound length is too long, thereby avoiding processing lag due to the cutting trajectory deviating from the predetermined contour, preventing errors in workpiece shape and size, and improving the cutting effect of the workpiece.

Description

Technical Field

[0001] This invention relates to the field of electrode wires, and more specifically to an automatic opening and closing device for pressing and fixing electrode wires. Background Technology

[0002] Electrode wire, also known as molybdenum wire, is a consumable made of precious metals such as molybdenum used in wire EDM (Electrode Cutting) to continuously move and cut workpieces using a high-voltage electric field. The thin metal wire that moves continuously during the machining process on a wire EDM machine is called the electrode wire (or electrode). It can perform pulse spark discharge erosion and metal cutting. Molybdenum wire also has many other uses. The electrode wire is tightly wound onto a wire spool, which is used for unwinding and rewinding the electrode wire. A wire threading operation is required each time the wire EDM machine is used.

[0003] The existing technology has the following shortcomings:

[0004] 1. When the electrode wire is output outward on the wire storage drum, if the unwinding length is too long, the tension of the threaded electrode wire will be insufficient, that is, the electrode wire will be too loose. This will cause the cutting trajectory to deviate from the predetermined contour, resulting in processing lag. Consequently, the shape and size of the workpiece will be incorrect, which will affect the cutting effect of the workpiece.

[0005] 2. When the electrode wire is not sufficiently tensioned after being threaded, it cannot effectively cut the workpiece. In this case, the electrode wire needs to be removed manually and re-threaded, which reduces the threading efficiency, increases the threading time, and reduces the workpiece processing efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic opening and closing device for pressing and fixing electrode wires.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] An automatic opening and closing device for clamping and fixing electrode wires is provided, including a mounting plate;

[0009] It also includes a clamping mechanism and a tension adjustment mechanism;

[0010] The clamping mechanism is located on the outer wall of one end of the mounting plate. The clamping mechanism includes a drive assembly, two first insert rods, two pressure rollers, two swing assemblies, and two sliding assemblies. Both sliding assemblies are located on the mounting plate. The drive assembly is located between the two sliding assemblies. Each first insert rod is fixedly mounted on one sliding assembly. Each swing assembly is located on the outer wall of one end of the mounting plate. Each pressure roller is rotatably mounted on one swing assembly.

[0011] The tension adjustment mechanism is located beside the clamping mechanism. The tension adjustment mechanism includes two tensioning wheels, two fine-tuning components, two traction components, and two rotating components. Two first limit blocks and two second limit blocks are fixedly installed on the top and bottom of the mounting plate, respectively. L-shaped rods are fixedly installed on both the first and second limit blocks. Each rotating component is installed on an L-shaped rod. Each traction component is installed between a swing component and a rotating component. Each fine-tuning component is installed on an L-shaped rod. Each tensioning wheel is installed on a fine-tuning component.

[0012] Furthermore, an upper wire storage cylinder is rotatably provided between the two first limiting blocks, a lower wire storage cylinder is rotatably provided between the two second limiting blocks, and an upper guide wheel and a lower guide wheel are rotatably provided on the two L-shaped rods respectively.

[0013] Furthermore, the drive assembly includes an L-shaped plate, a servo motor, and a first gear. The L-shaped plate is fixedly mounted on the outer wall of the mounting plate, the servo motor is inserted into the L-shaped plate, and the first gear is fixedly mounted on its output end.

[0014] Furthermore, each sliding component includes a guide rail, a first rack, a slide rod, and a push block. The guide rail is fixedly mounted on the mounting plate, the first rack is slidably mounted inside the guide rail, and the first rack is meshed with a first gear. The slide rod is fixedly mounted at one end of the first rack, and the push block is fixedly mounted at the end of the slide rod away from the first rack, and the push block is fixedly connected to one of the first insert rods.

[0015] Furthermore, each swing assembly includes a swing arm, a first rotating shaft, and two L-shaped blocks. The two L-shaped blocks are fixedly mounted on the mounting plate. The first rotating shaft is rotatably positioned between the two L-shaped blocks. The swing arm is fixedly mounted on the outer wall of the first rotating shaft. The end of the swing arm away from the pressure roller has a clearance groove for the first insertion rod to rise and fall.

[0016] Furthermore, each traction assembly includes a connecting rod, a pull rope, a second rack, a return spring, and two grooved wheels. The connecting rod is fixedly mounted on one of the swing rods near the pressure wheel. A U-shaped plate is fixedly mounted on the top of the L-shaped rod, and a slide rail is fixedly mounted on the top of the U-shaped plate. The second rack slides on the slide rail. The pull rope is fixedly mounted between one end of the connecting rod and the second rack. A limiting plate is fixedly mounted inside the slide rail. The return spring is fixedly mounted between the limiting plate and the end of the second rack away from the pull rope. The two grooved wheels are rotatably mounted on the top end of the slide rail and the top of one of the first limiting blocks, respectively. The outer wall of the pull rope is in contact with the outer edge of the two grooved wheels.

[0017] Furthermore, each rotating component includes a second gear, a rotating rod, and a second rotating shaft. The second rotating shaft is rotatably mounted on the top of the L-shaped rod. The second gear and the rotating rod are both fixed on the second rotating shaft. The second gear meshes with the second rack. A slot is provided on the outer wall of the rotating rod.

[0018] Furthermore, the fine-tuning assembly includes a support plate, a handwheel, a lead screw, a slider, a U-shaped block, and a mounting block. The support plate is slidably mounted on the outer wall of the U-shaped plate away from the L-shaped rod via two sliding bars. The lead screw is rotatably mounted on the support plate. The handwheel is fixedly mounted on the top of the lead screw. Two guide rods are fixedly mounted on the support plate. The slider is slidably mounted on the outer wall of the two guide rods. The slider is threadedly connected to the lead screw. The U-shaped block is fixedly mounted on the slider. The mounting block is fixedly mounted on the U-shaped block. The tensioning wheel is rotatably connected to the mounting block via a bearing.

[0019] Furthermore, a second insert rod is fixedly provided on the outer wall of the support plate. The second insert rod is inserted into the slot. The end of the U-shaped plate away from the L-shaped rod is provided with a clearance notch for the second insert rod to be raised and lowered.

[0020] Furthermore, two connecting plates are fixedly installed on the outer wall of one end of the mounting plate, and each connecting plate has a positioning hole on its outer wall.

[0021] The beneficial effects of this invention are:

[0022] 1. The present invention designs a pressing mechanism, namely a driving component, two first insert rods, two pressure rollers, two swing components and two sliding components. When the electrode wire is unwound too long and becomes loose, the controller starts the driving component, thereby driving the two pressure rollers to move closer to the upper and lower wire storage drums respectively, pressing the two ends of the electrode wire first, and preventing the part of the electrode wire located in the upper and lower wire storage drums from loosening.

[0023] 2. The present invention designs a tension adjustment mechanism including two tensioning wheels, two fine-tuning components, two traction components, and two rotating components. This allows the electrode wire to be pressed by the two pressure wheels after it is threaded, with the two tensioning wheels moving synchronously towards both ends of the electrode wire until they are pressed against the ends of the electrode wire, thereby achieving automatic pressing and fixing of the electrode wire and maintaining the appropriate tension of the electrode wire.

[0024] 3. Combining the beneficial effects of points 1 and 2, it can prevent the problem of insufficient tension of the threaded electrode wire when the unwinding length is too long, thereby avoiding the phenomenon of processing lag caused by the cutting trajectory deviating from the predetermined contour, preventing errors in the shape and size of the workpiece, and improving the cutting effect of the workpiece.

[0025] 4. This invention, through the design of a fine-tuning component, allows for the adjustment of the tension wheel's height by rotating a handwheel. Even if there are differences in the length of electrode wire unwound from the wire storage spool each time, there is no need to manually remove the electrode wire and re-thread it, thus improving threading efficiency, saving threading time, and consequently improving workpiece processing efficiency.

[0026] 5. The present invention provides an automatic opening and closing device for clamping and fixing electrode wires. When it is necessary to rewind the electrode wires, the controller simply drives the output end of the servo motor to reverse, thereby resetting the two swing arms. This causes the two pressure rollers to move away from the upper and lower wire storage drums respectively, no longer clamping the electrode wires. Due to the linkage between the clamping mechanism and the tension adjustment mechanism, the two tensioning rollers also move away from the electrode wires. At this time, the electrode wires tied to the lower wire storage drum are untied, and the controller starts the drive motor to drive the upper wire storage drum to reverse, thereby rewinding the electrode wires for the next use. This achieves an automatic opening and closing effect and prevents the electrode wires from breaking due to prolonged tension, thus providing a protective effect.

[0027] 6. By designing two connecting plates, each with a positioning hole, the present invention facilitates the assembly of the device with existing wire cutting machines, and the two positioning holes facilitate the fixing of the two connecting plates with the wire cutting machine, thereby improving the compatibility of the device with existing wire cutting machines. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below.

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0030] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0031] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0032] Figure 4 for Figure 3 Enlarged view of point B in the image;

[0033] Figure 5 for Figure 3 Enlarged view of point C in the image;

[0034] Figure 6 This is a side view of the present invention;

[0035] Figure 7 This is a three-dimensional structural diagram of the tensioning wheel, fine-tuning component, traction component, and rotating component of the present invention;

[0036] Figure 8 for Figure 7 Enlarged view of point D in the image;

[0037] Figure 9 This is a partial three-dimensional structural diagram of the present invention;

[0038] Figure 10 for Figure 9 Enlarged view of point E in the image;

[0039] Figure 11 This is a three-dimensional structural diagram of the traction component and the rotation component of the present invention;

[0040] Figure 12 This is a three-dimensional structural diagram of the two first gears, two first racks, and two slide bars of the present invention;

[0041] In the diagram: Mounting plate 10, first insert rod 11, pressure roller 12, tensioning roller 13, L-shaped rod 14, upper wire storage cylinder 15, lower wire storage cylinder 16, upper guide roller 17, lower guide roller 18, L-shaped plate 19, servo motor 20, first gear 21, guide rail 22, first rack 23, slide rod 24, push block 25, swing rod 26, first rotating shaft 27, L-shaped block 28, clearance groove 29, connecting rod 30, pull rope 31, second rack 32, return spring 33, grooved wheel 34, U-shaped plate 35, slide rail 36, limit plate 37, second gear 38, rotating rod 39, second rotating shaft 40, slot 41, support plate 42, handwheel 43, lead screw 44, slider 45, U-shaped block 46, mounting block 47, slide bar 48, second insert rod 49, clearance notch 50, connecting plate 51, positioning hole 52. Detailed Implementation

[0042] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions.

[0044] This invention provides an automatic opening and closing device for clamping and fixing electrode wires, including a mounting plate 10;

[0045] It also includes a clamping mechanism and a tension adjustment mechanism;

[0046] The clamping mechanism is located on the outer wall of one end of the mounting plate 10. The clamping mechanism includes a drive assembly, two first insert rods 11, two pressure rollers 12, two swing assemblies, and two sliding assemblies. The two sliding assemblies are both located on the mounting plate 10. The drive assembly is located between the two sliding assemblies. Each first insert rod 11 is fixedly located on one sliding assembly. Each swing assembly is located on the outer wall of one end of the mounting plate 10. Each pressure roller 12 is rotatably located on one swing assembly.

[0047] The tension adjustment mechanism is located beside the pressing mechanism. The tension adjustment mechanism includes two tensioning wheels 13, two fine-tuning components, two traction components, and two rotating components. The top and bottom of the mounting plate 10 are respectively fixed with two first limit blocks and two second limit blocks. L-shaped rods 14 are fixed on both the first and second limit blocks. Each rotating component is located on an L-shaped rod 14. Each traction component is located between a swing component and a rotating component. Each fine-tuning component is located on an L-shaped rod 14. Each tensioning wheel 13 is located on a fine-tuning component.

[0048] Reference Figures 1 to 12 As shown, an upper wire storage drum 15 is rotatably positioned between two first limiting blocks, and a lower wire storage drum 16 is rotatably positioned between two second limiting blocks. An upper guide wheel 17 and a lower guide wheel 18 are rotatably positioned on two L-shaped rods 14, respectively. This device is equipped with a controller, and all electrical devices on the device are electrically connected to the controller. One end of the upper wire storage drum 15 can be connected to a drive motor (not shown in the figure). When installing the electrode wire 53, the drive motor is started by the controller, causing the upper wire storage drum 15 to rotate, releasing the electrode wire 53 wound on its outer wall. The worker passes the electrode wire 53 sequentially through the upper guide wheel 17 and the lower guide wheel 18 and then tightens it onto the lower wire storage drum 16. The motor is then turned off, stopping the unwinding of the electrode wire 53. When the electrode wire 53 is output outward from the wire storage drum, if the unwinding length is too long, the tension of the threaded electrode wire 53 will be insufficient, i.e., the electrode wire 53 will be too loose. This will cause the cutting trajectory to deviate from the predetermined contour, resulting in processing lag, thus causing errors in the workpiece shape and size, and consequently affecting the cutting effect of the workpiece.

[0049] Reference Figures 1 to 12 As shown, the drive assembly includes an L-shaped plate 19, a servo motor 20, and a first gear 21. The L-shaped plate 19 is fixedly mounted on the outer wall of the mounting plate 10. The servo motor 20 is inserted into the L-shaped plate 19. The first gear 21 is fixedly mounted on its output end. When the electrode wire 53 is unwound too long, causing the electrode wire 53 to become loose, the servo motor 20 is started by the controller. Since the first gear 21 is fixedly connected to its output end, the first gear 21 is driven to rotate through its output end.

[0050] Reference Figures 1 to 12As shown, each sliding component includes a guide rail 22, a first rack 23, a slide rod 24, and a push block 25. The guide rail 22 is fixedly mounted on the mounting plate 10. The first rack 23 is slidably mounted inside the guide rail 22 and meshes with the first gear 21. The slide rod 24 is fixedly mounted at one end of the first rack 23. The push block 25 is fixedly mounted at the end of the slide rod 24 away from the first rack 23 and is fixedly connected to one of the first insert rods 11. When the first gear 21 rotates, since the guide rail 22 is fixedly connected to the mounting plate 10, the first rack 23 is slidably connected to the guide rail 22, the first rack 23 meshes with the first gear 21, the slide rod 24 is fixedly connected to one end of the first rack 23, and the push block 25 is fixedly connected to the end of the slide rod 24 away from the first rack 23 and is fixedly connected to one of the first insert rods 11, thereby driving the first insert rod 11 to slide away from the mounting plate 10.

[0051] Reference Figures 1 to 12 As shown, each swing assembly includes a swing rod 26, a first rotating shaft 27, and two L-shaped blocks 28. Both L-shaped blocks 28 are fixedly mounted on the mounting plate 10. The first rotating shaft 27 is rotatably positioned between the two L-shaped blocks 28. The swing rod 26 is fixedly mounted on the outer wall of the first rotating shaft 27. A clearance groove 29 for the lifting and lowering of the first insertion rod 11 is provided at the end of the swing rod 26 away from the pressure roller 12. When the first insertion rod 11 slides towards the end away from the mounting plate 10, since both L-shaped blocks 28 are fixedly connected to the mounting plate 10, the first rotating shaft 27 is rotatably connected to the two L-shaped blocks 28. The swing arm 26 is fixedly connected to the first rotating shaft 27. The first insert rod 11 is inserted into the clearance groove 29 at the end of the swing arm 26 away from the pressure roller 12. Then, when the first insert rod 11 slides to the end away from the mounting plate 10, the resistance force generated by it against the clearance groove 29 is transformed into a pushing force on the end of the swing arm 26 away from the pressure roller 12. This causes the swing arm 26 to rotate around the first rotating shaft 27 as the center, driving the pressure roller 12 to rotate towards the end close to the electrode wire 53, until the pressure roller 12 presses the electrode wire 53 onto the upper wire storage cylinder 15 or the lower wire storage cylinder 16, thereby achieving the pressing and fixing of the electrode wire 53.

[0052] Reference Figures 1 to 12As shown, each traction assembly includes a connecting rod 30, a pull rope 31, a second rack 32, a return spring 33, and two grooved wheels 34. The connecting rod 30 is fixedly mounted on one end of a swing rod 26 near the pressure roller 12. A U-shaped plate 35 is fixedly mounted on the top of the L-shaped rod 14, and a slide rail 36 is fixedly mounted on the top of the U-shaped plate 35. The second rack 32 is slidably mounted on the slide rail 36. The pull rope 31 is fixedly mounted between one end of the connecting rod 30 and the second rack 32. A limiting plate 37 is fixedly mounted inside the slide rail 36. The return spring 33 is fixedly mounted between the limiting plate 37 and the end of the second rack 32 away from the pull rope 31. The two grooved wheels 34 are rotatably mounted on the top end of the slide rail 36 and the top of one of the first limiting blocks, respectively. The outer wall of the pull rope 31 is in contact with the outer edges of the two grooved wheels 34. When the swing rod 26 drives the pressure roller 12, the pull rope 30 is rotatably mounted on the top end of the slide rail 36 and the top of one of the first limiting blocks, respectively. As the rod rotates closer to the electrode wire 53, the connecting rod 30 is fixedly connected to one end of a rocker arm 26 near the pressure roller 12, the second rack 32 is slidably connected to the slide rail 36, the end of the connecting rod 30 away from the rocker arm 26 and the end of the second rack 32 are respectively fixedly connected to the two ends of the pull rope 31, the limiting plate 37 and the end of the second rack 32 away from the pull rope 31 are respectively fixedly connected to the two ends of the return spring 33, the two grooved wheels 34 are respectively rotatably connected to the top end of the slide rail 36 and the top of one of the first limiting blocks, the outer wall of the pull rope 31 is in contact with the outer edge of the two grooved wheels 34, thereby driving the second rack 32 to slide synchronously towards the end near the pressure roller 12 inside the slide rail 36. During this process, the return spring 33 is subjected to the tension generated by the sliding of the second rack 32, which changes from the initial state to the stretched state.

[0053] Reference Figures 1 to 12 As shown, each rotating component includes a second gear 38, a rotating rod 39, and a second rotating shaft 40. The second rotating shaft 40 is rotatably mounted on the top of the L-shaped rod 14. The second gear 38 and the rotating rod 39 are both fixedly mounted on the second rotating shaft 40. The second gear 38 is meshed with the second rack 32. A slot 41 is provided on the outer wall of the rotating rod 39. When the second rack 32 slides towards the end closer to the pressure roller 12 inside the slide rail 36, since the second rotating shaft 40 is rotatably connected to the L-shaped rod 14, and the second gear 38 and the rotating rod 39 are both fixedly connected to the second rotating shaft 40, and the second gear 38 is meshed with the second rack 32, the rotating rod 39 is driven to rotate away from the end of the second rack 32.

[0054] Reference Figures 1 to 12As shown, the fine-tuning assembly includes a support plate 42, a handwheel 43, a lead screw 44, a slider 45, a U-shaped block 46, and a mounting block 47. The support plate 42 is slidably mounted on the outer wall of the U-shaped plate 35 away from the L-shaped rod 14 via two sliding bars 48. The lead screw 44 is rotatably mounted on the support plate 42. The handwheel 43 is fixedly mounted on the top of the lead screw 44. Two guide rods are fixedly mounted on the support plate 42. The slider 45 is slidably mounted on the outer wall of the two guide rods and is threadedly connected to the lead screw 44. The U-shaped block 46 is fixedly mounted on the slider 45. The mounting block 47 is fixedly mounted on the U-shaped block 46. The tensioning wheel 13 is rotatably connected to the mounting block 47 via a bearing. Because the length of the electrode wire 53 unwound by the drive motor each time it drives the upper wire storage drum 15 to unwind, a fine-tuning assembly is designed. Specifically, when the two pressure rollers 12 are aligned with the upper wire storage drum 15 and the lower wire storage drum 16, the handwheel 43 is slidably mounted on the upper wire storage drum 15 and the lower wire storage drum 16. After the electrode wire 53 is tightened, the two tensioning wheels 13 that move synchronously toward the electrode wire 53 do not provide sufficient pressure on both ends of the electrode wire 53 after they are in place, meaning that the electrode wire 53 is still in a relatively loose state. At this time, by manually rotating the handwheel 43, since the handwheel 43 is fixedly connected to the lead screw 44, and the two ends of the lead screw 44 are rotatably connected to the support plate 42, the slider 45 is slidably connected to the two guide rods, the slider 45 is threadedly connected to the lead screw 44, and the slider 45 is fixedly connected to the mounting block 47 through the U-shaped block 46, and the tensioning wheel 13 is rotatably connected to the mounting block 47, the lead screw 44 rotates and drives the slider 45 to slide toward the end closer to the electrode wire 53, and then the slider 45 drives the tensioning wheel 13 to move closer to the electrode wire 53 until the outer edge of the tensioning wheel 13 contacts the outer wall of the electrode wire 53, thus achieving the tensioning requirement of the electrode wire 53 and improving the flexibility of the device.

[0055] Reference Figures 1 to 12 As shown, a second insert rod 49 is fixedly provided on the outer wall of the support plate 42. The second insert rod 49 is inserted into the slot 41. The end of the U-shaped plate 35 away from the L-shaped rod 14 is provided with a clearance notch 50 for the second insert rod 49 to rise and fall. When the rotating rod 39 rotates to the end away from the second rack 32, since the support plate 42 is fixedly connected to the second insert rod 49 and the second insert rod 49 is inserted into the slot 41, the contact force generated between the slot 41 and the second insert rod 49 when the rotating rod 39 rotates causes the second insert rod 49 to slide vertically inside the clearance notch 50. Since the tensioning wheel 13 is designed on the support plate 42, it drives the tensioning wheel 13 to slide towards the end closer to the electrode wire 53 until it is pressed against the electrode wire 53, preventing the electrode wire 53 from being too loose and reducing the cutting effect on the workpiece. This is beneficial to improving the processing accuracy and cutting quality of the workpiece.

[0056] Reference Figures 1 to 12As shown, two connecting plates 51 are fixedly provided on the outer wall of one end of the mounting plate 10. Each connecting plate 51 has a positioning hole 52 on its outer wall. The two connecting plates 51 facilitate the assembly of this device with existing wire cutting machines, and the two positioning holes 52 facilitate the fixing of the two connecting plates 51 with the wire cutting machine, thereby improving the matching effect of this device.

[0057] The working principle of this invention is as follows: the two connecting plates 51 facilitate the assembly of this device with existing wire cutting machines, and the two positioning holes 52 facilitate the fixing of the two connecting plates 51 with the wire cutting machine, thereby improving the matching effect of this device.

[0058] This device is equipped with a controller, and all electrical devices on the device are electrically connected to the controller. One end of the upper wire storage drum 15 can be connected to a drive motor. When installing the electrode wire 53, the drive motor is started through the controller, which causes the upper wire storage drum 15 to rotate, so that the electrode wire 53 wound on its outer wall is released. The worker passes the electrode wire 53 through the upper guide wheel 17 and the lower guide wheel 18 in sequence and then ties it to the lower wire storage drum 16. Then the motor is turned off to stop the unwinding of the electrode wire 53. When the electrode wire 53 is output outward on the wire storage drum, if the unwinding length is too long, the tension of the threaded electrode wire 53 will be insufficient, that is, the electrode wire 53 will be too loose, which will cause the cutting trajectory to deviate from the predetermined contour, resulting in processing lag. This will cause errors in the shape and size of the workpiece, and thus affect the cutting effect of the workpiece.

[0059] When the unwinding length of electrode wire 53 is too long, causing electrode wire 53 to be too loose, the servo motor 20 is started by the controller. Since the first gear 21 is fixedly connected to its output end, the first gear 21 is driven to rotate through its output end.

[0060] When the first gear 21 rotates, since the guide rail 22 is fixedly connected to the mounting plate 10, the first rack 23 is slidably connected to the guide rail 22, the first rack 23 is meshed with the first gear 21, the slide rod 24 is fixedly connected to one end of the first rack 23, the push block 25 is fixedly connected to the end of the slide rod 24 away from the first rack 23, and the push block 25 is fixedly connected to one of the first insert rods 11, thereby driving the first insert rod 11 to slide towards the end away from the mounting plate 10.

[0061] When the first insertion rod 11 slides away from the mounting plate 10, since both L-shaped blocks 28 are fixedly connected to the mounting plate 10, the first rotating shaft 27 is rotatably connected to the two L-shaped blocks 28, the swing rod 26 is fixedly connected to the first rotating shaft 27, and the first insertion rod 11 and the swing rod 26 are inserted into the clearance groove 29 at the end away from the pressure roller 12. Then, the resistance force generated by the first insertion rod 11 sliding away from the mounting plate 10 and the clearance groove 29 is transformed into a pushing force on the end of the swing rod 26 away from the pressure roller 12. This causes the swing rod 26 to rotate around the first rotating shaft 27 as the center, driving the pressure roller 12 to rotate towards the end closer to the electrode wire 53, until the pressure roller 12 presses the electrode wire 53 onto the upper wire storage cylinder 15 or the lower wire storage cylinder 16, thereby achieving the pressing and fixing of the electrode wire 53.

[0062] As the swing arm 26 drives the pressure roller 12 to rotate and approach the electrode wire 53, the connecting rod 30 is fixedly connected to the end of the swing arm 26 near the pressure roller 12, the second rack 32 is slidably connected to the slide rail 36, the end of the connecting rod 30 away from the swing arm 26 and the end of the second rack 32 are respectively fixedly connected to the two ends of the pull rope 31, the limiting plate 37 and the end of the second rack 32 away from the pull rope 31 are respectively fixedly connected to the two ends of the return spring 33, the two grooved wheels 34 are respectively rotatably connected to the top end of the slide rail 36 and the top of one of the first limiting blocks, the outer wall of the pull rope 31 is in contact with the outer edge of the two grooved wheels 34, thereby driving the second rack 32 to slide synchronously towards the end of the pressure roller 12 inside the slide rail 36. During this process, the return spring 33 is subjected to the tension generated by the sliding of the second rack 32, which changes from the initial state to the stretched state.

[0063] When the second rack 32 slides inside the slide rail 36 toward the end closer to the pressure roller 12, since the second rotating shaft 40 is rotatably connected to the L-shaped rod 14, the second gear 38 and the rotating rod 39 are both fixedly connected to the second rotating shaft 40, and the second gear 38 is meshed with the second rack 32, thereby driving the rotating rod 39 to rotate toward the end away from the second rack 32.

[0064] When the rotating rod 39 rotates to the end away from the second rack 32, since the support plate 42 is fixedly connected to the second insert rod 49, the second insert rod 49 is inserted into the slot 41. As the rotating rod 39 rotates, the opposing force generated by the slot 41 and the second insert rod 49 causes the second insert rod 49 to slide vertically inside the clearance notch 50. Since the tensioning wheel 13 is designed on the support plate 42, it is driven to slide towards the end closer to the electrode wire 53 until the electrode wire 53 is tightened. This prevents the electrode wire 53 from being too loose and reducing the cutting effect on the workpiece, which is beneficial to improving the processing accuracy and cutting quality of the workpiece.

[0065] Because the length of electrode wire 53 unwound by the drive motor varies each time it drives the upper wire storage drum 15 to unwind the wire, a fine-tuning component is designed. Specifically, after the two pressure rollers 12 press the electrode wire 53 on the upper wire storage drum 15 and the lower wire storage drum 16, the two tensioning rollers 13, which move synchronously towards the electrode wire 53, do not provide sufficient pressure on both ends of the electrode wire 53 after they are in place, meaning the electrode wire 53 is still in a relatively loose state. At this time, by manually rotating the handwheel 43, since the handwheel 43 is fixedly connected to the lead screw 44, and the two ends of the lead screw 44 are connected to the support plate... The slider 45 is slidably connected to the two guide rods and threadedly connected to the lead screw 44. The slider 45 is also fixedly connected to the mounting block 47 via the U-shaped block 46. The tension wheel 13 is rotatably connected to the mounting block 47, which causes the lead screw 44 to rotate and drive the slider 45 to slide closer to the end of the electrode wire 53. Then, the slider 45 drives the tension wheel 13 to move closer to the electrode wire 53 until the outer edge of the tension wheel 13 contacts the outer wall of the electrode wire 53, thus achieving the tension requirement of the electrode wire 53 and improving the flexibility of the device.

[0066] When it is necessary to wind up the electrode wire 53, the controller simply drives the output end of the servo motor 20 to reverse, thereby resetting the two swing arms 26. This causes the two pressure rollers 12 to move away from the upper wire storage drum 15 and the lower wire storage drum 16 respectively, no longer pressing the electrode wire 53. Due to the linkage between the pressing mechanism and the tension adjustment mechanism, the two tensioning rollers 13 also move away from the electrode wire 53. At this time, the electrode wire 53 tied to the lower wire storage drum 16 is untied, and the controller starts the drive motor to drive the upper wire storage drum 15 to reverse, thereby winding up the electrode wire 53 for the next use. This achieves an automatic opening and closing effect and prevents the electrode wire 53 from breaking due to prolonged tension, thus providing a protective effect.

Claims

1. An automatic opening and closing device for clamping and fixing electrode wires, comprising a mounting plate (10), characterized in that: It also includes a clamping mechanism and a tension adjustment mechanism; The clamping mechanism is located on the outer wall of one end of the mounting plate (10). The clamping mechanism includes a drive assembly, two first insert rods (11), two pressure rollers (12), two swing assemblies, and two sliding assemblies. The two sliding assemblies are located on the mounting plate (10), and the drive assembly is located between the two sliding assemblies. Each first insert rod (11) is fixedly mounted on a sliding assembly. Each swing assembly is located on the outer wall of one end of the mounting plate (10), and each pressure roller (12) is rotatably mounted on a swing assembly. The tension adjustment mechanism is located on the side of the pressing mechanism. The tension adjustment mechanism includes two tensioning wheels (13), two fine adjustment components, two traction components and two rotating components. The top and bottom of the mounting plate (10) are respectively fixed with two first limit blocks and two second limit blocks. L-shaped rods (14) are fixed on the first limit blocks and the second limit blocks. Each rotating component is located on an L-shaped rod (14). Each traction component is located between a swing component and a rotating component. Each fine adjustment component is located on an L-shaped rod (14). Each tensioning wheel (13) is located on a fine adjustment component. Each sliding assembly includes a guide rail (22), a first rack (23), a slide bar (24), and a push block (25). The guide rail (22) is fixedly mounted on the mounting plate (10). The first rack (23) is slidably mounted inside the guide rail (22). The first rack (23) is meshed with the first gear (21). The slide bar (24) is fixedly mounted at one end of the first rack (23). The push block (25) is fixedly mounted at the end of the slide bar (24) away from the first rack (23), and the push block (25) is fixedly connected to one of the first insert rods (11). Each swing assembly includes a swing arm (26), a first rotating shaft (27) and two L-shaped blocks (28). The two L-shaped blocks (28) are fixed on the mounting plate (10). The first rotating shaft (27) is rotatably positioned between the two L-shaped blocks (28). The swing arm (26) is fixed on the outer wall of the first rotating shaft (27). The end of the swing arm (26) away from the pressure roller (12) is provided with a clearance groove (29) for the first insertion rod (11) to rise and fall. Each traction assembly includes a connecting rod (30), a pull rope (31), a second rack (32), a return spring (33), and two grooved wheels (34). The connecting rod (30) is fixedly mounted on one end of one of the swing rods (26) near the pressure wheel (12). A U-shaped plate (35) is fixedly mounted on the top of the L-shaped rod (14). A slide rail (36) is fixedly mounted on the top of the U-shaped plate (35). The second rack (32) is slidably mounted on the slide rail (36). The pull rope (31) is fixedly mounted between one end of the connecting rod (30) and the second rack (32). A limiting plate (37) is fixedly mounted inside the slide rail (36). The return spring (33) is fixedly mounted between the limiting plate (37) and the end of the second rack (32) away from the pull rope (31). The two grooved wheels (34) are rotatably mounted on the top end of the slide rail (36) and the top of one of the first limiting blocks, respectively. The outer wall of the pull rope (31) is in contact with the outer edge of the two grooved wheels (34). Each rotating component includes a second gear (38), a rotating rod (39), and a second rotating shaft (40). The second rotating shaft (40) is rotatably mounted on the top of the L-shaped rod (14). The second gear (38) and the rotating rod (39) are both fixed on the second rotating shaft (40). The second gear (38) meshes with the second rack (32). A slot (41) is provided on the outer wall of the rotating rod (39). The fine-tuning component includes a support plate (42), on the outer wall of the support plate (42) a second insert rod (49) is fixedly provided, the second insert rod (49) is inserted into the slot (41), and the U-shaped plate (35) is provided with a clearance notch (50) at the end away from the L-shaped rod (14) for the second insert rod (49) to rise and fall.

2. The automatic opening and closing device for clamping and fixing electrode wires according to claim 1, characterized in that: An upper wire storage cylinder (15) is rotatably provided between the two first limiting blocks, and a lower wire storage cylinder (16) is rotatably provided between the two second limiting blocks. An upper guide wheel (17) and a lower guide wheel (18) are rotatably provided on the two L-shaped rods (14).

3. The automatic opening and closing device for clamping and fixing electrode wires according to claim 2, characterized in that: The drive assembly includes an L-shaped plate (19), a servo motor (20), and a first gear (21). The L-shaped plate (19) is fixed on the outer wall of the mounting plate (10), the servo motor (20) is inserted into the L-shaped plate (19), and the first gear (21) is fixed on its output end.

4. The automatic opening and closing device for clamping and fixing electrode wires according to claim 3, characterized in that: The fine-tuning assembly also includes a handwheel (43), a lead screw (44), a slider (45), a U-shaped block (46), and a mounting block (47). The support plate (42) is slidably mounted on the outer wall of the U-shaped plate (35) away from the L-shaped rod (14) via two slide bars (48). The lead screw (44) is rotatably mounted on the support plate (42). The handwheel (43) is fixedly mounted on the top of the lead screw (44). Two guide rods are fixedly mounted on the support plate (42). The slider (45) is slidably mounted on the outer wall of the two guide rods. The slider (45) is threadedly connected to the lead screw (44). The U-shaped block (46) is fixedly mounted on the slider (45). The mounting block (47) is fixedly mounted on the U-shaped block (46). The tension wheel (13) is rotatably connected to the mounting block (47) via a bearing.

5. The automatic opening and closing device for clamping and fixing electrode wires according to claim 4, characterized in that: Two connecting plates (51) are fixedly provided on the outer wall of one end of the mounting plate (10), and each connecting plate (51) has a positioning hole (52) on its outer wall.

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