Electric spark drilling system

Abstract

The invention discloses an electric spark drilling system which comprises a main shaft piece arranged on a feeding system of a machine tool, the main shaft piece comprises a main shaft seat and a power piece, the main shaft seat is arranged on the feeding system, and the power piece provides drilling power on the main shaft seat; the spark drilling part is arranged on the main shaft part and comprises a drill bit part, a spark impact part and a uniform drilling part, the drill bit part is arranged on the main shaft seat in a circumferential rotating and axial sliding mode and is in transmission connection with the power part, and the spark impact part is arranged on the main shaft seat and is connected with the drill bit part. And the uniform drilling part is used for providing power for axial vibration impact of the drill bit part, and is in transmission connection with the main shaft part, the drill bit part and the spark impact part at the same time so as to drive the spark impact part to rotate slowly and stably. The drill bit is reasonable in structural design, high in drilling efficiency, low in drill bit wear rate and high in drilling quality.

Description

Technical Field

[0001] This invention relates to the field of milling technology, and more specifically, to an electrical discharge machining system. Background Technology

[0002] With the rapid development of modern metal processing industry, many new materials with high strength and hardness have emerged. However, these high strength and hardness make them difficult to process. To address this issue, a composite cutting tool with an electrode and a milling cutter has been proposed. During cutting, the workpiece surface is first softened by electrical discharge through the electrode, and then the milling cutter cuts the softened surface. However, existing composite cutting tools continuously apply pressure to the workpiece and rotate at high speed during the cutting process, resulting in low drilling efficiency, high drill wear rate, and poor drilling quality. Summary of the Invention

[0003] To overcome the above-mentioned defects, the present invention provides an electrical discharge drilling system, specifically adopting the following technical solution: An electrical discharge drilling system, comprising: A spindle assembly, which is mounted on the feed system of a machine tool, includes a spindle seat and a power unit. The spindle seat is mounted on the feed system, and the power unit provides drilling power on the spindle seat. A spark drilling component is mounted on the spindle assembly. The spark drilling component includes a drill bit, a spark impactor, and a uniform drilling component. The drill bit is circumferentially rotatable and axially slidable on the spindle seat and is connected to the power component. The spark impactor is connected to the drill bit on the spindle seat to provide power for the axial vibration impact of the drill bit. The uniform drilling component is simultaneously connected to the spindle assembly, the drill bit, and the spark impactor to drive the spark impactor to rotate slowly and stably.

[0004] Preferably, the drill bit assembly includes a clamping seat, a drill bit, and a drive shaft. The top end of the clamping seat is axially and circumferentially locked and fitted into the inner ring of the first bearing in the spindle seat. The drill bit is installed in a clamping hole on the bottom end face of the clamping seat. The top end of the drive shaft is connected to the output shaft of the power component, and the bottom end of the drive shaft is axially and circumferentially locked and connected to the top surface of the clamping seat.

[0005] Preferably, the drill bit is provided with a flexible electrode and a drill bit, both of which are disposed on the tip of the drill bit, and a plurality of the flexible electrodes and a plurality of the drill bits are distributed circumferentially alternately.

[0006] Preferably, the spark impact component includes a drilling impact component and a spark power supply component, both of which are mounted on the spindle seat, and the spark power supply component is rotatably electrically connected to the drilling impact component.

[0007] Preferably, the drilling impact component includes a first support base, a first permanent magnet, a second permanent magnet, a second support base, and a third permanent magnet. The first support base is circumferentially rotatable and axially locked within the bottom tube of the spindle seat. The first permanent magnet is disposed on the bottom surface of a first annular plate within the first support tube. The second permanent magnet is disposed on the bottom surface of the first support base, with the magnetic poles of the top surface of the second permanent magnet and the bottom surface of the first permanent magnet being opposite. The second support base is fitted onto the outer wall of the top of the clamping seat and is located between the first and second permanent magnets. The third permanent magnet is disposed on the second support base and is located between the first and second permanent magnets. Simultaneously, the magnetic poles of the top surface of the third permanent magnet are the same as those of the bottom surface of the first permanent magnet, and the magnetic poles of the bottom surface of the third permanent magnet are the same as those of the top surface of the second permanent magnet, causing the second support base to suspend between the first and second permanent magnets.

[0008] Preferably, the first permanent magnet includes a first thin magnet and a first thick magnet. The top surface of the first thin magnet is disposed on the first annular plate, and a plurality of the first thin magnets are distributed at equal intervals around the first annular plate in the circumferential direction. The thickness of the first thick magnet is greater than the thickness of the first thin magnet. The top surface of the first thick magnet is disposed on the first annular plate, and a plurality of the first thick magnets and a plurality of the first thin magnets are distributed alternately.

[0009] Preferably, the second permanent magnet includes a second thin magnet and a second thick magnet. The bottom surface of the second thin magnet is disposed on the bottom surface of the first support base. A plurality of second thin magnets are distributed at equal intervals around the bottom surface of the first support base, and each of the plurality of second thin magnets is located directly below a plurality of first thick magnets. The thickness of the second thick magnet is greater than that of the second thin magnet. The bottom surface of the second thick magnet is disposed on the bottom surface of the first support base. The plurality of second thick magnets and the plurality of second thin magnets are distributed alternately and at intervals, and each of the plurality of second thick magnets is located directly below a plurality of first thin magnets.

[0010] Preferably, the plurality of third permanent magnets are evenly distributed around the second support base in the circumferential direction, and the distance from the axis of the third permanent magnet to the axis of the first support base is the same as the distance from the axis of the first permanent magnet to the axis of the first support base and the distance from the axis of the second permanent magnet to the axis of the first support base.

[0011] Preferably, the spark transmission component includes a slip ring, the outer ring of which is embedded in the inner wall of the main shaft seat, and the inner ring of which is rotatably fitted and electrically connected to the outside of the transmission shaft.

[0012] Preferably, the uniform drilling component includes a sun gear, planet gears, and an external gear ring. The sun gear is mounted on the drive shaft and moves with it. The rotation shafts of the planet gears are disposed on the second annular plate, and the planet gears mesh with the sun gear. The external gear ring is embedded in the inner wall of the first support seat, and the external gear ring meshes with the planet gears.

[0013] The present invention has at least the following beneficial effects: 1) The electric discharge drilling system of the present invention has a reasonable structural design, high drilling efficiency, low drill bit wear rate, and high drilling quality; 2) The electrical discharge drilling system of the present invention is provided with a drill bit, a flexible electrode and a drill bit. Multiple flexible electrodes and multiple drill bits are circumferentially alternately distributed on the cutting edge of the drill bit. During the drilling process, the flexible electrodes are pre-discharged with high frequency pulses to generate instantaneous extremely high temperatures, forming a thermal softening layer on the surface of the material. The material is then removed by cutting with the drill bit in a timely manner, which significantly improves the drilling efficiency and reduces the wear rate of the drill bit.

[0014] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0015] Figure 1 This is a front view of the electrical discharge drilling system of the present invention; Figure 2 This is a three-dimensional structural diagram of the electrical discharge drilling system of the present invention; Figure 3 The present invention provides an electrical discharge drilling system. Figure 1 Front view of the cross section along the AA direction; Figure 4 The present invention provides an electrical discharge drilling system. Figure 3 A magnified view of part B in the image; Figure 5 The present invention provides an electrical discharge drilling system. Figure 1 Schematic diagram of the three-dimensional structure in the AA direction section; Figure 6 The present invention provides an electrical discharge drilling system. Figure 5 A magnified view of part C; Figure 7 The present invention provides an electrical discharge drilling system. Figure 1 Schematic diagram of the three-dimensional structure in the DD direction; Figure 8 This is a three-dimensional structural diagram of the drill bit in the electrical discharge drilling system of the present invention; Figure 9 The present invention provides an electrical discharge drilling system. Figure 8 A magnified view of part E in the image.

[0016] Wherein: 1-spindle seat, 2-power component, 3-first bearing, 4-clamping seat, 5-drill bit, 6-drive shaft, 7-nut, 8-flexible electrode, 9-drill insert, 10-electrode micro-hole, 11-bolt, 12-spiral groove, 13-first support seat, 16-second support seat, 17-third permanent magnet, 18-first annular plate, 19-second bearing, 20-first thrust ball bearing, 21-second annular plate, 22-second thrust ball bearing, 23-first thin magnet, 24-first thick magnet, 25-second thin magnet, 26-second thick magnet, 28-slip ring, 29-sun gear, 30-planet gear, 31-external gear ring, 32-hexagonal hole. Detailed Implementation

[0017] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and by way of embodiments. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0018] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0019] Example 1 according to Figures 1-9 As shown, an electrical discharge drilling system includes a spindle and a spark drill. The spindle is mounted on the feed system of a machine tool (drilling machine or CNC machine tool), and the feed system controls the drilling depth and drilling speed. The spark drill is mounted on the spindle to perform electrical discharge drilling on the workpiece to be machined.

[0020] The spindle assembly includes a spindle seat 1 and a power unit 2. The spindle seat 1 is mounted on the feed system, and the power unit 2 provides drilling power to the spindle seat 1. The spindle seat 1 is generally tubular, and a first bearing 3 is installed in the bearing chamber at the bottom of the spindle seat 1. The first bearing 3 provides support and guidance for the spark drill bit. Alternatively, the first bearing 3 is a cross roller bearing. The power unit 2 is fixedly embedded in the top tube of the spindle seat 1.

[0021] The spark drilling component includes a drill bit, a spark impactor, and a uniform drilling component. The drill bit is circumferentially rotatable and axially slidable on the spindle seat 1 and is connected to the power component 2. The spark impactor is connected to the drill bit on the spindle seat 1 to provide power for the axial vibration impact of the drill bit. The uniform drilling component is simultaneously connected to the spindle, the drill bit, and the spark impactor to drive the spark impactor to rotate slowly and stably.

[0022] The drill bit assembly includes a clamping seat 4, a drill bit 5, and a drive shaft 6. The top end of the clamping seat 4 is axially sliding and circumferentially locked in the inner ring of the first bearing 3. The drill bit 5 is installed in the clamping hole on the bottom end face of the clamping seat 4. The top end of the drive shaft 6 is connected to the output shaft of the power component 2. The bottom end of the drive shaft 6 is axially sliding and circumferentially locked to the top surface of the clamping seat 4.

[0023] The slider on the inner wall of the inner ring is slidably fitted into a groove on the side wall of the clamping seat 4, the longitudinal line of the groove being parallel to the axis of the clamping seat 4. An external thread is provided on the outer side wall of the bottom end of the clamping seat 4, and a nut 7 is fitted onto the external thread. When the nut 7 is continuously rotated in the forward direction, it tightens the clamping hole, firmly clamping the base of the drill bit 5 within the clamping hole, facilitating drilling of the workpiece by the drill bit 5. The bottom end of the drive shaft 6 is hexagonal prism-shaped, and its bottom end is axially slidably fitted into a hexagonal hole 32 on the top surface of the clamping seat 4. The travel of the bottom end of the drive shaft 6 within the hexagonal hole 32 satisfies the reciprocating sliding travel requirement of the clamping seat 4 along the Z-axis. Alternatively, the bottom end face of the drive shaft 6 and the bottom surface of the hexagonal hole 32 are electrically connected by a spring wire to improve the electrical transmission stability between the drive shaft 6 and the clamping seat 4.

[0024] Furthermore, the drill bit 5 is equipped with a flexible electrode 8 and drill cutting blades 9. Both the flexible electrode 8 and the drill cutting blades 9 are located on the tip of the drill bit 5, and multiple flexible electrodes 8 and multiple drill cutting blades 9 are distributed alternately in a circumferential manner. The flexible electrode 8 is made of foamed carbon, possessing a unique porous three-dimensional network structure, and has multiple electrode micropores 10. High-pressure working fluid can directly penetrate the electrode body and be uniformly sprayed from the multiple electrode micropores 10 on the entire surface of the front end of the flexible electrode 8, ensuring a stable discharge process. Simultaneously, it exhibits strong resistance to electrolytic corrosion and extremely low loss rate, allowing one electrode to process more and deeper holes. Alternatively, the flexible electrode 8 adopts a fan-shaped structure with a thickness of 1.2 mm and an arc length of 14 mm, capable of covering a larger processing area and extending the effective discharge time. The wrap angle of the flexible electrode 8 is approximately 75°, ensuring that the electrode can fully soften the material while leaving as much space as possible for tool cutting and chip removal. The flexible electrode 8 has a single-sided discharge gap of 0.05 mm. To avoid the sharp corners on the electrode producing a point discharge effect, the four sharp corners of the electrode are rounded into small arc corners with a radius of 0.1 mm. A certain installation gap is reserved between the flexible electrode 8 and the drill bit, which facilitates glue fixation and allows for minor errors during electrode installation, thereby enhancing the adaptability and robustness of the process.

[0025] The drill bit 9 is mounted in a positioning groove on the cutting edge of the drill bit 5 by bolts 11. The distance from the outer edge of the drill bit 9 to the axis of the drill bit 5 is greater than the distance from the outer edge of the flexible electrode 8 to the axis, ensuring that the discharge and mechanical cutting cooperate without interference. The drill bit 9 adopts a helical cutting edge design, which can achieve smoother entry and improve cutting stability. The drill bit 9 uses a ceramic insulating insert, and the bolts 11 are non-conductive zirconia ceramic bolts 11, which can avoid conductive interference during the discharge process. The cutting edge surface of the drill bit 9 adopts a special textured structure, which instantly breaks and directs the chips and reduces frictional heat, achieving efficient chip removal. The axial distance between the drill bit 9 and the flexible electrode 8 is a small gap, about 2mm, ensuring that the drill bit 9 cuts the material layer that has been pre-heat-softened by the electrical discharge but has not been completely eroded, thereby significantly reducing the cutting force and achieving efficient machining. During the drilling process, the flexible electrode 8 is pre-discharged with high-frequency pulses, generating an instantaneous extremely high temperature, forming a thermally softened layer on the material surface, and then the material is promptly cut away.

[0026] It should be noted that the drill bit 5 is made of cemented carbide, providing necessary support rigidity and chip clearance. The drill bit 5 has a diameter of 8mm. When machining difficult-to-machine materials such as titanium alloys, a small helix angle is required to ensure cutting edge strength and core thickness. To achieve the optimal balance between strength and chip removal capability, the drill bit 5 is equipped with a helical groove 12. The helix angle of the helical groove 12 is 30°, and the pitch of the helical groove 12 is 49mm. The helical groove 12 starts close to the cutting edge and extends backward. Its groove width has been optimized and is significantly larger than conventional groove types, ensuring smooth chip removal during machining. The helical groove 12 extends from the starting position of the cutting edge, ensuring a continuous and efficient chip removal path, thereby improving drilling stability.

[0027] The spark impact component includes a drilling impact component and a spark power transmission component. Both the drilling impact component and the spark power transmission component are mounted on the spindle seat 1, and the spark power transmission component is rotatably electrically connected to the drilling impact component to supply negative electricity to the drill bit 5 of the drilling impact component.

[0028] The drilling impact component includes a first support base 13, a first permanent magnet, a second permanent magnet, a second support base 16, and a third permanent magnet 17. The first support base 13 is circumferentially rotatable and axially locked within the bottom tube of the spindle seat 1. The first permanent magnet is fixedly mounted on the bottom surface of the first annular plate 18 within the first support tube. The second permanent magnet is fixedly mounted on the bottom surface of the first support base 13, with the magnetic poles of the top surface of the second permanent magnet and the bottom surface of the first permanent magnet being opposite (the top surface of the second permanent magnet and the bottom surface of the first permanent magnet attract each other). The second support base 16 is fixedly fitted onto the outer wall of the top of the clamping seat 4, and is located between the first and second permanent magnets. The third permanent magnet 17 is fixedly mounted on the second support base 16, and is located between the first and second permanent magnets. The top surface of the third permanent magnet 17 has the same magnetic pole as the bottom surface of the first permanent magnet, and the bottom surface of the third permanent magnet 17 has the same magnetic pole as the top surface of the second permanent magnet. This suspends the second support base 16 between the first and second permanent magnets. The distance between the first permanent magnet and the axis of the first support 13 is the same as the distance between the second permanent magnet and the axis of the first support 13.

[0029] Furthermore, the first support base 13 is generally cylindrical, with a first through hole on its top surface and a second through hole on its bottom surface, the second through hole being fitted over the top of the clamping base 4. The first support base 13 is rotatably fitted into the spindle seat 1 tube via a second bearing 19 with an outer ring. The top of the first support base 13 is rotatably connected to the bottom surface of the second annular plate 21 on the inner wall of the spindle seat 1 via a first thrust ball bearing 20 (the outer ring of the second annular plate 21 is fixedly fitted into the inner wall of the spindle seat 1), and the bottom of the first support base 13 is rotatably connected to the bottom surface of the spindle seat 1 via a second thrust ball bearing 22.

[0030] The first permanent magnet includes a first thin magnet 23 and a first thick magnet 24. The top surface of the first thin magnet 23 is fixedly disposed on the first annular plate 18. Six first thin magnets 23 are distributed at equal intervals around the first annular plate 18. The thickness of the first thick magnet 24 is greater than the thickness of the first thin magnet 23. The top surface of the first thick magnet 24 is fixedly disposed on the first annular plate 18. The six first thick magnets 24 and the six first thin magnets 23 are distributed alternately.

[0031] The second permanent magnet includes a second thin magnet 25 and a second thick magnet 26. The bottom surface of the second thin magnet 25 is fixedly disposed on the bottom surface of the first support base 13. Six second thin magnets 25 are distributed circumferentially at equal intervals around the bottom surface of the first support base 13, and each of the six second thin magnets 25 is located directly below the six first thick magnets 24. The thickness of the second thick magnet 26 is greater than that of the second thin magnet 25. The bottom surface of the second thick magnet 26 is fixedly disposed on the bottom surface of the first support base 13. The six second thick magnets 26 and the six second thin magnets 25 are distributed alternately, and each of the six second thick magnets 26 is located directly below the six first thin magnets 23.

[0032] The third permanent magnet 17 is provided in six parts, and the six third permanent magnets 17 are evenly distributed around the second support base 16 in the circumference. The distance from the axis of the third permanent magnet 17 to the axis of the first support base 13 is the same as the distance from the first permanent magnet to the axis of the first support base 13 and the distance from the second permanent magnet to the axis of the first support base 13.

[0033] It should be noted that when the power component 2 drives the clamping seat 4 to rotate circumferentially for cutting via the transmission shaft 6, the clamping seat 4 will drive the second support seat 16 to rotate. The second support seat 16 will drive the six third permanent magnets 17 to rotate one by one to directly below the six first thick magnets 24. At this time, since the third permanent magnets 17 are closer to the first thick magnets 24 and farther from the second thin magnets 25, the repulsive force of the first thick magnets 24 on the third permanent magnets 17 is greater than the repulsive force of the second thin magnets 25 on the third permanent magnets 17. This will push the third permanent magnets 17 to descend to a predetermined height. The third permanent magnets 17 will drive the drill bit 5 to descend to a predetermined height via the second support seat 16 and the clamping seat 4. The drill bit 5, which has descended to a predetermined height, will perform impact drilling on the workpiece to be processed. Continue rotating the second support base 16, causing the six third permanent magnets 17 to rotate one by one to be directly above the six second thick magnets 26. At this time, because the third permanent magnets 17 are closer to the second thick magnets 26 and farther from the first thin magnets 23, the repulsive force of the second thick magnets 26 on the third permanent magnets 17 is greater than the repulsive force of the first thin magnets 23 on the third permanent magnets 17. This pushes the third permanent magnets 17 to rise to a predetermined height. The third permanent magnets 17, through the second support base 16 and the clamping base 4, drive the drill bit 5 to rise to a predetermined height. The drill bit 5, having risen to the predetermined height, disengages from the impact drilling of the workpiece. By continuously rotating the clamping base 4, the drill bit 5 can perform axial vibration drilling of the workpiece using electrical discharge machining. This embodiment is equipped with six first thick magnets 24 and six second thick magnets 26, thus enabling the drill bit 5 to achieve six vibration impacts in one revolution.

[0034] The spark plug connection includes a slip ring 28. The outer ring of the slip ring 28 (coil) is embedded in the inner wall of the main shaft seat 1, and the inner ring of the slip ring 28 is fitted and electrically connected to the outside of the drive shaft 6. Furthermore, the slip ring 28 conducts electricity by means of a brush contacting the annular track on the rotating drive shaft 6.

[0035] The uniform drilling component includes a sun gear 29, planet gears 30, and an external gear ring 31. The sun gear 29 is fixedly mounted on the transmission shaft 6 and moves with it. The rotating shafts of the planet gears 30 are fixedly mounted on the second annular plate 21, and the planet gears 30 mesh with the sun gear 29. The four planet gears 30 are evenly distributed around the sun gear 29. The external gear ring 31 is fixedly embedded in the inner wall of the first support seat 13, and the external gear ring 31 meshes with the four planet gears 30 simultaneously.

[0036] When the power component 2 drives the clamping seat 4 to rotate in the forward direction, it will drive the external gear ring 31 to rotate in the reverse direction through the sun gear 29 and the planet gear 30. The external gear ring 31 will drive the first support seat 13 to rotate in the reverse direction, and the first support seat 13 will simultaneously drive the first permanent magnet and the second permanent magnet to rotate in the reverse direction. Therefore, the drill bit 5 can rotate more than six times when it rotates one revolution. When the first support seat 13 is circumferentially fixed, the first permanent magnet and the second permanent magnet will also be circumferentially fixed, that is, the descent and ascent trajectory of the drill bit 5 will be circumferentially fixed. This will fix the descent cutting part of the drill bit 5, resulting in uneven circumferential drilling. However, when the first support seat 13 rotates circumferentially, the above problems will not occur, significantly improving the quality and efficiency of EDM drilling.

[0037] Example 2 The similarities between this embodiment and Embodiment 1 will not be repeated here. The differences are as follows: The electrical discharge machining (EDM) system further includes a movable workpiece and an electrolyte circulation system. The movable workpiece is mounted on the machine tool's worktable, and the electrolyte circulation system is mounted on the movable workpiece. The movable workpiece includes a movable worktable and a force gauge. The movable worktable is mounted on the worktable and moves with it. The force gauge is mounted on the movable worktable, and its upper surface is used to mount the workpiece to be machined. The movable worktable drives the workpiece to move along the X and Y axes. The force gauge is used to detect the pressure between the drill bit and the workpiece during the drilling process. The force gauge converts the cutting force into a weak charge signal through a piezoelectric sensor, which is then amplified by a charge amplifier and converted into a low-impedance voltage signal, ultimately transmitted to the control terminal for display and processing. The workpiece to be machined is electrically connected to the positive terminal of the power supply, and the drill bit is electrically connected to the negative terminal of the power supply.

[0038] The electrolyte circulation device includes an upward-opening storage tank for storing electrolyte, a spray head for spraying electrolyte (the spray head is used to spray the electrolyte onto the drill bit during the drilling process), and a circulation pump for drawing electrolyte from the storage tank to the spray head.

[0039] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An electrical discharge drilling system, characterized in that, include: A spindle assembly, which is mounted on the feed system of a machine tool, includes a spindle seat and a power unit. The spindle seat is mounted on the feed system, and the power unit provides drilling power on the spindle seat. A spark drilling component is mounted on the spindle assembly. The spark drilling component includes a drill bit, a spark impactor, and a uniform drilling component. The drill bit is circumferentially rotatable and axially slidable on the spindle seat and is connected to the power component. The spark impactor is connected to the drill bit on the spindle seat to provide power for the axial vibration impact of the drill bit. The uniform drilling component is simultaneously connected to the spindle assembly, the drill bit, and the spark impactor to drive the spark impactor to rotate slowly and stably.

2. The electrical discharge drilling system according to claim 1, characterized in that, The drill bit assembly includes a clamping seat, a drill bit, and a drive shaft. The top end of the clamping seat is axially and circumferentially locked and fitted into the inner ring of the first bearing in the spindle seat. The drill bit is installed in the clamping hole on the bottom end face of the clamping seat. The top end of the drive shaft is connected to the output shaft of the power component, and the bottom end of the drive shaft is axially and circumferentially locked and connected to the top surface of the clamping seat.

3. The electrical discharge drilling system according to claim 2, characterized in that, The drill bit is provided with a flexible electrode and a drill bit. The flexible electrode and the drill bit are both located on the tip of the drill bit, and a plurality of the flexible electrodes and a plurality of the drill bits are distributed alternately in the circumferential direction.

4. The electrical discharge drilling system according to claim 2 or 3, characterized in that, The spark impact component includes a drilling impact component and a spark power supply component. Both the drilling impact component and the spark power supply component are mounted on the spindle seat, and the spark power supply component is rotatably electrically connected to the drilling impact component.

5. The electrical discharge drilling system according to claim 4, characterized in that, The drilling impact component includes a first support base, a first permanent magnet, a second permanent magnet, a second support base, and a third permanent magnet. The first support base is circumferentially rotatable and axially locked within the bottom tube of the spindle seat. The first permanent magnet is disposed on the bottom surface of a first annular plate within the first support tube. The second permanent magnet is disposed on the bottom surface of the first support base, with the magnetic poles of the top surface of the second permanent magnet and the bottom surface of the first permanent magnet being opposite. The second support base is fitted onto the outer wall of the top of the clamping seat and is located between the first and second permanent magnets. The third permanent magnet is disposed on the second support base and is located between the first and second permanent magnets. Simultaneously, the magnetic poles of the top surface of the third permanent magnet are the same as those of the bottom surface of the first permanent magnet, and the magnetic poles of the bottom surface of the third permanent magnet are the same as those of the top surface of the second permanent magnet, causing the second support base to suspend between the first and second permanent magnets.

6. The electrical discharge drilling system according to claim 5, characterized in that, The first permanent magnet includes a first thin magnet and a first thick magnet. The top surface of the first thin magnet is disposed on the first annular plate. A plurality of the first thin magnets are distributed at equal intervals around the first annular plate. The thickness of the first thick magnet is greater than the thickness of the first thin magnet. The top surface of the first thick magnet is disposed on the first annular plate. A plurality of the first thick magnets and a plurality of the first thin magnets are distributed alternately.

7. The electrical discharge drilling system according to claim 6, characterized in that, The second permanent magnet includes a second thin magnet and a second thick magnet. The bottom surface of the second thin magnet is disposed on the bottom surface of the first support base. A plurality of second thin magnets are distributed circumferentially at equal intervals around the bottom surface of the first support base, and each of the plurality of second thin magnets is located directly below a plurality of first thick magnets. The thickness of the second thick magnet is greater than that of the second thin magnet. The bottom surface of the second thick magnet is disposed on the bottom surface of the first support base. The plurality of second thick magnets and the plurality of second thin magnets are distributed alternately and at intervals, and each of the plurality of second thick magnets is located directly below a plurality of first thin magnets.

8. The electrical discharge drilling system according to claim 6, characterized in that, The plurality of third permanent magnets are evenly distributed around the second support base in the circumferential direction, and the distance from the axis of the third permanent magnet to the axis of the first support base is the same as the distance from the axis of the first permanent magnet to the axis of the first support base and the distance from the axis of the second permanent magnet to the axis of the first support base.

9. The electrical discharge drilling system according to claim 6, characterized in that, The spark transmission component includes a slip ring, the outer ring of which is embedded in the inner wall of the main shaft seat, and the inner ring of which is rotatably fitted and electrically connected to the outside of the drive shaft.

10. The electrical discharge drilling system according to claim 2 or 3, characterized in that, The uniform drilling component includes a sun gear, planet gears, and an external gear ring. The sun gear is mounted on the drive shaft and moves with it. The rotation shafts of the planet gears are set on the second annular plate, and the planet gears mesh with the sun gear. The external gear ring is embedded in the inner wall of the first support seat, and the external gear ring meshes with the planet gears.

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