An electrical discharge machining device capable of adjusting working fluid tank area

Abstract

This invention relates to the field of forming machine tool technology, specifically to an EDM (Electrical Discharge Machining) device capable of adjusting the working fluid tank area. The device includes a machine body and an electrode adjustment unit, and further includes: a working fluid tank comprising a first tank, a second tank, and a third tank arranged sequentially from the outside to the inside; the first tank is fixedly connected to the machine body; the second and third tanks are both capable of telescoping along the Z-axis; and a working fluid adding mechanism disposed at the bottom of a movable base and moving synchronously with the movable base. The working fluid tank of this invention is composed of nested first, second, and third tanks, with the inner cavity areas of the three tanks decreasing sequentially. Unused second and third tanks can be retracted into the first tank. Therefore, the tank area corresponding to the actual size of the workpiece can be dynamically selected, significantly improving the equipment's versatility while reducing the amount of working fluid and energy consumption during the processing of small-sized workpieces.

Description

Technical Field

[0001] This invention relates to the field of forming machine tool technology, specifically to an electrical discharge molding device that can adjust the area of ​​the working fluid tank. Background Technology

[0002] The core of the electrical discharge forming device is based on the principle of "pulse discharge erosion of materials". It is suitable for processing high-hardness and high-toughness materials (such as mold steel, high-temperature alloys, titanium alloys, etc.) and complex irregular structural parts that are difficult to process by traditional cutting.

[0003] The electrical discharge machining (EDM) apparatus mainly consists of a machine body, an electrode adjustment unit, a working fluid tank, and a working fluid circulation unit. The machine body provides stable foundation support for the entire apparatus. The electrode adjustment unit typically integrates X / Y / Z-axis translation mechanisms and a B-axis rotation mechanism, allowing adjustment of the electrode's spatial orientation to achieve EDM of complex contours. The working fluid tank, serving as the carrier of the machining area, contains the working fluid and completely immerses the workpiece and electrode, ensuring stable discharge operation in an insulated environment. The working fluid circulation unit usually consists of a high-pressure supply pump, multi-stage filters, and a magnetic separator, supplying the working fluid tank with specialized EDM kerosene or emulsion while filtering metal debris generated during discharge to prevent secondary discharges from scratching the workpiece surface.

[0004] However, existing EDM (Electrical Discharge Machining) devices generally use a fixed-area design for the working fluid tank, meaning the inner cavity's length and width are factory-preset fixed values ​​(common specifications such as 1000×800mm, 800×600mm, 300×200mm, etc.), which cannot be adjusted according to the actual size of the workpiece. If a small-volume tank is used to control costs, it cannot accommodate large-sized workpieces. If a large-volume working fluid tank is used to accommodate large-sized workpieces, sufficient working fluid still needs to be injected when processing small-sized workpieces to ensure discharge stability, increasing the working fluid consumption by 3-5 times compared to a small-volume tank. Simultaneously, the energy consumption for winter antifreeze heating and summer temperature control cooling of a large tank is 25%-30% higher than that of a small tank, and the circulating pump needs to operate under continuous high load, leading to increased filter replacement frequency and further increasing maintenance costs. Therefore, we propose an EDM device with an adjustable working fluid tank area to effectively solve the above-mentioned drawbacks. Summary of the Invention

[0005] The purpose of this invention is to provide an electrical discharge molding apparatus that can adjust the area of ​​the working fluid tank, thereby solving the problem mentioned in the background art that the working fluid tank in the prior art generally uses a fixed area.

[0006] This invention is achieved through the following technical solution: an electrical discharge molding device capable of adjusting the working fluid tank area, comprising a body and an electrode adjustment unit, wherein the electrode adjustment unit is mounted on the top of the body for adjusting the electrode orientation, and further comprising:

[0007] The working fluid tank is installed in the middle of the machine body and located directly below the electrode adjustment unit. The working fluid tank includes a first tank, a second tank, and a third tank arranged sequentially from the outside to the inside. The first tank is fixedly connected to the machine body, and the second and third tanks can extend and retract along the Z-axis.

[0008] A movable seat is located at the inner top of the first housing and extends along the Y-axis direction; the movable seat is capable of moving along the X-axis direction.

[0009] The working fluid adding mechanism is located at the bottom of the movable seat and moves synchronously with the movable seat. The inlet of the working fluid adding mechanism is connected to the outlet of the external working fluid circulation unit through a hose, and is used to add working fluid to the first tank, the second tank or the third tank.

[0010] The working fluid discharge mechanism is located at the bottom of the first housing. The inlet of the working fluid discharge mechanism is connected to the first housing, the second housing, and the third housing, respectively. The outlet of the working fluid discharge mechanism is connected to the return end of the external working fluid circulation unit through a pipeline.

[0011] Optionally, both the second and third boxes are composed of a rigid body with a rectangular ring structure and a corrugated expansion body, with the upper and lower ends of the corrugated expansion body connected to the rigid body and the inner bottom wall of the first box, respectively.

[0012] Electric telescopic rods corresponding to each rigid body are installed on the outer bottom of the first housing. The output end of each electric telescopic rod extends along the Z-axis and is fixed to the corresponding rigid body.

[0013] Optionally, a workbench is fixed to the inner bottom of the first box via a bracket, and the outer edge of the workbench does not exceed the inner edge of the third box.

[0014] Optionally, both ends of the movable seat are slidably connected to the inner wall of the first housing along the X-axis direction, and an X-axis linear module for driving the movable seat to move along the X-axis direction is installed in the first housing.

[0015] Optionally, the working fluid adding mechanism includes a first adding tube, a second adding tube, and a third adding tube suspended below the movable seat. The first adding tube, the second adding tube, and the third adding tube all extend along the Y-axis direction, and the first adding tube and the third adding tube can move along the X-axis direction and the Z-axis direction.

[0016] Optionally, when adding working fluid to the first tank, the first adding tube, the second adding tube, and the third adding tube are spaced apart along the Y-axis, and their axes are collinear;

[0017] When working fluid is added to the second tank, the first, second and third adding tubes are spaced apart along the Z-axis, and the first and third adding tubes partially overlap with the second adding tube in the Y-axis direction.

[0018] When adding working fluid to the third tank, the first, second, and third adding tubes are spaced apart along the Z-axis and completely overlap in the Y-axis direction.

[0019] Optionally, a first connecting rod is fixed on the first adding tube. The first connecting rod moves through the movable seat along the Z-axis direction. A first movable seat corresponding to the first connecting rod is provided on the movable seat. The first movable seat can move along the Y-axis direction. The first connecting rod is slidably connected to the first movable seat along the Z-axis direction.

[0020] A first slide rod is rotatably connected to the upper end of the first connecting rod on the side opposite to the first movable seat. A first slide groove adapted to the first slide rod is provided on the side wall of the movable seat. The first slide groove extends obliquely along the Y-axis direction.

[0021] Optionally, a second connecting rod is fixed on the third adding tube. The second connecting rod moves through the movable seat along the Z-axis direction. A second movable seat corresponding to the second connecting rod is provided on the movable seat. The second movable seat can move along the Y-axis direction. The second connecting rod is slidably connected to the second movable seat along the Z-axis direction.

[0022] A second slide rod is rotatably connected to the upper end of the second connecting rod on the side opposite to the second movable seat. A second slide groove adapted to the second slide rod is provided on the side wall of the movable seat. The second slide groove extends obliquely along the Y-axis direction.

[0023] Optionally, the first slide groove and the second slide groove are parallel, and the first slide groove and the second slide groove are spaced apart along the Y-axis direction.

[0024] Optionally, the movable base is equipped with a first Y-axis linear module for driving the first movable base to move along the Y-axis direction; the movable base is also equipped with a second Y-axis linear module for driving the second movable base to move along the Y-axis direction.

[0025] Compared with the prior art, the present invention provides an electrical discharge molding device that can adjust the area of ​​the working fluid tank, which has the following advantages:

[0026] 1. The working fluid tank of the present invention is composed of a first tank, a second tank and a third tank nested together. The inner cavity area of ​​the three tanks decreases sequentially, and the unused second tank and third tank can be shrunk into the first tank. Therefore, the tank with the corresponding area can be dynamically selected according to the actual size of the workpiece, which greatly improves the versatility of the equipment. At the same time, it reduces the amount of working fluid and energy consumption when processing small-sized workpieces, and significantly reduces the equipment investment and operating costs of enterprises.

[0027] 2. The working fluid addition mechanism of the present invention consists of a first addition tube, a second addition tube and a third addition tube. The spatial distribution of the three tubes can be dynamically adjusted according to the target box size, so as to provide efficient and high-precision fluid supply guarantee for the processing of workpieces of different sizes. Attached Figure Description

[0028] Figure 1 This is a front view of the present invention;

[0029] Figure 2 This is a cross-sectional view of the present invention;

[0030] Figure 3 This is a cross-sectional view of the working fluid tank of the present invention;

[0031] Figure 4 This is a schematic diagram of the first housing of the present invention;

[0032] Figure 5 This is a schematic diagram of the working fluid addition mechanism of the present invention;

[0033] Figure 6 This is a schematic diagram of the Y-axis linear module of the present invention;

[0034] Figure 7 A diagram showing the working mechanism of this invention located within the first housing is provided.

[0035] Figure 8 A diagram showing the working mechanism of this invention located within the second housing is provided.

[0036] Figure 9 A diagram showing the working mechanism of this invention located within the third housing.

[0037] In the diagram: 1. Main body; 2. Electrode adjustment unit; 3. Working fluid tank; 301. First housing; 302. Second housing; 303. Third housing; 4. Movable seat; 5. Working fluid adding mechanism; 501. First adding tube; 502. Second adding tube; 503. Third adding tube; 6. Working fluid discharging mechanism; 7. Worktable; 8. Support; 9. X-axis linear module; 10. First connecting rod; 11. First movable seat; 12. First slide rod; 13. Second connecting rod; 14. Second movable seat; 15. Second slide rod; 16. Second slide groove; 17. First slide groove; 18. First Y-axis linear module; 19. Second Y-axis linear module. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figures 1 to 9 An electrical discharge machining (EDM) device capable of adjusting the working fluid tank area includes a body 1 and an electrode adjustment unit 2. The body 1 provides a stable foundation support for the entire device. The electrode adjustment unit 2 is mounted on the top of the body 1 and is used to adjust the electrode's orientation. Specifically, the electrode adjustment unit 2 generally integrates an X / Y / Z-axis translation mechanism and a B-axis rotation mechanism, which can adjust the spatial orientation of the electrode to ensure that the electrode can conform to the workpiece's arc surface and groove structure, achieving EDM machining of complex contours. This is existing technology and will not be elaborated further here.

[0040] This embodiment also includes: a working fluid tank 3, a movable seat 4, a working fluid adding mechanism 5, and a working fluid discharging mechanism 6.

[0041] The working fluid tank 3 is installed in the middle of the machine body 1 and directly below the electrode adjustment unit 2. It is used to contain the working fluid and completely immerse the workpiece and electrode to ensure that the discharge process is stable in an insulated environment. Specifically, the working fluid tank 3 includes a first tank 301, a second tank 302, and a third tank 303 arranged sequentially from the outside to the inside (the first tank 301 is suitable for large workpieces of 1000×800mm, the second tank 302 is suitable for medium workpieces of 800×600mm, and the third tank 303 is suitable for small workpieces of 300×200mm). The first tank 301 is fixedly connected to the machine body 1. The second tank 302 and the third tank 303 can both extend and retract along the Z-axis direction, and can be raised and lowered or retracted for storage according to processing requirements.

[0042] In this embodiment, both the second housing 302 and the third housing 303 are composed of a rigid body with a rectangular ring structure and a corrugated telescopic body. The upper and lower ends of the corrugated telescopic body are connected to the rigid body and the inner bottom wall of the first housing 301, respectively. Electric telescopic rods corresponding to each rigid body are installed on the outer bottom of the first housing 301. The output end of each electric telescopic rod extends along the Z-axis and is fixed to the corresponding rigid body. When the electric telescopic rod receives a command from the CNC system, it drives the corresponding rigid body to rise and fall along the Z-axis, thereby realizing the extension and retraction of the second housing 302 or the third housing 303.

[0043] It should be added that a worktable 7 is fixed to the inner bottom of the first housing 301 via a bracket 8. The worktable 7 is used to fix the workpiece using a pressure plate clamp or a vacuum suction cup. The outer edge of the worktable 7 does not exceed the inner edge of the third housing 303, ensuring that the third housing 303 will not interfere with the worktable 7 when it is raised, lowered, or extended, thus ensuring the smoothness of the extension and retraction.

[0044] Using the above structure, when processing large workpieces using the first housing 301, first control the electric telescopic rods of the second housing 302 and the third housing 303 to retract, so that both housings are completely retracted into the first housing 301. Then, fix the large workpiece onto the worktable 7 using the pressure plate clamp, and start the equipment to perform EDM processing. When processing medium-sized workpieces using the second housing 302, first fix the medium-sized workpiece onto the worktable 7, then control the electric telescopic rod of the second housing 302 to extend, causing the second housing 302 to rise to the preset unfolded height, while the third housing 303 remains retracted. When processing small workpieces using the third housing 303, simply fix the small workpiece onto the worktable 7, then activate the electric telescopic rod of the third housing 303 to raise and unfold it.

[0045] By adopting this three-layer nested telescopic structure, the corresponding area of ​​the tank can be dynamically selected according to the actual size of the workpiece. There is no need to purchase multiple machines for workpieces of different specifications, which greatly improves the versatility of the equipment. At the same time, it reduces the amount of working fluid used when processing small workpieces (60%-70% less than traditional large tanks) and energy consumption, significantly reducing the equipment investment and operating costs of enterprises.

[0046] Secondly, the movable seat 4 is located at the inner top of the first housing 301 and extends along the Y-axis. The movable seat 4 can move along the X-axis. Specifically, both the front and rear ends of the movable seat 4 are slidably connected to the inner wall of the first housing 301 along the X-axis. An X-axis linear module 9 for driving the movable seat 4 to move along the X-axis is installed inside the first housing 301. This module consists of a servo motor, a drive wheel, a driven wheel, and a synchronous belt. The movable seat 4 is fixed to the synchronous belt through a connector. When the servo motor drives the drive wheel to rotate, the synchronous belt drives the movable seat 4 to reciprocate along the X-axis, thereby driving the working fluid adding mechanism 5 to align with the fluid supply area of ​​the first, second, or third housing, avoiding leakage or localized fluid shortage caused by fluid supply misalignment.

[0047] In addition, the working fluid addition mechanism 5 is located at the bottom of the movable base 4 and moves synchronously with the movable base 4. The inlet of the working fluid addition mechanism 5 is connected to the outlet of the external working fluid circulation unit via a hose, and is used to add working fluid to the first tank 301, the second tank 302, or the third tank 303. Specifically, the working fluid addition mechanism 5 includes a first addition pipe 501, a second addition pipe 502, and a third addition pipe 503 suspended below the movable base 4. The first addition pipe 501, the second addition pipe 502, and the third addition pipe 503 all extend along the Y-axis direction. Among them, the second addition pipe 502 is rigidly connected to the movable base 4 via a hanger rod; the first addition pipe 501 and the third addition pipe 503 can move along the X-axis and Z-axis directions, and can be adapted to the fluid supply position according to the tank size. All three are connected to the outlet of the external working fluid circulation unit via oil-resistant and high-pressure-resistant polyurethane hoses.

[0048] Finally, the working fluid discharge mechanism 6 is located at the bottom of the first housing 301. The inlet end of the working fluid discharge mechanism 6 is connected to the first housing 301, the second housing 302 and the third housing 303 respectively. The outlet of the working fluid discharge mechanism 6 is connected to the return end of the external working fluid circulation unit through a pipeline, which can realize "discharge on demand". In this embodiment, the working fluid discharge mechanism 6 includes a first discharge port, a second discharge port, and a third discharge port located at the bottom of the first housing 301. The first discharge port is located in the outer annular area at the bottom of the first housing 301 (corresponding to the discharge of waste fluid from the first housing 301), the second discharge port is located in the annular area between the first housing 301 and the second housing 302 (corresponding to the discharge of waste fluid from the second housing 302), and the third discharge port is located in the area at the bottom of the third housing 303 (corresponding to the discharge of waste fluid from the third housing 303). Each discharge port is connected in series with an electric shut-off valve and is connected to the return end of the external working fluid circulation unit through a pipeline. The discharge valve of the corresponding housing can be opened individually as needed. The waste fluid is reused after multi-stage filtration by the circulation unit, reducing consumable costs.

[0049] It is worth mentioning that, given the differences in the longitudinal (Y-axis) dimensions of the first box 301 (1000mm), the second box 302 (800mm), and the third box 302 (300mm), and the fact that the second box 302 and the third box 303 need to perform lifting and lowering movements (expanding / retracting) along the Z-axis, in order to both meet the space avoidance requirements during the lifting and lowering of the two boxes (avoiding collisions with the adding tubes) and avoid interference with the workpiece processing caused by the first, second, and third adding tubes (such as the tubes scraping against the workpiece or the side wall of the box), the spatial distribution of the first, second, and third adding tubes needs to be adjusted first, as follows:

[0050] When working fluid is added to the first tank 301, the first addition tube 501, the second addition tube 502, and the third addition tube 503 are spaced apart along the Y-axis, and their axes are collinear (e.g., Figure 7(As shown); Meanwhile, the three tubes are located in the upper middle part of the first box 301, which can completely cover the longitudinal range of the 1000×800mm large-size box, adapting to the processing needs of large-size workpieces. The working fluid can quickly fill the area around the workpiece, and the liquid surface covers the workpiece to a depth of 80-100mm, meeting the discharge stability requirements of large workpieces; and can avoid interference with large-size workpieces.

[0051] When working fluid is added to the second tank 302, the first adding tube 501, the second adding tube 502, and the third adding tube 503 are spaced apart along the Z-axis (vertical spacing 30mm), and the first adding tube 501 and the third adding tube 503 partially overlap with the second adding tube 502 in the Y-axis direction (e.g., Figure 8 (As shown in the diagram). At this time, the three tubes are located on the left side of the second housing 302 and within the annular space between the second housing 302 and the third housing 303. The partial overlap in the Y-axis direction allows the overall width of the three tubes to match the longitudinal dimensions of the 800×600mm medium-sized housing, ensuring effective coverage of the processing area of ​​the medium-sized workpiece. The moderate contraction in the Y-axis direction also prevents collisions with the sidewalls of the unfolded second housing 302, thus not affecting its lifting and lowering motion. Furthermore, the vertical spacing in the Z-axis direction allows the working fluid to be injected from different heights, forming a uniform flow field within the medium housing with liquid surface fluctuations ≤1mm. This ensures stable insulation of the discharge gap for the medium-sized workpiece, balancing processing efficiency and surface quality.

[0052] When adding working fluid to the third tank 303, the first adding tube 501, the second adding tube 502, and the third adding tube 503 are spaced apart along the Z-axis (vertical spacing 60mm), and the three completely overlap in the Y-axis direction (e.g., Figure 9 (As shown); at this time, the three tubes are located on the left side of the third housing 303; the complete overlap in the Y-axis direction compresses the overall width of the three tubes to ≤200mm, precisely matching the longitudinal dimensions of the 300×200mm small housing, avoiding obstruction of the lifting and lowering of the third housing 303 due to excessive tube width, and ensuring smooth expansion / contraction of the small housing; in addition, the expanded interval in the Z-axis direction allows the working fluid to be injected into the small housing from a greater height, forming a multi-directional convection flow field, which can quickly remove the fine debris generated during the processing of small workpieces, improving chip removal efficiency by 40%, avoiding secondary discharge scratching the workpiece surface, and ensuring the accuracy of the groove structure of small workpieces.

[0053] The following describes how the first adding tube 501 and the third adding tube 503 move along the X-axis and Z-axis directions:

[0054] A first connecting rod 10 is fixed to the first adding tube 501. The first connecting rod 10 moves through the movable seat 4 along the Z-axis. A first movable seat 11 corresponding to the first connecting rod 10 is provided on the movable seat 4. The first movable seat 11 can move along the Y-axis. The first connecting rod 10 is slidably connected to the first movable seat 11 along the Z-axis. A first sliding rod 12 is rotatably connected to the upper end of the first connecting rod 10 on the side facing away from the first movable seat 11. A first sliding groove 17 adapted to the first sliding rod 12 is opened on the side wall of the movable seat 4. The first sliding groove 17 extends obliquely along the Y-axis (the oblique trajectory is "when moving along the positive Y-axis, the sliding rod slides upward along the Z-axis"). When the first movable seat 11 moves along the Y-axis, the first slide rod 12 moves synchronously with the movable seat and is constrained by the inclined first slide groove 17. The movement of the slide rod is decomposed into translation along the Y-axis and lifting along the Z-axis. This composite movement is transmitted to the first adding tube 501 through the first connecting rod 10, so that the first adding tube 501 moves synchronously along the Y-axis and lifts along the Z-axis at the same time.

[0055] A second connecting rod 13 is fixed to the third adding tube 503. The second connecting rod 13 moves through the movable seat 4 along the Z-axis. A second movable seat 14 corresponding to the second connecting rod 13 is provided on the movable seat 4. The second movable seat 14 can move along the Y-axis. The second connecting rod 13 is slidably connected to the second movable seat 14 along the Z-axis. A second sliding rod 15 is rotatably connected to the upper end of the second connecting rod 13 on the side facing away from the second movable seat 14. A second sliding groove 16 adapted to the second sliding rod 15 is opened on the side wall of the movable seat 4. The second sliding groove 16 extends obliquely along the Y-axis. When the second movable seat 14 moves along the Y-axis, the cooperation of the second sliding rod 15 and the second sliding groove 16 drives the second connecting rod 13 and the third adding tube 503 to move synchronously in the Y-axis direction and rise and fall in the Z-axis direction. The operating principle is completely the same as that of the first adding tube 501.

[0056] It should be added that the first slide 17 and the second slide 16 are parallel (ensuring the symmetrical movement trajectories of the two adding tubes), and the first slide 17 and the second slide 16 are spaced apart along the Y-axis. Therefore, when the first movable seat 11 and the second movable seat 14 approach each other along the Y-axis, the first adding tube 501 will move above the second adding tube 502, and the third adding tube 503 will move below the second adding tube 502, ultimately making the three tubes evenly spaced along the Z-axis, perfectly adapting to the liquid supply needs of medium and small-sized tanks.

[0057] In this embodiment, a first Y-axis linear module 18 for driving the first movable seat 11 to move along the Y-axis direction is installed on the movable seat 4. A second Y-axis linear module 19 for driving the second movable seat 14 to move along the Y-axis direction is also installed on the movable seat 4.

[0058] The first Y-axis linear module 18 includes a lead screw and a guide rod. The lead screw extends along the Y-axis and is rotatably connected to the movable seat 4. The first movable seat 11 is connected to the lead screw via a threaded pair. The guide rod is fixed to the movable seat 4 and moves through the first movable seat 11 along the Y-axis to ensure that the movable seat moves without swaying. Gears are sleeved and fixed at both ends of the lead screw. A rack (length adapted to the X-axis stroke of the movable seat 4) is fixed on the inner wall of the first housing 301 and meshes with each gear. When the movable seat 4 moves along the X-axis, the gears translate synchronously with the movable seat 4 and roll along the rack, thereby driving the lead screw to rotate and ultimately driving the first movable seat 11 to move along the Y-axis.

[0059] The overall structure of the second Y-axis linear module 19 is completely identical to that of the first Y-axis linear module 18, the only difference being that the helical direction of the lead screw is opposite (the first module has a right-hand thread, and the second module has a left-hand thread). Therefore, when the movable seat 4 moves along the X-axis, the first movable seat 11 and the second movable seat 14 will move in opposite directions (approaching each other) or away from each other (moving away from each other) along the Y-axis, realizing the automatic adjustment of the spatial distribution of the three tubes.

[0060] With the above structure, when the working fluid adding mechanism 5 moves along the X-axis with the moving seat 4 to the preset position (corresponding to the fluid supply area of ​​the first, second or third box), the spatial distribution adjustment of the first, second and third adding tubes can be automatically completed through the meshing transmission of gears and racks without the need for additional drive commands. This simplifies the control logic and ensures the precise matching of the adding tube with the target box, effectively avoiding interference between the tube and the box and the workpiece, and improving the automation and reliability of the equipment operation.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrical discharge machining (EDM) device capable of adjusting the working fluid tank area, comprising a body and an electrode adjustment unit, wherein the electrode adjustment unit is mounted on the top of the body and is used to adjust the electrode orientation, characterized in that, Also includes: The working fluid tank is installed in the middle of the machine body and located directly below the electrode adjustment unit. The working fluid tank includes a first tank, a second tank, and a third tank arranged sequentially from the outside to the inside. The first tank is fixedly connected to the machine body, and the second and third tanks can extend and retract along the Z-axis. A movable seat is located at the inner top of the first housing and extends along the Y-axis direction; the movable seat is capable of moving along the X-axis direction. The working fluid adding mechanism is located at the bottom of the movable seat and moves synchronously with the movable seat. The inlet of the working fluid adding mechanism is connected to the outlet of the external working fluid circulation unit through a hose, and is used to add working fluid to the first tank, the second tank or the third tank. The working fluid discharge mechanism is located at the bottom of the first housing. The inlet of the working fluid discharge mechanism is connected to the first housing, the second housing, and the third housing respectively. The outlet of the working fluid discharge mechanism is connected to the return end of the external working fluid circulation unit through a pipeline.

2. The EDM (Electrical Discharge Machining) device for adjusting the working fluid tank area according to claim 1, characterized in that: Both the second and third boxes are composed of a rigid body with a rectangular ring structure and a corrugated expansion body. The upper and lower ends of the corrugated expansion body are connected to the rigid body and the inner bottom wall of the first box, respectively. Electric telescopic rods corresponding to each rigid body are installed on the outer bottom of the first housing. The output end of each electric telescopic rod extends along the Z-axis and is fixed to the corresponding rigid body.

3. An EDM (Electrical Discharge Machining) apparatus capable of adjusting the working fluid tank area according to any one of claims 1 to 2, characterized in that: A workbench is fixed to the inner bottom of the first box by a bracket, and the outer edge of the workbench does not exceed the inner edge of the third box.

4. The EDM (Electrical Discharge Machining) device for adjusting the working fluid tank area according to claim 1, characterized in that: Both ends of the movable base are slidably connected to the inner wall of the first housing along the X-axis direction, and an X-axis linear module for driving the movable base to move along the X-axis direction is installed in the first housing.

5. The EDM (Electrical Discharge Machining) device for adjusting the working fluid tank area according to claim 1, characterized in that: The working fluid addition mechanism includes a first addition tube, a second addition tube, and a third addition tube suspended below the movable seat. The first addition tube, the second addition tube, and the third addition tube all extend along the Y-axis direction, and the first addition tube and the third addition tube can move along the X-axis direction and the Z-axis direction.

6. The EDM (Electrical Discharge Machining) device for adjusting the working fluid tank area according to claim 5, characterized in that: When working fluid is added to the first tank, the first, second, and third adding tubes are spaced apart along the Y-axis, and their axes are collinear. When working fluid is added to the second tank, the first, second and third adding tubes are spaced apart along the Z-axis, and the first and third adding tubes partially overlap with the second adding tube in the Y-axis direction. When adding working fluid to the third tank, the first, second, and third adding tubes are spaced apart along the Z-axis and completely overlap in the Y-axis direction.

7. The EDM (Electrical Discharge Machining) device for adjusting the working fluid tank area according to claim 6, characterized in that: A first connecting rod is fixed on the first adding tube. The first connecting rod moves through the movable seat along the Z-axis direction. A first movable seat corresponding to the first connecting rod is provided on the movable seat. The first movable seat can move along the Y-axis direction. The first connecting rod is slidably connected to the first movable seat along the Z-axis direction. A first slide rod is rotatably connected to the upper end of the first connecting rod on the side opposite to the first movable seat. A first slide groove adapted to the first slide rod is provided on the side wall of the movable seat. The first slide groove extends obliquely along the Y-axis direction.

8. The EDM (Electrical Discharge Machining) device for adjusting the working fluid tank area according to claim 7, characterized in that: The third adding tube is fixed with a second connecting rod, which moves through the movable seat along the Z-axis. A second movable seat corresponding to the second connecting rod is provided on the movable seat. The second movable seat can move along the Y-axis. The second connecting rod is slidably connected to the second movable seat along the Z-axis. A second slide rod is rotatably connected to the upper end of the second connecting rod on the side opposite to the second movable seat. A second slide groove adapted to the second slide rod is provided on the side wall of the movable seat. The second slide groove extends obliquely along the Y-axis direction.

9. The electrical discharge molding apparatus for adjusting the working fluid tank area according to claim 8, characterized in that: The first slide groove is parallel to the second slide groove, and the first slide groove and the second slide groove are spaced apart along the Y-axis.

10. The EDM (Electrical Discharge Machining) device for adjusting the working fluid tank area according to claim 8, characterized in that: The movable base is equipped with a first Y-axis linear module for driving the first movable base to move along the Y-axis direction; a second Y-axis linear module for driving the second movable base to move along the Y-axis direction is also installed on the movable base.

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