JPH0516042A - Precision machining method for thin-wall parts - Google Patents

Abstract

(57) [Summary] [Purpose] The objective is to precisely process materials that are thin and easily deform. [Structure] In the stainless steel precision cast product in the figure, A,
Gypsum is poured into the spaces B, C, and D, and after hardening, the E and F surfaces are cut. Since the gypsum increases the rigidity of the work piece and makes it difficult to deform, the accuracy of the work surface can be maintained. After processing, the gypsum can be easily removed. [Effect] In precision machining of a material that is easily deformed in a thin-walled component, high precision can be achieved by a very simple and inexpensive work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention can be applied to all products to be processed as long as they can cast gypsum. Especially suitable for thin-walled and easily deformable substances. The present invention relates to a precision machining method for thin-walled parts.

[0002]

2. Description of the Related Art Conventionally, as a method of highly accurately processing a thin-walled part that is liable to be deformed, an expensive processing machine having a highly accurate and highly rigid spindle is used, and the cutting amount, feed rate, etc. It was necessary to keep it as low as possible. Therefore, a huge amount of processing time was required. In addition, during processing, a work jig that does not apply local force to the work piece, has resistance to cutting, and does not deform the work piece is required. The jig is also expensive.

[0003]

SUMMARY OF THE INVENTION In order to precisely machine a thin metal part and a material that is easily deformed, the cutting amount, the feed rate, etc. should be suppressed as much as possible, or a complicated jig, etc. Had to be manufactured. Further, even if the above means is taken, there has been a problem that particularly precision casting of thin-walled stainless steel or the like is remarkably deformed and the precision after processing cannot be maintained.

An object of the present invention is to solve the above problems.

[0005]

In order to achieve the above object, a water-soluble gypsum is formed on the inside of a thin-walled component in order to withstand cutting resistance and to impart rigidity to the component and prevent deformation. I poured it. After that, the gypsum is easily removed by processing and immersing the processed product in water after completion of the processing or by spraying water with a certain pressure.

[0006]

The water-soluble gypsum cast inside the thin-walled part hardens by natural drying in a short time. Therefore, when the thin-walled portion and the gypsum portion are in close contact with each other, the rigidity is increased and the deformation is less likely to occur. Further, the more complicated the shape, the more advantageous it is. Because gypsum is liquid, it can be poured in any shape. The gypsum-filled workpiece is processed by ordinary machining. In that case, it is not necessary to reduce the cutting amount, the feed rate, etc., and the processing time can be greatly shortened. Further, the processing jig may be simple. After processing, it can be easily removed by soaking it in water or spraying water with pressure. Gypsum is cheap and this work is easy.

[0007]

[Example] Total length 220 mm, width 30 mm, height 34 m
m, with a minimum wall thickness of 2 mm
The present invention has been implemented. The material is a precision cast product of stainless steel equivalent to SUS304. In the figure, parts A, B, C, and D are missing. Gypsum dissolved in water is poured into the parts A, B, C and D, and naturally dried. It completely cures in about 10 minutes. After that, the E and F surfaces were milled with a normal machine. After processing, by spraying pressurized water,
The gypsum was removed. After removal, the flatness of the E and F planes was measured and found to be within 0.1. This was within the specifications for this part. However, when the same parts were machined as they were without gypsum, they were deformed and twisted, and the flatness was about 1 mm, which was within the standard of 0.1, so I changed the cutting specifications. It was the same.

[0008]

According to the present invention, high precision can be achieved in precision machining of stainless steel precision castings, which are particularly susceptible to deformation in thin-walled parts. It can be economically reduced by increasing the conventional cutting speed and simplifying the jig. Moreover, since the operation of the present invention is very simple, no advanced technique or experience is required. In addition, gypsum, which is the raw material, is also inexpensive and has great effects.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a thin-walled precision stainless steel precision cast component according to an embodiment of the present invention.

[Explanation of symbols]

A, B, C, D ... Parts where meat is missing, E, F ... Cutting surface.

Claims (1)

What is claimed is: 1. A metal part having a thin wall thickness, particularly a wall thickness of about 2 mm or less, particularly a stainless steel material which is likely to be deformed during processing, a stainless precision cast product, and a stainless cast forged product are machined. Therefore, when flatness, dimensional accuracy, etc. are severe and precision is required, if the processed product is box type or cylindrical type, pour water-soluble gypsum into the space and let it dry naturally, then A precision machining method for thin-walled parts, characterized in that the hardening causes rigidity in the surrounding metal and prevents deformation during machining.