Low-temperature precision electrolytic machining method

Abstract

The invention discloses a low-temperature precision electrolytic machining method, and belongs to the field of special machining. The method is characterized in that a machining area is in a low-temperature environment, and the temperature can be as low as zero DEG C or lower; a specific electrolyte is prepared, the freezing point of the specific electrolyte is lower than zero DEG C, and thus thefluidity can still be kept in the low-temperature environment; during machining, a workpiece and a tool can be placed in the low-temperature environment, meanwhile, in order to strengthen the freezingeffect, the workpiece can be placed on a specially-made low-temperature clamp, and an inner cooling device can be installed in the tool, so that further cooling of the workpiece and the tool is realized; or an auxiliary conductive ice layer or an auxiliary non-conductive ice layer is frozen in the machining area or a non-machining area of the workpiece, and low-temperature electrolytic machiningassisted with the ice layer is carried out. Under a low-temperature condition, the ion movement capacity in a solution is weakened, the non-linearity of the electrolyte is remarkably enhanced, the electrolytic machining defects such as stray corrosion and pitting corrosion can be reduced or eliminated, and the machining locality is improved, so that precise and ultra-precise electrolytic machiningis realized.

Description

Technical field [0001] The invention relates to a low-temperature electrolytic precision machining method, which belongs to the field of special machining, in particular to a precision and ultra-precision electrolytic machining method under a low-temperature environment. Background technique [0002] With the advancement of science and technology, more and more precision parts are used in various fields, and in some specific fields, the materials of these parts are still difficult-to-process materials such as high temperature alloys and cemented carbides. The processing method puts forward high requirements. [0003] As a special processing method, electrochemical machining can easily complete the processing of difficult-to-process materials with fast processing speed and no loss of tools. However, poor machining accuracy is always a big problem. [0004] On July 29, 2015, the Chinese invention patent CN104801801A disclosed a freezing-assisted micro-hole processing method and devic...

AI Technical Summary

Problems solved by technology

Through the freezing effect, a layer of ice is formed at the exit of the workpiece, which acts as a contrast in the process of EDM-electrolytic composite machining of micro-holes, and improves the surface quality of the exit of the small hole, but the taper of the entire small hole, the quality of the hole wall and the small hole Hole inlet surface quality is still not ideal

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