High-precision micro hole machining method and device

Abstract

The invention discloses a high-precision micro hole machining method and device. The method comprises the following steps: (1) punching electrolyte is mixed; and the electrolyte is introduced into a needle through a pushing pump for positioning a punching position; (2) the electrolyte at the tip of the needle is controlled to form micro liquid beads to contact with the surfaces of materials; and the distances from the tip of the needle to the surfaces of the machined materials and the sizes of the micro liquid beads are adjusted to control the sizes of the contacted surfaces to be equal to thepunching sizes; (3) constant-current voltage is applied to two ends of the needle and the machined materials; and the contacted parts of the micro liquid beads with the machining materials are electrolytically corroded; and (4) along with increment of the corrosion depth, the distances from the tip of the needle to different corrosion layers are maintained invariable, and the pushing pump is adjusted to return and compensate the micro liquid beads, so that the internal concentration of the micro liquid balls is to be balanced, the sizes of the liquid beads are maintained stable, and the wholemicro hole machining process is finished. The punching mode belongs to normal-temperature punching without generating such problems as secondary crystallization and cracking; and the present punchingsizes can reach 10 microns.

Description

technical field [0001] The invention belongs to the technical field of microhole processing, and relates to a high-precision microhole processing method, in particular to a high-precision microhole processing method and device based on the principle of electrolysis. Background technique [0002] With the rapid development of my country's aerospace industry, there are more and more processing requirements for precision parts, and the research on hole processing is becoming more and more extensive. This is because the processing accuracy and ability of micro holes directly affect engine nozzles, atomizers, and air film holes. And other important component performance indicators, while micropores are also used in precision molds, medical equipment, electronic parts and other fields. According to foreign standards, micropores with a pore size ranging from 0.01 to 0.1mm, submicropores ranging from 0.001 to 0.012mm, and ultramicropores less than 0.001mm. At present, domestic hole ...

AI Technical Summary

Problems solved by technology

[0005] The existing micro-hole processing methods will generate high temperature and have a lot of negative effects on the processed materials. For example, when using the EDM process to drill holes for single-crystal engine blades, it is necessary to precisely control the processing temperature, otherwise it will cause polycrystalline recrystallization of single-crystal blades. Or defects and other adverse results, so that the life of the blade is greatly reduced

Therefore, the existing micro-hole processing technology has adverse factors of damage to raw materials, burying hidden dangers to the performance guarantee of raw materials, and the processing cost also increases accordingly, and the processing efficiency also decreases.

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