Gantry type electric spark machine tool

Abstract

The invention discloses a gantry type electric spark machine tool, and particularly relates to the technical field of electric spark machining equipment, the equipment comprises a machine tool body, a gantry frame, a control seat, a spindle head and a tool electrode, the surface of the machine tool body is fixedly connected with a liquid storage tank, and the surface of the machine tool body is provided with a lifting mechanism used for providing an insulation environment for spark discharge; the surface of the lifting mechanism is provided with a discharging mechanism used for discharging metal particles, the surface of the liquid storage tank is provided with a filtering mechanism used for filtering working liquid, and the surface of the liquid storage tank is provided with an extracting mechanism used for extracting the working liquid. The portal frame and the control base are moved through the first guide rail and the second guide rail, so that the spindle head is located above the workpiece, the design of the machine tool is more compact, the stability during machining is improved, generated heat can be evenly diffused to the two sides in the machining process, and the situation that the machining precision is affected due to unilateral thermal expansion is avoided.

Description

Technical Field

[0001] This application relates to the field of electrical discharge machining equipment technology, and more specifically, to a gantry-type electrical discharge machine tool. Background Technology

[0002] An electrical discharge machine (EDM) is a processing device that removes materials through high-temperature corrosion caused by pulsed discharge between an electrode and a workpiece. The cantilever EDM machine is a common structural type of EDM machine tool, consisting of a bed, column, spindle head, worktable, and cantilever. Its core feature is the single-column cantilever design, with the electrode installed at the end of the cantilever. The cantilever can move the electrode vertically or horizontally to process the workpiece.

[0003] However, because the cantilever EDM machine has a suspended structure, the distance between the electrode at the end of the cantilever and the support is relatively far. During the processing, it is easily affected by factors such as electrode weight and vibration, which can cause the electrode to wobble dynamically. In addition, the heat during processing can cause the cantilever to deform to one side, which may result in lower machining accuracy of the electrode on the workpiece.

[0004] Therefore, a gantry-type EDM machine tool is proposed to address the above problems. Summary of the Invention

[0005] The purpose of this application is to provide a gantry-type electrical discharge machine tool.

[0006] The technical solution for a gantry-type EDM machine tool provided in this application is as follows:

[0007] A gantry-type electrical discharge machine tool includes a bed, a gantry frame, a control base, a spindle head, and a tool electrode. A liquid storage tank is fixedly connected to the surface of the bed. The surface of the bed is provided with a lifting mechanism for providing an insulating environment for spark discharge. The surface of the lifting mechanism is provided with a discharge mechanism for discharging metal particles. The surface of the liquid storage tank is provided with a filtration mechanism for filtering the working fluid. The surface of the liquid storage tank is provided with a extraction mechanism for extracting the working fluid.

[0008] Preferably, the surface of the bed is provided with a first guide rail, the surface of the first guide rail is slidably connected to a gantry frame, the surface of the gantry frame is provided with a second guide rail, the surface of the second guide rail is slidably connected to a control seat, the surface of the control seat is provided with a third guide rail, the surface of the third guide rail is slidably connected to a column, one end of the column is fixedly connected to a spindle head, and one end of the spindle head is provided with a tool electrode.

[0009] By adopting the above technical solution, under the control of the drive component, the spindle head moves up and down along the third guide rail via the column, so as to control the tool electrode to feed or return, so as to facilitate the processing of the workpiece.

[0010] Preferably, the lifting mechanism includes a fixed frame, a drive motor, a threaded rod, a fixed block, a slider, and a liquid tank. The fixed frame is fixedly connected to the surface of the bed, and the drive motor is fixedly connected to the inside of the bed. One end of the drive motor is fixedly connected to a threaded rod, and one end of the threaded rod is rotatably connected to the fixed frame.

[0011] Preferably, a fixing block is threadedly connected to the surface of the threaded rod, a slider is fixedly connected to the surface of the fixing frame, and a liquid tank is fixedly connected to the surface of the fixing block.

[0012] By adopting the above technical solution, when the threaded rod rotates, the fixed block can move on the threaded rod, so that the fixed block can drive the liquid tank to move up and down, so that it can cover the worktable through the liquid tank, so as to facilitate the subsequent processing of the workpiece.

[0013] Preferably, the discharge mechanism includes an overflow port, a liquid outlet plate, a first liquid pump, a first liquid pumping pipe, and a liquid outlet pipe. The surface of the liquid tank is provided with an overflow port, a liquid outlet plate is fixedly connected to one side of the liquid tank, a first liquid pump is provided inside the liquid tank, a first liquid pumping pipe is fixedly connected to the surface of the first liquid pump, the first liquid pumping pipe cooperates with the liquid tank, and a liquid outlet pipe is provided on the surface of the first liquid pump.

[0014] By adopting the above technical solution, when the working fluid inside the tank reaches the overflow port, the clean working fluid continuously injected from the nozzle will cause the liquid level in the tank to rise. The working fluid exceeding the overflow port (which may have some fine impurities and foam floating on the surface) will flow out naturally through the outlet plate. Furthermore, the metal particles eroded by electrolysis will be forcibly flushed away through the extremely small discharge gap. Because the density of the metal particles is greater than that of the working fluid, they will naturally settle to the bottom of the tank when the liquid flow becomes gentle. Activating the first suction pump through the first suction pipe will extract the settled particles for discharge through the outlet pipe.

[0015] Preferably, the filtration mechanism includes a fixed plate, a connecting groove, a spring groove, a spring, a locking pin, a connecting box, a filter plate, a locking pin groove, and a handle. Two sets of fixed plates are fixedly connected to the surface of the bed. A connecting groove is opened on the surface of the liquid storage tank. A spring groove is opened at one end of the connecting groove. A spring is provided on the inner wall of the spring groove. A locking pin is fixedly connected to one end of the spring. A connecting box is slidably connected to the inner wall of the connecting groove.

[0016] Preferably, a filter plate is fixedly connected to the surface of the connecting box, a locking groove is provided at one end of the connecting box, the locking pin cooperates with the locking groove, and a handle is fixedly connected to one side of the connecting box.

[0017] By adopting the above technical solution, when the connecting box is inserted into the connecting groove, the surface of the connecting box will press against the locking pin and the spring. When the connecting box is in the correct position, the spring will return to its original position and push the locking pin into the locking pin groove, so that the connecting box is locked onto the storage tank. When the overflow port and the outlet pipe discharge the used working fluid, this working fluid will fall onto the filter plate. The filter plate can filter out the metal particles in the working fluid. The filtered working fluid will continue to be discharged into the storage tank for recycling.

[0018] Preferably, the extraction mechanism includes a second liquid pump, a second liquid extraction pipe, a liquid delivery pipe, a universal pipe, and a nozzle. The second liquid pump is fixedly connected to one side of the liquid storage tank, and the second liquid extraction pipe is fixedly connected to the surface of the second liquid pump. The second liquid extraction pipe cooperates with the liquid storage tank.

[0019] Preferably, a liquid delivery pipe is fixedly connected to the top of the second liquid pump, and a universal joint is fixedly connected to one end of the liquid delivery pipe, with a nozzle provided at one end of the universal joint.

[0020] By adopting the above technical solution, the extracted working fluid is sent into the universal tube through the liquid delivery pipe so that it can be discharged through the nozzle.

[0021] Preferably, a workbench is fixedly connected to the top of the bed, and the surface of the workbench has multiple sets of T-slots.

[0022] By adopting the above technical solution, the head of the T-bolt is slid into one end of the T-slot, so that it is stuck in the lower part of the slot and can slide freely. Then, the workpiece is placed on the worktable, moved to a suitable position, and the T-bolt is screwed into the thread. Then, a shim and a pressure plate are put on the bolt, and the nut is tightened with a wrench. The pressure plate will press down on the workpiece, thereby firmly fixing the workpiece on the worktable.

[0023] The technical effects and advantages of this application are as follows:

[0024] Compared with existing technologies, this gantry EDM machine tool combines a gantry-type guide rail layout with a thermally symmetrical structural design. The gantry frame and control seat are moved by the first and second guide rails so that the spindle head is positioned above the workpiece. This makes the machine tool design more compact, improves the stability during processing, and allows the generated heat to be evenly diffused to both sides during processing, avoiding unilateral thermal expansion that could affect processing accuracy. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this application;

[0026] Figure 2 This is a schematic diagram of the extraction mechanism in this application;

[0027] Figure 3This is a schematic diagram of the mating structure between the bed and the first guide rail in this application;

[0028] Figure 4 This is a schematic diagram of the mating structure between the bed and the liquid storage tank in this application;

[0029] Figure 5 This is a structural schematic diagram of the lifting mechanism of this application;

[0030] Figure 6 This is a schematic diagram of the emission mechanism of this application;

[0031] Figure 7 This is a schematic diagram of the structure of the liquid tank and the liquid outlet plate in this application.

[0032] Figure 8 This is a schematic diagram of the filtration mechanism of this application;

[0033] Figure 9 For the purposes of this application Figure 8 An enlarged diagram of A in the diagram.

[0034] The attached figures are labeled as follows: 1. Bed; 2. First guide rail; 3. Gantry frame; 4. Second guide rail; 5. Control base; 6. Liquid storage tank; 7. Lifting mechanism; 701. Fixed frame; 702. Drive motor; 703. Threaded rod; 704. Fixed block; 705. Slider; 706. Liquid tank; 8. Discharge mechanism; 801. Overflow port; 802. Liquid outlet plate; 803. First liquid pump; 804. First liquid suction pipe; 805. Liquid outlet pipe; 9. Filtration mechanism; 901. Fixed frame. Plate; 902, Connecting groove; 903, Spring groove; 904, Spring; 905, Locking pin; 906, Connecting box; 907, Filter plate; 908, Locking pin groove; 909, Handle; 10, Workbench; 11, T-slot; 12, Third guide rail; 13, Column; 14, Spindle head; 15, Extraction mechanism; 1501, Second liquid pump; 1502, Second liquid pipe; 1503, Liquid delivery pipe; 1504, Universal tube; 1505, Nozzle; 16, Tool electrode. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] Example 1

[0037] like Figures 1 to 9The gantry-type EDM machine tool shown includes a bed 1, a gantry frame 3, a control base 5, a spindle head 14, and a tool electrode 16. A liquid storage tank 6 is fixedly connected to the surface of the bed 1 for storing working fluid. A lifting mechanism 7 is provided on the surface of the bed 1 to provide an insulating environment for spark discharge, which can control the lifting and lowering of the liquid tank 706 to fill the interior of the liquid tank 706 with working fluid, so as to provide an insulating environment for spark discharge. A discharge mechanism 8 is provided on the surface of the lifting mechanism 7 for discharging metal particles and discharging the working fluid in the liquid tank 706. A filtration mechanism 9 is provided on the surface of the liquid storage tank 6 for filtering the working fluid used in the liquid tank 706. An extraction mechanism 15 is provided on the surface of the liquid storage tank 6 for extracting the working fluid from the liquid storage tank 6 into the liquid tank 706.

[0038] In a preferred embodiment, the surface of the bed 1 is provided with a first guide rail 2, and a gantry 3 is slidably connected to the surface of the first guide rail 2, so that the gantry 3 can slide along the first guide rail 2. The surface of the gantry 3 is provided with a second guide rail 4, and a control seat 5 is slidably connected to the surface of the second guide rail 4, so that the control seat 5 can slide along the second guide rail 4. The surface of the control seat 5 is provided with a third guide rail 12, and a column 13 is slidably connected to the surface of the third guide rail 12, so that the column 13 can slide along the third guide rail 12. One end of the column 13 is fixedly connected to a spindle head 14, and one end of the spindle head 14 is provided with a tool electrode 16. Under the control of the drive assembly, the spindle head 14 moves up and down along the third guide rail 12 via the column 13, so as to control the tool electrode 16 to feed or return, so as to facilitate the processing of the workpiece.

[0039] In a preferred embodiment, the lifting mechanism 7 includes a fixed frame 701, a drive motor 702, a threaded rod 703, a fixed block 704, a slider 705, and a liquid tank 706. The fixed frame 701 is fixedly connected to the surface of the bed 1, and the drive motor 702 is fixedly connected to the inside of the bed 1. One end of the drive motor 702 is fixedly connected to the threaded rod 703, and one end of the threaded rod 703 is rotatably connected to the fixed frame 701. Starting the drive motor 702 can drive the threaded rod 703 to rotate.

[0040] In a preferred embodiment, a fixing block 704 is threadedly connected to the surface of the threaded rod 703, a slider 705 is fixedly connected to the surface of the fixing frame 701, and a liquid tank 706 is fixedly connected to the surface of the fixing block 704. When the threaded rod 703 rotates, the fixing block 704 can move on the threaded rod 703 so that the liquid tank 706 can move up and down through the fixing block 704, so that it can cover the worktable 10 through the liquid tank 706 for subsequent workpiece processing.

[0041] In a preferred embodiment, the discharge mechanism 8 includes an overflow port 801, a liquid outlet plate 802, a first liquid pump 803, a first liquid suction pipe 804, and a liquid outlet pipe 805. An overflow port 801 is provided on the surface of the liquid tank 706. A liquid outlet plate 802 is fixedly connected to one side of the liquid tank 706. The first liquid pump 803 is located inside the liquid tank 706. A first liquid suction pipe 804 is fixedly connected to the surface of the first liquid pump 803, and the first liquid suction pipe 804 cooperates with the liquid tank 706. A liquid outlet pipe 805 is provided on the surface of the first liquid pump 803. When the working fluid inside the liquid tank 706 reaches the overflow port… At position 801, the clean working fluid continuously injected from nozzle 1505 will cause the liquid level in liquid tank 706 to rise. The working fluid exceeding overflow port 801 (which may have some small impurities and foam floating on the surface) will flow out naturally through outlet plate 802, and the metal particles that have been electro-eroded will be forcibly flushed away through the tiny discharge gap. Since the density of the metal particles is greater than that of the working fluid, when the liquid flow becomes gentle, they will naturally settle to the bottom of liquid tank 706. The first pump 803 is started to extract the settled particles through the first pump pipe 804 so that they can be discharged through outlet pipe 805.

[0042] In a preferred embodiment, the filtration mechanism 9 includes a fixed plate 901, a connecting groove 902, a spring groove 903, a spring 904, a locking pin 905, a connecting box 906, a filter plate 907, a locking pin groove 908, and a handle 909. Two sets of fixed plates 901 are fixedly connected to the surface of the bed 1. The surface of the liquid storage tank 6 is provided with a connecting groove 902. One end of the connecting groove 902 is provided with a spring groove 903. The inner wall of the spring groove 903 is provided with a spring 904. One end of the spring 904 is fixedly connected with a locking pin 905. The inner wall of the connecting groove 902 is slidably connected with a connecting box 906, which can be inserted into the connecting groove 902.

[0043] In a preferred embodiment, a filter plate 907 is fixedly connected to the surface of the connecting box 906. A locking groove 908 is provided at one end of the connecting box 906, and a locking pin 905 cooperates with the locking groove 908. A handle 909 is fixedly connected to one side of the connecting box 906. When the connecting box 906 is inserted into the connecting groove 902, the surface of the connecting box 906 will press the locking pin 905 and the spring 904. When the connecting box 906 is in the correct position, the spring 904 resets and pushes the locking pin 905 into the locking groove 908, so that the connecting box 906 is locked on the storage tank 6. When the overflow port 801 and the outlet pipe 805 discharge the used working fluid, this working fluid is splashed onto the filter plate 907. The filter plate 907 can filter out the metal particles in the working fluid. The filtered working fluid continues to be discharged into the storage tank 6 for recycling.

[0044] In a preferred embodiment, the extraction mechanism 15 includes a second liquid pump 1501, a second liquid extraction pipe 1502, a liquid delivery pipe 1503, a universal pipe 1504, and a nozzle 1505. The second liquid pump 1501 is fixedly connected to one side of the liquid storage tank 6, and the second liquid extraction pipe 1502 is fixedly connected to the surface of the second liquid pump 1501. The second liquid extraction pipe 1502 cooperates with the liquid storage tank 6. When the second liquid pump 1501 is started, the working fluid in the liquid storage tank 6 can be extracted through the second liquid extraction pipe 1502.

[0045] In a preferred embodiment, a liquid delivery pipe 1503 is fixedly connected to the top of the second liquid pump 1501, and a universal tube 1504 is fixedly connected to one end of the liquid delivery pipe 1503. A nozzle 1505 is provided at one end of the universal tube 1504. The extracted working fluid is sent into the universal tube 1504 through the liquid delivery pipe 1503 so that it can be discharged through the nozzle 1505.

[0046] In a preferred embodiment, a worktable 10 is fixedly connected to the top of the bed 1. The surface of the worktable 10 has multiple sets of T-slots 11. The head of the T-bolt is slid into one end of the T-slot 11 and locked in the lower part of the slot, allowing it to slide freely. The workpiece is then placed on the worktable 10 and moved to a suitable position. The T-bolt is then screwed into the thread, and a shim and pressure plate are placed on the bolt. The nut is then tightened with a wrench, and the pressure plate will press down on the workpiece, thereby firmly fixing the workpiece to the surface of the worktable 10.

[0047] The working process of this application is as follows: The head of the T-bolt is slid into one end of the T-slot 11, allowing it to slide freely within the slot. The workpiece is then placed on the worktable 10 and moved to a suitable position. The T-bolt is then screwed into the thread, and a shim and pressure plate are placed on the bolt. The nut is tightened with a wrench, causing the pressure plate to press down on the workpiece, thus firmly fixing it to the worktable 10. The gantry 3 and control seat 5 are moved via the first guide rail 2 and the second guide rail 4, positioning the spindle head 14 above the workpiece. The process is then initiated. The drive motor 702 drives the threaded rod 703 to rotate, allowing the fixed block 704 to move on the threaded rod 703. This, in turn, moves the liquid tank 706 up and down, covering the workbench 10. The second pump 1501 is then activated, drawing working fluid from the storage tank 6 through the second pumping pipe 1502. The drawn working fluid is then sent through the delivery pipe 1503 into the universal joint 1504, where it is discharged through the nozzle 1505, filling the liquid tank 706 with working fluid. To provide an insulating environment for spark discharge, the spindle head 14, under the control of the drive assembly, moves up and down along the third guide rail 12 via the column 13. The tool electrode 16 is controlled for feeding or retraction to facilitate workpiece processing. As the clean working fluid continuously injected by the nozzle 1505, the liquid level in the tank 706 rises. The working fluid exceeding the overflow port 801 (which may have some fine impurities and foam floating on its surface) flows out naturally through the outlet plate 802. Furthermore, the metal particles eroded by electro-electrolysis are forcibly expelled from the extremely small discharge gap. As the density of the metal particles is greater than that of the working fluid, they will naturally settle to the bottom of the liquid tank 706 when the liquid flow becomes gentle. The first pump 803 is started to extract the settled particles through the first pumping pipe 804 so that they can be discharged through the outlet pipe 805 and sprinkled onto the filter plate 907. The filter plate 907 can filter out the metal particles in the working fluid. The filtered working fluid continues to be discharged into the storage tank 6 for recycling. The above is the working principle of this gantry EDM machine tool.

Claims

1. A gantry-type electrical discharge machine tool, comprising a bed (1), a gantry frame (3), a control base (5), a spindle head (14), and a tool electrode (16), wherein a liquid storage tank (6) is fixedly connected to the surface of the bed (1), characterized in that: The surface of the bed (1) is provided with a lifting mechanism (7) for providing an insulating environment for spark discharge, the surface of the lifting mechanism (7) is provided with a discharge mechanism (8) for discharging metal particles, the surface of the liquid storage tank (6) is provided with a filtration mechanism (9) for filtering the working fluid, and the surface of the liquid storage tank (6) is provided with a extraction mechanism (15) for extracting the working fluid.

2. The gantry-type EDM machine tool according to claim 1, characterized in that: The surface of the bed (1) is provided with a first guide rail (2), and a gantry frame (3) is slidably connected to the surface of the first guide rail (2). The surface of the gantry frame (3) is provided with a second guide rail (4), and a control seat (5) is slidably connected to the surface of the second guide rail (4). The surface of the control seat (5) is provided with a third guide rail (12), and a column (13) is slidably connected to the surface of the third guide rail (12). One end of the column (13) is fixedly connected to a spindle head (14), and one end of the spindle head (14) is provided with a tool electrode (16).

3. A gantry-type EDM machine tool according to claim 1, characterized in that: The lifting mechanism (7) includes a fixed frame (701), a drive motor (702), a threaded rod (703), a fixed block (704), a slider (705), and a liquid tank (706). The fixed frame (701) is fixedly connected to the surface of the bed (1), and the drive motor (702) is fixedly connected to the inside of the bed (1). One end of the drive motor (702) is fixedly connected to the threaded rod (703), and one end of the threaded rod (703) is rotatably connected to the fixed frame (701).

4. A gantry-type EDM machine tool according to claim 3, characterized in that: The threaded rod (703) has a fixed block (704) threadedly connected to its surface, the fixed bracket (701) has a slider (705) fixedly connected to its surface, and the fixed block (704) has a liquid tank (706) fixedly connected to its surface.

5. A gantry-type EDM machine tool according to claim 4, characterized in that: The discharge mechanism (8) includes an overflow port (801), a liquid outlet plate (802), a first liquid pump (803), a first liquid extraction pipe (804), and a liquid outlet pipe (805). An overflow port (801) is provided on the surface of the liquid tank (706). A liquid outlet plate (802) is fixedly connected to one side of the liquid tank (706). A first liquid pump (803) is provided inside the liquid tank (706). A first liquid extraction pipe (804) is fixedly connected to the surface of the first liquid pump (803). The first liquid extraction pipe (804) cooperates with the liquid tank (706). A liquid outlet pipe (805) is provided on the surface of the first liquid pump (803).

6. A gantry-type EDM machine tool according to claim 1, characterized in that: The filtration mechanism (9) includes a fixed plate (901), a connecting groove (902), a spring groove (903), a spring (904), a locking pin (905), a connecting box (906), a filter plate (907), a locking pin groove (908), and a handle (909). Two sets of fixed plates (901) are fixedly connected to the surface of the bed (1). The surface of the liquid storage tank (6) is provided with a connecting groove (902). A spring groove (903) is provided at one end of the connecting groove (902). A spring (904) is provided on the inner wall of the spring groove (903). A locking pin (905) is fixedly connected to one end of the spring (904). A connecting box (906) is slidably connected to the inner wall of the connecting groove (902).

7. A gantry-type EDM machine tool according to claim 6, characterized in that: A filter plate (907) is fixedly connected to the surface of the connecting box (906). A locking groove (908) is opened at one end of the connecting box (906). The locking pin (905) cooperates with the locking groove (908). A handle (909) is fixedly connected to one side of the connecting box (906).

8. A gantry-type EDM machine tool according to claim 1, characterized in that: The extraction mechanism (15) includes a second liquid pump (1501), a second liquid pipe (1502), a liquid delivery pipe (1503), a universal pipe (1504), and a nozzle (1505). The second liquid pump (1501) is fixedly connected to one side of the liquid storage tank (6). The second liquid pipe (1502) is fixedly connected to the surface of the second liquid pump (1501). The second liquid pipe (1502) cooperates with the liquid storage tank (6).

9. A gantry-type EDM machine tool according to claim 8, characterized in that: The top of the second liquid pump (1501) is fixedly connected to a liquid delivery pipe (1503), one end of which is fixedly connected to a universal tube (1504), and one end of the universal tube (1504) is provided with a nozzle (1505).

10. A gantry-type EDM machine tool according to claim 1, characterized in that: The top of the bed (1) is fixedly connected to a workbench (10), and the surface of the workbench (10) has multiple sets of T-slots (11).

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