Method for polishing circular stainless-steel accurate parts on old machine tool

Abstract

The invention provides a method for polishing an annular stainless steel precise part in an old machine tool, which is applied to the mechanical manufacturing industry. On the premise of not influencing the precision of the dimension of the prior part, the method can ensure that the surface of the part achieves higher luminance brightness and keeps a necessary acute angle. The method is characterized in that a specially-made polishing rod is used; one end of the polishing rod is clamped on a three-claw chuck of a mainshaft of an old cylindrical grinding machine or a common lathe; after spacer rings and a plurality of polished parts are sleeved on the polishing rod, and limit sleeves are mounted; a loose clamp arranged on a tail rack of the machine tool tightly clamps the other end of the polishing rod; a soft cloth polishing wheel is arranged on a grinding wheel machine and is positioned between the three-claw chuck and the loose clamp; after the startup, the soft cloth polishing wheel and the polishing rod clamped on the three-claw chuck rotate along clockwise direction; and the position of the soft cloth polishing wheel rotating at high-speed and the acting force between the soft cloth polishing wheel and the polished part are adjusted so as to implement the inner, the outer and the bilateral soft polishing to the polished part between the three-claw chuck and the loose clamp, thereby achieving the aim of polishing.

Description

Technical field: [0001] The invention relates to a polishing technology in mechanical processing, in particular to a process method for surface polishing of a small circular stainless steel precision part, which achieves a bright surface and maintains a necessary acute angle without affecting the dimensional accuracy of the part. Background technique: [0002] In order to improve the performance or appearance quality of the products, many precision parts of small circular stainless steel need to be polished to obtain higher surface roughness and brightness without affecting the dimensional accuracy of the original parts. For example, the rear ferrule, an important part of the stainless steel double ferrule pipe joint, is a typical case. It needs to obtain a surface hardness layer through heat treatment (the thickness of the hard layer is only 0.025-0.05mm). Excellent surface roughness and brightness, but also maintain a sharper edge (acute angle). Polishing is required due ...

AI Technical Summary

Problems solved by technology

There are many common polishing methods. One is to use chemical or electrolytic polishing methods. Due to chemical or electrolytic effects, a certain amount of corrosion is caused to the surface of the polished part. The general corrosion amount is 0.03 to 0.08 mm. The hardness layer is corroded; the second is to adopt mechanical vibration polishing method, because the high-hardness polishing material will grind the sharp edge (acute angle) of the polished part; the third is to use traditional manual polishing, which not only has low work efficiency, but also causes deformed and damaged

None of the above methods can meet the requirements

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