Spiral microelectrode electrochemical machining system and method

Abstract

The invention discloses a spiral microelectrode electrochemical machining system and method. A processing electrode is arranged at the front end of an electric spindle and is straightened, and the processing electrode and a cathode metal circular ring are connected with a positive electrode and a negative electrode of a direct-current power supply; the electric spindle is controlled to drive the processing electrode to move to enable the processing electrode to penetrate through a cathode metal ring to a certain distance, and a tool is subjected to tool setting, so that an anode workpiece is positioned in the center of a metal ring, and the electrolyte is dripped to enable the anode workpiece to form a liquid film on the metal ring; the electric spindle is controlled to rotate, and the processing electrode at the front end of the electric spindle is driven to rotate at a high rotating speed; and the power supply is switched on, the current signal is detected, the current signal is fedback to a control system, the voltage of the direct-current power supply is controlled, the current density is guaranteed to be within a certain range, a spiral groove is formed in the surface of theelectrode, and electrochemical polishing is carried out. The method is simple in process, feeding is not needed in the etching process, and a spiral groove is formed once.

Description

technical field [0001] The invention relates to a spiral microelectrode electrochemical processing system and method. Background technique [0002] With the demand for miniaturization of product components, the size of the processed micro-holes and micro-grooves is getting smaller and smaller, and higher requirements are placed on processing tools. Due to its small size, good chip removal performance, high processing efficiency and high processing quality, the spiral columnar microelectrode is widely used in the fields of micro-electrolysis, micro-electrolysis EDM and mechanical drilling such as PCB. [0003] At present, the important processing technology of spiral microelectrodes within Φ100μm is mainly mastered in Japan and other countries. Domestic enterprises that can produce spiral microelectrodes mostly use imported CNC machine tools with relatively expensive prices. Therefore, the price of spiral columnar microelectrodes smaller than Φ100μm on the market is also low....

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Problems solved by technology

[0006] The Chinese invention patent "CN201510870824-Electrochemical processing device and processing method" proposes a method for preparing a spiral electrode; however, since the initial diameter of the columnar workpiece for processing the electrode is several hundred microns, if the diameter of the processed electrode is small, near the liquid surface The diameter of the electrode changes from hundreds of microns to tens of microns. The stress concentration in this part is prone to fracture under the action of gravity and centrifugal force. Therefore, the spiral electrode prepared by this method has a large size.

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