Reversed alignment electrochemical discharge machining method and device

Abstract

The invention provides a reversed alignment electrochemical discharge machining (RA-ECDM) method in the field of special machining. A tool electrode is arranged below a workpiece. The tool electrode is fixed on the bottom surface of a work slot by an electrode holder and is soaked in electrolyte solution. The workpiece is connected with a feeding device of a machine tool. The feed motion in the machining process is implemented by feeding of the workpiece. The invention also provides a corresponding device. According to the invention, by changing the relative positions between the tool electrode and the workpiece, machining scraps generated in the machining process can be easily discharged under the action of gravity, so that the flowing capacity of electrolyte in a machining process in the machining process is reinforced. Moreover, due to the adoption of the reversed layout, air bubbles generated in the electrolytic reaction can be concentrated around the end part of the electrode below the machined workpiece to form a stable air film, so that the stability and the machining depth of the ECDM are effectively improved.

Description

technical field [0001] The invention relates to a technical method for micromachining non-conductive brittle materials in the field of special processing, specifically a method for processing non-conductive brittle materials by combining electrochemical technology and electric spark technology and utilizing heat energy and chemical corrosion generated by spark discharge of a new method. Background technique [0002] In recent years, non-conductive brittle materials such as various glasses and ceramics have been widely used. Glass materials have the characteristics of chemical corrosion resistance, transparency, low conductivity and good biocompatibility, so they are used in micro-accelerators, micro-reactors, micro-pumps, medical devices and optical systems; ceramic materials have high strength, Excellent properties such as high hardness, high temperature resistance, wear resistance, corrosion resistance, and good insulation have increasingly shown broad application prospec...

AI Technical Summary

Problems solved by technology

However, when the processing exceeds a certain depth (about 300 μm), the processing speed of electrochemical discharge machining (ECDM) drops to a few microns per second or even stops, and the processing depth is difficult to exceed 500 μm

The main reason for this situation is that as the depth of electrochemical discharge machining (ECDM) increases, the renewal of the electrolyte solution between the electrode end and the workpiece becomes difficult, and the bubbles generated by the electrolytic reaction play a role in the buoyancy It is difficult to form a stable gas film at the end of the tool electrode

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