JPS63318212A - Three dimensional electrolytic finishing device - Google Patents

Abstract

PURPOSE:To enable the electrolytic finishing of a three dimensional metallic workpiece by carrying out electrolytic finishing while making an electrolyte flow into a gap via a port opening on the face opposite to an metallic workpiece of an electrode which is placed leaving a slight gap from the workpiece. CONSTITUTION:A DC current is made flow between a metallic workpiece 2 and an electrode 5 between which a nearly constant slight gap S is held, preferably, by means of a constant current pulse power source to carry out the electrolytic finishing of the surface to be electrolytically finished of the metallic workpiece 2. In this case, an electrolyte is made flow uniformly into the gap S from the port 11 of the electrode 5 which preferably has plural openings 11a, 11b, to uniformly give electrolytic machining to the surface to be polished of the metallic workpiece 2. And, a sludge produced during this operation, together with the electrolyte, is made flow into an electrolyte tank 4a from an electrolytic bath 4 by the suction of a pump 12 and is removed by means of a filter, and the cleansed electrolyte is again fed into the gap S between the metallic workpiece 2 and the electrode 5 via a pipe 13.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to electrolytic processing of three-dimensional metal workpieces such as three-dimensional molds, so-called bottom molds, etc. The present invention relates to an electrolytic finishing device for performing electrolytic finishing such as depolishing.

[Conventional technology and problems]

In recent years, so-called electrolytic finishing method (ECM) such as electrolytic machining and electrolyzer 1 has been used for finishing or polishing metal workpieces by wire electrical discharge machining etc., which can process and polish at a higher speed than other machining methods and polishing methods. Since it is possible to do
It is increasingly being introduced as an alternative to conventional machining methods. According to this method, a positive electrode is connected to a metal workpiece to be electrolytically finished, and a negative electrode is connected to a frame placed with a small gap between the metal workpiece through a load resistor, and electrolysis is performed within the gap. The surface of the metal workpiece is electrolytically finished by passing electricity between the positive and negative electrodes while flowing the liquid.

However, in conventional electrolytic finishing equipment, for example, the remaining part of the metal workpiece cut out by wire electric discharge machining is used as a formwork. When processing workpieces, the above-mentioned electrolytic finishing equipment cannot be used, and the finishing of such three-dimensional metal workpieces must be done manually, which makes it difficult to perform the work. The cost was high because it took a long time and required labor costs.

[Purpose of the invention]

In view of the above points, it is an object of the present invention to provide a three-dimensional electrolytic finishing apparatus capable of electrolytically finishing three-dimensional metal workpieces such as three-dimensional molds.

[Means and actions for solving the problem] The above purpose is:
According to the present invention, a certain small amount is applied to a three-dimensional metal workpiece to be subjected to electrolytic finishing such as electrolytic machining or electropolishing, and to a surface of the metal workpiece formed by electroforming etc. and to be subjected to electrolytic finishing. The electrode includes an electrode arranged with a gap therebetween, and a DC power supply having a positive electrode connected to the metal workpiece and a negative electrode connected to the electrode, and preferably having an opening on a surface of the electrode facing the metal workpiece. This is achieved by a three-dimensional electrolytic finishing apparatus that performs electrolytic finishing of the metal workpiece while flowing an electrolytic solution into the gap between the metal workpiece and the electrode through a hole in the metal workpiece.

According to this invention, a three-dimensional metal workpiece such as a three-dimensional mold to be electrolytically finished is subjected to surface processing such as electrolytic machining and electropolishing by electrolytic finishing, so that it can be completed manually in an extremely short time. In addition, the surface accuracy of electrolytic finishing can be basically controlled without changing the difficulty of processing depending on the material of the metal workpiece, so the metal workpiece during finishing work can be finished automatically. The surface accuracy of the metal workpiece can be easily controlled, thus the production cost of three-dimensional metal workpieces can be significantly reduced.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 shows the configuration of an embodiment of an electrolytic finishing apparatus according to the present invention, and the electrolytic finishing apparatus I is configured as follows.

The three-dimensional metal workpiece 2 to be electrolytically finished is an insulator 3
It is fixedly disposed at the bottom of the electrolytic solution tank 4 via. On the other hand, the electrode 5 has a shape that has a certain small gap S with respect to the surface of the metal workpiece 2 to be electrolytically finished.
It has been formed in advance by electroforming or the like, and is attached to the head 7 via an insulator 6. This head 7 is supported so as to be slidable in the vertical direction along a guide 8 fixedly disposed with respect to the electrolyte tank 4, and is threadedly engaged with a feed screw 1o whose rotation can be controlled by a servo motor 9. Accordingly, the electrode 5 can be moved up and down by the rotation of the feed screw lO, and thus the electrode 5 is lowered to the position shown by the dotted line in accordance with the rotation of the servo motor 9, and the metal workpiece 2 is electrolytically finished there. A small, almost constant gap S is maintained with respect to the surface to be used.

Furthermore, the electrode 5 is provided with a hole 11 having openings 11a and Ilb on the surface opposite to the surface to be electrolytically finished of the metal workpiece 2; An electrolytic solution is supplied via a pipe 13 by a pump 12 from an electrolytic solution tank 4a provided with a filter. As a result, the gap S between the metal workpiece 2 and the electrode 5
The electrolyte will flow uniformly inside.

The positive electrode of a DC power source (not shown) is directly connected to the metal workpiece 2, and the negative electrode of the DC power source is connected to the electrode 5 via a load resistor.
Preferably, the use of a constant current pulse power source is suitable because the amount of sludge removed from the surface of the metal workpiece 2 is uniquely determined by the current value and application time.

The embodiment of the electrolytic finishing apparatus according to the present invention is configured as described above, and when performing electrolytic finishing such as electrolytic processing or electrolytic polishing of a three-dimensional metal workpiece 2 using this electrolytic finishing apparatus 1, first, The metal workpiece 2 is fixedly arranged at the bottom of the electrolytic solution PI4 via the insulator 3, and the electrode 5 is placed at the bottom of the electrolyte PI4 through the insulator 6.
The electrode 5 is attached to the head 7 via the servo motor 9, and by rotation control of the servo motor 9, the electrode 5 is lowered to a close position shown by the dotted line and fixed. The electrode 5 thus maintains an approximately constant small gap S with respect to the surface of the metal workpiece 2 to be electrolytically finished.

Here, the above-mentioned DC power supply, preferably a constant current pulse power supply, is connected between the metal workpiece 2 and the electrode 5 at 30A/-, for example.
By passing the current, the surface of the metal workpiece 2 to be electrolytically finished is electrolytically finished. In this case, the hole 11 of the electrode 5 preferably has a plurality of openings 11a, llb.
The electrolytic solution flows uniformly into the gap S, and the surface of the metal workpiece 2 to be polished is uniformly electrolytically processed. The sludge generated during this operation flows from the electrolyte tank 4 into the electrolyte tank 4a together with the electrolyte by the suction action of the pump 12, where it is removed by the action of the filter, and the purified electrolyte is returned to the pipe. 13 into the gap S between the metal workpiece 2 and the electrode 5.

In addition, the above servo motor 9. The operations of the pump 12 and the DC power supply (not shown) are controlled by sequence control.

〔Effect of the invention〕

As described above, according to the three-dimensional electrolytic finishing apparatus of the present invention, a three-dimensional metal workpiece to be subjected to electrolytic finishing such as electrolytic machining or electrolytic polishing is set in an electrolytic solution bath, and is formed by electroforming or the like. The electrodes are arranged so as to have a certain small gap with respect to the surface of the metal workpiece to be electrolytically finished,
and connecting the positive electrode of a DC power source to the metal workpiece and the negative electrode thereof to the electrode, preferably through a hole opened in the surface of the electrode facing the metal workpiece,
Since the metal workpiece is electrolytically finished while flowing the electrode solution into the gap between the metal workpiece and the electrode, the three-dimensional metal workpiece such as the three-dimensional mold to be electrolytically finished can be , Electrolytic finishing allows surface processing such as electrolytic machining and electrolytic polishing to be carried out in an extremely short period of time, rather than manually (automatically). The degree does not fluctuate (,
Basically, the surface accuracy of electrolytic finishing can be controlled by the current value 1 and the application time of electrolytic finishing, which makes it easy to control the surface accuracy, and thus the production cost of three-dimensional metal workpieces can be significantly reduced. .

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the structure of an embodiment of an electrolytic finishing apparatus according to the present invention. 1-.- Electrolytic finishing equipment, 2- Metal workpiece;
3゜6-Insulator; 4--Electrolyte tank; 5--Electrode; 7--Head; 8--Guide, 9- Servo motor; 10--Feed screw; 11--One hole; 12-・
...Pump; 13...-pipe; S-...-gap. Patent Applicant: Stanley Electric Co., Ltd. Agent: Patent Attorney Hirayama - Muroma: Patent Attorney Kaizu Tamotsu 3 Procedural Amendments Director General of the Patent Office Kunio Ogawa 1. Indication of Case 1988 Patent Application No. 152737 No. 2, Name of the invention Three-dimensional electrolytic finishing device 3, Relationship with the case of the person making the amendment Patent applicant address 2-9-13 Nakameguro, Meguro-ku, Tokyo Name (2
30) Stanley Electric Co., Ltd. 4, Agent address: 9th floor, Build Yoshida, 4-30-23 Yotsuya, Shinjuku-ku, Tokyo 160 Tel: 03 (352) 180B Column 7 of "Detailed description of the invention" in the specification, Contents of amendment As shown in the attached sheet (Japanese Patent Application No. 152737/1982) 7. Contents of amendment (1) "Preferably" in line 10 of page 7 of the specification is deleted. (2) Insert the following sentence after "Electrolytic processing" on page 7, line 13. rNote that it is also possible to inject the electrolytic solution into the gap S from the side of the electrode 5 without providing the hole 11 in the electrode 5.
Either one may be selected depending on the conditions such as the shape of the

Claims (2)

[Claims] (1) A three-dimensional metal workpiece to be subjected to electrolytic finishing such as electrolytic machining or electropolishing, and a certain small gap between the surface of the metal workpiece formed by electroforming etc. and to be subjected to electrolytic finishing. and a DC power supply having a positive electrode connected to the metal workpiece and a negative electrode connected to the electrode, and flowing an electrolytic solution into the gap between the metal workpiece and the electrode. A three-dimensional electrolytic finishing device, characterized in that it performs electrolytic finishing of the metal workpiece. (2) the electrode is provided with at least one hole that is open on a surface facing the metal workpiece, and an electrolyte storage source is provided through the hole into the gap between the metal workpiece and the electrode; The three-dimensional electrolytic finishing apparatus according to claim 1, characterized in that the electrolytic solution is caused to flow through the three-dimensional electrolytic finishing apparatus.