Cutting device for machining mechanical parts and machining machine tool

Abstract

The invention discloses a cutting device for machining mechanical parts and a machining tool, and relates to the technical field of pipe cutting. The cutting device comprises a supporting assembly, an electrifying assembly, a cutting assembly and a burr removing assembly. The supporting assembly is used for clamping and fixing a pipe. The electrifying assembly is conductive through the cooperation of the fixing ring and the rotating sleeve; a rotating sleeve driving motor of the cutting assembly drives a rotating sleeve to rotate, a push rod motor drives a cutter to cut along the outer surface of the pipe, and burrs extend towards the inner ring of the pipe; and a feeding rotating rod of the burr removing assembly drives an elastic polishing piece to remove burrs. According to the device, burr generation and subsequent treatment are reduced, the production efficiency and the product assembly precision are improved, the device has wide applicability, and the labor cost and the energy consumption can be reduced.

Description

Technical Field

[0001] The invention relates to pipe cutting, and in particular to a cutting device and a processing machine tool for machining mechanical parts. Background Art

[0002] In the process of cutting pipes, traditional cutting methods often leave uneven burrs on the outer and inner edges of the cut surface of the pipe. The presence of these burrs not only reduces the assembly accuracy of the product, but also brings inconvenience to personnel handling. In addition, when the pipe is cut multiple times, each cut will produce two new cut surfaces, and burrs will also form on these two cut surfaces. Therefore, after the cutting process is completed, the burrs on these two cut surfaces need to be additionally processed. This treatment not only increases the production and processing time, but also reduces the overall production efficiency. Summary of the invention

[0003] The present invention provides a cutting device for machining mechanical parts. The cutting knife cuts along the outer surface of the pipe through an outside-in cutting method, thereby ensuring that the burrs extend to the inner ring of the pipe rather than the outer ring. This innovative design effectively reduces the burr generation on the outer ring of the pipe, avoids the impact of burrs on the outer ring of the pipe in the traditional cutting method, and reduces the subsequent secondary burr treatment. The specific scheme is as follows:

[0004] A cutting device for machining mechanical parts, the cutting device is used to cut pipes, and the cutting device includes:

[0005] A support assembly, used for clamping and fixing the pipe;

[0006] A power-on component, the power-on component includes a fixed ring and a rotating sleeve, a plurality of conductive ring grooves are provided on the inner ring side wall of the fixed ring, conductive springs are provided in the conductive ring grooves or filled with liquid conductive medium, an external electrode electrically connected to the conductive springs or liquid conductive medium in each conductive ring groove is provided on the outer surface of the fixed ring, the external electrodes are insulated from each other and from the fixed ring, the rotating sleeve is rotatably arranged in the inner ring of the fixed ring, a plurality of electrode rings respectively embedded in the conductive ring grooves are provided on the outer wall of the rotating sleeve, the electrode rings are electrically and slidably connected to the conductive springs or liquid conductive medium, and the pipe is coaxially arranged in the rotating sleeve;

[0007] The cutting assembly includes a rotating sleeve driving motor, a push rod motor and a cutting knife. The rotating sleeve driving motor is connected to the rotating sleeve for driving the rotating sleeve to rotate. The push rod motors are distributed in a circular array on the inner wall of the rotating sleeve. The push rod motors are connected to each electrode ring through a plurality of wires. The push rod motor is provided with a push rod located in the radial direction of the rotating sleeve. The end of the push rod is provided with a cutting knife acting on the outer surface of the pipe.

[0008] The burr removal component includes a feeding and rotating rod and elastic grinding pieces distributed along the length direction of the feeding and rotating rod, and the feeding and rotating rod is installed on the feeding driver.

[0009] Furthermore, the support component includes two support mechanisms respectively used for fixing both ends of the pipe. The two support mechanisms are located at both ends of the energizing component. The support mechanism includes:

[0010] The support plate is fixed to one side of the base, and the vertical plate is connected to the top of the support plate;

[0011] The placing table, with a semicircular opening facing upwards, is arranged at the top of the vertical plate, and ear plates are fixed at both ends of the placing table;

[0012] The gantry limit plate, the two ends of the bottom of the gantry limit plate are fixedly connected to the ear plates, and limit strips are arranged on both inner sides of the gantry limit plate;

[0013] The upper pressing plate, with a semicircular opening facing downwards, slides up and down inside the gantry limit plate. Limit grooves that are slidably matched with the limit strips are arranged on both sides of the upper pressing plate, and a fixed sleeve is arranged at the top of the upper pressing plate;

[0014] The adjusting screw passes through and is threadedly connected to the top plate of the gantry limit plate, and the bottom of the adjusting screw is inserted into the fixed sleeve.

[0015] Furthermore, the liquid conductive medium is a gallium-indium-tin alloy.

[0016] Furthermore, at least one limiting ring groove is formed on the inner side wall of the inner ring of the fixed ring;

[0017] At least one limiting ring that is embedded in the limiting ring groove is arranged on the outer surface of the rotating sleeve.

[0018] Furthermore, the rotating sleeve is a hard plastic circular ring with a plurality of electrode rings spacedly inlaid on its outer surface; or

[0019] The rotating sleeve is a metal circular ring, and insulating plastics are arranged between the rotating sleeve and the plurality of electrode rings.

[0020] Furthermore, a gear is fixed to one end of the rotating sleeve;

[0021] A driving gear that meshes with the gear is installed on the output shaft of the rotating sleeve driving motor.

[0022] Furthermore, positioning steps that cooperate with each other are provided at the end of the push rod and the cutting knife,

[0023] Threaded holes and through holes are respectively provided at the end of the push rod and the cutting knife, and the fastening screw passes through the through hole and is threadedly connected to the push rod to fix the cutting knife on the push rod.

[0024] Furthermore, a plurality of elastic grinding pieces are spirally distributed along the length direction of the feeding and rotating rod, and the front and rear ends of the elastic grinding pieces are fixed to the feeding and rotating rod;

[0025] The elastic grinding member is provided with a plurality of cutting grooves that are consistent with the length direction of the feeding and rotating rod, and the cutting grooves divide the elastic grinding member into a plurality of sandpaper grinding strips with elastic deformation.

[0026] A processing machine tool using the above-mentioned cutting device.

[0027] The advantages of the present invention are as follows:

[0028] 1. Reducing burr generation and subsequent processing: By adopting the circumferential cutting method from the outside to the inside, the device can make the burrs on the cross-section of the pipe extend towards the inner ring of the pipe after cutting, thus reducing the burr generation at the outer ring edge. As a result, the subsequent burr processing process is reduced. Especially in the removal of burrs on the outer ring surface, the influence of burrs on the outer ring of the pipe caused by traditional cutting is avoided. According to the experimental results, the workload of burr removal can be reduced by about 30%-50%.

[0029] 2. Improving production efficiency: Since the generation of burrs and subsequent secondary processing are reduced, the overall production efficiency has been significantly improved. The traditional cutting method requires multiple processing steps, including cutting, deburring, etc., while this device can achieve one-stop processing by integrating cutting and deburring functions, avoiding unnecessary downtime and saving working hours. In practical applications, the production efficiency has increased by about 20%-40%. Especially in large-scale production, a large amount of time cost is saved.

[0030] 3. Improving the assembly accuracy of products: The burrs caused by traditional cutting will lead to inaccurate assembly of products, while this device reduces the generation of burrs and significantly improves the accuracy of the pipe after cutting. The effect of burr removal directly improves the assembly quality of products, reduces the assembly errors caused by burrs, and improves the quality of the final product. Especially in precision machinery assembly, the accuracy has been improved by about 10%-15%.

[0031] 4. Wide applicability: The burr removal component in the present invention adopts a grinding member with elastic deformation characteristics, which can adapt to pipes of different sizes, and can grind the inner wall and inner ring edge of the pipe through sandpaper to effectively remove the burrs on the inner ring edge. This design significantly improves the applicable range of the equipment. Especially in a production line with a wide variety of pipe types, it can be flexibly adjusted to meet the processing requirements of different pipe specifications, reducing the equipment adjustment and replacement time and lowering the production cost.

[0032] 5. Reduction of labor costs and intensity: Due to the high degree of automation of the present invention, burr removal can be directly carried out during the cutting process. Operators only need to perform simple operations and monitoring, greatly reducing the complexity and labor intensity of manual participation. In traditional methods, manual burr removal takes a lot of time, while the present invention reduces the dependence on manual labor through automated processing, improving the work efficiency and comfort of workers. Especially in large-scale production, the labor cost is reduced by about 15%-25%.

[0033] 6. Energy conservation and environmental protection: The design of the present invention is more efficient than traditional cutting and deburring equipment, reducing unnecessary process steps and energy consumption. By effectively integrating the cutting and deburring functions, the running time of the equipment is reduced, the energy consumption is lowered, and the energy use efficiency is improved, further achieving the effect of energy conservation. It is estimated that during use, the energy consumption can be reduced by about 10%-20%. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

[0035] Figure 1 It is a three-dimensional schematic diagram of a cutting device for machining mechanical parts of the present invention;

[0036] Figure 2 It is an exploded view of the structure of the cutting device of the present invention;

[0037] Figure 3 For Figure 1 axial sectional view.

[0038] Figure 4 It is a schematic diagram of the structure of the cutting assembly; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some well-known technical features in the art are not described.

[0040] In order to thoroughly understand the present invention, detailed steps and structures will be presented in the following description to explain the technical solutions of the present invention. The preferred embodiments of the present invention are described in detail as follows. However, in addition to these detailed descriptions, the present invention can also have other embodiments.

[0041] Reference Figures 1-3 As shown, the present invention provides a cutting device for machining mechanical parts. The cutting device is used for cutting a pipe 504, and the cutting device includes a base 1, a power-on component 2, a cutting component 3, a burr removal component 4, and a support component 5.

[0042] Support component 5

[0043] The support component 5 is used for clamping and fixing the pipe 504. The support component 5 includes two groups of support mechanisms respectively located at both ends of the power-on component 2 to provide fixation for both ends of the pipe 504. It should be noted that for simplicity of drawing, only one group of support mechanisms is shown in the attached drawings, but in practice, two groups should be configured to ensure support stability.

[0044] Each support mechanism includes a support plate 501, the support plate 501 is fixed to one side of the base 1, and a vertical plate 502 is connected to the top of the support plate 501. A placement table 503 with a semi-circular opening facing upwards is fixed to the top of the vertical plate 502, and ear plates 6 are fixed to both ends of the placement table 503.

[0045] A gantry limit plate 7 is fixed to the top of the placement table 503. The two ends of the bottom of the gantry limit plate 7 are fixedly connected to the ear plates 6. Limit strips 9 are provided on both inner sides of the bottom of the gantry limit plate 7. The top plate 8 of the gantry limit plate 7 is provided with threaded holes and a regulating screw 12 is threadedly installed.

[0046] A semi-circular upper pressing plate 10 with an opening facing downwards is slidably installed up and down within the gantry limit plate 7. Limiting grooves 11 that are slidably engaged with the limit strips 9 are provided on both sides of the upper pressing plate 10. A fixed sleeve is provided on the top of the upper pressing plate 10, and the bottom of the regulating screw 12 is inserted into the fixed sleeve, and the upper pressing plate 10 is driven to press down by rotating the regulating screw 12.

[0047] Through the combined use of the regulating screw 12 and the upper pressing plate 10, automatic clamping and fixing of the pipe are achieved, ensuring the stability of the pipe's position during cutting and burr removal, thereby improving the cutting accuracy and burr removal effect.

[0048] The operation process of the support component for clamping a workpiece is as follows:

[0049] 1) Pipe positioning: Place the pipe 504 in the semi-circular groove of the placement table 503 (the radius matches the outer diameter of the pipe), and ensure that the axis of the pipe coincides with the axis of the rotating sleeve 203. The placement table 503 is made of nylon material with a surface roughness Ra ≤ 1.6 μm to avoid scratching the outer surface of the pipe.

[0050] 2) Clamping and fixing: Rotate the adjusting screw 12 to drive the upper pressing plate 10 to move downward along the limiting strip 9. A rubber pad is embedded in the semicircular groove of the upper pressing plate 10. When applying the clamping force, the rubber pad undergoes elastic deformation to form a uniform pressure on the outer surface of the pipe. The limiting strip 9 cooperates with the limiting groove 11 to ensure that the upper pressing plate 10 moves vertically and avoid tilting.

[0051] Power-on component 2

[0052] As Figures 2-4 shown, the power-on component 2 is provided with a fixing ring 201 and a rotating sleeve 203. A plurality of conductive ring grooves 202 are formed on the inner side wall of the inner ring of the fixing ring 201. Liquid conductive medium is filled in the conductive ring grooves 202. An external electrode 206 electrically connected to the liquid conductive medium in each conductive ring groove 202 is provided on the outer surface of the fixing ring 201. The external electrodes 206 are insulated from each other and from the fixing ring 201.

[0053] The rotating sleeve 203 is rotatably arranged inside the inner ring of the fixing ring 201. An electrode ring 205 that is embedded in the conductive ring groove 202 is provided on the outer wall of the rotating sleeve 203. The electrode ring 205 is in sliding contact with the liquid conductive medium in an electrically connected manner. An electrode ring 205 is connected to the outer ring of the rotating sleeve 203. Cooperating with the liquid conductive medium in the conductive ring groove 202 of the inner ring of the fixing ring 201, the external power supply is transmitted to the cutting mechanism of the cutting component 3 through the electrode ring 205.

[0054] In an alternative embodiment, the liquid conductive medium is a gallium-indium-tin alloy. The melting point of the gallium-indium-tin alloy is about 15°C and it is liquid at room temperature. Its conductivity is 3.4×10 6 S / m, with both high conductivity and low evaporation. After filling the liquid conductive medium, the immersion depth of the electrode ring 205 ≥ 1.5 mm to ensure electrical continuity during sliding contact.

[0055] The external electrode 206 is encapsulated with epoxy resin and is insulated from the fixing ring 201. The distance between adjacent external electrodes 206 ≥ 20 mm to avoid short circuit.

[0056] In an alternative embodiment, at least one limiting ring groove is formed on the inner side wall of the inner ring of the fixing ring 201; at least one limiting ring 204 that is respectively embedded in the limiting ring groove is provided on the outer surface of the rotating sleeve 203. The setting of the limiting ring 204 ensures the stable rotation of the rotating sleeve 203 inside the fixing ring 201, and at the same time prevents the axial movement of the rotating sleeve 203, further enhancing the stability and reliability of the device. Lubricating paste can be provided in the limiting ring groove to reduce the friction between the rotating sleeve 203 and the fixing ring 201 and improve the smoothness of rotation. In addition, the cooperation between the limiting ring 204 and the limiting ring groove can also effectively prevent the rotating sleeve 203 from vibrating during high-speed rotation, ensuring the smooth progress of the cutting process.

[0057] In an alternative embodiment, the rotating sleeve 203 is a rigid plastic ring with a plurality of metal electrode rings 205 inlaid at intervals on the outer surface to ensure insulation between the electrode rings 205 and the rotating sleeve 203. The rotating sleeve 203 can be made of POM (polyoxymethylene), and the Rockwell hardness of POM is about M94 - 120, with rigidity close to that of metal and relatively low cost.

[0058] In another embodiment, the rotating sleeve 203 is a metal ring with higher hardness, such as stainless steel, which is wear-resistant and has excellent electrical conductivity. To ensure insulation between the metal ring and the electrode rings 205, insulating plastic, such as PTFE (polytetrafluoroethylene), is provided between the metal ring and the electrode rings 205 to ensure electrical insulation between the electrode rings 205 and with the rotating sleeve 203, while being resistant to high temperatures and having strong chemical stability. The combination of the electrode rings 205 and the liquid conductive medium enables efficient and stable current transmission, reduces contact resistance, and extends the service life.

[0059] Cutting assembly 3

[0060] The cutting assembly 3 includes a rotating sleeve driving motor 305, a push rod motor 301, and a cutting tool 302. The rotating sleeve driving motor 305 is in transmission connection with the rotating sleeve 203 to drive the rotating sleeve 203 to rotate. The push rod motors 301 are annularly and arrayedly distributed on the inner wall of the rotating sleeve 203. The push rod motors 301 are respectively connected to the respective electrode rings 205 through a plurality of wires, and the electrode rings 205 supply power to the push rod motors 301. The communication method can adopt a wireless communication method (such as Bluetooth, 2.4G), or can also achieve wired communication by adding electrode rings 205. The push rod motors 301 are provided with push rods in the radial direction of the rotating sleeve 203, and a cutting tool 302 acting on the outer surface of the pipe 504 is installed at the end of the push rod. The push rod motors 301 drive the push rods to move in the radial direction of the rotating sleeve 203, so that the cutting tool 302 moves radially and acts on the tubular workpiece to perform circumferential cutting.

[0061] A gear 303 is fixed at one end of the rotating sleeve 203, and a driving gear 306 meshing with the gear 303 is installed on the output shaft of the rotating sleeve driving motor 305, and the rotating sleeve 203 is driven to rotate by the rotating sleeve driving motor 305.

[0062] In an alternative embodiment, the cutting tool 302 is detachably installed at the end of the push rod. Matching positioning steps are provided at the end of the push rod and the cutting tool 302. Threaded holes and through holes are respectively provided at the end of the push rod and the cutting tool 302, and a fastening screw passes through the through hole and is threadedly connected to the push rod to fixedly install the cutting tool 302 on the push rod.

[0063] The cutting process of the cutting assembly is as follows:

[0064] 1) Rotation drive: The rotating sleeve drive motor 305 uses a servo motor. It drives the rotating sleeve gear 303 to rotate through the drive gear 306, thereby realizing the uniform rotation of the rotating sleeve 203 and ensuring the stability of the cutting line speed.

[0065] 2) Feed cutting: The push rod motor 301 uses a micro linear motor, and 4 groups are arranged in a circular array and evenly distributed on the inner wall of the rotating sleeve 203. The cutting tool 302 uses a cemented carbide blade and is fixed to the end of the push rod through a positioning step and an M4 fastening screw. During cutting, the push rod motor synchronously drives the blade to feed uniformly along the radial direction of the pipe, with a feed speed of 0.1 - 0.5 mm / s, and the cutting depth is controlled to be 1.2 times the wall thickness of the pipe to ensure a one-time cut-off.

[0066] 3) Tool replacement: Loosen the fastening screw to disassemble the cutting tool 302. After replacing the new cutting tool 302, calibrate the radial position of the blade through a tool aligner, with an error ≤ 0.02 mm.

[0067] Burr removal component 4

[0068] The burr removal component 4 includes a feed rotating rod 401 and elastic grinding members 402 distributed along the length direction of the feed rotating rod 401. The feed rotating rod 401 is installed on a feed driver.

[0069] In an optional embodiment, a plurality of elastic grinding members 402 are spirally distributed along the length direction of the feed rotating rod 401, and the front and rear ends of the elastic grinding members 402 are fixed to the feed rotating rod 401; the elastic grinding members 402 are provided with a number of cutting grooves 403 consistent with the length direction of the feed rotating rod 401, and the elastic grinding members 402 are divided into several sandpaper grinding strips with elastic deformation by the cutting grooves 403.

[0070] The working principle of the burr removal component is as follows:

[0071] 1) The feed driver drives the rotating rod 401 to extend into the pipe, and then the feed driver drives the rotating rod 401 to rotate uniformly. The elastic grinding members 402 generate radial elastic deformation under the action of centrifugal force, generating radial pressure on the inner wall of the pipe. The sandpaper grinding strips contact the inner ring edge of the pipe to remove burrs. The single grinding time is adjusted according to the length of the pipe.

[0072] 2) Sandpaper replacement: Both ends of the elastic grinding member 402 are fixed to the feed rotating rod 401 through clamps, and the sandpaper can be quickly disassembled and replaced.

[0073] The cutting device and processing machine tool for machining mechanical parts disclosed by the present invention have the following advantages:

[0074] 1) The support component adopts a double-end clamping structure, and realizes the stable fixation of the pipe through the adjusting screw and the elastic rubber pad, which is suitable for pipes of different specifications and is convenient for model change; the power-on component uses the fixed ring to cooperate with the conductive ring groove of the rotating sleeve, and realizes rotating conduction with gallium indium tin alloy liquid conductive medium or conductive elastic sheet, and the limit ring structure ensures the positioning accuracy of the rotating sleeve;

[0075] 2) The cutting component is linked by the rotating sleeve drive motor and the push rod motor, and drives the cutting knife to cut along the outer surface of the pipe, so that the burrs extend inward to the inner ring, reducing the generation of burrs on the outer ring;

[0076] 3) The spiral elastic grinding part of the burr removal component is designed with cutting grooves, and the sandpaper grinding strip generates radial expansion under the action of centrifugal force, and realizes the automatic grinding of the inner ring burrs through rotary feeding.

[0077] This device reduces the burr treatment amount by about 30%-50% through the cutting process from the outside to the inside. The integrated cutting and deburring functions improve the production efficiency by 20%-40%, the assembly accuracy by 10%-15%, and at the same time reduce the labor cost by 15%-25% and the energy consumption by 10%-20%. It has the advantages of high automation, wide application range, energy conservation and environmental protection, and is suitable for precision pipe processing scenarios such as aerospace and automobile manufacturing.

[0078] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and the equipment and structures not described in detail therein should be understood to be implemented in a common manner in the art; any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above, or modify it into equivalent embodiments with equivalent changes, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. A cutting device for machining mechanical parts, the cutting device is used for cutting pipes, characterized in that: The cutting device includes: A support assembly, used for clamping and fixing the pipe; A power-on component, the power-on component includes a fixed ring and a rotating sleeve, a plurality of conductive ring grooves are provided on the inner ring side wall of the fixed ring, conductive springs are provided in the conductive ring grooves or filled with liquid conductive medium, an external electrode electrically connected to the conductive springs or liquid conductive medium in each conductive ring groove is provided on the outer surface of the fixed ring, the external electrodes are insulated from each other and from the fixed ring, the rotating sleeve is rotatably arranged in the inner ring of the fixed ring, a plurality of electrode rings respectively embedded in the conductive ring grooves are provided on the outer wall of the rotating sleeve, the electrode rings are electrically and slidably connected to the conductive springs or liquid conductive medium, and the pipe is coaxially arranged in the rotating sleeve; The cutting assembly includes a rotating sleeve driving motor, a push rod motor and a cutting knife. The rotating sleeve driving motor is connected to the rotating sleeve for driving the rotating sleeve to rotate. The push rod motors are distributed in a circular array on the inner wall of the rotating sleeve. The push rod motors are connected to each electrode ring through a plurality of wires. The push rod motor is provided with a push rod located in the radial direction of the rotating sleeve. A cutting knife acting on the outer surface of the pipe is installed at the end of the push rod. The burr removal component comprises a feed rotating rod and elastic grinding parts distributed along the length direction of the feed rotating rod. The feed rotating rod is installed on a feed driver.

2. A cutting device for machining mechanical parts according to claim 1, characterized in that: The support assembly includes two sets of support mechanisms for fixing the two ends of the pipe, and the two sets of support mechanisms are located at the two ends of the power-on assembly, and the support mechanisms include: A support plate is fixed to one side of the base, and the top of the support plate is connected to the vertical plate; A placing table, wherein the placing table with a semicircular opening facing upward is arranged at the top of the vertical board, and ear plates are fixed at both ends of the placing table; Gantry limit plate, the two ends of the bottom of the gantry limit plate are fixedly connected to the ear plates, and limit strips are provided on both sides of the interior of the gantry limit plate; An upper pressing plate, wherein the upper pressing plate with a semicircular opening facing downward slides up and down in the gantry limiting plate, and limiting grooves are provided on both sides of the upper pressing plate to slide with the limiting strip, and a fixing sleeve is provided on the top of the upper pressing plate; An adjusting screw rod passes through and is threadedly connected with the top plate of the gantry limit plate, and the bottom of the adjusting screw rod is inserted into the fixed sleeve.

3. A cutting device for machining mechanical parts according to claim 1, characterized in that: The liquid conductive medium is gallium indium tin alloy.

4. A cutting device for machining mechanical parts according to claim 1, characterized in that: At least one limiting ring groove is formed on the inner ring side wall of the fixing ring; The outer surface of the rotating sleeve is provided with at least one limiting ring respectively embedded in the limiting ring groove.

5. A cutting device for machining mechanical parts according to claim 1, characterized in that: The rotating sleeve is a hard plastic ring with multiple electrode rings inlaid at intervals on the outer surface; or The rotating sleeve is a metal ring, and insulating plastic is arranged between the rotating sleeve and the plurality of electrode rings.

6. A cutting device for machining mechanical parts according to claim 5, characterized in that: A gear is fixed at one end of the rotating sleeve; A driving gear meshing with the gear is installed on the output shaft of the rotary sleeve driving motor.

7. A cutting device for machining mechanical parts according to claim 5, characterized in that: The end of the push rod and the cutting knife are provided with mutually matching positioning steps. The end of the push rod and the cutting knife are respectively provided with a threaded hole and a through hole, and a fastening screw passes through the through hole and is threadedly connected with the push rod to fix the cutting knife on the push rod.

8. A cutting device for machining mechanical parts according to claim 1, characterized in that: A plurality of elastic grinding pieces are spirally distributed in the length direction of the feed rotating rod, and the front and rear ends of the elastic grinding pieces are fixed on the feed rotating rod; The elastic grinding piece is provided with a plurality of cutting grooves which are consistent with the length direction of the feed rotating rod, and the elastic grinding piece is divided into a plurality of elastically deformed sandpaper grinding strips by the cutting grooves.

9. A processing machine tool using the cutting device according to any one of claims 1 to 8.

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