Electric discharge machining equipment

Abstract

The invention discloses electric discharge machining equipment. The device comprises a discharging machine, a lifting oil groove and a tool magazine platform, the discharging machine is fixed to a rack on the top of the device, the tool magazine platform is fixed to the side of the discharging machine, the bottom of the discharging machine right faces a workbench in the middle of the lifting oil groove, and the discharging machine comprises a displacement module and a discharging assembly which can achieve automatic control; the displacement module can drive the discharging assembly to do linear displacement along the X axis, the Y axis and the Z axis, the bottom of the main shaft is sequentially connected with an insulation structure and a rotating shaft structure capable of driving an electrode to rotate, the rotating shaft structure is connected with a chuck used for clamping an electrode base, and the electrode is vertically downward and directly faces a workbench of the lifting oil groove. An electrode displacement path of the tool magazine platform corresponds to a chuck of the discharge machine, and the lifting oil groove comprises an oil drainage structure. According to the scheme, a multi-axis multi-angle adjusting system is formed, manual intervention is not needed, the machining efficiency and the machining precision are effectively improved, and the multi-direction and multi-angle machining requirements of complex workpieces can be met.

Description

A power electrical discharge machining equipment Technical Field

[0001] This solution relates to the field of electrical discharge machining equipment technology, and in particular to an electrical discharge machining equipment. Background Technology

[0002] Electrical discharge machining (EDM) is a precision device that uses the high temperature generated by pulsed discharge between electrodes and the workpiece to etch away conductive materials such as metals. Its core principle is to melt or vaporize materials through non-contact discharge. Because the processing is not limited by the hardness of the workpiece and can maintain extremely high machining accuracy, it is widely used in high-end manufacturing fields such as mold making, precision mechanical parts machining, and complex cavity machining. In actual production, as the manufacturing industry's requirements for part complexity, machining accuracy, and production efficiency continue to increase, the multi-axis coordination capability, automation level, and auxiliary function stability of EDM machines have become key factors restricting their application.

[0003] Among existing electrical discharge machining (EDM) equipment technologies, Chinese invention patent application CN110773827A discloses a lifting oil tank and an EDM machine for EDM. The machine includes a base, a worktable at the front end of the base, and a lifting oil tank arranged around the worktable. The lifting oil tank has a clearance corresponding to the worktable. The lifting oil tank is mounted on a lifting mechanism that can move the oil tank up and down. The lifting oil tank includes a jacket with an oil inlet. An overflow inlet is located on the inner side of the lifting oil tank. EDM oil enters the jacket through the oil inlet and overflows into the lifting oil tank through the overflow inlet. An overflow outlet is also located on the inner side of the lifting oil tank. As the lifting oil tank descends, the worktable rises within the lifting oil tank, discharging the EDM oil through the overflow outlet. An oil tank is located at the rear of the base and connected to an oil pump. The oil tank is connected to the oil inlet and the overflow outlet via a pipe. It still has significant shortcomings, specifically as follows: The reference document cannot adjust the rotation angle of the electrode or workpiece, making it difficult to meet the multi-angle machining requirements of complex workpieces (such as circumferential surfaces, multiple sides, inclined cavities, etc.), limiting the machining range and failing to adapt to the machining requirements of complex parts in high-end manufacturing; it lacks a tool magazine platform and corresponding electrode storage and switching mechanism, requiring manual replacement of different electrode models to adapt to different machining processes during machining, which not only increases the cost of manual intervention but also leads to machining interruptions, seriously affecting production efficiency; at the same time, its oil management only achieves synchronization of lifting and liquid level, without forming a coordinated control with multi-axis machining and electrode switching, and the overall automated closed loop of the equipment has not been established, failing to meet the needs of continuous machining in mass production.

[0004] Therefore, there is a need for an electrical discharge machining (EDM) device that can process workpieces from multiple angles through automated control. Summary of the Invention

[0005] This solution provides an electrical discharge machining (EDM) device to address the aforementioned problems.

[0006] To achieve the above objectives, the technical solution adopted in this solution is as follows: an electrical discharge machining (EDM) device, including an EDM machine, a lifting oil tank, and a tool magazine platform. The EDM machine is fixed to the top frame of the device, with the tool magazine platform fixed to its side and the bottom facing the worktable in the middle of the lifting oil tank. The EDM machine includes a displacement module and an EDM assembly that can be automatically controlled. The spindle of the EDM assembly is slidably connected to the displacement module. The displacement module can drive the EDM assembly to make linear displacement along the X-axis, Y-axis, and Z-axis. An insulating structure and a rotating shaft structure that can drive the electrode to rotate are connected sequentially at the bottom of the spindle. The rotating shaft structure is connected to a chuck for holding the electrode holder, with the electrode vertically facing down and directly facing the worktable of the lifting oil tank. The electrode displacement path of the tool magazine platform corresponds to the chuck of the EDM machine and can realize automatic electrode switching. The lifting oil tank includes an oil draining structure and can realize automatic lifting to adapt to processing requirements.

[0007] Furthermore, the displacement module includes a first displacement component, a second displacement component, and a third displacement component. The first displacement component is fixed to the top of the frame. The second displacement component is connected to the first displacement component through a sliding connector, and the first displacement component can drive the sliding connector and the second displacement component to move along the X-axis. The second displacement component can drive the third displacement component to move along the Y-axis. The guide rail frame of the third displacement component is fixed on the second displacement component, and a third linear guide rail is provided on the guide rail frame. The spindle seat is slidably connected to the third linear guide rail through a slider, and the driving component of the third displacement component can drive the spindle seat to slide along the third linear guide rail to achieve Z-axis displacement.

[0008] Furthermore, an insulating structure and a rotating shaft structure capable of driving the electrode to rotate are sequentially connected to the bottom of the main shaft, and the rotating shaft structure is connected to the chuck.

[0009] Furthermore, the tool magazine platform is equipped with a rotary drive structure that can drive the limit seats to rotate to switch the electrodes to be used. The rotary drive structure includes a rotary power source, the power end of which is connected to a rotary shaft through a speed change structure. A connecting plate is fixed on the outside of the rotary shaft, and a limit plate is sleeved under the connecting plate. Limit seats are evenly distributed on the outer periphery of the limit plate. A limit groove is provided on one side of the limit seat, and a limit structure for cooperating with the electrode seat is provided in the limit groove.

[0010] Furthermore, the tool magazine platform is provided with a sliding structure, which includes a fourth power source, a fixed frame, and a fourth slider. The fourth power source is connected to the tool magazine through the fixed frame, and the fourth slider is connected to the back of the fixed frame and is slidably connected to the fourth linear guide rail on the top of the support frame.

[0011] Furthermore, the top of the support frame is provided with a top cover, which includes a fixed part and a rotating part. The fixed part has a clearance opening on the side facing the discharge machine that corresponds to the sensor detection end and the tool displacement path. The fixed part has an opening on one side, and the rotating part matches the opening of the fixed part and is rotatably connected by a movable part.

[0012] Furthermore, the lifting oil tank also includes a drive assembly for lifting the moving platform. The drive assembly includes a sixth power source and a reduction gear. The sixth power source and the reduction gear are connected and installed together on the assembly frame. The output end of the reduction gear is fixed to the drive wheel. A synchronous belt is sleeved on the drive wheel and the driven wheel, and the driven wheel is fixedly connected to the lifting screw. The moving platform is threadedly engaged with the lifting screw through a nut seat.

[0013] Furthermore, the lifting oil tank also includes a guiding mechanism, which includes sliders and damping lifting rods fixed to both sides of the moving platform. The sliders cooperate with the slide rails that are vertically fixed on the bracket, and the bottom of the damping lifting rods is fixed inside the oil tank.

[0014] Furthermore, the oil unloading structure includes upper and lower oil level detection elements for detecting oil level, a driving component, and a sealing component. The driving component can drive the sealing component to open and close the oil unloading port. The driving component is fixed to the outer wall of the oil tank body by a bracket, and the power end of the driving component is connected to the bracket. The sealing component is fixed to the bottom of the bracket. A sensing probe for detecting the state of its power end is provided on the outside of the driving component. The bottom of the oil tank body is connected to the lower oil tank through the oil unloading port to form a direct-down oil drain channel.

[0015] Furthermore, the top of the worktable is provided with an indexing plate that can drive the workpiece to rotate and index.

[0016] In summary, this solution has the following advantages: This solution achieves linear displacement of the X, Y, and Z axes through the displacement module, and, together with the C-axis assembly 125° rotation adjustment and the indexing plate driving the workpiece rotation, forms a multi-axis, multi-angle adjustment system. Moreover, the displacement of each axis is automatically controlled through the collaboration of the power source and the control system, without the need for manual intervention, which effectively improves processing efficiency and processing accuracy, and can meet the processing needs of complex workpieces in multiple directions and angles.

[0017] The tool magazine platform provided in this solution uses a fourth power source to drive a precise alignment chuck. The rotating power source drives the limit seat to rotate, enabling the switching of multiple electrode models. The limit opening and limit ball in the limit seat ensure the stability of the electrode. Combined with the top cover protection structure, it not only meets the need for rapid switching between different electrodes during continuous machining, but also avoids damage to the tool magazine components by machining contaminants.

[0018] The lifting oil tank provided in this solution achieves automated lifting through a drive component. The oil unloading structure uses dual oil level sensors to monitor the oil level and works with a fifth power source to achieve automated oil unloading. The sensing probe monitors the oil unloading operation status in real time to ensure stable oil level and reliable oil unloading. At the same time, the overflow port achieves continuous chip removal and heat dissipation, and the damping lifting rod and slider work together to ensure smooth lifting of the oil tank, thus ensuring the stability of the processing process in all aspects. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the present invention; Figure 2 is a schematic diagram of the discharge machine and the lifting oil tank; Figure 3 is an exploded view of the first displacement assembly; Figure 4 is an exploded view of the second displacement assembly; Figure 5 is an exploded view of the sliding connector; Figure 6 is an exploded view of the third displacement assembly; Figure 7 is a schematic diagram of the tool magazine platform; Figure 8 is an exploded view of the tool magazine platform; Figure 9 is a schematic diagram of the tool magazine platform with the top cover removed; Figure 10 is a schematic diagram of the top cover; Figure 11 is a schematic diagram of the tool magazine; Figure 12 is a schematic diagram of the electrical limit switch on the limiting seat; Figure 13 is the limiting seat. Figure 14 is a schematic diagram of the lifting oil tank; Figure 15 is a diagram showing the positional relationship between the drive assembly and the lifting oil tank; Figure 16 is an exploded view of the guide mechanism; Figure 17 is a schematic diagram of the drive assembly; Figure 18 is a schematic diagram of the drive assembly from another perspective; Figure 19 is an exploded view of the drive assembly; Figure 20 is an exploded view of the oil tank; Figure 21 is a bottom view of the oil tank; Figure 22 is an exploded view of the oil unloading structure; where: 010, electrode; 011, motor base; 100, discharge machine; 110, displacement module; 111, first position. 1111, First linear guide; 1112, First ball screw; 1113, First power source; 1114, First nut seat; 1115, Moving housing; 112, Second displacement assembly; 1121, Second linear guide; 1122, Second ball screw; 1123, Second power source; 1124, Second nut seat; 113, Third displacement assembly; 1131, Guide rail frame; 1132, Connector; 1133, Third linear guide; 1134, Third ball screw; 1 135. Third power source; 1136. Third slider; 114. Sliding connector; 1141. First slider; 1142. Second slider; 120. Discharge assembly; 121. Main spindle; 123. Fixing plate; 124. Insulating sheet; 125. C-axis assembly; 1251. Chuck; 200. Lifting oil tank; 210. Oil tank body; 211. Oil inlet valve mounting hole; 213. Support column mounting base; 214. Overflow port; 220. Support column; 230. Worktable; 240. Moving table; 250. Sealing ring; 260. Drive assembly; 261. Sixth power source; 262. Reduction gear; 263. Assembly frame; 264. Drive pulley; 265. Synchronous belt; 266. Driven pulley; 267. Lifting screw; 268. Nut seat; 270. Guide mechanism; 271. Damping lifting rod; 272. Slider; 273. Slide rail; 280. Indexing plate; 300. Oil unloading structure; 310. Upper oil level sensor; 320. Lower oil level sensor Sensor; 330, Fifth power source; 340, Sealing gasket; 350, First bracket; 360, Sensing probe; 400, Tool magazine platform; 410, Support frame; 420, Fourth linear guide rail; 430, Fourth power source; 440, Fixing frame; 450, Tool magazine; 451, Rotary power source; 452, Gearbox; 453, Rotary shaft; 454, Connecting plate; 455, Limiting plate; 456, End cover; 457, Limiting seat; 4571, Limiting groove;4572, Limiting opening; 4573, Limiting ball; 460, Fourth slider; 470, Top cover; 471, Fixing part; 4711, Connecting hole; 4712, Clearance opening; 4713, Opening; 472, Rotating part; 473, Moving part; 480, Placement platform; 481, Anti-slip rubber pad; 490, Sensor; 500, Frame; 510, Second bracket; 520, Oil tank. Detailed Implementation

[0020] The following description of the solution is based on the accompanying drawings and embodiments: Embodiment 1: An electrical discharge machining device, as shown in the figure, includes an electrical discharge machine 100, a lifting oil tank 200, an oil unloading structure 300, and a tool magazine platform 400.

[0021] The discharge machine 100 is fixed on the frame 500 at the top of the discharge processing equipment, and the tool magazine platform 400 is fixed to the side, and the worktable 230 is directly opposite the lifting oil tank 200 at the bottom.

[0022] The discharge machine 100 includes a displacement module 110 and a discharge assembly 120. The main shaft 121 of the discharge assembly 120 is slidably connected to the displacement module 110. Driven by the displacement module 110, the discharge assembly 120 can make linear displacement along the X-axis, Y-axis and Z-axis, thereby realizing multi-directional processing of the workpiece.

[0023] The displacement module 110 includes a first displacement component 111, a second displacement component 112, and a third displacement component 113, which work together to achieve multi-axis displacement adjustment.

[0024] The first displacement component 111 and the second displacement component 112 are connected by a sliding connector 114. The first displacement component 111 is fixed to the top of the frame 500 and includes symmetrically arranged first linear guide rails 1111. The first ball screw 1112 is connected to the power end of the first power source 1113 and is arranged in parallel between the two first linear guide rails 1111. Under the control of the first power source 1113, the first nut seat 1114 on the first ball screw 1112 can be moved along the X-axis, and the first nut seat 1114 is fixed to the bottom of the sliding connector 114.

[0025] The second displacement component 112 is fixed to the top of the sliding connector 114 and includes symmetrically arranged second linear guide rails 1121. The second ball screw 1122 is connected to the power end of the second power source 1123 and is arranged in parallel between the two second linear guide rails 1121. Under the control of the second power source 1123, the second nut seat 1124 on the second ball screw 1122 can be moved along the Y-axis, and the second nut seat 1124 is fixed to the top of the sliding connector 114. The bottom of the second linear guide rail 1121 is fixed to the frame 500.

[0026] The sliding connector 114 is provided with a first slider 1141 and a second slider 1142 at the top and bottom, respectively. The first slider 1141 slides on the linear guide rail of the first displacement component 111, and the second slider 1142 is located below the second displacement component 112 and connected to the second linear guide rail 1121. During operation, the second linear guide rail 1121 can make linear displacement relative to the second slider 1142. Through the coordinated action of the first displacement component 111 and the second displacement component 112, the precise displacement adjustment of the sliding connector 114 along the X-axis and Y-axis can be achieved.

[0027] The guide rail frame 1131 of the third displacement component 113 is fixed to the movable shell 1115 of the second displacement component 112 by the connector 1132. A third linear guide rail 1133 is fixed on the guide rail frame 1131. A third ball screw 1134 is connected to the power end of the third power source 1135 and is arranged parallel to the third linear guide rail 1133. The main shaft 121 is slidably connected to the third linear guide rail 1133 by the third slider 1136. The third power source 1135 can drive the main shaft 121 to slide along the third linear guide rail 1133.

[0028] A fixing plate 123 is provided at the bottom of the main spindle 121. An insulating sheet 124 is attached to the bottom of the fixing plate 123. The C-axis assembly 125 is connected to the bottom of the insulating sheet 124 via a flange. The output end of the C-axis assembly 125 is connected to a chuck 1251. The chuck 1251 is used to hold the electrode holder. The processing end of the discharge machine 100 is held by the chuck 1251 with the electrode vertically facing down and directly facing the worktable 230 of the lifting oil tank 200.

[0029] In this embodiment, the C-axis assembly 125 and the chuck 1251 are existing technologies. The C-axis assembly 125 is model KC-3C, and the chuck 1251 is model 3A-100039.

[0030] The tool magazine platform 400 is fixed to the side of the chuck 1251, and its electrode displacement path corresponds to the chuck 1251 of the discharge machine 100 to ensure smooth electrode switching.

[0031] The tool magazine platform 400 includes a support frame 410, on the top of which a fourth linear guide rail 420 is fixed. A fourth power source 430 is connected to the tool magazine 450 via a fixing frame 440. The tool magazine 450 can slide along the fourth linear guide rail 420 under the drive of the fourth power source 430, thereby achieving precise alignment between the tool magazine 450 and the chuck 1251 and ensuring the reliability of electrode switching.

[0032] Furthermore, the tool magazine 450 is fixed to the front of the fixing frame 440, and the fourth slider 460 is connected to the back. The fourth slider 460 is slidably connected to the fourth linear guide rail 420. Through the cooperation between the slider and the guide rail, the sliding of the tool magazine 450 is more stable and the displacement is more precise.

[0033] The tool magazine 450 includes a rotary power source 451. The fixed end of the rotary power source 451 is limited on the fixed frame 440. Its power end is connected to the rotary shaft 453 through the gearbox 452. A connecting plate 454 is fixed on the outer side of the shaft of the rotary shaft 453. A limiting plate 457 and an end cover 456 are sequentially sleeved under the connecting plate 454. A plurality of limiting electrode limiting seats are evenly distributed on the outer periphery of the limiting plate 457.

[0034] A limiting groove 4571 is provided on one side of the limiting seat. A limiting opening 4572 and a limiting ball 4573 are symmetrically provided in the limiting groove 4571. The two are used to cooperate with the electrode seat to prevent the tool from shaking or falling off during rotation, and to always keep the electrode in a vertical state to ensure the accuracy of subsequent processing.

[0035] The electrode holder is a standard model, with different models of electrodes fixed at the bottom. By selecting and rotating the electrode to be used to the discharge end, multiple electrode models can be quickly switched.

[0036] In this embodiment, the fourth power source 430 is a linear cylinder and the rotary power source 451 is an electric motor. Both are common power structures in the art and will not be described in detail here.

[0037] The connecting plate 454 limits the rotation shaft 453 and is rigidly connected to the fixing frame 440 to maintain the stability of the tool magazine 450 rotation and avoid displacement during rotation that would affect the electrode alignment accuracy.

[0038] During operation, the rotary power source 451 drives the rotary shaft 453 to rotate through the gearbox 452. Under the linkage of the rotary shaft 453, the limiting plate 457 drives the electrode on the limiting seat to rotate, rotating the electrode to be used to the discharge end, thus meeting the needs of continuous processing for different electrodes.

[0039] The discharge end faces the discharge motor 100. The top of the support frame 410 is provided with a top cover 470. The top cover 470 is fixed on the support frame 410 and covers the tool magazine 450, which can effectively prevent oil mist and debris generated during the processing from entering the tool magazine 450 and protect the internal components of the tool magazine 450.

[0040] The top cover 470 includes a fixing part 471 and a rotating part 472. The fixing part 471 has a connecting hole 4711 at its top, which corresponds to the top of the support frame 410 and is fixed to the support frame 410. The fixing part 471 has a clearance opening 4712 on the side facing the discharge machine 100. The position of the clearance opening 4712 corresponds to the detection end of 490 and the displacement path of the tool, so as to avoid blocking the detection signal of the sensor 490, ensure that the sensor 490 can accurately detect the electrode state, and at the same time provide sufficient space for the movement of the tool to avoid interference.

[0041] An opening 4713 is provided on one side of the fixed part 471. The rotating part 472 matches the opening 4713 of the fixed part 471. Its top is rotatably connected to the fixed part 471 through a movable part 473. When maintenance or observation is required, the rotating part 472 can be flipped over. The operation is convenient and does not require disassembly of the overall structure, which greatly improves maintenance efficiency.

[0042] The support frame 410 also includes a detachable placement platform 480, the surface of which is covered with an anti-slip rubber pad 481 for temporary storage of disassembled electrodes to prevent them from slipping and being damaged during placement. The lifting oil tank 200 is fixed to the middle of the frame 500 by a mounting flange at the bottom. The bottom of its oil tank body 210 is directly connected to the oil tank 520 below through an oil discharge port, forming a pipeline-free direct-down oil drain channel. The lifting oil tank 200 includes an oil tank body 210, a support column 220, a worktable 230, a moving platform 240, a sealing ring 250, a drive assembly 260, and a guide mechanism 270.

[0043] The oil tank body 210 has an oil inlet valve mounting hole 211 on one side wall and an oil discharge port on the bottom of the other side wall. A support column mounting base 213 is welded to the center of the bottom, and an overflow port 214 is provided at the bottom. The flow rate of the overflow port 214 is lower than the oil inlet valve flow rate, so as to achieve continuous chip removal and heat dissipation during the processing.

[0044] The oil unloading port is equipped with an oil unloading structure 300, which includes an upper oil level sensor 310, a lower oil level sensor 320, a fifth power source 330, a sealing gasket 340, a first bracket 350, and a sensing probe 360.

[0045] The upper oil level sensor 310 and the lower oil level sensor 320 are respectively installed on the upper and lower ends of the inner wall of the oil tank body 210. The upper oil level sensor 310 is used to detect the highest oil level, and the lower oil level sensor 320 is used to detect the lowest oil level. Both are connected to the control system through shielded cables.

[0046] The fifth power source 330 is fixed to the outer wall of the oil tank body 210 by the corner bracket. The power end of the fifth power source 330 is connected to the first bracket 350. The bottom of the first bracket 350 is fixed with an oil-resistant rubber gasket 340 by bolts. The diameter of the gasket 340 is slightly larger than that of the oil discharge port to ensure the sealing effect.

[0047] The sensing probe 360 ​​is fixed to the outside of the fifth power source 330 via a slot. The sensing probe 360 ​​is powered by a DC power supply and outputs a signal to the control system for detecting the power end status of the fifth power source 330.

[0048] In this embodiment, the fifth power source 330 is a cylinder, and a magnetic ring is provided on the piston inside the cylinder. Magnetic elements are also provided inside the fifth power source 330.

[0049] During operation, when the oil level in the oil tank body 210 rises to the detection position of the upper oil level sensor 310, the upper oil level sensor 310 sends a signal to the control system. The control system outputs a command to ventilate the rodless chamber of the fifth power source 330, causing the piston rod to extend and drive the sealing gasket 340 downward, opening the oil outlet valve. Under the action of gravity, the oil flows directly from the oil outlet valve into the oil tank 520. When the oil level drops to the detection position of the lower oil level sensor 320, the lower oil level sensor 320 sends a signal, and the control system commands the rod chamber of the fifth power source 330 to ventilate, causing the piston rod to retract and the sealing gasket 340 to press against the oil outlet valve, completing the oil discharge. During this process, the sensing probe 360 ​​monitors the position of the magnetic ring in real time. If the piston rod does not extend or retract as instructed, the control system will trigger an audible and visual alarm signal.

[0050] The bottom end of the support column 220 is fixed inside the oil tank 520, and the top end is connected to the bottom flange of the worktable 230, which is used to place the workpiece to be processed. The moving table 240 is an annular plate structure with a stepped hole in the inner hole. A sealing ring 250 is embedded in the stepped hole. The sealing ring 250 is an O-ring, which realizes dynamic sealing between the moving table 240 and the support column 220 to prevent oil leakage from the mating gap. A drive assembly 260 is provided at the rear end of the moving table 240.

[0051] In the drive assembly 260, the sixth power source 261 is directly connected to the reduction gear 262 and is mounted together on the assembly frame 263, which is fixed to the second bracket 510 of the electrical discharge machining device. The output of the reduction gear 262 passes upward through the assembly frame 263 and is fixed to the drive wheel 264. The synchronous belt 265 is sleeved on the drive wheel 264 and the driven wheel 266. The driven wheel 266 is fixedly connected to a lifting screw 267 and drives it to rotate. The nut seat 268 is fixedly connected to the moving table 240 and is threadedly engaged with the lifting screw 267.

[0052] When the lifting screw 267 rotates, the nut seat 268 and the moving table 240 move up and down in a straight line. In this embodiment, the sixth power source 261 is a servo motor and the reduction device 262 is a planetary reducer.

[0053] A damping lifting rod 271 is connected to each side of the moving platform 240 via a fixed plate. At the same time, a slider 272 is fixedly installed on each side of the moving platform 240.

[0054] The slider 272 cooperates with the slide rail 273, which is vertically fixed on the second bracket 510; the bottom of the damping lifting rod 271 is fixed inside the oil tank 520; under the combined action of the damping lifting rod 271 and the slider 272, it is ensured that the moving platform 240 and the lifting screw 267 can only move in a straight line up and down, and cannot rotate, thus ensuring the stability of the rise.

[0055] When the lifting oil tank 200 is working, the control system starts the sixth power source 261, which drives the lifting screw 267 to rotate through the reduction device 262 and the synchronous belt 265. The nut seat 268 drives the moving table 240 to rise or fall along the support column 220, and cooperates with the guide mechanism 270 to achieve smooth lifting until the working fluid immerses the workpiece to the preset height or resets after processing.

[0056] The top of the lifting platform is also equipped with an indexing plate 280, which can rotate and index the workpiece at a set angle, allowing the EDM machine 100 to complete the EDM machining of the circumferential surface and multiple sides of the workpiece in one operation. The indexing plate 280 is existing technology and was directly purchased from Baojiacheng; its model number is PARW-151.

[0057] Further explanation based on its usage mechanism: I. Pre-processing preparation stage 1. The workpiece is fixed on the indexing plate 280; 2. The control system sends an electrode retrieval command to the tool magazine platform 400; The rotational power source 451 of the tool magazine 450 drives the rotating shaft 453 to rotate through the gearbox 452, which drives the limit plate 457 and the limit seat to rotate synchronously, turning the electrode to be used to the discharge end facing the discharge machine 100; The fourth power source 430 drives the fixing frame 440 and the tool magazine 450 to slide along the fourth linear guide rail 420, so that the displacement path of the target electrode and the chuck 1251 of the discharge machine 100 are precisely aligned.

[0058] Simultaneously, the three-axis displacement module 110 of the discharge machine 100 works in coordination to move the chuck 1251 down to the electrode, completing the electrode installation; 3. The oil tank initial liquid level adjustment control system commands the fifth power source 330 of the unloading structure 300 to be in the reset state, the piston rod retracts and drives the sealing gasket 340 to press the unloading port, closing the oil drain channel; the oil inlet valve is opened to inject working fluid into the oil tank body 210 until the liquid level reaches the processing preset height (between the upper and lower oil level sensors 320), providing a medium environment for discharge processing.

[0059] II. Collaborative Operation Stage of the Processing Process 1. Precision Positioning and Machining Control System of Three-Axis Displacement Module 110 According to the machining path instructions, the three-axis displacement module 110 of the discharge machine 100 is driven to move in linkage to achieve precise spatial displacement of the discharge component 120: the first power source 1113 drives the first ball screw 1112 to rotate, which drives the first nut seat 1114 and the sliding connector 114 to move along the first linear guide rail 1111 to move along the X-axis; the second power source 1123 drives the second ball screw 1122 to rotate, which drives the second nut seat 1124 and the sliding connector 114 to move along the second linear guide rail 1121 to move along the Y-axis; the third power source 1135 drives the third ball screw 1134 to rotate, which drives the spindle 121 and the discharge component 120 to move along the third linear guide rail 1133 to move along the Z-axis.

[0060] The three-axis displacement works in tandem to ensure that the machining end of the electrode is precisely aligned with the workpiece machining surface; at the same time, the indexing plate 280 rotates and indexes according to a preset program, causing the workpiece to change its machining angle, thus enabling multi-directional machining to be completed in one clamping.

[0061] 2. When the machining process requires electrode replacement, the control system triggers the electrode switching process (as above). After the electrode switching is completed, the three-axis displacement module 110 drives the new electrode back to the machining position to continue the subsequent machining process.

[0062] 3. The oil inlet valve continuously injects working fluid into the oil tank, and the overflow port 214 at the bottom of the oil tank continuously overflows at a rate lower than the oil inlet flow rate, discharging the chips generated during processing with the overflow fluid to achieve continuous chip removal and heat dissipation; the drive component 260 of the lifting oil tank 200 can drive the moving table 240 to rise and fall smoothly along the support column 220 according to processing requirements, adjusting the depth of the workpiece immersed in the working fluid to ensure processing stability.

[0063] III. Post-processing reset and maintenance stage: After all processing steps are completed, the control system commands the discharge machine 100 and the three-axis displacement module 110 to drive the discharge component 120 back to the initial position; the indexing plate 280 stops rotating and resets to the zero position; the sixth power source 261 drives the lifting screw 267 to rotate, driving the moving table 240 and the worktable 230 to descend to the low position; the oil unloading structure 300 keeps the oil unloading port open and drains the remaining working fluid in the oil tank.

[0064] Electrode return and equipment maintenance: The discharge machine 100 puts the processed electrode back into the corresponding limit seat of the tool magazine 450. The rotation power source 451 drives the electrode to return to the initial storage position. If the tool magazine 450 needs to be inspected, the rotating part 472 of the top cover 470 can be flipped directly without disassembling the overall structure, which is convenient. The temporarily disassembled electrode can be placed on the placement platform 480 of the support frame 410. The anti-slip rubber pad 481 can effectively prevent the electrode from slipping and being damaged.

[0065] In summary, the X, Y, and Z axis linear displacement provided in this application, combined with the C-axis assembly 125° rotation adjustment and the indexing plate driving the workpiece rotation, forms a multi-axis, multi-angle adjustment system. Moreover, the displacement of each axis is automatically controlled through the collaboration of the power source and the control system, without the need for manual intervention, which effectively improves processing efficiency and processing accuracy, and can meet the processing needs of complex workpieces in multiple directions and angles.

[0066] The tool magazine platform provided in this application drives a precise alignment chuck through a fourth power source. The rotating power source drives the limit seat to rotate, realizing the switching of multiple electrode models. The limit opening and limit ball in the limit seat ensure the stability of the electrode. With the top cover protection structure, it not only meets the need for rapid switching of different electrodes in continuous machining, but also avoids damage to the tool magazine components by machining contaminants.

[0067] The lifting oil tank provided in this application achieves automated lifting through a drive component. The oil unloading structure uses dual oil level sensors to monitor the oil level and works with a fifth power source to achieve automated oil unloading. The sensing probe monitors the oil unloading action status in real time to ensure stable oil level and reliable oil unloading. At the same time, the overflow port achieves continuous chip removal and heat dissipation, and the damping lifting rod and slider work together to ensure smooth lifting of the oil tank, thus comprehensively ensuring the stability of the processing process.

[0068] The above embodiments are only for illustrating the technical concept and features of this solution, and are intended to enable those skilled in the art to understand the content of this solution and implement it accordingly. They should not be used to limit the scope of protection of this solution. All equivalent transformations or modifications made in accordance with the spirit and essence of this solution should be included within the scope of protection of this solution.

[0069] In the description of this solution, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.

[0070] Those skilled in the art can understand the specific meaning of the above terms in this solution based on the specific circumstances.

[0071] It should be understood that the above-described embodiments are merely exemplary and not restrictive. Any obvious or equivalent modifications or substitutions made by those skilled in the art regarding the above details without departing from the basic principles of this solution will be included within the scope of protection of this solution.

Claims

1. An electrical discharge machining (EDM) apparatus, comprising an EDM machine, a lifting oil tank, and a tool magazine platform, characterized in that, The discharge generator is fixed to the top frame of the equipment, with a tool magazine platform fixed to the side and a worktable facing the center of the lifting oil tank at the bottom. The discharge generator includes a displacement module and a discharge assembly that can be automatically controlled. The spindle of the discharge assembly is slidably connected to the displacement module. The displacement module can drive the discharge assembly to make linear displacement along the X, Y, and Z axes. An insulating structure and a rotating shaft structure that can drive the electrode to rotate are connected in sequence at the bottom of the spindle. The rotating shaft structure is connected to a chuck for holding the electrode seat, with the electrode facing vertically downwards and directly facing the worktable of the lifting oil tank. The electrode displacement path of the tool magazine platform corresponds to the chuck of the discharge generator and can realize automatic switching of the electrode. The lifting oil tank includes an oil draining structure and can realize automatic lifting to adapt to processing needs.

2. The electrical discharge machining equipment according to claim 1, characterized in that, The displacement module includes a first displacement component, a second displacement component, and a third displacement component. The first displacement component is fixed to the top of the frame. The second displacement component is connected to the first displacement component through a sliding connector, and the first displacement component can drive the sliding connector and the second displacement component to move along the X-axis. The second displacement component can drive the third displacement component to move along the Y-axis. The guide rail frame of the third displacement component is fixed on the second displacement component, and a third linear guide rail is provided on the guide rail frame. The spindle seat is slidably connected to the third linear guide rail through a slider, and the driving component of the third displacement component can drive the spindle seat to slide along the third linear guide rail to achieve Z-axis displacement.

3. The electrical discharge machining equipment according to claim 2, characterized in that, An insulating structure and a rotating shaft structure capable of driving the electrodes to rotate are sequentially connected to the bottom of the main shaft, and the rotating shaft structure is connected to the chuck.

4. The electrical discharge machining equipment according to claim 1, characterized in that, The tool magazine platform is equipped with a rotary drive structure that can drive the limit seats to rotate to switch the electrodes to be used. The rotary drive structure includes a rotary power source. The power end of the rotary power source is connected to the rotary shaft through a speed change structure. A connecting plate is fixed on the outside of the rotary shaft, and a limit plate is sleeved under the connecting plate. Limit seats are evenly distributed on the outer periphery of the limit plate. A limit groove is provided on one side of the limit seat, and a limit structure for cooperating with the electrode seat is provided in the limit groove.

5. The electrical discharge machining equipment according to claim 4, characterized in that, The tool magazine platform is equipped with a sliding structure, which includes a fourth power source, a fixed frame, and a fourth slider. The fourth power source is connected to the tool magazine through the fixed frame, and the fourth slider is connected to the back of the fixed frame and is slidably connected to the fourth linear guide rail at the top of the support frame.

6. The electrical discharge machining equipment according to claim 5, characterized in that, The support frame is provided with a top cover, which includes a fixed part and a rotating part. The fixed part has a clearance opening on the side facing the discharge machine that corresponds to the sensor detection end and the tool displacement path. The fixed part has an opening on one side, and the rotating part matches the opening of the fixed part and is rotatably connected by a movable part.

7. The electrical discharge machining equipment according to claim 1, characterized in that, The lifting oil tank also includes a drive assembly for lifting the moving platform. The drive assembly includes a sixth power source and a reduction gear. The sixth power source and the reduction gear are connected and installed together on the assembly frame. The output end of the reduction gear is fixed to the drive wheel. The synchronous belt is sleeved on the drive wheel and the driven wheel, and the driven wheel is fixedly connected to the lifting screw. The moving platform is threadedly engaged with the lifting screw through a nut seat.

8. The electrical discharge machining equipment according to claim 7, characterized in that, The lifting oil tank also includes a guiding mechanism, which includes a slider and a damping lifting rod fixed on both sides of the moving platform. The slider cooperates with the slide rail that is vertically fixed on the bracket, and the bottom of the damping lifting rod is fixed inside the oil tank.

9. The electrical discharge machining equipment according to claim 8, characterized in that, The oil unloading structure includes upper and lower oil level detection elements, a drive component, and a seal for detecting oil level. The drive component can drive the seal to open and close the oil unloading port. The drive component is fixed to the outer wall of the oil tank body by a bracket, and the power end of the drive component is connected to the bracket. The seal is fixed to the bottom of the bracket. A sensing probe for detecting the state of its power end is provided on the outside of the drive component. The bottom of the oil tank body is connected to the lower oil tank through the oil unloading port to form a direct-down oil drain channel.

10. The electrical discharge machining equipment according to claim 1, characterized in that, The top of the workbench is equipped with an indexing plate that can drive the workpiece to rotate and index.

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