JPS59182028A - Electrolytic composite machining method - Google Patents

Abstract

PURPOSE:To perform machining satisfying the required flatness by setting the diameter of a disk-type tool for electrolytic composite machining to a preset value or more determined by the machining depth and the flatness. CONSTITUTION:If the ratio between the diameter D of a disk-type tool for electrolytic composite machining and the effective machining width W is made an effective constant K, the effective constant K is determined by the machining depth dc and the flatness S. To finish the machined surface to the required flatness S or less, an equation D>=W/K nees to be met. Accordingly, the desired flatness can be satisfied by determining the tool diameter D and the effective machining width W.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrolytic composite processing method that combines the elution and removal action of an anodic metal workpiece by electrolytic action and the mechanical abrasive abrasion action. The purpose is to process the shape.

Conventionally, there is an electrolytic machining method as a method of machining anodic metal workpieces by electrolytic elution of metal. This method is carried out by placing an anodic metal workpiece and a cathodic electrode facing an electrolyte and controlling the current density, electrolyte flow rate, etc. However, with this method, it is difficult to ensure a uniform machining depth over the entire machined surface due to uneven current density distribution and non-uniform flow velocity in the electrolytic gap, making it unsuitable for machining that requires precision. It is. Additionally, there are many problems with removal speed and workability.

On the other hand, an electrolytic grinding method is a typical example of a processing method that combines this electrolytic action with a mechanical abrasive abrasion action. In this method, the grinding force of the rigid grindstone used and the current density IA/c
A high removal rate can be obtained by the highly efficient electrolytic elution action of m or more.

This method is originally a processing method that emphasizes productivity, but the processing accuracy of the workpiece is determined by the equipment accuracy, and it cannot be improved beyond that. Therefore, for example, it is difficult to ensure precision in precision machining of large-area planes, and work efficiency is reduced.

Furthermore, instead of a rigid grindstone, there is a method of using a flexible abrasive material such as puff material, as shown in FIG. In this method, an electrode (1) connected to the negative electrode of a DC power source is
Abrasive material applied to insulating and water-permeable nonwoven fabric (
2), lightly press the polishing tool (3) against the metal workpiece (4) connected to the anode of the DC power supply, and then attach the electrode (
This is carried out by flowing the electrolytic solution (6) into the abrasive material (2) from the supply path (5) of 1).

However, this method is a surface finishing technique aimed at reducing the roughness of the machined surface, and is a method for efficiently reducing the unevenness of the machined base surface. Therefore, it is not suitable for purposes such as rough machining from a raw material, and the shape after machining depends on the base material.

This invention was made with the above points in mind,
In an electrolytic composite machining method that utilizes the elution and removal effect of anodic metal workpieces through electrolytic action and the mechanical abrasive abrasion action, a polishing tool with a rotating disk-shaped electrode of a diameter diameter using a flexible abrasive material is used. 1. Cut the flat workpiece to a machining depth dc,
In order to obtain an effective machining width W that satisfies the required flatness S, the relationship between the effective constant I determined by the machining depth dc and the flatness S, and the effective machining width W and the diameter is D≧7w7+.
The present invention provides an electrolytic composite processing method characterized by satisfying the relationship <.

Therefore, according to the present invention, by selecting the diameter of the electrode that satisfies the relationship [)'', it is possible to efficiently shape a planar crop to the required flatness.

Next, this invention will be explained in detail with reference to the drawings from FIG. 2 onwards showing embodiments thereof.

First, FIG. 2, which shows an example of a polishing tool used in the present invention, will be explained.

In the figure, (7) is the base of a conductive rotary polishing tool whose lower end is expanded into a dish shape, (8) is the supply channel for the electrolyte (9) formed in the base (7), and θO is the base ( 7) A disc-shaped electrode with a J-cathode diameter attached to the lower end surface of the electrode (0]) has a diameter of 1.0 to prevent the electrolyte (9) from flowing out through the center of the electrode (1 2 is an insulating, water-permeable, and flexible abrasive material attached to the lower surface of the electrode θQ; (13 is a flat metal workpiece with anode polarity);

During machining, a predetermined current is passed between the cathode electrode θ0 and the anodic metal flat workpiece (1, (1) using the abrasive tool shown in Figure 2, and the abrasive tool is rotated. At the same time, the polishing tool or flat workpiece α'3
Move and do this.

Next, FIG. 3 explains a mechanism for creating a machined shape by the polishing tool of FIG. 2.

First, when the polishing tool and the flat workpiece 0 [phase] move relatively, Fig. 3 (a) after the workpiece 0 has passed the polishing tool.
The machined shape after passing the abrasive tool is shown in Fig. 3 (1) due to the difference in the mechanical abrasion force distribution and the composite machining time at each point of the workpiece (Fig. 3 (1)). Just like that, there is an upsurge in the area around the center and a slump in the surrounding area.

Therefore, although the machining depth by the abrasive tool is not necessarily uniform, the machining method using this tool has the following characteristics.

]) Even with the same abrasive area, by rotating the abrasive tool, the number of abrasive grains that act on a unit part of the workpiece can be increased compared to a method that reciprocates the abrasive tool,
Therefore, high removability can be obtained.

2) Machining of large-area workpieces can be easily handled by increasing the diameter of the electrode of the polishing tool.

On the other hand, the machining depth car at each point 1- of the workpiece is defined as the electrode radius R, (-〇/2) and the machining depth d at the center.
By normalizing by c, the machining shape can be obtained as shown in FIG. 4 regardless of the radius R, and a normalized machining shape that is independent of the electrode diameter and machining depth can be obtained. Therefore, by using this normalized machining shape as a basis, machining conditions can be provided for various required machining shapes.

This invention provides the relationship between the diameter of the electrode of an abrasive tool and the effective machining width W when shaping a flat workpiece with the required flatness S, and FIG. Indicates the machined shape of the machined flat workpiece, and the flatness S
is the difference in depth from the deepest machining depth db, and the effective machining width W is twice the distance r1 from the center (distribution from the center) corresponding to the depth of cl +)'-5. Therefore, when considering machining efficiency, the closer the effective machining width W is to the diameter of the electrode, the more efficient machining can be performed.

Therefore, if the ratio of the effective machining width W to the diameter of the electrode is set as an effective constant -W/D, K can be treated as one measure of machining efficiency.

On the other hand, the effective constant has the relationship between the machining depth dc at the center and the required flatness S, as shown in Figure 6, regardless of the diameter of the electrode, based on the relationship of the normalized machining shape described above. When the machining depth dc7 and the flatness S are given, the effective constant {circle around (2)} is determined.

Next, when the effective machining width W of the workpiece is determined, the diameter of the electrode to be used can be derived based on the effective constant K.

Figure 7 shows the relationship between the electrode diameter and the effective machining width W for the flatness S = 171m and S = 517r+ when the machining depth is l Q Itm. The processing width W increases linearly.

For example, a flat workpiece with a width of 2Q Q mm has a flatness of S-
When processing at 1/1 m, the diameter of the electrode is 92280 m.
This is possible with m or more.

Therefore, the relationship between the effective machining width W, the electrode diameter 1), and the effective constant can be treated as D≧W/, and by selecting the electrode diameter that satisfies this relationship, the required flatness can be satisfied. Shape processing can be performed.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional abrasive tool, and Fig. 2 is an example of an abrasive tool used in the processing method of the present invention. Figure 3 (21), (b
) is an explanatory diagram of the creation mechanism of the machining shape, Figures 4 and 5 are explanatory diagrams of the machining shape, Figure 6 is a diagram of the relationship between the machining depth and the effective constant, and Figure 7 is the relationship between the effective machining width and the electrode diameter. It is a relationship diagram. θO) Electrode, O2/abrasive material, o various workpieces. Agent: Patent Attorney Ryutabe Fujita■ Figure 2 (o) (b) A

Claims (1)

[Claims] ■ In the electrolytic composite processing method that combines the elution and removal action of anodic metal workpieces by electrolytic action and the mechanical abrasive abrasion action, a polishing tool for a rotating disk-shaped electrode with a diameter that uses a flexible abrasive material. is used to machine a flat workpiece to a depth c
In order to obtain an effective machining width W that satisfies the required flatness S, D≧W is established between the effective constant determined by the machining depth dC and flatness S, and the effective machining width W and diameter.
An electrolytic composite processing method characterized by satisfying the relationship: /.