JPS61260937A - Method of fabricating functional component part - Google Patents

Abstract

PURPOSE:To reduce the fatigue of a functional part caused by concavities and convexities created during a roughening process, by clamping stacked thin metal sheets, after or before heat-treatment, between thick plates with the use of bolts of a clamp to finish the metal sheets in one unit body. CONSTITUTION:0.005mm thickness of thin stainless steel sheets are stacked one upon another to 600 in the number, and are vertically held between retainer plates 4, 5 by fastening bolts 6 so as to obtain a workpiece 3. During a first fabricating process a wire electrode 1 is made to pierce through a hole previous ly formed in the workpiece 3, and a desired shape functional part 2 is cut off, starting from the hole and is taken out. Then, with the use of a holding means such as a bolt 8, a jig, a clamp or the like, the functional part 2 which is formed of stacked thin metal sheets are integrally held, and then, after being separated from the workpiece 3, is subjected to a finishing process for smoothing or deburring the fabricated surfaces obtained by the roughening process. Thus, it is possible to reduce the fatigue of the functional part which has been brought about during the roughening process, by shaping the functional part during the roughening process and then subjecting the functional part to a finishing electrochemical machining process or a chemical process.

Description

[Detailed description of the invention] Good = Ω book JA door The present invention applies to parts that are called functional parts.

In particular, it relates to a method for processing thin and complicated shaped objects.

Conventional Technology Recently, parts of computer peripheral equipment, parts of OA equipment, parts of electronic equipment, or parts of cameras and musical instruments are processed using thin metal sheets with a thickness of several hundredths of a millimeter or less as functional parts. Many things are used.

Functional parts made using these thin metal materials2 are processed using press chemical etching or wire cut electrical discharge machining, etc., depending on conditions such as production volume, material, shape, plate thickness, etc.; There are many functional parts where material fatigue is a problem due to causes such as cracks on the machined surface left behind and rough cross-sectional shapes.

For example, the elasticity of one functional part? Is it used as a so-called spring action that requires movement such as pulling back or forwarding, or is it a spring action such as a relay? Necessary functional parts and functional parts such as reeds of musical instruments, etc. can be considered. When these functional parts are molded by press processing, they are sheared by the male and female dies, resulting in problems such as roughness and cracks on the cut surfaces, and when chemical etching is performed, the cross-sectional shape becomes acute, and there are problems with wire cuts!
Even with just 770 machining, there is a problem that the machined surface becomes pear-like and small cracks occur. It is extremely difficult to remove it every fall.

Taking these points into consideration, the inventor of the present invention carried out various experiments and prototype production, and as a result, after performing rough machining using wire-cut electric discharge machining, the inventors of the present invention decided to remove burrs and smooth the cut surface after rough machining. Fatigue of parts due to the process? It is designed to perform post-processing, that is, finishing processing, to reduce the amount of heat treated or untreated thin metal material used to process a large number of functional parts with complex shapes. Should I put a thick pad on both sides of the spring and pass it through the Y and fasten it, or tighten it with something like a shako vise and process it as one piece? It was designed to do so.

Therefore, if only the wire cut discharge force is applied, the processed surface may become rough, cracked, or the material itself may become distorted.
If the parts are distorted due to heat treatment after machining, they can be finished by wire cutting again with a 7M process, or post-processing processes such as electrolytic etching and chemical etching can be applied to reduce fatigue of the parts. This is to correct the partial difference in the spring action of the spring material due to the presence of a thermally strained layer that occurs during electrical discharge machining during small and secondary machining.

Table 1 u Fox Present invention 7 To explain the embodiment shown in Figure 1, Figure 1 is a slope view of the workpiece t set when showing the first original process of wire cut electric discharge machining, 1 is a wire electrode,
Reference numeral 2 is a functional part in a spring-like state made by stacking many thin plates.
4.5 is an upper and lower workpiece holding plate that fastens the workpiece 5 using bolts 6 at the four corners.

As the workpiece 5, for example, 600 thin stainless steel plates each having a thickness of 0.05 mm are stacked one on top of the other, held down from above and below by presser plates 4.5, and firmly tightened with bolts 6.

In the first machining process, the workpiece 5 is
This is used as a starting position to process the functional component 2ya into a desired shape and take it out as a cutout. Furthermore, functional parts 2'fj! :Before cutting, the round holes 5a are drilled separately using wire-cut electrical discharge machining, etc., and as shown in Fig. 2, they are fastened using the presser bolts 7.8, and then flexed together. Further, as shown in FIG. 5, a U-shaped jig (commonly known as a U-shaped jig) can be used to force the functional parts 2 together using a shako vise 9'a'. At this time, it is preferable that the shank vise 9 can be rotated even after fastening.

In this way, the thin metal plates are piled up using the holding means 2 such as bolts 8, jigs, or a shank vise 9, and held together to prevent the mental function parts 2 from falling apart, and then the workpieces 3 to 2 are
As shown in the figure, after cutting it off and smoothing out the rough edges created by rough machining, we perform a later process of cutting to remove the burr 17'Y.

As a post-process, finishing blade loe by wire cut electric discharge machining, grinding and polishing by electrolytic machining and chemical etching are performed.

As described above, the present invention is capable of forming 71 thin plates by stacking and forming thin plate materials such as plate pieces that have been heat treated in advance or are heat treated after eggplanting. This is to reduce fatigue and breakage of the machined part that occurs when machining, and the process is divided into rough machining and finishing machining, and when the rough edge is 0 machining, wire cut electric discharge machining is performed to perform forming machining, and finishing In machining, we use the same wire-cut electrical discharge machining to finish, electrolytically process and chemically process the roughened outer periphery to a smooth surface, and remove burrs.
By removing pars and smoothing the cut surface,
It is possible to reduce fatigue of functional parts caused by sharply turned convex surfaces during rough machining.

[Brief explanation of drawings]

Figure 1 is a slope view of the workpiece showing the first machining process.
FIGS. 2 and 3 are perspective views of functional parts for performing post-processing using jig Z. In the figure, 1 is a wire electrode, 2 is a functional component, 5 is a workpiece, and 4
．． 5 is the presser plate, 6 is the presser pole), 7.8 is the presser bolt,
9 is a shako vise such as a jig.

Claims (8)

[Claims] (1) A method for machining functional parts, which comprises rough machining a material made of stacked thin plates into a predetermined shape by wire-cut electrical discharge machining, and then performing finishing machining. (2) The method for machining a functional component according to claim 1, wherein the finishing machining is performed by wire-cut electrical discharge machining. (3) The method for machining a functional component according to claim 1, wherein the finishing process is electrolytic machining. (4) The method for processing a functional component according to claim 1, wherein the finishing process is chemical etching. (5) A method for processing a functional component according to claim 1, wherein the thin plate is fastened by a bolt or the like passing through the functional component. (6) Processing of a functional component according to claim 1, characterized in that the thin plate is bound by thick plates on both sides and fastened with bolts or the like that pass through the functional component. Method. (7) The method for processing a functional component according to claim 1, wherein the thin plate is bound by applying a thick plate to both sides and fastening the sprung functional component using a shank vise. (8) The method for processing a functional component according to claim 1, wherein the thin plate is heat-treated.