Cooling liquid circulating treatment device for linear cutting machining

Abstract

The utility model relates to a cooling liquid circulating treatment device for wire cutting machining, and belongs to the technical field of wire cutting, the cooling liquid circulating treatment device comprises a workbench, a bearing box is arranged on the workbench, a first filter screen and a first brush are arranged in the bearing box, the first filter screen partitions the inner space of the bearing box, and the first filter screen is fixedly connected with the inner wall of a partition box; a long-strip-shaped hole is formed in the vertical side wall of the bearing box, and the long-strip-shaped hole is formed in the length direction of the first filter screen and is parallel to the first filter screen. A driving assembly is arranged on the bearing box and comprises a motor, a screw and a sliding block, the first brush is located above the first filter screen, one end of the first brush penetrates through the long-strip-shaped hole and then is connected with the sliding block, the screw penetrates through the sliding block and is in threaded connection with the sliding block, and the sliding block slidably abuts against the outer wall of the bearing box. The motor is fixed to the outer wall of the bearing box, the output end of the motor is fixedly connected with one end of the screw, and the screw is arranged in the length direction of the long-strip-shaped hole.

Description

Technical Field

[0001] This application relates to the technical field of wire EDM, and in particular to a coolant circulation treatment device for wire EDM processing. Background Technology

[0002] Wire EDM is a machining method that uses a moving thin metal wire (such as molybdenum wire or copper wire) as an electrode to cut the workpiece through pulsed discharge. It is available in fast wire EDM and slow wire EDM types, and can process complex-shaped workpieces with high precision. It is widely used in mold and precision parts manufacturing. Coolant cooling and chip removal are required during the process.

[0003] The wire EDM coolant is circulated by a pump that delivers the coolant to the machining area, specifically by spraying it onto the wire EDM nozzle. Used coolant is filtered through a screen to remove impurities and then returned to the water tank or heat exchanger for further cooling. After cooling, it is circulated again by the pump. Temperature control and concentration monitoring are necessary during this circulation process to ensure coolant cleanliness, maintain machining accuracy, and extend equipment lifespan. This method is commonly used in fast wire EDM and slow wire EDM machining scenarios.

[0004] In practical applications, filters can become clogged after prolonged use, and cleaning them requires removing them, which is inconvenient. Utility Model Content

[0005] To improve the ease of cleaning the filter screen, this application provides a coolant circulation treatment device for wire EDM processing.

[0006] The coolant circulation treatment device for wire EDM provided in this application adopts the following technical solution:

[0007] A coolant circulation treatment device for wire EDM includes a worktable with a carrier box on the worktable. The top of the carrier box is equipped with a wire EDM device, a clamping platform for holding the workpiece to be cut, and a nozzle for spraying coolant. The carrier box is hollow inside, with a water-permeable hole at the top. A second filter screen is fixedly covered at the water-permeable hole. A first filter screen and a first brush are installed inside the carrier box. The first filter screen isolates the internal space of the carrier box and is fixedly connected to the inner wall of the isolation box. An elongated hole is opened on the vertical side wall of the carrier box, running parallel to the length of the first filter screen. A drive assembly is installed on the carrier box, including a motor, a screw, and a slider. The first brush is located above the first filter screen, with one end passing through the elongated hole and connected to the slider. The screw passes through the slider and is threadedly connected to it. The slider slides against the outer wall of the carrier box. The motor is fixed to the outer wall of the carrier box, and its output end is fixedly connected to one end of the screw, which runs along the length of the elongated hole.

[0008] By adopting the above technical solution, the motor drives the screw to rotate, causing the slider to move back and forth along the elongated hole, thereby allowing the first brush to scrub the surface of the first filter screen. This structure enables online cleaning without removing the filter screen, avoiding downtime losses caused by disassembly. The first filter screen isolates the internal space of the carrier box, intercepting impurities in the coolant. The mechanical scrubbing of the brush can promptly remove debris and sludge adhering to the surface of the filter screen, maintaining the filter screen's permeability, ensuring smooth coolant circulation, and improving the convenience and efficiency of filter screen cleaning.

[0009] Optionally, a protective cover is fixed to the outer wall of the carrier box, and the protective cover covers the screw, slider and elongated hole.

[0010] By adopting the above technical solution, the protective cover encloses the screw, slider, and elongated hole, which can prevent coolant from flowing out from the elongated hole and reduce coolant loss during circulation operation.

[0011] Optionally, the protective cover is provided with a rack and a gear. The rack is fixed on the inner wall of the protective cover. The length of the rack is set along the length of the elongated hole. The gear meshes with the rack. One end of the first brush passes through the elongated hole and the slider and is fixedly connected to the center of the gear. The first brush is rotatably connected to the slider. The first brush is in the shape of a roller.

[0012] By adopting the above technical solution, the slider moves, driving the gear to roll along the rack, causing the roller-shaped first brush to rotate synchronously. The combination of brush rotation and reciprocating movement forms a "rolling brushing" mode, which, compared to simple horizontal brushing, can more thoroughly remove stubborn impurities from the filter pores, enhancing the cleaning effect. The curved design of the roller brush increases the contact area with the filter, and the centrifugal force generated during rotation can dislodge impurities from the brush head, avoiding secondary contamination and improving the efficiency and quality of filter cleaning.

[0013] Optionally, the first filter screen is inclined, with the inclination direction being inclined downwards away from the water permeable holes, and a discharge port is provided on the carrier box, with the discharge port located at the lowest end of the first filter screen.

[0014] By adopting the above technical solution, the tilted first filter screen allows intercepted impurities to slide towards the lowest point under gravity, with the discharge port located at the lowest point for easy and concentrated discharge of impurities. This design reduces the amount of impurities accumulated on the filter screen, lessens the cleaning burden on the brush, and prevents long-term accumulation of impurities from clogging the filter screen. Impurities can be quickly discharged by periodically opening the discharge port without disassembling the filter screen, further simplifying the cleaning process and improving operational convenience.

[0015] Optionally, the top of the carrier box is inclined, with the inclination direction being inclined downwards near the water permeable hole.

[0016] By adopting the above technical solution, the top of the carrier tank is tilted towards the water permeable hole, allowing the coolant dripping from the processing area to quickly flow towards the water permeable hole, carrying impurities. This reduces the coolant's residence time at the top and prevents impurities from accumulating. The tilted surface guides the coolant for concentrated filtration, improving the filtration efficiency of the second filter screen. Simultaneously, it prevents coolant from overflowing the carrier tank, maintaining a clean working environment and providing favorable conditions for subsequent coolant circulation.

[0017] Optionally, the top of the carrier box is provided with an inverted eave, and a second brush is slidably disposed on the inverted eave, the second brush sliding along the length direction of the second filter screen.

[0018] By adopting the above technical solution, the inverted eaves provide a sliding track for the second brush, allowing workers to manually or via a drive device slide the second brush along the length of the second filter screen to remove impurities from its surface. The second filter screen covers the permeable holes, intercepting larger particles. The brush design allows for online cleaning of the second filter screen, preventing clogging and ensuring efficient coolant drainage. Combined with the cleaning structure of the first filter screen, this forms a convenient dual-filter cleaning system, guaranteeing effective coolant filtration.

[0019] Optionally, the second brush is provided with a slide and a ball bearing. The slide is fixedly connected to the second brush and slidably connected to the reverse eaves. The ball bearing is rotatably disposed on the slide and is located between the slide and the reverse eaves. The ball bearing rolls and abuts against the outer wall of the reverse eaves.

[0020] By adopting the above technical solution, the ball bearings between the slide and the reflector convert sliding friction into rolling friction, reducing the moving resistance of the second brush and making the brush slide more smoothly. Workers need less effort to push the brush, and the rolling friction reduces component wear, extending the service life of the slide and reflector, ensuring long-term stable operation of the second brush, and improving the convenience and reliability of the second filter cleaning operation.

[0021] Optionally, the carrier box is provided with a backflush pipe, one end of which is used to communicate with the external coolant, and the other end extends into the carrier box and is fixed with a nozzle, which is positioned facing the bottom surface of the first filter screen.

[0022] By adopting the above technical solution, the backflushing pipe is connected to an external high-pressure coolant, and the nozzle sprays high-pressure water towards the bottom surface of the first filter screen, impacting impurities from the back of the screen. This design, together with the front brushing of the first brush, forms a two-way cleaning process, effectively removing stubborn impurities from the filter screen pores, especially suitable for highly viscous sludge or fine metal particles. Backflushing cleaning does not require disassembling the filter screen and can be performed online. Working synergistically with brush cleaning, it significantly improves the cleaning effect and convenience of the filter screen, maintaining the efficient operation of the coolant circulation system.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. High-efficiency online cleaning: The motor-driven screw and slider structure drives the first brush to reciprocate and wash, combined with the high-pressure flushing on the back of the back flushing pipe, to achieve bidirectional online cleaning of the first filter screen. There is no need to disassemble the filter screen, which greatly reduces downtime and significantly improves the filter screen cleaning efficiency and the continuity of coolant circulation.

[0025] 2. Dual-Filter Protection and Cleaning: The second filter, with its permeable pores, intercepts large particles of impurities, while a sliding second brush performs surface cleaning. The first filter deeply filters fine impurities, and its inclined design and discharge port allow for automatic discharge. The dual filters and corresponding cleaning structure form a tiered filtration and convenient cleaning system, effectively ensuring the cleanliness of the coolant.

[0026] 3. Structural optimization and enhanced durability: The protective cover prevents coolant and metal debris from entering the drive components, extending the service life of components such as the motor and screw; the ball bearings reduce the sliding resistance of the second brush, and the roller-shaped first brush combined with gears and racks achieves efficient self-rotation cleaning. The design of each structure reduces mechanical wear and improves the overall reliability and service life of the device. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0028] Figure 2 This is a vertical structural cross-sectional view of an embodiment of this application;

[0029] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0030] Figure 4 This is a partial structural cross-sectional view of the slider.

[0031] In the diagram, 1. Workbench; 11. Wire cutting device; 12. Clamping platform; 13. Nozzle; 2. Carrier box; 21. Water permeable hole; 22. Second filter screen; 23. First filter screen; 24. First brush; 25. Long strip hole; 26. Discharge port; 3. Drive assembly; 31. Motor; 32. Screw; 33. Slider; 4. Protective cover; 41. Rack; 42. Gear; 5. Reverse flange; 51. Second brush; 52. Slide seat; 53. Ball bearing; 6. Backflush pipe; 61. Nozzle. Detailed Implementation

[0032] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0033] This application discloses a coolant circulation treatment device for wire EDM machining.

[0034] refer to Figure 1The coolant circulation treatment device includes a workbench 1 and a support box 2. The workbench 1 serves as the basic support structure, providing a stable installation platform for the entire device. The support box 2 is fixed to the top of the workbench 1, and a wire cutting device 11, a clamping platform 12, and a nozzle 13 are installed on the top of the support box 2. The clamping platform 12 is used to securely clamp the workpiece to be cut. The wire cutting device 11 uses fine metal wires such as molybdenum wire or copper wire as electrodes to perform pulsed discharge cutting on the workpiece. The nozzle 13 is used to spray coolant into the wire cutting processing area to cool the electrode wire and the workpiece, and to flush away metal debris and other impurities generated during cutting. The wire cutting device 11, the clamping platform 12, and the nozzle 13 are all existing technologies and will not be described in detail.

[0035] refer to Figure 1 and Figure 2 The carrier box 2 has a hollow cavity inside, with a water permeable hole 21 at the top. A second filter screen 22 is covered and fixedly installed at the water permeable hole 21. After use, the coolant flows back to the top of the carrier box 2 and first passes through the second filter screen 22. The second filter screen 22 can intercept larger particulate impurities in the coolant, preventing them from entering the interior of the carrier box 2. A first filter screen 23 is horizontally arranged inside the carrier box 2 and is fixedly connected to the inner wall of the carrier box 2, dividing the interior of the carrier box 2 into upper and lower spaces for secondary fine filtration of the coolant that has passed through the second filter screen 22. The first filter screen 23 is inclined downward away from the water permeable hole 21. At the lowest point of the first filter screen 23, a discharge port 26 is opened on the side wall of the carrier box 2 to facilitate the centralized discharge of intercepted impurities.

[0036] refer to Figure 1 and Figure 3 The top of the carrier box 2 is inclined, with the inclination direction facing the water permeable hole 21, allowing the coolant dripping from the processing area to quickly collect and flow into the water permeable hole 21. An inverted eave 5 is provided at the top edge of the carrier box 2, and a second brush 51 is slidably mounted on the inverted eave 5. A slide block 52 is fixedly connected to the bottom of the second brush 51, and the slide block 52 is slidably connected to the inverted eave 5. A ball bearing 53 is installed between the slide block 52 and the inverted eave 5, rotating on the slide block 52 and rolling against the outer wall of the inverted eave 5. By manually pushing, the second brush 51 can slide along the length of the second filter screen 22, cleaning the surface of the second filter screen 22 and preventing clogging that could affect the coolant seepage efficiency.

[0037] refer to Figure 1 , Figure 2 and Figure 4An elongated hole 25 is provided on the vertical side wall of the carrier box 2. The elongated hole 25 is opened along the length direction of the first filter screen 23 and is parallel to the first filter screen 23. A drive assembly 3 is provided on the outside of the carrier box 2. The drive assembly 3 includes a motor 31, a screw 32 and a slider 33. The motor 31 is fixedly installed on the outer wall of the carrier box 2, and its output shaft is fixedly connected to one end of the screw 32. The screw 32 is horizontally arranged along the length direction of the elongated hole 25 and passes through the slider 33, forming a threaded connection with the slider 33. The slider 33 slides against the outer wall of the carrier box 2 and can reciprocate along the axis of the screw 32. The first brush 24 is located above the first filter screen 23. One end of its brush passes through the elongated hole 25 and is rotatably connected to the slider 33. When the motor 31 drives the screw 32 to rotate, the slider 33 drives the first brush 24 to reciprocate along the length direction of the first filter screen 23, cleaning the surface of the first filter screen 23.

[0038] refer to Figure 1 , Figure 2 and Figure 4 To protect the drive assembly 3, a protective cover 4 is fixedly installed on the outer wall of the carrier box 2, completely enclosing the screw 32, slider 33, and elongated hole 25. A rack 41 is fixedly installed on the inner wall of the protective cover 4, with its length aligned with the elongated hole 25. A gear 42 meshes with the rack 41. One end of the first brush 24 passes through the elongated hole 25 and the slider 33, and is fixedly connected to the center of the gear 42, meaning the first brush 24 rotates relative to the slider 33. The first brush 24 adopts a roller-shaped design. When the slider 33 moves, the gear 42 rolls along the rack 41, causing the roller-shaped first brush 24 to rotate synchronously, achieving rolling brushing of the first filter screen 23 and enhancing the cleaning effect.

[0039] refer to Figure 1 and Figure 2 A backflush pipe 6 is installed on the side wall of the carrier box 2. One end of the backflush pipe 6 is connected to an external high-pressure coolant source through a pipe interface, and the other end extends through the side wall of the carrier box 2 into the interior. A nozzle 61 is fixedly installed at the end, and the nozzle 61 is set facing the bottom surface of the first filter screen 23. When deep cleaning of the first filter screen 23 is required, the external high-pressure pump is turned on, and the high-pressure coolant is sprayed out from the nozzle 61 through the backflush pipe 6, impacting impurities from the back of the first filter screen 23. This forms a two-way cleaning with the brushing of the front of the first brush 24, effectively removing stubborn impurities in the filter screen pores.

[0040] The working process of this embodiment is as follows: During wire EDM, nozzle 13 sprays coolant to cool and remove chips from the processing area. The used coolant, carrying impurities, flows back to the top of the carrier box 2 and, guided by the inclined top surface, flows to the water permeable hole 21. Large particles of impurities are first intercepted by the second filter screen 22. The coolant passes through the second filter screen 22 and enters the interior of the carrier box 2, where it undergoes secondary filtration through the inclined first filter screen 23. During the filtration process, motor 31 drives screw 32 to rotate, causing slider 33 and first brush 24 to move back and forth along the first filter screen 23. At the same time, gear 42 and rack 41 cooperate to make the first brush 24 rotate, achieving efficient cleaning of the first filter screen 23. Through slide 52 and ball bearing 53, second brush 51 can slide on the back flange 5 to clean the second filter screen 22. When the first filter screen 23 is severely clogged, the external high-pressure pump is started, and nozzle 61 in backwash pipe 6 sprays high-pressure coolant onto the bottom surface of the first filter screen 23 for backwashing. Impurities intercepted by the first filter screen 23 slide down to the discharge port 26 under gravity. The discharge port can be opened periodically to discharge the impurities. The filtered coolant is discharged from the carrier tank 2 and is recycled after subsequent cooling, concentration adjustment and other treatments.

[0041] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A coolant circulation treatment device for wire EDM, comprising a worktable (1), a support box (2) on the worktable (1), a wire EDM device (11), a clamping platform (12) for supporting the workpiece to be cut, and a nozzle (13) for spraying coolant on the top of the support box (2), characterized in that: The carrier box (2) is hollow inside. A water-permeable hole (21) is provided on the top of the carrier box (2). A second filter screen (22) is fixedly covered at the water-permeable hole (21). A first filter screen (23) and a first brush (24) are provided inside the carrier box (2). The first filter screen (23) separates the internal space of the carrier box (2) and is fixedly connected to the inner wall of the partition box. An elongated hole (25) is provided on the vertical side wall of the carrier box (2). The elongated hole (25) is opened along the length direction of the first filter screen (23) and is parallel to the first filter screen (23). The drive assembly (3) is provided on the first filter screen (23). The drive assembly (3) includes a motor (31), a screw (32) and a slider (33). The first brush (24) is located above the first filter screen (23) and one end passes through the elongated hole (25) and is connected to the slider (33). The screw (32) passes through the slider (33) and is threadedly connected to the slider (33). The slider (33) slides against the outer wall of the carrier box (2). The motor (31) is fixed on the outer wall of the carrier box (2) and its output end is fixedly connected to one end of the screw (32). The screw (32) is set along the length direction of the elongated hole (25).

2. The coolant circulation treatment device for wire EDM machining according to claim 1, characterized in that: The outer wall of the carrier box (2) is fixed with a protective cover (4), which covers the screw (32), the slider (33) and the elongated hole (25).

3. The coolant circulation treatment device for wire EDM machining according to claim 2, characterized in that: The protective cover (4) is provided with a rack (41) and a gear (42). The rack (41) is fixed on the inner wall of the protective cover (4). The length of the rack (41) is set along the length direction of the elongated hole (25). The gear (42) meshes with the rack (41). One end of the first brush (24) passes through the elongated hole (25) and the slider (33) and is fixedly connected to the center of the gear (42). The first brush (24) is rotatably connected to the slider (33). The first brush (24) is in the shape of a roller.

4. The coolant circulation treatment device for wire EDM according to claim 1, characterized in that: The first filter screen (23) is inclined and the inclination direction is inclined downward in the direction away from the water permeable hole (21). The bearing box (2) is provided with a discharge port (26), which is located at the lowest end of the first filter screen (23).

5. The coolant circulation treatment device for wire EDM as described in claim 1, characterized in that: The top of the carrier box (2) is inclined, and the inclination direction is inclined downward along the water-permeable hole (21).

6. The coolant circulation treatment device for wire EDM machining according to claim 5, characterized in that: The top of the carrier box (2) is provided with an inverted eave (5), and a second brush (51) is slidably provided on the inverted eave (5). The second brush (51) slides along the length direction of the second filter screen (22).

7. The coolant circulation treatment device for wire EDM according to claim 6, characterized in that: The second brush (51) is provided with a slide (52) and a ball (53). The slide (52) is fixedly connected to the second brush (51), and the slide (52) is slidably connected to the rim (5). The ball (53) is rotatably disposed on the slide (52) and is located between the slide (52) and the rim (5). The ball (53) rolls against the outer wall of the rim (5).

8. The coolant circulation treatment device for wire EDM according to claim 1, characterized in that: The carrier box (2) is provided with a backflush pipe (6). One end of the backflush pipe (6) is used to communicate with the external coolant, and the other end extends into the carrier box (2) and is fixed with a nozzle (61). The nozzle (61) is set facing the bottom surface of the first filter screen (23).

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