JPS61178116A - Manufacture of metal foil and its producing equipment - Google Patents

Abstract

PURPOSE:To efficiently manufacture strong and stable metal foil in a high yield rate, by applying voltage between an electrified portion of a rotating wheel and a work, fixed to a work fixing bed, and polishing the work by the wheel. CONSTITUTION:A wheel 3 alternately forms a conductive part 31 and a non- conductive part 32. The conductive part 31 is electrically connected with a conductive rotary shaft 1. The non-conductive part 32 is a polishing part disclosing an abrasive grain. An electric current is supplied to the rotary shaft 1 through an electric current supplying brush 6. While a fixing bed 7, fixing a plasticized work 4, is rotated. Machining fluid is supplied from a nozzle 5 to a portion where the wheel 3 is brought into contact with the work 4. The work 4 is machined to excellent metal foil by synergetic machining by electrolytic action discharge action and mechanical polishing action.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method and apparatus for manufacturing metal foil.

<Conventional Technology> To explain the conventional technology for manufacturing foils of highly brittle materials, conventionally, first, cutting and grinding is performed to form a foil of 0.1 to 1. Make a thin plate with a thickness of o+nn+.

This is then subjected to a ramping process in which it is mechanically polished between rotating disks using free abrasive grains such as alumina (AlxO3), green carborundum (GC), and diamond.

As a result, this method produces a thin plate of about 30 to 50 μm.

Thinner foils are produced by polishing using ultrafine free abrasive grains such as diamond, or by mechanochemical boring, which polishes the workpiece while dropping an etching solution.

<Problems with the prior art> (1) Since the conventional method described above uses only (or is mainly based on) a mechanical ramping action, distortion and micro surface defects are likely to occur in the workpiece. .

(2) As a result, in the case of highly brittle materials, if the thickness is less than 50 μm, it is extremely easy to break, and the yield is therefore poor.

(3) Therefore, it is difficult to obtain a strong thin foil made of a highly brittle material.

(4) Machining speed is slow and efficiency is extremely low.

(5) Boring processing requires a long time. therefore,
Mass production of foils requires a large number of lapping or boring machines, resulting in very high processing costs.

(6) In the case of highly brittle materials, the foil is made by directly cutting, grinding, and magnetically processing the cast material.

Therefore, defects such as segregation and pinholes in the cast material remain on the foil.

As a result, the properties of the foil, both mechanically and chemically, fall short of the original properties of the material, and corrosion resistance, abrasion resistance, workability, etc. are often unexpectedly poor.

OBJECTS OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a method and a manufacturing apparatus that can efficiently manufacture strong and stable metal foil at a high yield. With the goal.

In order to achieve the above object, the present invention applies a voltage between the current-carrying part of the rotating grindstone and the workpiece fixed to the workpiece fixing table. It is characterized by being processed using a whetstone.

Further, the method is characterized in that the electrodes are brought close to or in contact with the grindstone and a voltage or current is applied to carry out the above-mentioned processing while sharpening the grindstone.

Furthermore, the workpiece is characterized by being subjected to plastic working in advance to prevent defects and segregation during casting and to make it hangable.

The configuration will be described below based on embodiments of the present invention.

Structure of the whetstone In the manufacturing method of the present invention, a whetstone 3 as shown in FIG. 3 is used.

This whetstone 3 is a whetstone in which conductive portions 31 and non-conductive portions 32 are alternately formed.

This conductive portion 31 is electrically connected to the conductive rotating shaft 1 .

The non-conductive portion 32 is a polished portion where abrasive grains are exposed.

In the case of a grindstone with the above structure, the applied voltage waveform can be a smooth wave, a sine wave, a pulse wave, a square wave, a sawtooth wave, an alternating current containing high frequency, or a waveform that is a combination of these. .

In addition to the grindstone shown in FIG. 3, a grindstone whose entire surface is electrically conductive can also be used.

In that case, it is effective to apply a pulse wave alone or in combination with other wave types.

〈〈〈〈〈〉Apparatus〉 Fig. 1 shows an explanatory diagram of an electrolytic grinding lapping method and an apparatus according to an embodiment of the present invention.

The above-described disc-shaped conductive grindstone 3 is mounted on an insulated rotating shaft 1.
Attach to. Power is supplied to this rotating shaft 1 via a power supply brush 6.

Note that the rotation axis can be used not only when it is horizontal as shown in FIG. 1, but also when it is vertical or inclined at a certain angle with respect to the horizontal axis.

On the other hand, a workpiece fixing table 7 is attached to the rotating shaft 2, and a hot-rolled work piece 4 can be fixed to this workpiece fixing table 7.

Kuha〉How to use First, rotation is applied to the grindstone 3 described above.

On the other hand, a workpiece 4 which has already undergone plastic working is attached to the workpiece fixing table 7 and rotated.

While the workpiece 4 is being rotated, a predetermined machining fluid is supplied from the machining fluid nozzle 5 to the contact portion.

Then, a machining power source is applied between the grindstone rotating shaft 1 and the workpiece rotating shaft 2 to bring them into contact with each other.

Note that as the motion given to the workpiece, in addition to rotational motion, reciprocating motion, a motion that combines rotation and reciprocating programs, etc. can be adopted.

As a result, the following three actions occur between the grindstone 3 and the workpiece 4.

(1) Electrolytic action (2) Discharge action (3) Mechanical grinding action.

Dissolution of the surface of the workpiece 4 progresses due to such discharge action and electrolytic action.

At this time, a mechanical grinding action is simultaneously activated to mechanically remove this melted portion.

In this way, electrical and electrochemical processing and mechanical grinding proceed at high speed.

As a result, a synergistic processing effect is exhibited, and the workpiece 4
The processing progresses well.

Other Embodiments FIG. 2 shows an embodiment in which a dressing electrode 8 is used for the grindstone 3 in the above embodiment.

The dressing electrode 7 is brought close to or in contact with the grindstone 3, and an energized state is generated between the two from the dressing electrode 9.

In this case, the processing power source can also be used as the dressing power source without providing a dressing electrode separately from the processing power source as shown in FIG.

Regardless of whether it is provided separately or used in combination, the above-mentioned processing is performed while sharpening the grindstone 3 by applying voltage and current between the grindstone 3 and the electrode 8. be.

In this case, when the electrode is brought close to the grindstone, dressing is performed by the dissolving action of discharge and electrolysis.

When the electrode and the grindstone are brought into contact, a mechanical polishing action can be expected in addition to the electric discharge and electrolytic action, and it is even more efficient because dressing can be performed at the same time as processing the workpiece.

Experimental Example> As an experimental example, the experimenter used a 0.3++wa (IOXI
50μ thick (10X 10
) have been successfully processed into sendust groups.

Machining efficiency requires 8 hours in conventional one-stage machining
However, as a result of using the processing method of the present invention, processing became possible in 5 minutes.

The processing conditions are as follows.

Whetstone, CBN (resin bond) whetstone.

Radially formed conductive and non-conductive parts.

Diameter: 125 Rotation speed: 1.40 rpm Electrolyte: 0.5% NaNOs Voltage: DC 32V Current = IA Effects of the present invention> Since the present invention is as described above, the following effects can be achieved. You can expect good results.

Kui〉The ingot is made of a material with no defects or segregation, and the three effects of electric discharge, electrolysis, and mechanical grinding work synergistically on the workpiece, making it possible to use conventional lapping, Alternatively, a metal foil that is much stronger and has better physical and scientific properties than that produced by the boring process can be produced with high efficiency and high yield.

This processing method is particularly effective for producing foils of difficult-to-process hard and brittle materials such as celetast alloys, cemented carbides, rare earth magnet alloys, and various fiber-reinforced alloys (FRη) amorphous alloys.

Kuha〉Also, if you use a dressing electrode to dress the surface of the grindstone during processing, you can expect even more remarkable effects.

[Brief explanation of drawings]

Fig. 1.2 Explanatory diagram of the device and processing method of the present invention. Fig. 2. Explanatory diagram of other embodiments. Fig. 3: Explanatory diagram of the grindstone used in the device of the present invention.
: Grindstone, 31: Conductive part, 32 Non-conductive part, 7: Work fixing table, 8 Electrode for Nidress, 9 Power supply for Nidress Applicant: Applied Magnetic Research Institute Ltd. Figure 2

Claims (5)

[Claims] (1) Workpieces or materials that have been plastically processed in advance while applying plane motion parallel to the rotating disk surface of a disc-shaped grindstone, or a portion of which is electrically conductive. A method for producing metal foil, which comprises: pressing a workpiece taken from the plate, applying a voltage between the two, and polishing the workpiece while supplying machining fluid to the plate surface and/or the contact surface between the plate surface and the workpiece. . (2) A claim characterized in that electrodes are arranged close to or in contact with each other on the surface of a grinding wheel, and a voltage is applied between the electrode and the grinding wheel to dress the grinding wheel while polishing the workpiece. Invention described in paragraph 1 (3) A rotating disc-shaped grindstone, a work holding device that holds the workpiece and presses the workpiece against the disk surface of the grindstone while imparting in-plane motion parallel to the disk surface, a machining fluid supply device, and the workpiece. A metal foil manufacturing device characterized by comprising a processing power supply device that electrically connects a grindstone. (4) The invention according to claim 3, comprising an electrode disposed close to or in contact with the grinding wheel surface, and a dressing power supply electrically connected to the electrode and the grinding wheel. (5) The invention set forth in claim 4, in which a processing power source is used as a dressing power source.