A device for dry electrolytic polishing

Abstract

The present invention discloses a device for dry electrolytic polishing, which includes a power device, a track motion device, a clamping device, a cathode medium device and a frame. The power device, the track motion device and the cathode medium device are all fixed on the frame, the eccentric shaft in the power device is connected to the sealed end of the linear bearing fixture in the track motion device, and the insulator in the clamping device is connected to the open end of the linear bearing fixture in the track motion device. During operation, the clamping device and the cathode conductive cylinder are connected to a DC power supply. The device converts the rotation of the power device into the circumferential translation of the clamping device through the track motion device. The clamping device clamps the workpiece and moves in the cathode medium device, so that the workpiece can fully contact with the solid medium, while eliminating the line layout problem of the DC circuit in the rotational motion. The device has a simple structure, is practical, and is green and environmentally friendly compared to traditional liquid electrolytic polishing.

Description

Technical Field

[0001] The invention relates to a dry electrolytic polishing device with green and environmentally friendly medium, and mainly belongs to the technical field of metal surface treatment. Background Art

[0002] Dry electropolishing is a revolutionary new surface polishing technology. Dry electropolishing can remove roughness peaks from metal surfaces without affecting the shape or overall size of the metal part. The resulting surface finish is shiny, smooth and ultra-clean.

[0003] The Chinese invention patent application "Method for smoothing and polishing metals by ion transport of free solids and solids for implementing the method" (patent number: 201780025853.2) introduces a method for solid ion transport and polishing metals and a solid. In the method, by means of a method for smoothing and polishing metals by ion transport of free solids, and a conductive solid for implementing the method, a component is connected to the positive electrode of a current generator, by means of a fixing element associated with the device, and subjected to friction with particles of the free solid, the free solid having conductivity and included in a container having a gas environment occupying the interstitial space, and it is electrically in contact with the negative electrode (cathode) of the current generator directly through the container or through a ring acting as a cathode. The solid is a particle, which has porosity and affinity to retain an electrolyte liquid below the saturation level, and has conductivity.

[0004] Dry electrolytic polishing does not produce pollutants such as chemical wastewater during operation, and is safer and more environmentally friendly than traditional liquid electrolytic polishing. However, such polishing devices are relatively rare at present. Therefore, it is necessary to invent a high-efficiency polishing device that is simple in structure, practical, and can conduct electricity through sufficient friction contact. Summary of the invention

[0005] The purpose of the present invention is to provide a device for dry electrolytic polishing, which converts the rotation of the motor into the circumferential translation of the workpiece, so that the workpiece can fully contact with the solid medium, while eliminating the difficulty of arranging the wire circuit during rotation. The device is simple in structure, practical, and greener and more environmentally friendly than traditional liquid electrolytic polishing.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a device for dry electrolytic polishing, including a power device, a track motion device, a clamping device, a cathode medium device and a frame. Among them, the power device mainly includes a motor, a coupling, a rotating shaft, a thrust bearing, an eccentric wheel, an eccentric wheel fixing plate, an eccentric shaft, a load-bearing sleeve, and a motor fixing seat, and the load-bearing sleeve is in the shape of a U-shaped plate. The track motion device includes a longitudinal motion device and a transverse motion device, wherein the longitudinal motion device includes a linear bearing fixture, a linear bearing, a guide shaft, and a guide shaft support, and the linear bearing fixture is in the shape of a U-shaped plate; the transverse motion device includes a slide rail seat, a slider, a guide rail, and a guide rail fixing plate. The clamping device includes an insulator, a clamp rod, and a clamping block, and the insulator is in the shape of a U-shaped plate. The cathode medium device includes a working tank and a cathode conductive cylinder.

[0007] In the power device, the motor is installed on the motor fixing seat, the output shaft of the motor is connected to the two ends of the coupling with the rotating shaft through a semicircular flat key, the thrust bearing is installed on the middle step of the rotating shaft through an interference fit, and the lower end of the rotating shaft passes through the circular hole at the lower part of the bearing sleeve plate so that the thrust bearing surface is tightly fitted with the bottom of the bearing sleeve plate. The lower end of the rotating shaft is a threaded end, the eccentric wheel, the eccentric wheel fixing plate and the lower end of the rotating shaft are concentrically matched, the eccentric wheel fixing plate is fixed to the upper part of the eccentric wheel to reduce the influence of the eccentric shaft bending moment, and the threaded end of the eccentric shaft is fixed to the eccentric hole of the eccentric wheel through bolt connection.

[0008] The track motion device is divided into two parts, one of which is the longitudinal motion device. Among them, the linear bearing fixture wraps the linear bearing on both sides and is fixedly connected. The inner hole of the linear bearing matches the shaft hole of the guide shaft, so that the linear bearing can slide freely on the guide shaft, and the stroke is determined by the guide shaft. Then the two ends of the guide shaft are fixed through the guide shaft support holes.

[0009] The second part is the lateral motion device. The lower surface of the rail seat is fixed with the upper surfaces of the two sliders by screws, and the inner surface of the slider is engaged with the two sides of the rail. Under the action of lubricating oil, the slider slides freely, and the stroke is determined by the rail. The lower surface of the rail is fixed with the surface of the rail fixing plate and is installed on the rail fixing plate by screws.

[0010] In the clamping device, the upper end of the clamp rod is a threaded end, and the upper end of the clamp rod is fixed to the sealed end of the insulator by bolts. The upper side of the clamp block is a cylindrical boss, and the lower part is a threaded through hole. The threaded through hole at the lower part of the clamp block is connected with a bolt. The lower end of the clamp rod is a square body with two through holes on its side. The cylindrical boss and bolts on the clamp block cooperate with the through holes of the square body on the clamp rod. The workpiece is clamped and released under the action of the bolts. The clamp rod and the clamp block are made of conductive materials.

[0011] In the cathode dielectric device, the notch faces the motor output shaft, wherein the working groove is made of insulating material, the upper part of the cathode conductive cylinder is a limiting ring, the cathode conductive cylinder is inserted into the working groove and is pressed against the inner wall of the working groove by interference fit, and the notch of the working groove fits with the limiting ring of the cathode conductive cylinder.

[0012] In the device, the motor fixing seat of the power device is fixedly installed on the frame by bolt connection, and the upper part of the bearing sleeve plate of the power device is fixedly installed on the frame by bolt connection. The connection between the power device and the track motion device of the device is completed by the hole-shaft clearance matching between the lower end of the eccentric shaft of the power device and the sealing end of the linear bearing fixture of the longitudinal motion device of the track motion device. Since there will be relative rotation between the shaft and the fixture, lubricating oil is required between the hole and the shaft. The connection of the track motion device of the device is completed by the bottom of the guide shaft support of the longitudinal motion device and the surface of the slide rail seat of the transverse motion device being fitted and fixed by screws. The longitudinal motion device and the transverse motion device are installed perpendicular to each other, so as to realize the translational motion of the circular track of the linear bearing fixture. The guide rail fixing plate of the transverse motion device of the track motion device of the device is installed on the frame by bolt connection. The connection between the clamping device and the track motion device of the device is completed by the insulator opening end of the clamping device and the linear bearing fixture opening end of the longitudinal motion device of the track motion device through a long pin, so as to realize the translational motion of the circular track of the clamping device. The bottom of the working groove of the cathode medium device of the device is fixed on the frame.

[0013] The working steps of a device for dry electrolytic polishing provided by the present invention are as follows:

[0014] Step 1: Take out the cathode dielectric device and add conductive solid electrolyte microspheres to 1 / 2 of the tank depth;

[0015] Step 2: Make the working tank environment acidic by spraying acidic solution to enhance the conductivity;

[0016] Step 3: Take out the clamping device, clamp the workpiece test piece, and then fix the clamping device on the linear bearing fixture through the long pin;

[0017] Step 4: Connect the power transmission line at the anode end to the upper end of the fixture rod, connect the power transmission line at the cathode end to the cathode conductive cylinder, and start the AD DC power generator to energize;

[0018] Step 5: driving the motor, wherein the motor is ensured to operate at an adjustable low speed to meet the surface treatment requirements of workpieces of different materials. It should be noted that, in the working state, the working tank should also be sprayed with an acidic solution from time to time to maintain the acidic environment concentration in the working chamber;

[0019] Step 6: After processing, remove the clamping device, take out the workpiece, and clean the workpiece surface.

[0020] The present invention adopts the above structure and has the following advantages:

[0021] (1) This device converts the rotation of the power device into the translation of the workpiece through the longitudinal motion device and the transverse motion device in the track motion device, which is conducive to the full contact between the workpiece and the solid medium, improves the electrolysis efficiency, polishing quality and efficiency, and eliminates the line layout problem of the DC circuit in the rotation motion;

[0022] (2) Compared with the traditional liquid electrolytic polishing technology, the solid electrolytic medium used in this device is green and environmentally friendly, and will not produce waste gas and wastewater during the working process, polluting the environment, etc.;

[0023] (3) This device is suitable for processing parts with complex geometric shapes and fragile parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of the dry electrolytic polishing device of the present invention;

[0025] Figure 2 A schematic diagram of the structure of the track motion device;

[0026] Figure 3 Schematic diagram of the power unit structure;

[0027] Figure 4 A schematic diagram of the structure of the longitudinal motion device;

[0028] Figure 5 A schematic diagram of the structure of the lateral motion device;

[0029] Figure 6 A schematic diagram of the structure of the clamping device;

[0030] Figure 7 Schematic diagram of the structure of the cathode dielectric device.

[0031] Among them, Ⅰ, power device, Ⅱ, track motion device, Ⅲ, clamping device, Ⅳ, cathode medium device, Ⅴ, longitudinal motion device, Ⅵ, transverse motion device, Ⅶ, frame, 1, motor, 2, coupling, 3, rotating shaft, 4, thrust bearing, 5, eccentric wheel fixing plate, 6, eccentric wheel, 7, eccentric shaft, 8, load-bearing sleeve, 9, linear bearing fixture, 10, guide shaft support, 11, guide shaft, 12, linear bearing, 13, slider, 14, slide rail seat, 15, guide rail, 16, guide rail fixing plate, 17, insulator, 18, clamp rod, 19, clamp block, 20, working groove, 21, cathode conductive cylinder, 22, motor fixing seat. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] like Figure 1 As shown, the dry electrolytic polishing device of the present invention includes a power device I, a track motion device II, a clamping device III, a cathode medium device IV and a frame VII. Figure 3 As shown, the power device I mainly includes a motor 1, a coupling 2, a rotating shaft 3, a thrust bearing 4, an eccentric wheel 6, an eccentric wheel fixing plate 5, an eccentric shaft 7, a bearing sleeve 8, and a motor fixing seat 22. The bearing sleeve 22 is in the shape of a U-shaped plate. Figure 2 As shown, the track motion device II includes a longitudinal motion device V and a transverse motion device VI, wherein, as Figure 4 As shown, the longitudinal motion device V includes a linear bearing fixture 9, a linear bearing 12, a guide shaft 11, and a guide shaft support 10. The linear bearing fixture 9 is in the shape of a U-shaped plate; Figure 5 As shown, the lateral motion device VI includes a slide rail seat 14, a slider 13, a guide rail 15, and a guide rail fixing plate 16. Figure 6 As shown, the clamping device III includes an insulator 17, a clamp rod 18, and a clamp block 19. The insulator 17 is in the shape of a U-shaped plate. Figure 7 As shown, the cathode dielectric device IV includes a working tank 20 and a cathode conductive cylinder 21.

[0034] In the power device I, the motor 1 is installed on the motor fixing seat 22, the output shaft of the motor 1 and the rotating shaft 3 are key-matched with the two ends of the coupling 2 through two semicircular flat keys, the thrust bearing 4 is installed on the middle step of the rotating shaft 3 through an interference fit of a Φ12 hole shaft, and the lower end of the rotating shaft 3 passes through the lower circular hole of the bearing sleeve 8 so that the bearing surface of the thrust bearing 4 is tightly fitted with the bottom of the bearing sleeve 8; the lower end of the rotating shaft 3 is a threaded end, the eccentric wheel 6 and the eccentric wheel fixing plate 5 are concentrically matched with the lower end of the rotating shaft 3 and fixed by nuts, the eccentric wheel fixing plate 5 is fixed to the upper part of the eccentric wheel 6 by bolt connection to reduce the influence of the bending moment of the eccentric shaft 7, and the threaded end of the eccentric shaft 7 is fixed to the eccentric hole of the eccentric wheel 6 by bolt connection.

[0035] The track motion device II is divided into two parts, one of which is the longitudinal motion device V. Among them, the linear bearing fixture 9 wraps the linear bearing 12 on both sides and is fixedly connected to the four holes on its side by screws. The inner hole of the linear bearing 12 is matched with the shaft hole of the guide shaft 11, so that the linear bearing 12 can slide freely on the guide shaft 11, and the stroke is determined by the guide shaft 11. Then the two ends of the guide shaft 11 are fixedly supported by the guide shaft support 10Φ10 holes.

[0036] The second part is the lateral motion device VI. Among them, the lower surface of the slide rail seat 14 and the four Φ2 holes on the upper surface of the two sliders are concentrically matched and fixed by screws. The inner surface of the slider 13 is meshed with the two sides of the guide rail 15. Under the action of lubricating oil, the slider 13 slides freely, and the stroke is determined by the guide rail 15. The lower surface of the guide rail 15 and the surface of the guide rail fixing plate 16 are screwed and fixed on the guide rail fixing plate 16 through Φ5 threaded holes. Among them, two components consisting of the slide rail seat 14, the slider 13, and the guide rail 15 are symmetrically installed on the guide rail fixing plate 16.

[0037] In the clamping device III, the upper end of the clamp rod 18 is a threaded end, and the upper end of the clamp rod 18 is fixed to the Φ10 hole at the sealed end of the insulator 17 by bolt connection. The upper side of the clamp block 19 is a cylindrical boss, and the lower part is a threaded through hole. The threaded through hole at the lower part of the clamp block 19 is connected with a bolt. The lower end of the clamp rod 18 is a square body, and its side is two through holes. The cylindrical boss on the clamp block 19 and the bolt pass through the two Φ5 through holes of the square body on the clamp rod 18. The workpiece is clamped and loosened under the action of the bolt. The clamp rod 18 and the clamp block 19 are conductive materials.

[0038] In the cathode dielectric device IV, the notch is directly opposite to the output shaft of the motor 1, wherein the working groove 20 is made of insulating material, the upper part of the cathode conductive cylinder 21 is a limiting ring, the cathode conductive cylinder 21 is inserted into the working groove 20 and is pressed against the inner wall of the working groove 20 by interference fit, and the notch of the working groove 20 is in contact with the lower surface of the limiting ring of the cathode conductive cylinder 21 to support the conductive cylinder 21.

[0039] In the device, the motor fixing seat 22 of the power device I is fixedly installed on the frame VII by bolt connection, and the upper part of the load-bearing sleeve plate 8 of the power device I is fixedly installed on the frame VII by bolt connection. The connection between the power device I and the track motion device II of the device is completed by the hole-shaft clearance matching between the lower end of the eccentric shaft 7 of the power device I and the sealed end of the linear bearing fixture 9 of the longitudinal motion device V of the track motion device II. Since there will be relative rotation between the shaft and the fixture, lubricating oil is required between the hole and the shaft. The connection of the track motion device II of the device is completed by the bottom of the guide shaft support 10 of the longitudinal motion device V and the surface of the slide rail seat 14 of the transverse motion device VI being fitted and fixed by screws. The longitudinal motion device V and the transverse motion device VI are installed perpendicular to each other, thereby realizing the translational motion of the circular track of the linear bearing fixture 9. The guide rail fixing plate 16 of the transverse motion device of the track motion device II of the device is installed on the frame VII by bolt connection. The connection between the clamping device III and the track motion device II of the device is completed by fixing the open end of the insulator 17 of the clamping device III with the open end of the linear bearing fixture 9 of the longitudinal motion device V of the track motion device II through a long pin, thereby realizing the translational motion of the circular track of the clamping device III. The bottom of the working tank 20 of the cathode medium device IV of the device is fixed on the frame VII.

[0040] The working steps of a dry electrolytic polishing device provided by the present invention are as follows:

[0041] Step 1: Take out the cathode medium device IV and add conductive solid electrolyte microspheres to the depth of 1 / 2 of the tank;

[0042] Step 2: Make the working tank environment acidic by spraying acidic solution to enhance the conductivity;

[0043] Step 3: Take out the clamping device III, clamp the workpiece test piece, and then fix the clamping device III on the linear bearing fixture 9 through a long pin;

[0044] Step 4: Connect the power transmission line at the anode end to the upper end of the clamp rod 18, connect the power transmission line at the cathode end to the limiting ring of the cathode conductive cylinder 21, and start the AD DC power generator to energize;

[0045] Step 5: driving the motor 1, wherein the motor is ensured to operate at an adjustable low speed to meet the surface treatment requirements of workpieces of different materials. It should be noted that, in the working state, the working tank 20 should also be sprayed with an acidic solution from time to time to maintain the acidic environment concentration in the working chamber;

[0046] Step 6: After processing is completed, remove the clamping device III, take out the workpiece, and clean the workpiece surface.

Claims

1. A device for dry electrolytic polishing, characterized in that: The device comprises a power device, a track motion device, a clamping device, a cathode medium device and a frame; The power device comprises a motor, a coupling, a rotating shaft, a thrust bearing, an eccentric wheel, an eccentric shaft, an eccentric wheel fixing plate, a bearing sleeve plate, and a motor fixing seat, wherein the bearing sleeve plate is in the shape of a U-shaped plate; the motor is mounted on the motor fixing seat, the output shaft of the motor and the rotating shaft are connected to two ends of the coupling, the thrust bearing is mounted on the rotating shaft, the sealing end of the bearing sleeve plate is in close contact with the bearing surface of the thrust bearing, the lower end of the rotating shaft is a threaded end, the eccentric wheel, the eccentric wheel fixing plate and the lower end of the rotating shaft are coaxially matched, the eccentric wheel fixing plate is fixed to the upper part of the eccentric wheel, and the eccentric shaft is fixed to the eccentric hole of the eccentric wheel; The track motion device includes a longitudinal motion device and a transverse motion device; the longitudinal motion device includes a linear bearing fixture, a linear bearing, a guide shaft, and a guide shaft support, and the linear bearing fixture is in the shape of a U-shaped plate; the transverse motion device includes a slide rail seat, a slider, a guide rail, and a guide rail fixing plate; in the longitudinal motion device, the linear bearing fixture is fixedly connected to the linear bearing, the linear bearing and the guide shaft are clearance-matched, and the two ends of the guide shaft are fixed by the guide shaft support; in the transverse motion device, the slide rail seat surface is fitted and fixed to the upper surface of the slider, the inner surface of the slider is meshed with the two sides of the guide rail, the slider can slide freely on the guide rail, and the guide rail is installed on the guide rail fixing plate; The clamping device comprises an insulator, a clamp rod and a clamp block, wherein the insulator is in the shape of a U-shaped plate; in the clamping device, the upper end of the clamp rod is a threaded end, the upper end of the clamp rod is bolted and fixed to the sealed end of the insulator, the upper side of the clamp block is a cylindrical boss, the lower part is a threaded through hole, the threaded through hole at the lower part of the clamp block is connected with a bolt, the lower end of the clamp rod is a square body, and the side thereof is two through holes, the cylindrical boss and the bolt on the clamp block cooperate with the through hole of the square body on the clamp rod, and the workpiece is clamped and released under the action of the bolt, and the clamp rod and the clamp block are made of conductive material; The cathode dielectric device comprises a working groove and a cathode conductive cylinder; in the cathode dielectric device, the notch of the working groove faces the motor output shaft, the working groove is made of insulating material, the upper part of the cathode conductive cylinder is a limiting ring, the cathode conductive cylinder is inserted into the working groove and is pressed against the inner wall of the working groove by interference fit, and the notch of the working groove is in contact with the limiting ring of the cathode conductive cylinder; The motor fixing seat of the power device is fixedly installed on the frame, and the upper part of the load-bearing sleeve plate of the power device is fixedly installed on the frame; the lower end of the eccentric shaft of the power device is connected with the sealed end of the linear bearing fixture of the longitudinal motion device through clearance fit; the bottom of the guide shaft support of the longitudinal motion device is fitted and fixed with the surface of the slide rail seat of the transverse motion device, and the longitudinal motion device and the transverse motion device are installed perpendicular to each other, so as to realize the translational motion of the circular track of the linear bearing fixture; the guide rail fixing plate of the transverse motion device of the track motion device is fixedly installed on the frame; the open end of the insulator of the clamping device is fixedly connected with the open end of the linear bearing fixture of the longitudinal motion device through a long pin, so as to realize the translational motion of the circular track of the clamping device; the bottom of the working groove of the cathode medium device is fixedly installed on the frame.

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