Electrochemical machining device

Abstract

The present application relates to an electrolytic machining device. A plurality of discharge electrodes (130) are arranged at equal intervals on a circumference centered on a rotation axis, and are configured to be able to come into contact with or move away from a plurality of blades one-to-one. Each of the plurality of discharge electrodes (130) has an electrode face (131) along a machined face of a corresponding one of the plurality of blades. After each of the plurality of discharge electrodes (130) is moved to the inside in the radial direction of the rotation axis, electrolytic machining is performed in a state in which the electrode face (131) and the machined face are close to and oppose each other by rotation of the rotation axis.

Description

TECHNICAL FIELD

[0001] The present application relates to an electrolytic processing device. BACKGROUND

[0002] As a prior document disclosing a structure of an electrolytic processing device of an impeller, there is Japanese Patent Application Publication No. 1-222820 (Patent Document 1). The electrolytic processing device described in Patent Document 1 is provided with a pair of processing electrodes having a substantially vane shape having a vane processing surface. When electrolytic processing is performed, a work is rotated around an X axis. In addition, if processing of one vane is completed, the work is positioned by rotating around a Z axis by one pitch.

[0003] Patent Document 1: Japanese Patent Application Publication No. 1-222820

[0004] The electrolytic processing device described in Patent Document 1 is a device in which a plurality of vanes are formed by performing electrolytic processing one by one by a pair of processing electrodes, and the processing time becomes long. In addition, since the vanes are processed one by one, the processing accuracy of the plurality of vanes sometimes differs. SUMMARY

[0005] The present application has been made in view of the above-described problems, and an object thereof is to provide an electrolytic processing device capable of shortening a processing time and processing an impeller with high accuracy.

[0006] The electrolytic processing device according to the present application is an electrolytic processing device that performs electrolytic processing on an impeller in which a plurality of vanes are roughly shaped along an outer periphery. The electrolytic processing device is provided with a support table, a rotation shaft, and a plurality of discharge electrodes. The support table supports the impeller. The rotation shaft holds the support table so as to be rotatable. The plurality of discharge electrodes are arranged at equal intervals on a circumference centered on the rotation shaft, and are provided so as to be able to come into contact with or be separated from the plurality of vanes one to one. Each of the plurality of discharge electrodes has an electrode surface along a processed surface of a corresponding one of the plurality of vanes. After each of the plurality of discharge electrodes is moved to an inner side in a radial direction of the rotation shaft, the rotation shaft is rotated, and thus electrolytic processing is performed in a state in which the electrode surface and the processed surface are close to and face each other.

[0007] In one aspect of the present application, the electrolytic processing device is further provided with a plurality of nozzles. The plurality of nozzles are arranged adjacent to a corresponding one of the plurality of discharge electrodes. Each of the plurality of nozzles has a discharge port that discharges an electrolytic solution between the electrode surface and the processed surface. Each of the plurality of nozzles has a recess on a side opposite to the electrode surface side of an end portion on the discharge port side.

[0008] In one aspect of the present application, the support table is connected to the rotation shaft in a detachable manner.

[0009] In one aspect of the present application, the electrolytic processing device further includes a plurality of electrode holders and a plurality of positioning plates. The plurality of electrode holders holds the plurality of discharge electrodes one-to-one in correspondence. The plurality of positioning plates positions the plurality of discharge electrodes one-to-one on the plurality of electrode holders.

[0010] In one aspect of the present application, each of the plurality of discharge electrodes is detachably connected to a corresponding electrode holder of the plurality of electrode holders.

[0011] According to the present application, it is possible to shorten the processing time and to process the impeller with high precision. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a plan view showing a state before processing start of the electrolytic processing device of one embodiment of the present application.

[0013] Figure 2 is a perspective view showing a structure of the electrolytic processing device of Figure 1 .

[0014] Figure 3 is a longitudinal sectional view showing a structure of the electrolytic processing device of Figure 2 .

[0015] Figure 4 is a plan view showing a state where each of the plurality of discharge electrodes in the electrolytic processing device of one embodiment of the present application moves to the radially inner side of the rotation axis.

[0016] Figure 5 is a perspective view showing a structure of the discharge electrode, the first nozzle, and the second nozzle provided in the electrolytic processing device of one embodiment of the present application.

[0017] Figure 6 is a front view showing the discharge electrode, the first nozzle, and the second nozzle of Figure 5 , as viewed in the direction of the arrow VI.

[0018] Figure 7 is a perspective view showing a structure of the discharge electrode provided in the electrolytic processing device of one embodiment of the present application.

[0019] Figure 8 is a perspective view showing a structure of the first nozzle provided in the electrolytic processing device of one embodiment of the present application.

[0020] Figure 9 is a perspective view showing a structure of the second nozzle provided in the electrolytic processing device of one embodiment of the present application.

[0021] Figure 10 is a plan view showing a structure of the first nozzle of the first modification example.

[0022] Figure 11 is a partial perspective view showing the periphery of the first discharge port of the first nozzle of the electrolytic processing apparatus of the second modification example as viewed from the front side.

[0023] Figure 12 is a partial perspective view showing the periphery of the second discharge port of the second nozzle of the electrolytic processing apparatus of the third modification example as viewed from the lower side. DETAILED DESCRIPTION

[0024] An electrolytic processing apparatus of an embodiment of the present application will be described below with reference to the drawings. In the following description, the same or equivalent parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated.

[0025] Figure 1 is a plan view showing a state before processing start of the electrolytic processing apparatus of the embodiment of the present application. Figure 2 is a perspective view showing the structure of the electrolytic processing apparatus of Figure 1 . Figure 3 is a longitudinal sectional view showing the structure of the electrolytic processing apparatus of Figure 2 . In Figure 1 and Figure 3 , a clamping mechanism to be described later is not shown. In Figure 2 and Figure 3 , only one of the plurality of discharge electrodes is shown.

[0026] As shown in Figures 1 to 3 , the electrolytic processing apparatus 100 of the embodiment of the present application is an electrolytic processing apparatus that performs electrolytic processing on an impeller 10 in which a plurality of blades 11 are roughly molded along the outer periphery. The impeller 10 is composed of, for example, titanium alloy. The impeller 10 before electrolytic processing is roughly molded by, for example, casting. The impeller 10 is used, for example, for a turbine impeller. Each of the plurality of blades 11 has a processed surface 12 that is twisted and bent on one side. In the present embodiment, the impeller 10 has nine blades 11. However, the number of blades 11 that the impeller 10 has is not limited to nine, but can be a plurality.

[0027] The electrolytic processing apparatus 100 includes a support table 110, a rotation shaft 120, and a plurality of discharge electrodes 130. The support table 110 supports the impeller 10 in a detachable manner. The rotation shaft 120 holds the support table 110 so as to be rotatable. The support table 110 is connected to the rotation shaft 120 in a detachable manner. The rotation shaft 120 is connected to a rotation driving portion, not shown.

[0028] The plurality of discharge electrodes 130 are arranged at equal intervals on a circumference centered on the rotation shaft 120, and are configured to contact or separate from the plurality of vanes 11 one-to-one. In the present embodiment, the electrolytic processing device 100 is provided with nine discharge electrodes 130. One discharge electrode 130 is arranged so as to be able to contact or separate from one vane 11.

[0029] The discharge electrode 130 has an electrode surface 131 along the processed surface 12 of the vane 11. That is, each of the plurality of discharge electrodes 130 has an electrode surface 131 along the processed surface 12 of the corresponding one of the plurality of vanes 11. The electrode surface 131 is twisted and curved.

[0030] The electrolytic processing device 100 is further provided with a plurality of electrode holders 170 and a plurality of positioning plates 140. The discharge electrode 130 is held by the electrode holder 170 so as to be able to move in the radial direction of the rotation shaft 120. The plurality of electrode holders 170 hold the plurality of discharge electrodes 130 one-to-one. In the present embodiment, the electrolytic processing device 100 is provided with nine electrode holders 170. Each of the nine electrode holders 170 is configured to be able to slide in a straight line.

[0031] Each of the plurality of discharge electrodes 130 is detachably connected to the corresponding one of the plurality of electrode holders 170. In the present embodiment, the discharge electrode 130 is provided with a through-hole. The discharge electrode 130 is fastened to the electrode holder 170 by a bolt 160 that passes through the through-hole.

[0032] An insulating plate 150 is arranged on the upper surface of each of the plurality of electrode holders 170. The discharge electrode 130 and the electrode holder 170 are electrically insulated from each other by the insulating plate 150. The insulating plate 150 is, for example, composed of an insulating resin such as an epoxy resin.

[0033] The positioning plate 140 is fixed to the insulating plate 150. The positioning plate 140 has a flat upper surface on which the discharge electrode 130 is placed, a side wall that contacts the side surface of the discharge electrode 130, and a rear wall that contacts the end surface of the root side of the discharge electrode 130.

[0034] The discharge electrode 130 placed on the upper surface of the positioning plate 140 is positioned on the electrode holder 170 by being arranged so that the side wall of the positioning plate 140 contacts the side surface of the discharge electrode 130 and the rear wall of the positioning plate 140 contacts the end surface of the root side of the discharge electrode 130. That is, the plurality of positioning plates 140 position the plurality of discharge electrodes 130 one-to-one on the plurality of electrode holders 170. Furthermore, a gasket can be inserted into the gap between the discharge electrode 130 and the positioning plate 140 to fine-tune the position of the discharge electrode 130.

[0035] As described later, the electrode face 131 of the discharge electrode 130 positioned on the electrode holder 170 is located at a position opposed to the machined face 12 of the impeller 10 with a gap interposed therebetween when the discharge electrode 130 moves to the radially inner side of the rotation axis 120.

[0036] The electrolytic machining device 100 further has linear driving sections 180 that drive the electrode holder 170 in the radial direction of the rotation axis 120. In the present embodiment, nine linear driving sections 180 are provided, and the linear driving sections 180 are connected to the electrode holder 170 one by one.

[0037] As shown in FIG. 6, the electrolytic machining device 100 further has a clamping mechanism 190. The clamping mechanism 190 is provided so as to be movable in the up-and-down direction, and is capable of pressing and clamping the impeller 10 supported by the support table 110 from above. Figure 2

[0038] Figure 4 is a plan view showing the state in which the plurality of discharge electrodes move to the radially inner side of the rotation axis in the electrolytic machining device of an embodiment of the present application. In Figure 4 , a case in which the discharge electrodes 130 move to the radially inner side of the rotation axis only is illustrated.

[0039] The linear driving sections 180 are driven to bring the electrode holder 170 close to the impeller 10, whereby the discharge electrodes 130 move to the radially inner side of the rotation axis 120 as shown in FIG. 6. Figure 4 As a result, the electrode faces 131 of the discharge electrodes 130 are opposed to the machined faces 12 of the vanes 11 of the machining target with a gap interposed therebetween.

[0040] Then, the rotation axis 120 is rotated in the direction indicated by the arrow R of FIG. 7 by the rotation driving section, whereby the electrode faces 131 and the machined faces 12 approach and oppose each other. In the present embodiment, the electrode faces 131 of the nine discharge electrodes 130 approach and oppose the machined faces 12 of the nine vanes 11 one by one at the same time. In this state, discharge machining is performed by applying a voltage to the discharge electrodes 130. In the vanes 11 in which discharge machining is performed, the thickness from the rough molding is thinned, and the surface roughness of the machined faces 12 becomes smooth. Figure 2

[0041] Here, the structure of the discharge electrodes 130 of the electrolytic machining device 100 of the present embodiment will be described in detail.

[0042] Figure 5 is a perspective view showing the structure of the discharge electrode, the first nozzle, and the second nozzle provided in the electrolytic machining device of an embodiment of the present application. Figure 6 is a view showing the structure of the discharge electrode, the first nozzle, and the second nozzle provided in the electrolytic machining device of an embodiment of the present application, as viewed in the direction of the arrow VI. Figure 5 ​​A front view of the discharge electrode, the first nozzle, and the second nozzle. Figure 7 A perspective view showing a structure of a discharge electrode of an electrolytic processing device according to an embodiment of the present application. Figure 8 A perspective view showing a structure of a first nozzle of an electrolytic processing device according to an embodiment of the present application. Figure 9 A perspective view showing a structure of a second nozzle of an electrolytic processing device according to an embodiment of the present application.

[0043] As shown in Figures 5 to 9 , the electrolytic processing device 100 further includes a first nozzle 134 and a second nozzle 136 that are integrally formed with the discharge electrode 130 in a detachable manner. The discharge electrode 130 is formed of an electrically conductive member. Each of the first nozzle 134 and the second nozzle 136 is formed of an insulating resin such as an epoxy resin.

[0044] However, the discharge electrode 130, the first nozzle 134, and the second nozzle 136 can be formed of one electrically conductive member. For example, the discharge electrode 130, the first nozzle 134, and the second nozzle 136 can be integrally formed by 3D printing or the like using an electrically conductive material.

[0045] As shown in Figure 5 and Figure 6 , the first nozzle 134 is disposed adjacent to the discharge electrode 130. In the present embodiment, nine first nozzles 134 are disposed adjacent to corresponding ones of the nine discharge electrodes 130.

[0046] As shown in Figure 4 , the first nozzle 134 has a first discharge port 132 that discharges electrolyte between the electrode face 131 and the machined face 12 in a state in which the electrode face 131 and the machined face 12 are close to and oppose each other along the electrode face 131. The first discharge port 132 has a shape along the electrode face 131 when viewed from the front. The side surface of the first nozzle 134 on the side opposite to the side of the electrode face 131 has a recess 135 on the end portion on the side of the first discharge port 132.

[0047] The second nozzle 136 is disposed above the discharge electrode 130. As shown in Figure 4 , the second nozzle 136 has a second discharge port 133 that discharges electrolyte between the electrode face 131 and the machined face 12 in a state in which the electrode face 131 and the machined face 12 are close to and oppose each other from above. The second nozzle 136 is curved at a curved portion 137 when viewed from above, and the second discharge port 133 is located above the electrode face 131. The second discharge port 133 has a shape along the electrode face 131 when viewed from below.

[0048] As shown in Figure 7The discharge electrode 130 has a main body portion 130a that is engaged with each of the first nozzle 134 and the second nozzle 136, as shown. Figure 8 The first nozzle 134 has a first engagement portion 134a that is formed inside with a flow path of the electrolyte toward the first discharge port 132 and is engaged with the main body portion 130a, as shown.

[0049] The second nozzle 136 has a second engagement portion 136a that is formed inside with a flow path of the electrolyte toward the second discharge port 133 and is engaged with the main body portion 130a, as shown. Figure 9 The discharge electrode 130 and the second nozzle 136 are integrally configured in a manner that can be attached to and detached from each other.

[0050] Figure 10 is a plan view showing the structure of the first nozzle of the first modification. As shown in Figure 10 The first nozzle 234 of the first modification has a flow inlet 231 into which the electrolyte flows, and a first engagement portion 234a that is formed inside with a flow path of the electrolyte toward the first discharge port 132 and is engaged with the main body portion 130a.

[0051] A rectifying mechanism is provided in the flow path of the electrolyte of the first nozzle 234. In the first modification, a first reduced diameter portion 232 and a second reduced diameter portion 233 are provided in the first nozzle 234. Thereby, the flow path of the electrolyte of the first nozzle 234 meanders between the flow inlet 231 and the first discharge port 132, and the flow inlet 231 and the first discharge port 132 do not communicate in a straight line. Further, the structure of the rectifying mechanism is not limited to the reduced diameter portion, and can be any structure that can make the distribution of the electrolyte discharged from the first discharge port 132 uniform. Further, the rectifying mechanism can also be provided in the second nozzle 136. In the case where the rectifying mechanism is provided in the second nozzle 136, the distribution of the electrolyte discharged from the second discharge port 133 can be made uniform.

[0052] Figure 11 is a partial perspective view showing the periphery of the first discharge port of the first nozzle of the electrolytic machining device of the second modification, as viewed from the front side. As shown in Figure 11 The first discharge port 332 of the first nozzle 334 of the electrolytic machining device of the second modification is constituted by a wall surface 139 that is continuous with the electrode surface 131 of the discharge electrode 130, an opposing surface 332a in the first nozzle 334 that is opposed to the wall surface 139 at a spacing, and a first connecting surface 332b and a second connecting surface 332c that connect the wall surface 139 and the opposing surface 332a to each other.

[0053] In the second modification, the electrolyte discharged from the first discharge port 332 of the first nozzle 334 can be continuously supplied from the wall surface 139 along the electrode surface 131 to between the electrode surface 131 and the machined surface 12. Thereby, the electrolyte can be supplied to between the electrode surface 131 and the machined surface 12 with a more uniform distribution, and the impeller 10 can be machined with high accuracy.

[0054] Figure 12 is a partial perspective view showing the periphery of the second discharge port of the second nozzle of the electrochemical machining device of the third modification as viewed from the lower side. As shown in Figure 12 , the second discharge port 433 of the second nozzle 436 of the electrochemical machining device of the third modification is approximately circular as viewed from the lower side. The opening area of the second discharge port 433 is larger than the opening area of the second discharge port 133 of the first embodiment. Thereby, the flow rate of the electrolyte discharged from the second discharge port 433 can be reduced, and the electrolyte can be supplied to between the electrode surface 131 and the machined surface 12 with emphasis on a portion where the electrolyte discharged from the first discharge port 132 is difficult to spread.

[0055] In the electrochemical machining device 100 of the first embodiment of the present application, the electrochemical machining device in which the impeller 10 in which a plurality of blades 11 are roughly shaped is electrochemically machined along the outer periphery, and after each of the plurality of discharge electrodes 130 is moved to the radially inner side of the rotary shaft 120, the rotary shaft 120 is rotated, whereby the electrochemical machining is performed in a state where the electrode surface 131 and the machined surface 12 are close to and oppose each other. Thereby, the plurality of blades 11 of the roughly shaped impeller 10 can be electrochemically machined at the same time, so the machining time can be shortened, and the impeller 10 can be machined with high accuracy while preventing the machining accuracy of the plurality of blades 11 from being different.

[0056] In the electrochemical machining device 100 of the first embodiment of the present application, the first nozzle 134 disposed adjacent to the discharge electrode 130 has the first discharge port 132 that discharges the electrolyte to between the electrode surface 131 and the machined surface 12 along the electrode surface 131. Thereby, the electrolyte can be supplied to between the electrode surface 131 and the machined surface 12 with a uniform distribution, and the impeller 10 can be machined with high accuracy.

[0057] In the electrochemical machining device 100 of the first embodiment of the present application, the first nozzle 134 has the recessed portion 135 in the side surface of the end portion on the side opposite to the electrode surface 131 side. As shown in Figure 4 , in a state where the electrode surface 131 and the machined surface 12 are close to and oppose each other, the case where the adjacent other discharge electrode 130 interferes with the first nozzle 134 can be suppressed by the recessed portion 135.

[0058] In the electrochemical machining device 100 of one embodiment of the present application, the support table 110 is detachably connected to the rotary shaft 120. Thus, only the support table 110 damaged by electrochemical machining can be detached from the rotary shaft 120 and replaced.

[0059] In the electrochemical machining device 100 of one embodiment of the present application, the positioning plate 140 positions the discharge electrode 130 on the electrode holder 170. Thus, the positional deviation of the electrode surface 131 from the machined surface 12 can be reduced, and the impeller 10 can be machined with high accuracy. In addition, a gasket can be inserted into a gap between the discharge electrode 130 and the positioning plate 140 to finely adjust the position of the discharge electrode 130.

[0060] In the electrochemical machining device 100 of one embodiment of the present application, the discharge electrode 130 is detachably connected to the electrode holder 170. Thus, only the discharge electrode 130 damaged by electrochemical machining can be detached from the electrode holder 170 and replaced.

[0061] In the electrochemical machining device 100 of one embodiment of the present application, the second nozzle 136 provided above the discharge electrode 130 has the second discharge port 133 that discharges the electrolyte from above between the electrode surface 131 and the machined surface 12. Thus, the electrolyte can be supplied to between the electrode surface 131 and the machined surface 12 at a uniform distribution, and the impeller 10 can be machined with high accuracy.

[0062] In the electrochemical machining device 100 of one embodiment of the present application, the discharge electrode 130 and the first nozzle 134 are integrally formed in a manner detachable from each other. Thus, the discharge electrode 130 and the first nozzle 134 can be easily manufactured compared to the case where the discharge electrode 130 and the first nozzle 134 are formed in an integral manner, and only the discharge electrode 130 damaged by electrochemical machining can be replaced.

[0063] In the electrochemical machining device 100 of one embodiment of the present application, the discharge electrode 130 and the second nozzle 136 are integrally formed in a manner detachable from each other. Thus, the discharge electrode 130 and the second nozzle 136 can be easily manufactured compared to the case where the discharge electrode 130 and the second nozzle 136 are formed in an integral manner, and only the discharge electrode 130 damaged by electrochemical machining can be replaced.

[0064] In the electrochemical machining device 100 of one embodiment of the present application, the second nozzle 136 is curved in the curved portion 137 as viewed from above, and the second discharge port 133 is positioned above the electrode surface 131. Thus, as illustrated in FIG. 6, in a state where the electrode surface 131 and the machined surface 12 are close to and face each other, the case where the adjacent second nozzles 136 interfere with each other can be suppressed. Figure 4 Thus, the discharge electrode 130 and the second nozzle 136 can be easily manufactured compared to the case where the discharge electrode 130 and the second nozzle 136 are formed in an integral manner, and only the discharge electrode 130 damaged by electrochemical machining can be replaced.

[0065] In the electrolytic processing device of the first modification example, the flow path of the electrolyte toward the first discharge port 132 of the first nozzle 234 and the flow path of the electrolyte toward the second discharge port 133 of the second nozzle 136 are provided with the rectifying mechanism at least one of them. Thereby, in at least one of the first discharge port 132 and the second discharge port 133, the distribution of the discharged electrolyte can be made uniform, the electrolyte can be supplied between the electrode face 131 and the processed face 12 with a more uniform distribution, and the impeller 10 can be processed with high precision.

[0066] In the electrolytic processing device of the second modification example, the first discharge port 332 of the first nozzle 334 is composed of the wall face 139 continuous with the electrode face 131 of the discharge electrode 130, the opposing face 332a in the first nozzle 334 opposing the wall face 139 at a distance, and the first connecting face 332b and the second connecting face 332c connecting the wall face 139 and the opposing face 332a to each other. Thereby, the electrolyte discharged from the first discharge port 332 of the first nozzle 334 can be continuously supplied from the wall face 139 along the electrode face 131 and to the electrode face 131 and the processed face 12 with a more uniform distribution, and the impeller 10 can be processed with high precision.

[0067] In the electrolytic processing device of the third modification example, the second discharge port 433 of the second nozzle 436 is approximately circular when viewed from below, and the opening area of the second discharge port 433 is relatively large. Thereby, the flow rate of the electrolyte discharged from the second discharge port 433 can be reduced, and the electrolyte can be supplied between the electrode face 131 and the processed face 12 to the portion where the electrolyte discharged from the first discharge port 132 is difficult to reach as a focus.

[0068] It should be considered that the embodiments disclosed this time are illustrative in all respects, but are not restrictive. The scope of the present application is not shown by the above description but shown by the technical scope of the claims, and is intended to include all the changes derived from the meaning and scope of equivalents to the technical scope.

[0069] Explanation of Reference Numerals

[0070] 10… impeller, 11… blade, 12… machined surface, 100… electrochemical machining device, 110… support table, 120… rotating shaft, 130… discharge electrode, 130a… main body portion, 131… electrode surface, 132, 332… first discharge port, 133, 433… second discharge port, 134, 234, 334… first nozzle, 134a, 234a… first engagement portion, 135… recessed portion, 136, 436… second nozzle, 136a… second engagement portion, 137… bent portion, 139… wall surface, 140… positioning plate, 150… insulating plate, 160… bolt, 170… electrode holder, 180… linear drive portion, 190… clamping mechanism, 231… inflow port, 232… first reduced diameter portion, 233… second reduced diameter portion, 332a… opposing surface, 332b… first connecting surface, 332c… second connecting surface.

Claims

1. An electrochemical machining device which electrochemically machines an impeller in which a plurality of blades are roughly shaped along an outer periphery, wherein The electrolytic processing device described above is provided with: a support table that supports the impeller; a rotating shaft that holds the support table so as to be rotatable; and a plurality of discharge electrodes that are arranged at equal intervals on a circumference centered on the rotating shaft and are configured to be able to come into contact with or move away from the plurality of blades one-to-one, each of the plurality of discharge electrodes has an electrode surface that faces the machined surface of the corresponding one of the plurality of blades, after each of the plurality of discharge electrodes moves to the inside in the radial direction of the rotating shaft, the rotating shaft is rotated, whereby electrolytic processing is performed in a state in which the electrode surface and the machined surface are close to and face each other, the electrolytic processing device is further provided with a plurality of nozzles that are arranged adjacent to the corresponding one of the plurality of discharge electrodes, the nozzles having discharge ports that discharge electrolyte between the electrode surface and the machined surface, each of the plurality of nozzles has a recess on the side opposite to the electrode surface side on the end portion on the discharge port side.

2. The electrolytic processing device according to claim 1, wherein the support table is connected to the rotating shaft in a detachable manner.

3. An electrochemical machining apparatus according to claim 1 or 2, wherein Further provided are: a plurality of electrode holders that hold the plurality of discharge electrodes one-to-one; and a plurality of positioning plates that position the plurality of discharge electrodes one-to-one on the plurality of electrode holders.

4. The electrolytic processing device according to claim 3, wherein each of the plurality of discharge electrodes is connected to the corresponding one of the plurality of electrode holders in a detachable manner.

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