TWI671151B - Electrochemical grinding device and conductive grinding wheel thereof - Google Patents

Abstract

The invention aims to disclose an electrochemical grinding device and a conductive grinding wheel thereof. The electrochemical grinding device includes a base, a driving module and a conductive grinding wheel. The driving module is arranged on the base, and the conductive grinding wheel is connected to the driving module and It has a circumferential surface, two sides and a plurality of liquid-conducting structures, and the two sides are connected to the circumferential surface. The liquid-conducting structures are respectively located on the sides of the conductive grinding wheel for guiding an electrolyte to the circumferential surface. The electrochemical grinding device of the present invention can perform electrochemical processing and mechanical grinding processing. In addition, the electrolyte is guided to the circumferential surface of the conductive grinding wheel through a liquid conducting structure located on the side of the conductive grinding wheel, and thus is performed on the circumferential surface of the conductive grinding wheel. During the electrochemical processing, the electrolyte can be continuously supplied to the circumferential surface of the conductive grinding wheel, so the situation of lack of electrolyte can be avoided.

Description

Electrochemical grinding device and conductive grinding wheel thereof

The invention relates to a grinding device, in particular to an electrochemical grinding device and its conductive grinding wheel.

Electrochemical grinding (ECG) is a composite electrochemical machining and mechanical force grinding cutting process. Electrochemical machining is used to oxidize the surface of a workpiece to form an oxide film, and mechanical force is used to grind the oxide layer to remove the oxide layer. In order to achieve cutout processing, such electrochemical grinding processing is suitable for processing high hardness, high strength, heat sensitivity, brittleness and other metal materials, such as high-speed steel, stainless steel, titanium alloy, nickel-based alloy and other metals.

In the electrochemical grinding process, the workpiece and the conductive grinding wheel are electrically connected to the anode and the cathode of the power supply respectively to provide power to the workpiece and the conductive grinding wheel, and the electrolyte is transferred to the processing area between the conductive grinding wheel and the workpiece for Electrochemical oxidation reaction, and the surface of the workpiece is oxidized to form an oxide film, and then the oxide film is ground and cut by the abrasive grains of a conductive grinding wheel to remove the oxide film, thereby achieving material transfer processing. However, the conventional electrochemical grinding device is not easy to transfer the electrolyte to the processing area between the conductive grinding wheel and the workpiece, which means that the processing area cannot keep the electrolyte continuously, especially when the electrochemical grinding device is used for deep processing of the workpiece, This will reduce the efficiency and accuracy of electrochemical grinding. Based on the above disadvantages, the present invention provides an electrochemical grinding device, which can improve the disadvantages of the conventional electrochemical grinding device.

An object of the present invention is to provide an electrochemical grinding device and a conductive grinding wheel thereof, which can stably transfer the electrolyte solution to the processing area, and thus avoid the lack of the electrolyte solution during the electrochemical grinding processing.

The invention discloses an electrochemical grinding device, which may include a base, a driving module and a conductive grinding wheel. The driving module is arranged on the base. The conductive grinding wheel is connected to the driving module and has a circumferential surface, two sides and A plurality of liquid-conducting structures, the two sides of which are connected to the circumferential surface, the liquid-conducting structures are located on at least one of the two sides of the conductive grinding wheel, and can continuously guide the electrolyte to the circumferential surface for electrochemical processing.

The invention discloses a conductive grinding wheel, which may include a circumferential surface, two sides, and a plurality of liquid conducting structures. The two sides are connected to the circumferential surface. The liquid conducting structures are located on at least one of the two sides.

In order to make your reviewing members have a better understanding and understanding of the technical features and achieved effects of the present invention, only the examples and the detailed description with cooperation are described below, and the description is as follows:

Please refer to the first diagram, the second diagram, and the third diagram, which are a perspective view, a partial exploded view, and a partial perspective view of an embodiment of an electrochemical grinding device according to the present invention, respectively. The electrochemical grinding apparatus 1 of this embodiment is used to perform composite processing including electrochemical processing and mechanical polishing processing. As shown, the electrochemical grinding apparatus 1 includes a conductive grinding wheel 10. The conductive grinding wheel 10 has a wheel body 100. The wheel body 100 has a circumferential surface 102 and two side surfaces 104 connected to the circumferential surface 102. The circumferential surface 102 is a processing surface of the conductive grinding wheel 10. In one embodiment of the present invention, the conductive grinding wheel 10 has a conductive material and abrasive particles, the abrasive particles are embedded in the conductive material, the conductive material may be iron powder or copper powder, and the abrasive particles may be diamond particles, but the conductive material and abrasive The granules are not limited to the above materials. In this way, in addition to being used as a grinding tool, the conductive grinding wheel 10 can also be used as a cathode for electrochemical processing, which means that the circumferential surface 102 of the conductive grinding wheel 10 can be used as a grinding processing surface and an electrochemical processing surface.

Referring again to the second and third figures, the conductive grinding wheel 10 of the electrochemical grinding device 1 further includes a plurality of liquid conducting structures 11, which are located on both sides 104 of the conductive grinding wheel 10. In another embodiment of the present invention, the liquid conducting structures 11 may be located only on one side 104 of the conductive grinding wheel 10. The liquid-conducting structures 11 include a plurality of liquid-conducting grooves 111 and a plurality of spacers 113, and each of the spacers 113 is located between two adjacent liquid-conducting grooves 111, which indicates that the spacers 113 are respectively used for spacing. The liquid guide grooves 111. Each of the spacers 113 is a protrusion.

Please refer to FIG. 4A together, which is a front view of the first embodiment of the conductive grinding wheel of the present invention. As shown in the figure, the liquid guiding grooves 111 are annularly arranged on the side surface 104 of the conductive grinding wheel 10, and the liquid guiding grooves 111 are arc-shaped grooves and are streamlined. In addition, each of the liquid-conducting grooves 111 has a first end 1111 and a second end 1113. The first end 1111 is located on the side surface 104 of the conductive grinding wheel 10, and is generally located in a central area of the side surface 104 and away from the conductive grinding wheel 10. On the circumferential surface 102, each of the liquid guiding grooves 111 extends from the first end 1111 toward the circumferential surface 102 to the circumferential surface 102, so the second end 1113 is located on the circumferential surface 102. It means that the liquid-conducting structures 11 extend from a position far from the circumferential surface 102 toward the circumferential surface 102 and are used to guide the electrolyte to the circumferential surface 102. In addition, the width of the first end 1111 of the liquid guiding grooves 111 is greater than the width of the second end 1113, and the width of the liquid guiding grooves 111 gradually decreases from the first end 1111 to the second end 1113. That is, the widths of the liquid guide grooves 111 decrease from the central area of the side surface 104 toward the circumferential surface 102.

In another embodiment of the present invention, as shown in FIG. 5A, the width of the first end 1111 of the liquid guiding groove 111 may be equal to the width of the second end 1113. In addition, as shown in FIG. 5B and FIG. 5C, the liquid guiding grooves 111 may be radially or tangentially arranged on the side surface 104 of the conductive grinding wheel 10. However, the shape of the liquid guiding groove 111 can be arbitrarily changed according to the use requirements, and is not limited to the disclosure in the above embodiment. Referring back to FIG. 4A and FIG. 4B, the two side surfaces 104 of the conductive grinding wheel 10 each have a recessed area 1041, which indicates that the thickness of the recessed area 1041 is smaller than the thickness of other positions of the conductive grinding wheel 10. In this embodiment, the side surface 104 is gradually recessed from a position adjacent to the circumferential surface 102 toward the center of the side surface 104 to form a recessed area 1041. The liquid-conducting structures 11 are located in the recessed area 1041, so the liquid-conducting structures 11 are gradually recessed toward the center of the side surface 104 according to the shape of the recessed area 1041. In another embodiment of the present invention, the side surface 104 may not have a recessed area 1041, which indicates that the side surface 104 may be a flat surface.

Please refer to the first figure, the second figure, and the sixth figure together. The sixth figure is a partial exploded view of an embodiment of the electrochemical grinding device of the present invention. As shown in the figure, the electrochemical grinding device 1 further includes a base 20 and a driving module 24. The driving module 24 is disposed on the base 20, and the conductive grinding wheel 10 is connected to the driving module 24. The driving module 24 includes a driver 242 and a transmission shaft 244. The transmission shaft 244 is disposed on the driver 242. The driver 242 drives the transmission shaft 244 to rotate. The conductive grinding wheel 10 is threaded on the transmission shaft 244, so that the transmission shaft 244 can drive the conductive grinding. The wheel 10 rotates.

In addition, the transmission shaft 244 has an abutting portion 2441, and the electrochemical grinding device 1 further includes a bearing structure 21, a clamping member 22, and a fixing member 23. The bearing structure 21 has an abutting member 211 and a bearing member 213. Both the abutting member 211 and the bearing member 213 are disc-shaped and each has a perforation 2111 and 2131. The bearing member 213 is disposed on one side of the abutting member 211. The outer diameter of the bearing member 213 is smaller than the outer diameter of the abutting member 211. It is equal to the inner diameter of the through hole 101 of one of the conductive carrier plates 10. In one embodiment of the present invention, the abutting member 211 and the bearing member 213 may be integrally formed. The transmission shaft 244 passes through the perforations 2111 and 2131 of the abutting member 211 and the bearing member 213. The abutting member 211 abuts against the abutting portion 2441 of the transmission shaft 244. The conductive grinding wheel 10 is sleeved on the bearing member 213 and abuts the abutting member. 211. The clamping member 22 has a perforation 221, and the transmission shaft 244 also passes through the perforation 221 of the clamping member 22. The clamping member 22 abuts against the conductive grinding wheel 10, and thus the conductive grinding wheel 10 is clamped between the abutting member 211 and Between the holding pieces 22. The fixing member 23 also has a perforation 231. The transmission shaft 244 passes through the perforation 231 of the fixing member 23. The fixing member 23 abuts against the clamping member 22 and is fixed to the transmission shaft 244. For example, the fixing member 23 is locked by a bolt 25.于 Transmission shaft 244.

Referring again to the first, second, and third figures, the electrochemical grinding device 1 further includes two electrolyte transport structures 30, which are respectively opposite to the two sides 104 of the conductive grinding wheel 10, and In contrast to a part of the liquid-conducting structure 11, an electrolyte is provided to the liquid-conducting structure 11. In one embodiment of the present invention, if the liquid-conducting structures 11 are located on only one side 104 of the conductive grinding wheel 10, only one electrolyte-conveying structure 30 is required. Please refer to the seventh figure together. As shown in the figure, the electrolyte delivery structure 30 has an input hole 302, a first channel 304, and a plurality of output holes 306. The input hole 302 is located at one end of the electrolyte delivery structure 30, and the input holes 302 and The flow passage 304 communicates. The flow channel 304 is located inside the electrolyte transport structure 30 and communicates with the output holes 306. The output holes 306 are located outside the electrolyte transport structure 30 and are opposite to the liquid guide groove 111 of the liquid guide structure 11 to provide Electrolyte to liquid conducting structure 11. In addition, an input connection piece 308 is provided in the input hole 302, and an electrolyte transfer pipe (not shown) is connected to the input connection piece 308 to input the electrolyte to the input hole 302, and the electrolyte flows through the flow passage 304 to pass from these The output port 306 is sprayed to the liquid guiding structure 11.

Referring again to the first figure, the electrochemical grinding device 1 further includes a mobile module 26 and a power supply module 28. The mobile module 26 is disposed on the base 20, and the workpiece 3 is fixed to the mobile module 26 to drive the workpiece 3 to be displaced relative to the conductive grinding wheel 10, so that the workpiece 3 is positioned on the conductive grinding wheel 10. The cathode and anode of the power supply module 28 are electrically coupled to the conductive grinding wheel 10 and the workpiece 3, respectively. When the electrolyte transfer structure 30 transfers the electrolyte to the liquid guide structure 11 located on the conductive grinding wheel 10, the liquid guide structure 11 guides the electrolyte into Electrochemical machining is performed to the machining area between the circumferential surface 102 of the conductive grinding wheel 10 and the workpiece 3.

When the electrochemical grinding device 1 performs electrochemical grinding on the workpiece 3, the driving module 24 drives the conductive grinding wheel 10 to rotate. The electrolyte transport structure 30 provides an electrolyte to the liquid conducting structure 11 located on the conductive grinding wheel 10. When the conductive grinding wheel 10 rotates, the electrolyte in the liquid guide groove 111 of the liquid guide structure 11 is affected by centrifugal force, and flows continuously in the direction of the circumferential surface 102 of the conductive grinding wheel 10, so that the electrolyte will follow the liquid guide The groove 111 continuously flows to the circumferential surface 102 of the conductive grinding wheel 10, so that the electrolyte is continuously guided to the processing area between the circumferential surface 102 and the workpiece 3. In this way, when the circumferential surface 102 performs electrochemical processing on the workpiece 3, the electrolyte is electrolyzed. The liquid can be continuously supplied to the processing area, and the lack of electrolyte in the processing area can be avoided. In this way, the conductive grinding wheel 10 can stably perform electrochemical processing on the workpiece 3 to oxidize the surface of the workpiece 3 to form an oxide film. The abrasive particles of the conductive grinding wheel 10 are in contact with the surface of the workpiece 3, and the oxide film of the workpiece 3 is removed by mechanical cutting force. In addition, since the width of the first end 1111 of the liquid guide grooves 111 is larger than the width of the second end 1113, and the width of the liquid guide grooves 111 gradually decreases from the first end 1111 to the second end 1113, Therefore, when the electrolyte is transported to the liquid guide groove 111, the fluid pressure of the electrolyte located in the liquid guide groove 111 becomes larger as the width of the liquid guide groove 111 becomes narrower, thereby increasing the electrolyte transfer to the processing area. Flow rate, which can improve the efficiency of transporting the electrolyte.

Please refer to FIG. 8A. When the conductive grinding wheel 10 processes the workpiece 3, the circumferential surface 102 of the conductive grinding wheel 10 performs electrochemical processing on the surface of the workpiece 3, so that the surface of the workpiece 3 becomes an oxide film and a circumferential surface. 102 further grinding and oxidizing mill to achieve the purpose of material removal. Subsequently, the conductive grinding wheel 10 is gradually moved downward to form a groove 31 in the workpiece 3. At first, when the conductive grinding wheel 3 forms the groove 31 in the workpiece 3, there is a distance D1 between the two side surfaces 104 near the circumferential surface 102 and the two side surfaces 314 of the groove 31. As shown in FIG. 8B, the conductive grinding wheel 10 continues to go down, and when the groove 31 is further processed, since the two sides 104 of the conductive grinding wheel 10 have recessed areas 1041, the conductive grinding wheel 10 subsequently enters the groove 31 The distance D2 between the two sides 104 (distant from the two sides 104 of the circumferential surface 102) and the two sides 314 of the groove 31 will be greater than the distance D1, so that the two sides 104 of the conductive grinding wheel 10 that subsequently enter the groove 31 can be avoided The processed grooves 31 are electrochemically processed to avoid affecting accuracy.

Since the electrolyte is continuously transported to the processing area between the circumferential surface 102 of the conductive grinding wheel 10 and the workpiece 3 through the liquid-conducting structure 11 of the conductive grinding wheel 10, when the electrochemical grinding device 1 performs deep processing on the workpiece 3 At this time, the electrolyte can still be continuously transferred to the deep processing area, and the processing area can maintain the state that the electrolyte exists during the processing. Furthermore, since the electrolytic solution can be continuously transferred to the processing area, the conductive grinding wheel 10 can stably perform electrochemical processing on the workpiece 3 to form a uniform oxide film, and can improve the accuracy of the electrochemical grinding process. Referring again to the first and second figures, the electrochemical grinding device 1 of the present invention may further include an outer cover 4 covering a part of the surface of the conductive grinding wheel 10 to shield the electrolyte sprayed by the conductive grinding wheel 10.

Please refer to FIG. 5D, which is a front view of a fifth embodiment of the conductive grinding wheel of the present invention. As shown in the figure, the second end 1113 of the liquid guiding groove 111 is located on the side surface 104 of the conductive grinding wheel 10, and the second end 1113 is adjacent to the circumferential surface 102. A distance D3 is formed between the second end 1113 and the circumferential surface 102. When the electrolytic solution is impacted by the centrifugal force and hits the second end 1113, the electrolytic solution is still transmitted to the circumferential surface 102 due to the centrifugal force. Since the second end 1113 of the liquid guide groove 111 is not located on the circumferential surface 102 of the conductive grinding wheel 10, the circumferential surface 102 does not have a notch but has a complete circular circumference, but has a large grinding area so as to achieve Better processing efficiency. In addition, since the circumferential surface 102 does not have a notch, when the circumferential surface 102 grinds the workpiece 3, the workpiece 3 and the notch can be prevented from colliding with each other, so that the wear of the circumferential surface 102 can be reduced, and the conductive grinding wheel 10 can be improved. Service life.

Please refer to FIG. 9, which is a schematic diagram of another embodiment of the electrochemical grinding device of the present invention. The first ends 1111 of the liquid-conducting grooves 111 in this embodiment are far from the central region of the conductive grinding wheel 10, and the electrolyte conveying structure 30 has an arc shape corresponding to the arc shape of the conductive grinding wheel 10, so that the electrolyte The output holes 306 of the conveying structure 30 respectively correspond to the first end 1111 of the part of the liquid guide groove 111, so that the electrolyte conveying structure 30 can continuously deliver the electrolyte to the first end 1111 of the liquid guide groove 111, and the electrolyte Continuously flowing from the first end 1111 to the second end 1113 in the liquid guide groove 111, the liquid guide groove 111 can be kept filled with the electrolyte as much as possible, so the number of bubbles in the liquid guide groove 111 can be reduced. In order to reduce the number of bubbles transmitted to the work area, and improve the accuracy of electrochemical machining.

Please refer to FIG. 10, which is a schematic diagram of another embodiment of an electrochemical grinding device according to the present invention. The electrochemical grinding device 1 may further include a tank 40 for containing the electrolyte 41, and the workpiece 3 is also fixed to the tank 40 and immersed in the electrolyte 41. When the conductive grinding wheel 10 processes the workpiece 3, the conductive grinding is performed The lower half of the wheel 10 is also located in the tank 40 and immersed in the electrolyte 41. When the conductive grinding wheel 10 rotates, the liquid guide groove 111 will drive the electrolyte 41 toward the groove 31 of the work 3 (as shown in Figure 8B). (Shown) flow, so the electrolyte 41 can be continuously transferred to the deep processing area, and the processing area can be maintained in the state where the electrolyte is continuously present during processing.

In summary, the electrochemical grinding device of the present invention includes a conductive grinding wheel. The conductive grinding wheel has a plurality of liquid conducting structures, and the liquid conducting structures are located on both sides of the conductive grinding wheel. The liquid-conducting structure can continuously guide the electrolyte flow to the circumferential surface of the conductive grinding wheel, so that the electrolyte is continuously supplied to the processing area between the conductive grinding wheel and the workpiece. In this way, the lack of electrolysis in the processing area can be avoided during electrochemical processing Liquid situation.

As can be seen from the above, the present invention has indeed reached a breakthrough structure, with improved invention content, and at the same time, it can achieve industrial applicability and progress. When it complies with the provisions of the Patent Law, a new patent application is filed according to the law. The examiner of the Office granted the legal patent right.

1 Electrochemical grinding device 10 Conductive grinding wheel 100 Wheel body 101 Perforation 102 Circumferential surface 104 Side 1041 Recessed area 11 Liquid guide structure 111 Liquid guide groove 1111 First end 1113 Second end 113 Spacer 20 Base 21 Bearing structure 211 Top piece 2111 Perforation 213 Carrying piece 2131 Perforation 22 Clamping piece 221 Perforation 23 Fixing piece 231 Perforation 24 Drive module 25 Bolt 242 Drive 244 Drive shaft 2441 Abutment on top 26 Mobile module 28 Power supply module 30 Electrolyte delivery structure 302 Input hole 304 runner 306 output hole 308 input connector 40 tank 41 electrolyte 3 work piece 31 groove 314 side 4 cover D1 D2 pitch D3 pitch

First figure: It is a perspective view of an embodiment of an electrochemical grinding device of the present invention; Second figure: It is a partial exploded view of an embodiment of an electrochemical grinding device of the present invention; Third figure: It is the present invention Partial perspective view of one embodiment of the electrochemical grinding device; FIG. 4A is a front view of the first embodiment of the conductive grinding wheel of the electrochemical grinding device of the present invention; FIG. 4B is a fourth A A cross-sectional view in the AA direction shown in the figure; FIG. 5A: It is a front view of the second embodiment of the conductive grinding wheel of the electrochemical grinding device of the present invention; FIG. 5B: It is an electrochemical grinding device of the present invention Front view of the third embodiment of the conductive grinding wheel; FIG. 5C: It is a front view of the fourth embodiment of the conductive grinding wheel of the electrochemical grinding device of the present invention; FIG. D: It is a view of the present invention A front view of the fifth embodiment of the conductive grinding wheel of the electrochemical grinding device; FIG. 6 is a partially exploded view of an embodiment of the electrochemical grinding device of the present invention; FIG. 7 is an electrochemical view of the present invention Electrolyte transportation of grinding device An exploded view of one embodiment of the structure; FIG. 8A is a first schematic view of processing a workpiece by the conductive grinding wheel shown in FIG. 4B; FIG. 8B is a conductive view shown in FIG. 4B A second schematic diagram of a workpiece processed by a grinding wheel; a ninth diagram: a schematic diagram of another embodiment of the electrochemical grinding device of the present invention; and a tenth diagram: another embodiment of the electrochemical grinding device of the present invention Schematic illustration.

Claims (10)

An electrochemical grinding device includes: a base; a driving module disposed on the base; and a conductive grinding wheel connected to the driving module and having a circumferential surface, two sides, and a plurality of liquid conducting grooves And a plurality of spacers, the two sides are connected to the circumferential surface, the liquid guide grooves and the spacers are located on at least one side of the two sides of the conductive grinding wheel, and the spacers are respectively located on the liquid guide grooves Between the slots. The electrochemical grinding device according to item 1 of the patent application range, wherein the liquid conducting grooves extend from a position away from the circumferential surface of the conductive grinding wheel toward the circumferential surface. The electrochemical grinding device according to item 1 of the scope of patent application, wherein each of the liquid-conducting grooves has a first end and a second end, and the first end is located in a central region of the side of the conductive grinding wheel, The second end is far from a central region of the side of the conductive grinding wheel. The electrochemical grinding device according to item 1 of the scope of the patent application, wherein the width of the first end of the liquid-conducting grooves is greater than the width of the second end of the liquid-conducting grooves. The electrochemical grinding device according to item 1 of the scope of patent application, wherein the width of the liquid-conducting grooves gradually increases from the first end of the liquid-conducting grooves to the second end of the liquid-conducting grooves. reduce. The electrochemical grinding device according to item 1 of the scope of patent application, further comprising at least one electrolyte conveying structure, which has an input hole, a first channel and a plurality of output holes. The input hole communicates with the flow channel, and the flow channel is located at The electrolyte transport structure is internally connected to the output holes. The output holes are located on the outer side of the electrolyte transport structure and are opposite to the first ends of the liquid guide grooves. The electrochemical grinding device according to item 1 of the scope of patent application, wherein the side surface of the conductive grinding wheel has a recessed area, the liquid conducting grooves and the spacers are located in the recessed area, and the side surface is adjacent to the conductive surface. The position of the circumferential surface of the grinding wheel is gradually recessed toward the center of the side surface. According to the electrochemical grinding device described in the first item of the patent application scope, it further includes at least one electrolyte transporting structure. Compared to a part of the liquid conducting grooves and the spacers, the electrolyte transporting structure has an input hole, The first channel and a plurality of output holes are connected to the flow channel. The flow channel is located inside the electrolyte transport structure and communicates with the output holes. The output holes are located on the outer side of the electrolyte transport structure and opposite to the part. The fluid guide grooves and the spacers. A conductive grinding wheel includes: a circumferential surface; two sides connected to the circumferential surface; and a plurality of liquid guide grooves and a plurality of spacers located on at least one side of the two sides, and the spacers are respectively located on the sides. Between the drainage channels. The conductive grinding wheel according to item 9 of the scope of the patent application, wherein the liquid-conducting grooves extend from a position away from the circumferential surface toward the circumferential surface, and each of the liquid-conducting grooves has a first end And a second end, the first end is located in a central region of the side, the second end is far from the central region of the side, and the width of the first end of the liquid guiding grooves is larger than that of the liquid guiding grooves The width of the second end, the width of the liquid-conducting grooves gradually decreases from the first end of the liquid-conducting grooves toward the second end of the liquid-conducting grooves, and the side has a recessed area. The liquid guiding groove and the spacers are located in the recessed area, and the side surface is gradually recessed from a position adjacent to the circumferential surface toward a center of the side surface.