An electrical discharge cutting device for strip metal

Abstract

This utility model provides an electrical discharge machining (EDM) device for strip-shaped metal, belonging to the field of metal processing equipment. It includes a worktable and a working fluid circulation assembly. A drive assembly is located on one side of the worktable, and the EDM structure is mounted thereon, capable of vertical and horizontal movement. The working fluid circulation assembly includes a filter box, a supply pump, a tensioning wheel assembly, and a nozzle. The filter box is located inside the worktable and is used to recover and filter the working fluid. The supply pump is connected to the filter box via an inlet pipe and is also connected to the nozzle located on one side of the EDM structure via a metal hose. The tensioning wheel assembly includes several tensioning wheels located on one side of the metal hose and used to adjust the tension of the metal hose. By incorporating the tensioning wheel assembly into the working fluid circulation assembly, dynamic adjustment of the metal hose tension is achieved, effectively solving the problem of limited equipment movement caused by the hose layout in traditional working fluid circulation systems.

Description

Technical Field

[0001] This utility model belongs to the field of metal processing equipment, and in particular relates to an electric spark cutting device for strip metal. Background Technology

[0002] Electrical discharge machining (EDM) devices are precision machining equipment that utilizes the principle of electric spark discharge to process metal materials. The core principle involves applying a high-voltage current between a tool electrode (such as a copper wire) and the workpiece using a pulsed power supply, generating an instantaneous high-temperature electric spark (with a center temperature exceeding 10,000°C). This spark locally melts or vaporizes the metal, achieving cutting. During processing, the high-temperature erosion of the metal material forms a large number of micron-sized debris and molten particles. These debris and particles, mixed in the working fluid, lead to contamination, increased viscosity, and impurity accumulation, easily clogging filter pipes. Therefore, utility model patent CN217666959U provides an EDM wire cutting device for metal product processing. This device filters the working fluid using filter plates and purification plates, and performs sedimentation treatment to achieve better purification of the working fluid.

[0003] However, the device still has some drawbacks, such as the lack of a tension adjustment structure, which means that the pipe connecting the nozzle and the submersible pump does not have an adaptive tension adjustment function, limiting the movement of the nozzle or causing various problems due to the uncontrolled movement of the pipe during the movement of the nozzle. Utility Model Content

[0004] Based on the aforementioned problems in the existing technology, this utility model provides an electrical discharge cutting device for strip-shaped metal, including a worktable and a working fluid circulation assembly. A drive assembly is provided on one side of the worktable, and the electrical discharge cutting structure is mounted on the drive assembly and can be driven to move vertically and horizontally. The working fluid circulation assembly includes a filter box, a supply pump, a tensioning wheel assembly, and a nozzle. The filter box is located inside the worktable and is used to recover and filter the working fluid. The supply pump is connected to the filter box through an inlet pipe and is also connected to the nozzle located on one side of the electrical discharge cutting structure through a metal hose. The tensioning wheel assembly includes several tensioning wheels, which are located on one side of the metal hose and are used to adjust the tension of the metal hose.

[0005] The workbench has a tabletop on top for fixing and installing fixtures or molds. The filter box is located below the tabletop. The filter box has a filter chamber and a clean liquid chamber that are interconnected. A filter structure is installed in the filter chamber. The tabletop has a leakage hole that connects to the filter chamber. The inlet pipe of the liquid supply pump is connected to the clean liquid chamber.

[0006] The drive assembly includes a lifting assembly and a translation assembly. The lifting assembly includes a lifting motor fixedly installed on one side of the worktable. A lifting screw is vertically installed on the power output end of the lifting motor. A lifting platform is threadedly connected to the lifting screw. The translation assembly is installed on the lifting platform.

[0007] The worktable is symmetrically equipped with guide optical shafts on both sides of the lifting motor. The guide optical shafts are parallel to the lifting screw, and the lifting platform and the guide optical shafts are slidably connected.

[0008] The translation assembly includes two mounting platforms fixedly installed on the lifting platform. A translation motor is fixedly installed on one mounting platform, and a translation screw is horizontally installed on the power output end of the translation motor. A threaded slider is threadedly connected to the translation screw. A slide rail is fixedly installed on the other mounting platform. The slide rail is parallel to the translation screw, and a translation slider is slidably installed on the slide rail. The threaded slider and the translation slider are fixedly installed on the same translation platform. The electrical discharge cutting structure is fixedly installed on the translation platform.

[0009] The mounting platform has a downward-protruding reinforcing rib fixedly installed at its bottom, and a snap-fit ​​groove matching the lifting platform is provided at one end of the mounting platform near the lifting platform. The mounting platform is snapped into the lifting platform through the snap-fit ​​groove.

[0010] The liquid supply pump is fixedly installed at one end of a mounting platform equipped with a slide rail. The inlet pipe of the liquid supply pump extends downward and extends to the filter box. The inlet pipe is slidably connected to the worktable. An outlet is provided on one side of the liquid supply pump. One end of the metal hose is connected to the outlet, and the other end is connected to the electric spark cutting structure. The tensioning wheel includes a mounting frame fixedly installed on the translation platform. The mounting frame is elastically extended and retracted by a spring and a wheel frame is mounted on it. A guide wheel is rotatably mounted on the wheel frame. Several tensioning wheels are symmetrically and staggered on both sides of the translation platform, with the guide wheel of the tensioning wheel on one side facing the other side. The metal hose passes around several guide wheels in sequence.

[0011] A balance spring is fixedly installed on the mounting platform where the translation motor is located. The balance spring is located on the other side of the translation motor relative to the slide rail. The balance spring is connected to the translation platform, and the elastic force of the balance spring acting on the translation platform and the elastic force of the tension wheel group acting on the translation platform through the metal hose form a counterforce.

[0012] The beneficial effects of this invention are as follows: By incorporating a tensioning wheel assembly into the working fluid circulation system, dynamic adjustment of the metal hose tension is achieved, effectively solving the problem of limited equipment movement caused by the hose layout in traditional working fluid circulation systems. Specifically, the tensioning wheel assembly adjusts the tightness of the metal hose in real time according to the displacement of the EDM cutting structure. This avoids both excessively short hoses restricting the movement range of the EDM cutting structure and excessively long hoses causing risks due to swaying, bending, or entanglement. This improves the stability of the working fluid circulation, ensures that debris is efficiently carried away from the processing area and effective cooling is achieved, and enhances the equipment's adaptability to mobile processing. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of an electrical discharge cutting device for strip metal.

[0014] Figure 2 yes Figure 1 Enlarged view of point A.

[0015] Figure 3 This is a three-dimensional structural diagram of an electrical discharge cutting device for strip metal from another angle.

[0016] Figure 4 This is a three-dimensional structural diagram of an electrical discharge cutting device for strip metal, taken from another angle, which hides the drive structure and related structures thereon.

[0017] Figure 5 It refers to the internal structure of the workbench.

[0018] Figure 6 This is a bottom view schematic diagram of the drive structure and related structures.

[0019] Figure 7 This is a schematic diagram showing the connection between the liquid supply pump and the filter box. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] As attached Figure 1-7The diagram shows an electrical discharge machining (EDM) device for strip-shaped metal, comprising a worktable 1 and a working fluid circulation assembly. The working fluid circulation assembly includes a filter box 2, a fluid supply pump 3, a tensioning wheel assembly 4, and a nozzle 5. A table surface 6 is fixedly installed on the top of the worktable 1 for fixing and mounting fixtures or molds. In practical applications, corresponding fixtures or molds are made according to the characteristics of the object to be processed, and the fixtures or molds are fixedly installed on the table surface 6 using bolts or other structures to fix the object to be processed, facilitating subsequent cutting. The filter box 2 is located below the table surface 6, and a liquid collection hopper 7 is provided between the table surface 6 and the filter box 2. The filter box 2 contains interconnected filter chambers 8 and a clean liquid chamber 9. The filter chamber 8 is equipped with a filter structure composed of conventional filter components such as a purification plate 10 and a filter plate 11. Multiple leakage holes 12 are provided on the table surface 6, connecting to the liquid collection hopper 7, which in turn connects to the filter chamber 8. The filter box 2 is used to recover the working fluid.

[0022] A drive assembly is provided on one side of the worktable 1. The drive assembly includes a lifting assembly and a translation assembly. The lifting assembly includes a lifting motor 13 fixedly installed on one side of the worktable 1. A lifting screw 14 is vertically installed on the power output end of the lifting motor 13. A lifting platform 15 is threadedly connected to the lifting screw 14. The lifting motor 13 drives the lifting screw 14 to rotate, thereby raising or lowering the lifting platform 15. Guide shafts 16 are symmetrically installed on both sides of the lifting motor 13 on the worktable 1. The guide shafts 16 are parallel to the lifting screw 14. The lifting platform 15 and the guide shafts 16 are slidably connected. The guide shafts 16 improve the lifting stability and smoothness of the lifting platform 15. The translation assembly includes two mounting platforms 17 fixedly installed on the lifting platform 15. The two mounting platforms 17 are symmetrically arranged on both sides of the lifting screw 14. In practical applications, the distance between the mounting platforms 17 and the lifting screw 14 can be adjusted according to the weight of the two mounting platforms 17 to balance the force on the lifting platform 15. One mounting platform 17 is fixedly mounted with a translation motor 18. A translation screw 19 is horizontally mounted on the power output end of the translation motor 18. A threaded slider 20 is threadedly connected to the translation screw 19. Another mounting platform 17 is fixedly mounted with a slide rail 21. The slide rail 21 is parallel to the translation screw 19. A translation slider 22 is slidably mounted on the slide rail 21. The threaded slider 20 and the translation slider 22 are fixedly mounted together on the same translation platform 23. The electric spark cutting structure 24 is fixedly mounted on the translation platform 23, enabling the drive assembly to move vertically and horizontally.

[0023] The liquid supply pump 3 is fixedly installed at one end of the mounting platform 17, which is equipped with a slide rail 21. The slide rail 21 and the translation screw 19 are of equal length. The translation motor 18 and the liquid supply pump 3 are both located at the end of the mounting platform 17 near the lifting platform 15, so that the gravity is mainly concentrated at the end near the lifting platform 15, improving the lifting and translation stability of the device. The liquid supply pump 3 can be a filter pump used in conventional aquariums. The bottom of the liquid supply pump 3 is equipped with an inlet pipe 25, which extends downward through the mounting platform 17, the lifting platform 15, and the worktable 1, and extends to the clean liquid chamber 9 of the filter box 2. The worktable 1 is equipped with a linear bearing 26 that matches the inlet pipe 25, and the inlet pipe 25 is slidably connected to the worktable 1 through the linear bearing 26. The liquid supply pump 3 is equipped with an outlet on one side, which is connected to the nozzle 5 located on one side of the electric spark cutting structure 24 through a metal hose 27. The tensioning wheel group 4 includes four tensioning wheels, each of which is fixedly installed on the translation platform 23. The mounting bracket 29 is mounted on a wheel frame 30 that is elastically extended and retracted by a spring. A guide wheel 28 is rotatably mounted on the wheel frame 30. The guide wheel 28 is provided with a groove that matches the metal hose 27. Four tensioning wheels are symmetrically and staggered on both sides of the translation stage 23, with the guide wheel 28 of the tensioning wheel on one side facing the other side. One end of the metal hose 27 is connected to the liquid outlet, and the other end passes around the four guide wheels 28 in sequence before being connected to the electric spark cutting structure 24, so that the metal hose 27 forms a back-and-forth shape. The four tensioning wheels are located on one side of the metal hose 27 and are used to adjust the tension of the metal hose 27.

[0024] In a preferred embodiment, a downwardly protruding reinforcing rib 31 is fixedly installed at the bottom of the mounting platform 17. A snap-fit ​​groove 32 matching the lifting platform 15 is provided at one end of the mounting platform 17 near the lifting platform 15. The mounting platform 17 is snapped into the lifting platform 15 through the snap-fit ​​groove 32. The structure of the mounting platform 17 gives it higher structural strength and allows for more stable installation onto the lifting platform 15, improving the operational stability of the device. A balance spring 33 is fixedly installed on the mounting platform 17, which is equipped with a translation motor 18. The balance spring 33 is located on the other side of the translation motor 18 relative to the slide rail 21. The balance spring 33 is connected to the translation platform 23, and the elastic force of the balance spring 33 acting on the translation platform 23 counteracts the elastic force of the tension wheel assembly 4 acting on the translation platform 23 through the metal hose 27, resulting in a relatively balanced force on both sides of the translation platform 23 and smoother translation.

[0025] In use, the cutting device provided by this utility model first fixes the corresponding clamps or molds onto the table 6, then uses the clamps or molds to fix the metal to be cut. The lifting motor 13 is then started to drive the EDM cutting structure 24 to descend to a suitable position. Next, the translation motor 18 is started to drive the EDM cutting structure 24 towards the metal to be cut and to perform the cutting. During the translation process, when the translation table 23 moves away from the lifting table 15, the metal hose 27 is subjected to force, pulling the guide wheels 28 on both sides of the translation table 23 closer together, thus effectively extending the length of the metal hose 27 and preventing the length of the metal hose 27 from limiting the translation distance. When the translation table 23 approaches the lifting table 15, the metal hose 27 is not subjected to force, and the guide wheels 28 on both sides move away from each other under the elastic force of the springs, simultaneously tightening the metal hose 27, preventing the excessively long metal hose 27 from swinging arbitrarily and causing uncontrollable effects. The spring of the tensioning wheel can be a spring with a smaller elastic force to avoid the spring affecting the translation. The lifting motor 13 and the translation motor 18 can be stepper motors. A control system can also be installed on the cutting device to automatically control the lifting motor 13 and the translation motor 18 through a preset program. During the cutting process, the liquid supply pump 3 draws the filtered and purified working fluid from the clean liquid chamber 9 and delivers it to the nozzle 5 through the metal hose 27, and then sprays the working fluid out through the nozzle 5.

[0026] The above-described embodiments are merely one implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electrical discharge machining (EDM) device for strip metal, comprising a worktable (1) and a working fluid circulation assembly, characterized in that, A drive assembly is provided on one side of the workbench (1), and the drive assembly is equipped with an electric spark cutting structure (24) that can be driven to move vertically and horizontally. The working fluid circulation assembly includes a filter box (2), a liquid supply pump (3), a tensioning wheel assembly (4), and a nozzle (5). The filter box (2) is located inside the workbench (1) and is used to recover the working fluid. The liquid supply pump (3) is connected to the filter box (2) through an inlet pipe (25). The liquid supply pump (3) is also connected to the nozzle (5) located on one side of the electric spark cutting structure (24) through a metal hose (27). The tensioning wheel assembly (4) includes several tensioning wheels. The tensioning wheels are located on one side of the metal hose (27) and are used to adjust the tension of the metal hose (27).

2. The electrical discharge machining (EDM) device for strip metal according to claim 1, characterized in that, The top of the workbench (1) is provided with a table surface (6) for fixing and installing fixtures or molds. The filter box (2) is located below the table surface (6). The filter box (2) is provided with a filter chamber (8) and a clean liquid chamber (9) that are interconnected. A filter structure is installed in the filter chamber (8). The table surface (6) is provided with a leakage hole (12) that connects to the filter chamber (8). The inlet pipe (25) of the liquid supply pump (3) is connected to the clean liquid chamber (9).

3. The electrical discharge machining (EDM) device for strip metal according to claim 1, characterized in that, The drive assembly includes a lifting assembly and a translation assembly. The lifting assembly includes a lifting motor (13) fixedly installed on one side of the worktable (1). A lifting screw (14) is vertically installed on the power output end of the lifting motor (13). A lifting platform (15) is threadedly connected to the lifting screw (14). The translation assembly is installed on the lifting platform (15).

4. The electrical discharge cutting device for strip metal according to claim 3, characterized in that, The worktable (1) has guide optical shafts (16) symmetrically installed on both sides of the lifting motor (13). The guide optical shafts (16) and the lifting screw (14) are parallel. The lifting platform (15) and the guide optical shafts (16) are slidably connected.

5. The electrical discharge machining (EDM) device for strip metal according to claim 3, characterized in that, The translation assembly includes two mounting platforms (17) fixedly installed on the lifting platform (15). One mounting platform (17) is fixedly installed with a translation motor (18). A translation screw (19) is horizontally installed at the power output end of the translation motor (18). A threaded slider (20) is threadedly installed on the translation screw (19). The other mounting platform (17) is fixedly installed with a slide rail (21). The slide rail (21) is parallel to the translation screw (19). A translation slider (22) is slidably installed on the slide rail (21). The threaded slider (20) and the translation slider (22) are fixedly installed on the same translation platform (23). The electrical discharge machining structure (24) is fixedly installed on the translation platform (23).

6. The electrical discharge machining (EDM) device for strip metal according to claim 5, characterized in that, The bottom of the mounting platform (17) is fixedly equipped with a downward protruding reinforcing rib (31). The end of the mounting platform (17) near the lifting platform (15) is provided with a snap-fit ​​groove (32) that matches the lifting platform (15). The mounting platform (17) is snapped into the lifting platform (15) through the snap-fit ​​groove (32).

7. The electrical discharge machining (EDM) device for strip metal according to claim 5, characterized in that, The liquid supply pump (3) is fixedly installed at one end of the mounting platform (17) provided with the slide rail (21). The liquid supply pump (3) inlet pipe (25) extends downward and extends to the filter box (2). The inlet pipe (25) and the workbench (1) are slidably connected. The liquid supply pump (3) has an outlet on one side. One end of the metal hose (27) is connected to the outlet, and the other end is connected to the electric spark cutting structure (24). The tensioning wheel includes a mounting bracket (29) fixedly installed on the translation platform (23). The mounting bracket (29) is elastically extended and retracted by a spring and a wheel frame (30) is installed. A guide wheel (28) is rotatably installed on the wheel frame (30). Several tensioning wheels are symmetrically installed on both sides of the translation platform (23), and the guide wheel (28) of the tensioning wheel on one side is close to the other side. The metal hose (27) passes around several guide wheels (28) in sequence.

8. The electrical discharge machining (EDM) device for strip metal according to claim 7, characterized in that, A balance spring (33) is fixedly installed on the mounting platform (17) where the translation motor (18) is located. The balance spring (33) is located on the other side of the translation motor (18) relative to the slide rail (21). The balance spring (33) is connected to the translation platform (23). The elastic force of the balance spring (33) acting on the translation platform (23) and the elastic force of the tension wheel assembly (4) acting on the translation platform (23) through the metal hose (27) counteract each other.

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