Electric pulse processing device and method based on lathe

Abstract

The invention relates to the technical field of external field auxiliary machining, in particular to an electric pulse treatment machining device and method based on a lathe. The machining device comprises a lathe structure, a positioning assembly and a carbon brush holder assembly. The lathe structure comprises a head chuck and a tail chuck, the head chuck is installed on a spindle chuck of a lathe in an insulated mode, and the tail chuck is installed on a tailstock of the lathe in an insulated mode. The positioning assembly comprises a positioning plate and a fixing plate, the positioning plate and a protective cover of the lathe are installed in an insulating mode, and the fixing plate and the positioning plate are in sliding connection in the axial direction of the lathe. The carbon brush holder assembly comprises a connecting frame and a carbon brush block, the connecting frame is installed on the lower side of the fixing plate and can ascend and descend relative to the fixing plate, the connecting frame is externally connected with a power source, the carbon brush block is installed on the lower side of the connecting frame, and the bottom of the carbon brush block is an arc-shaped face which is connected to the head chuck or the tail chuck in a pressed mode. The machining hardening in the machining process is weakened through the electroplastic effect, the machining difficulty is lowered, and the surface performance of the workpiece is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of external field auxiliary processing, and in particular to an electric pulse processing device and a processing method based on a lathe. Background Art

[0002] In recent years, field-assisted processing technologies have developed rapidly, such as laser plasma heating cutting, conductive heating turning, ultrasonic rolling, ultrasonic shot peening, etc., which have a significant impact on promoting the research of plastic deformation processing. The phenomenon that the plastic deformation ability of metal materials in plastic deformation is significantly improved, the rheological stress is sharply reduced, and the work hardening is inhibited by the action of electric pulses is called the electroplastic effect. In addition, the Joule heating effect and skin effect caused by the action of electric pulses on the material will also have a certain impact on the processing performance and organizational structure of the material.

[0003] The problems existing in the existing technology mainly include: ① Work hardening leads to tool wear, affecting the processing efficiency and workpiece surface quality. ② The surface integrity of difficult-to-process materials is difficult to ensure during the processing, and defects are prone to occur. ③ The installation and adjustment of the existing electric pulse processing device are not flexible enough, and it is difficult to adapt to workpieces of different sizes. ④ During the electric pulse processing, the stability and uniformity of the current are difficult to ensure, affecting the processing effect. Summary of the invention

[0004] In view of the shortcomings of the prior art, an object of the embodiments of the present invention is to provide an electric pulse processing device and a processing method based on a lathe.

[0005] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] An electric pulse processing device based on a lathe, comprising: a lathe structure, a positioning assembly and a carbon brush holder assembly; the lathe structure comprises a head chuck and a tail chuck, the head chuck is insulated and installed on the main shaft chuck of the lathe, and the tail chuck is insulated and installed on the tailstock of the lathe; the positioning assembly comprises a positioning plate and a fixing plate, the positioning plate is insulated and installed on the protective cover of the lathe, and the fixing plate is connected to the positioning plate along the axial direction of the lathe for sliding; the carbon brush holder assembly comprises a connecting frame and a carbon brush block, the connecting frame is installed on the lower side of the fixing plate and can be lifted and lowered relative to the fixing plate, the connecting frame is connected to an external power supply, the carbon brush block is installed on the lower side of the connecting frame, the bottom of the carbon brush block is an arc surface, and the arc surface is pressed onto the head chuck or the tail chuck.

[0007] An embodiment of the present invention also provides a processing method of the electric pulse processing device based on a lathe as described above, including: a head chuck is installed on the spindle chuck of the lathe, a tail chuck is installed on the tailstock of the lathe, and a workpiece is installed between the head chuck and the tail chuck; a positioning assembly is installed on the lower side of the protective cover, and a carbon brush holder assembly is installed on the lower side of the positioning assembly, and the position of the fixed plate along the axial direction of the lathe is adjusted so that the two carbon brush blocks are in contact with the head chuck and the tail chuck respectively; a pulse power supply is connected to the connecting frame, and the positive current is connected to the head chuck through the connecting frame and the carbon brush block, the pulse current flows through the workpiece to reach the tail chuck, and then the current passes through the carbon brush block and the connecting frame and finally reaches the power supply to form the negative pole of the power supply, thereby realizing electric pulse processing during the processing.

[0008] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0009] The device uses the electroplastic effect to reduce the hardening during machining, reduce machining difficulty, and significantly improve the surface performance of the workpiece. In addition, by optimizing the carbon brush holder assembly and insulation treatment, it ensures the smooth passage and stability of the current, while protecting the internal equipment of the lathe from damage.

[0010] The device connects an external power supply and a carbon brush holder to a sheet metal protective cover of a lathe, which is convenient for disassembly and can adjust the axial distance of the carbon brush holder according to the size of the workpiece so that the current can pass through the workpiece smoothly.

[0011] The carbon brush holder and lathe sheet metal protective cover at the positive and negative poles of the power supply are insulated with bakelite, and the tapered shank and cylindrical shank small three-jaw chuck at the workpiece clamping end are treated with insulating tape, effectively protecting the internal equipment of the lathe.

[0012] The device uses an arc-shaped carbon brush, and the arc radius of the carbon brush is consistent with the three-jaw chuck at the workpiece clamping end, so that the two can fit better, reducing the friction between the three-jaw chuck and the carbon brush during processing, and preventing the carbon brush from being worn out and discharging due to excessive friction, resulting in excessive temperature of the device.

[0013] The device connects the overall electric pulse device to the sheet metal protective cover of the lathe. It does not affect the internal structure of the lathe and is easy to disassemble, does not affect the normal use of the lathe cutting, is relatively easy to implement and will not affect the original lathe.

[0014] Advantages of additional aspects of the present invention will be given in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In addition, the spacing or size between each other is exaggerated to show the position of each part, and the schematic diagram is only used for illustration.

[0016] Figure 1 is a schematic diagram of an overall structural assembly provided by an embodiment of the present invention;

[0017] Figure 2 is a schematic diagram of installing a positioning assembly provided by an embodiment of the present invention;

[0018] Figure 3 is a schematic diagram of a positioning component provided by an embodiment of the present invention;

[0019] Figure 4 is a schematic diagram of a carbon brush holder assembly provided by an embodiment of the present invention;

[0020] In the figure: 1. Lathe structure; 101. Protective cover; 102. Tail stock; 103. Tail chuck; 104. Workpiece; 105. Head chuck; 106. Spindle chuck; 2. Carbon brush holder assembly; 201. Plug; 202. Connecting frame; 203. Fixing seat; 204. Hexagonal bolt and nut (M5); 205. Hexagonal bolt and nut (M16); 206. Insulating gasket; 207. Carbon brush arm; 208. Screw; 209. Carbon brush block; 210. Additional copper seat; 3. Positioning assembly; 301. Hexagonal bolt and nut (M10); 302. Positioning plate; 303. Insulating plate; 304. Hexagonal bolt (M8); 305. Fixing plate; 306. Hexagon socket bolt (M4); 307. Hexagonal bolt and nut (M8); DETAILED DESCRIPTION

[0021] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0022] Example 1

[0023] In order to solve the problems of high work hardening caused by difficult-to-machine materials during the machining process, resulting in tool wear, poor integrity of the formed surface, etc., this embodiment proposes an electric pulse processing device based on a lathe, which introduces electric pulses into the cutting process, rolling process, etc., and uses the electroplastic effect to weaken the work hardening during the machining process, thereby reducing the machining difficulty and significantly improving the surface performance of the workpiece.

[0024] like Figure 1 As shown, it includes a lathe structure 1, a positioning assembly 3 and a carbon brush holder assembly 2. The lathe structure 1 includes a head chuck 105 and a tail chuck 103. The head chuck 105 is a cylindrical handle chuck, and the tail chuck 103 is a conical handle chuck. The head chuck 105 is insulated and installed on the spindle chuck 106 of the lathe, and the tail chuck 103 is insulated and installed on the tailstock 102 of the lathe; Figure 2 , Figure 3 As shown, the positioning assembly 3 includes a positioning plate 302 and a fixing plate 305. The positioning plate 302 is insulated and installed with the protection cover 101 of the lathe, and the fixing plate 305 is slidably connected with the positioning plate 302 along the axial direction of the lathe. Figure 4 As shown, the carbon brush holder assembly 2 includes a connecting frame 202 and a carbon brush block 209. The connecting frame 202 is installed on the lower side of the fixed plate 305 and can be raised and lowered relative to the fixed plate 305. The connecting frame 202 is externally connected to a power supply. The carbon brush block 209 is installed on the lower side of the connecting frame 202. The bottom of the carbon brush block 209 is an arc-shaped surface, which is crimped onto the head chuck 105 or the tail chuck 103.

[0025] The head chuck 105 is connected to the spindle chuck 106 by an insulated installation, ensuring that during the machining process, the current only flows through the workpiece 104 and does not directly affect the spindle or other sensitive parts of the lathe. The tail chuck 103 is insulated and connected to the lathe tailstock 102, which also protects the lathe equipment from electrical pulses.

[0026] The positioning assembly 3 is mainly composed of a positioning plate 302 and a fixing plate 305. The positioning plate 302 is fixed to the protective cover 101 of the lathe by bolts to fix and support the carbon brush holder assembly 2. The fixing plate 305 slides along the axial direction of the lathe and can adjust the position of the carbon brush holder assembly 2 according to the different sizes of the workpiece 104, thereby ensuring the conduction effect of the pulse current.

[0027] The carbon brush holder assembly 2 is mainly composed of a connecting frame 202 and a carbon brush block 209. The connecting frame 202 is installed on the lower side of the fixed plate 305 and can be raised and lowered relative to the fixed plate 305 to automatically adjust the contact pressure between the carbon brush block 209 and the workpiece 104 under the action of gravity. The connecting frame 202 is externally connected to a pulse power supply to provide current to the carbon brush block 209. The bottom of the carbon brush block 209 is designed as an arc surface, which contacts the head chuck 105 or the tail chuck 103, thereby ensuring good contact between the carbon brush block 209 and the chuck holding the workpiece 104 during the processing process, avoiding electric pulse failure or equipment damage due to poor contact.

[0028] Through the above design, electric pulses can be effectively introduced during the machining process, and the machining performance of the workpiece 104 can be improved by utilizing the electroplastic effect, while preventing the influence of the electric current on the lathe itself.

[0029] The protective cover 101 has a top plate, and the positioning plate 302 is installed on the lower side of the top plate of the protective cover 101 by bolts. The top plate of the protective cover 101 is an important structural part for installing the positioning component 3. The positioning plate 302 is fixed to the lower side of the top plate of the protective cover 101 by bolts to ensure the stability and safety of the components in the protective cover 101. A pad is provided between the positioning plate 302 and the protective cover 101, and the thickness of the pad is greater than the thickness of the fixing plate 305 located on the upper side of the positioning plate 302, so as to leave enough space for the sliding of the fixing plate.

[0030] The positioning assembly is connected to the protective cover 101 via a hexagonal bolt and nut (M10) 301, and the insulating plate 303 is connected via a hexagonal bolt and nut (M8) 307. The size of the slide groove and the opening groove matches the diameter of the bolt (M8).

[0031] A slide groove is provided on the positioning plate 302, and its function is to allow the fixed plate 305 to slide along the axial direction of the lathe. The arrangement of the slide groove is consistent with the axial direction of the lathe, so that the fixed plate 305 can maintain the accuracy consistent with the axial direction of the lathe during the sliding process, and avoid errors during the adjustment process. The fixed plate 305 is connected to the positioning plate 302 through the slide groove, so that the fixed plate 305 can slide in the axial direction of the lathe. This design allows the carbon brush holder assembly 2 to be adjusted in the axial direction of the lathe according to the size of different workpieces 104, thereby optimizing the effect of the contact between the carbon brush block 209 and the workpiece 104, and ensuring the stability and efficiency of the electric pulse conduction. This slide groove design makes the positioning assembly 3 more flexible, can adapt to the needs of workpieces 104 of different sizes, ensures that the carbon brush holder assembly 2 can be accurately positioned during the processing, and avoids uneven current transmission due to improper adjustment, thereby improving the processing accuracy and surface quality.

[0032] The fixing plate 305 is a U-shaped plate. The side plates on both sides of the fixing plate 305 are respectively located on both sides of the positioning plate 302, and hexagon socket head cap screws (M4) 306 are installed on the side plates, and the inner ends of the screws abut against the side surface of the positioning plate 302.

[0033] The fixing plate 305 is designed as a U-shaped plate, and its two side plates are symmetrically distributed on both sides of the positioning plate 302. This shape design enhances the structural strength of the fixing plate 305, and at the same time provides additional lateral support during the processing, ensuring a more stable sliding connection between the positioning plate 302 and the fixing plate 305. When the screws are tightened, the wobbling or misalignment between the positioning plate 302 and the fixing plate 305 is restricted, providing a reliable lateral binding force during the processing.

[0034] The bottom of the positioning assembly 3 has a mounting plate, the connecting frame 202 is installed at the bottom of the mounting plate, the bottom of the screw passing through the fixing plate 305 and the positioning plate 302 is connected to the mounting plate, and an insulating plate 303 is provided between the upper side of the mounting plate and the positioning plate 302.

[0035] The mounting plate at the bottom of the positioning assembly 3 is mainly used to fix and install the connecting frame 202. The mounting plate is directly installed at the bottom of the positioning assembly 3 and is connected to the fixing plate 305 and the positioning plate 302 by screws, forming a firm support structure. The insulating plate 303 prevents the electric pulse current from being conducted to the lathe protective cover 101 through the positioning plate 302, effectively blocking the leakage path of the pulse current, thereby protecting the equipment.

[0036] Hexagon socket head cap screws (M8) 304 are installed at both ends of the mounting plate. Round holes are provided at both ends of the connecting frame 202. The screws at both ends of the mounting plate pass through the round holes of the connecting frame 202, and nuts are installed at the bottoms of the screws. This method of fixing by passing the screws through the holes not only facilitates the quick installation and disassembly of the connecting frame 202, but also can fine-tune the height of the connecting frame 202 by adjustment, so as to ensure good contact between the carbon brush block 209 and the chuck of the workpiece 104, ensuring the convenience of installation and adjustment. At the same time, it greatly improves the adaptability of the device and ensures the contact effect with the chuck.

[0037] The two ends of the connecting frame 202 are also provided with wiring bolts, and the end of the power wire has a plug 201, and the plug 201 is installed on the wiring bolts at both ends of the connecting frame 202. Wiring bolts are set at both ends of the connecting frame 202 for connecting the electric pulse power wire. The design of the bolts facilitates the rapid installation and firm connection of the power wire, and can effectively avoid the current interruption problem caused by the wire falling off. The end of the power wire is equipped with a plug 201, and the plug 201 is fixed to the two ends of the connecting frame 202 by wiring bolts, which facilitates the rapid connection and disconnection of the power supply of the device and improves the safety of the device. By arranging wiring bolts and plugs 201 at both ends of the connecting frame 202, the power connection is more stable and reliable, and at the same time provides higher operational flexibility. When the user replaces the power supply or adjusts the device, the installation or removal of the wire can be completed quickly, which improves the use efficiency of the device.

[0038] A fixing seat 203 is installed on the middle bottom side of the connecting frame 202, and the carbon brush block 209 is installed on the fixing seat 203 through a carbon brush arm 207. The carbon brush arm 207 is a plate structure. The top of the carbon brush arm 207 is connected to the fixing seat 203 through a hexagonal bolt and a nut (M5) 204, and the bottom of the carbon brush arm 207 is connected to the carbon brush block 209 through bolts.

[0039] The power plug 201 is fixed to the connecting frame 202 by hexagonal bolts and nuts (M16) 205. The connecting frame 202 is in direct contact with the fixing seat 203 and fixed by hexagonal bolts. An insulating gasket 206 is used under the hexagonal bolts. The fixing seat is connected to the carbon brush arm 207 by bolts, and the carbon brush arm 207 is fixed to the carbon brush block 209 by hexagonal bolts at the bottom, and two additional copper seats 210 are used on both sides of the carbon brush block for screws 208. The stable connection between the fixing seat 203 and the carbon brush arm 207 ensures the stability of current conduction during the processing.

[0040] The connecting frame 202 and the fixing seat 203 are both made of copper, because copper has good electrical conductivity and corrosion resistance, can effectively reduce resistance, ensure the stable transmission of electric pulse current, and extend the service life of the device. By choosing copper as the main material of the conductive component, the conductive efficiency of the device can be significantly improved, while avoiding the heating problem caused by excessive resistance, ensuring the stability and safety of the equipment.

[0041] During use, the two carbon brush holder assemblies 2 of the device can be adjusted in lateral distance according to the actual size of the workpiece and then connected to the sheet metal protective cover 101 of the lathe through the positioning plate 302. The positioning plate 302 and the sheet metal protective cover 101 of the lathe are connected by bolts, which is convenient and flexible to use and easy to disassemble, thereby improving the flexibility and practicality of the device.

[0042] The carbon brush arm 207 of the carbon brush holder assembly is connected to the copper fixing seat 203 by bolts, and no spring is used as a pressure compensation mechanism. When the carbon brush arm is connected to the fixing seat by a spring, the carbon brush arm uses the pressure of the spring to clamp the head chuck of the lathe. However, in the actual turning and rolling process, when the spindle speed is too high, it may cause the carbon brush holder to vibrate, resulting in poor contact and unstable pulse current. Therefore, the carbon brush holder assembly of the present device does not use spring pressure clamping, but uses a carbon brush arm 207 of a certain size and an arc-shaped carbon brush block 209 to make the carbon brush block contact with the head chuck 105 and the tail chuck 103 in a radial position, and uses gravity to make the carbon brush block 209 close to the chuck to maintain normal contact. Because the contact area is large enough, heat and sparks caused by current can be avoided, thereby reducing friction and vibration.

[0043] In order to ensure that the pulse current will not damage the original lathe equipment during the processing, certain insulation treatments are performed on three parts of the lathe, including the insulation treatment of the lathe tool holder, so that the cutting tool and rolling tool are insulated and connected to the lathe bed. Different insulation treatment methods are used for different turning tools. The specific method for the insulation treatment of ordinary turning tools is to add a bakelite board between the tool holder and the bed, put an insulating rubber sleeve on the connecting bolt, and then use the connecting bolt to pass through the bakelite board to fix the tool holder on the small slide of the lathe. This not only minimizes the change of the original tool holder structure, but also ensures the insulation effect. This connection has good rigidity and will not affect the subsequent processing accuracy. For the rolling turning tool, its tool head is a tool head made of ceramic / tungsten material, which is an insulating material, and it uses oil pressure to press the tool head on the surface of the workpiece. Oil is a non-conductive liquid. Therefore, for the rolling turning tool, there is no need to insulate the tool holder.

[0044] In the clamping area of ​​the original three-jaw chuck of the lathe, that is, the spindle chuck 106 and the head chuck 105, wrap the handle of the head chuck 105 with insulating tape and then install the insulating sleeve, and cover the contact area of ​​the original spindle chuck 106 and the head chuck 105 with insulating tape to achieve complete insulation. During use, replace the insulating tape and insulating sleeve on the head chuck in time to avoid leakage due to damage and thus damage to the lathe equipment.

[0045] The design of the insulation structure of the clamping device and the negative pole of the pulse power supply for the tailstock end is as follows: because the original tailstock top and the workpiece contact area are very small, the excessive current density after the workpiece applies the electric pulse in the processing process can cause the temperature here to rise sharply, thereby causing the contact strength to decline, affecting the processing accuracy, and causing the rapid wear of the top. In the present embodiment, the original tailstock top is replaced by the tapered handle small chuck, i.e., the tail chuck 103, and the three claws of the small chuck are used for the current path of the electric pulse, and the tapered handle of the small chuck is connected with the tailstock sleeve with the insulation of the heat shrink tube sleeve of 0.1mm thick. Such design can ensure that the circuit is unblocked, does not produce local high temperature, and can also ensure the insulation, rigidity and precision of the tailstock end connection. It should be noted that the center line of the tailstock top must overlap with the lathe spindle, otherwise the workpiece surface will produce taper during turning.

[0046] Example 2

[0047] This embodiment provides a processing method of the above-mentioned lathe-based electric pulse processing device, including:

[0048] Installation steps:

[0049] 1. The head chuck 105 is mounted on the spindle chuck 106 of the lathe, and the tail chuck 103 is mounted on the tailstock 102 of the lathe.

[0050] 2. The workpiece 104 is installed between the head chuck 105 and the tail chuck 103.

[0051] 3. The positioning assembly 3 is installed on the lower side of the protective cover 101 , and the carbon brush holder assembly 2 is installed on the lower side of the positioning assembly 3 .

[0052] Adjustment steps:

[0053] The position of the fixing plate 305 along the axial direction of the lathe is adjusted so that the two carbon brush blocks 209 are in contact with the head chuck 105 and the tail chuck 103 respectively.

[0054] Processing steps:

[0055] 1. Connect the pulse power supply to the connecting frame 202, and the positive current is connected to the head chuck 105 through the connecting frame 202 and the carbon brush block 209.

[0056] 2. The pulse current flows through the workpiece 104 to the tail chuck 103, and then returns to the negative pole of the power supply through the carbon brush block 209 and the connecting frame 202 on the tail chuck 103.

[0057] 3. Through the action of electric pulses, the processing performance of the workpiece 104 is improved, work hardening is reduced, and the surface quality is improved.

[0058] This processing method combines the structural characteristics and functional advantages of the device, and can achieve efficient and stable electric pulse processing, which is particularly suitable for plastic deformation processing of difficult-to-process materials.

[0059] Specifically:

[0060] The carbon brush holder assembly 2 and the positioning assembly 3 are connected to the sheet metal protective cover 101 of the lathe. After the pulse power supply is turned on, the positive current passes through the pulse power supply wire and the plug 201 through the connecting frame 202, and then the current flows through the fixed seat 203, and then through the carbon brush arm 207, the current passes through the carbon brush block 209 and is connected to the head chuck 105, which constitutes the positive pole of the current. Because the head chuck and the original three-jaw chuck of the lathe are insulated by insulating rubber sleeves and insulating tape, the pulse current can only flow through the workpiece to reach the tapered handle tail chuck 103, and the contact between the tail chuck 103 and the tailstock is also insulated. The current passes through the carbon brush block 209, then through the carbon brush arm 207 to the fixed seat 203 and the connecting frame 202, and finally reaches the power plug 201 to form the negative pole of the power supply, realizing electric pulse processing during the processing process.

[0061] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. An electric pulse processing device based on a lathe, characterized in that: Comprising: A lathe structure, a positioning component, and a carbon brush holder component; The lathe structure includes a headstock chuck and a tailstock chuck. The headstock chuck is insulated and installed on the spindle chuck of the lathe, and the tailstock chuck is insulated and installed on the tailstock of the lathe; The positioning component includes a positioning plate and a fixing plate. The positioning plate is insulated and installed on the protective cover of the lathe, and the fixing plate is slidably connected to the positioning plate along the axial direction of the lathe; The carbon brush holder component includes a connecting frame and a carbon brush block. The connecting frame is installed on the lower side of the fixing plate and can be lifted relative to the fixing plate. The connecting frame is externally connected to a power source. The carbon brush block is installed on the lower side of the connecting frame, and the bottom of the carbon brush block is an arc surface, and the arc surface is pressed against the headstock chuck or the tailstock chuck.

2. The electric pulse processing device based on a lathe as claimed in claim 1, characterized in that: The protective cover has a top plate. The positioning plate is installed on the lower side of the top plate of the protective cover through bolts and screws, and a cushion plate is provided between the positioning plate and the protective cover, and the thickness of the cushion plate is greater than the thickness of the fixing plate located on the upper side of the positioning plate.

3. The electric pulse processing device based on a lathe as claimed in claim 1, characterized in that: A chute is provided on the positioning plate, and the chute is arranged along the axial direction of the lathe. The fixing plate has an opening groove, and a bolt is installed in the opening groove. The bolt passes through the chute of the positioning plate and can slide in the chute.

4. The lathe-based electric pulse processing device according to claim 3, characterized in that: The fixing plate is a U-shaped plate. The side plates on both sides of the fixing plate are respectively located on both sides of the positioning plate, and bolts are installed on the side plates, and the inner ends of the bolts abut against the side surface of the positioning plate.

5. The lathe-based electric pulse processing device according to claim 3, characterized in that: The bottom of the positioning component has a mounting plate. The connecting frame is installed at the bottom of the mounting plate. The bottom of the bolt passing through the fixing plate and the positioning plate is connected to the mounting plate, and an insulating plate is provided between the upper side of the mounting plate and the positioning plate.

6. The electric pulse processing device based on a lathe as claimed in claim 5, characterized in that: Bolts are installed at both ends of the mounting plate. Circular holes are provided at both ends of the connecting frame. The bolts at both ends of the mounting plate pass through the circular holes of the connecting frame, and nuts are installed at the bottoms of the bolts.

7. The lathe-based electric pulse processing device according to claim 6, characterized in that: Wiring bolts are also provided at both ends of the connecting frame. The end of the power supply wire has a plug, and the plug is installed on the wiring bolts at both ends of the connecting frame.

8. The lathe-based electric pulse processing device according to claim 1, characterized in that: A fixing seat is installed on the middle bottom side of the connecting frame. The carbon brush block is installed on the fixing seat through a carbon brush arm. The carbon brush arm is a plate structure. The top of the carbon brush arm is connected to the fixing seat through a bolt, and the bottom of the carbon brush arm is connected to the carbon brush block through a bolt.

9. The lathe-based electric pulse processing device according to claim 8, characterized in that: Both the connecting frame and the fixing seat are made of copper.

10. A processing method based on a lathe electric pulse processing device according to any one of claims 1 to 9, characterized in that: Comprising: The headstock chuck is installed on the spindle chuck of the lathe, the tailstock chuck is installed on the tailstock of the lathe, and the workpiece is installed between the headstock chuck and the tailstock chuck; The positioning component is installed on the lower side of the protective cover, the carbon brush holder component is installed on the lower side of the positioning component, and the position of the fixing plate along the axial direction of the lathe is adjusted so that the two carbon brush blocks are respectively in contact with the headstock chuck and the tailstock chuck; A pulsed power supply is connected to the connecting frame. The positive current passes through the connecting frame and the carbon brush block and is connected to the headstock chuck. The pulsed current flows through the workpiece and reaches the tailstock chuck, and then the current passes through the carbon brush block and the connecting frame and finally reaches the power source to form the negative pole of the power source, realizing the electro-pulse treatment during the processing.

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