Online preparing system and method for electrochemical grinding micro tool for line electrode

Abstract

The invention relates to online preparing system and method for an electrochemical grinding micro tool for a line electrode, belonging to the field of micro electrochemical machining. A microscale line electrode is fixed in an electrolyte tank and is tensioned by a micro tension device, and a tool electrode is connected onto a numerical-control rotary main shaft; the electrolyte tank is filled with electrolyte, the microscale line electrode and the tool electrode are immersed in the electrolyte, both the microscale line electrode and the tool electrode maintain a machining gap, and a pulse width power supply is connected; and by utilizing a principle that metal generates electrochemical anodic dissolution in the electrolyte, the tool electrode is corroded for molding. In the machining process, the numerical-control rotary main shaft is utilized to enable the tool electrode to generate rotation of certain angular speed or perform indexing, meanwhile a three-axis motion platform is utilized to generate uniform-speed feeding in a Z-axis direction so as to obtain the micro tool with a needed section shape. In size control, a current sensor is used for collecting and machining current in a loop, the size change of tungsten filaments in the corrosion process is reflected by utilizing the corresponding relationship of machining current and tungsten filament resistance, and therefore the size is accurately controlled.

Description

technical field [0001] The invention relates to a method and system for preparing microtools on-line by electrochemical grinding of wire electrodes, belonging to the field of microelectrochemical processing. Background technique [0002] Micro-electrochemical machining is a technology based on the principle of electrochemical ion removal to dissolve workpieces in a small amount. In theory, it can reach nanometer-level machining accuracy. Micro-electrochemical machining is non-contact machining, with good surface quality and no tool loss. It is an ideal micro-machining method. At present, micro-electrochemical machining with micron-level removal has been realized abroad. [0003] In the past ten years, western industrialized countries have attached great importance to micro-electrochemical manufacturing technology, invested a lot of research and made great progress. R.Schuster, V.Kirchner and others from the Max Planck Institute in Germany used ultra-short pulse current with...

AI Technical Summary

Problems solved by technology

In the test, the tungsten wire is positioned on the center line of the stainless steel cylinder filled with NaOH solution. The stainless steel cylinder as the cathode ensures that the radial electric field of the wire electrode is uniform, and the wire electrode corrodes uniformly in the radial direction during processing, so , this method can only prepare cylindrical wire electrodes

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