Method for making holes through electric spark-electrolysis combination via matching of thread pipe electrode with inner and outer liquid flushing

Abstract

The invention provides a method for making holes through electric spark-electrolysis combination via matching of thread pipe electrode with inner and outer liquid flushing. At the electric spark high-speed hole making machining stage, an electric spark pulse power source is connected, the inner liquid flushing manner is adopted for leading in of deionized water, in cooperation with rotation of thethread pipe electrode, meanwhile, downward feeding is carried out, when the interpolar distance is up to the electric spark discharge gap, a pulse electric spark is generated, a workpiece material issubjected to corrosion removing, through thread rotation disturbance and upward action force of a thread groove on electric corrosion solid small particles, the electric corrosion solid small particles can be rapidly and upwards discharged, when a workpiece is subjected to breakdown, the electrode station is kept unchangeable, an electrolysis power source is connected, outer liquid flushing is replaced, an outer nozzle is aligned with the gap to spray an electrolyte, in cooperation with reverse rotation of the thread pipe electrode, the thread groove can contain more electrolyte to enter thenarrow and small gap, the workpiece has the anodic dissolution reaction, electrolytic flocs can be rapidly and downwards discharged under extrusion of the thread groove, micro hole manufacturing highprecision and high efficiency can be ensured, and the hole wall non-micro-crack and non-recast-layer machining needs can be achieved.

Description

technical field [0001] The invention relates to the technical field of special processing, in particular to a combined hole-making method of electric spark-electrolysis combined with internal and external flushing liquid for threaded pipe electrodes. Background technique [0002] With the continuous development of aviation, aerospace and other fields, there are a large number of tiny holes on the key parts of its products, such as the film cooling holes of the turbine blades of the aeroengine, the holes of the combustion chamber flame tube, the engine fuel injector, the sealing ring, etc. The micro-holes and group holes have the characteristics of small size, large number, high precision, no recast layer and micro-cracks on the machined surface, and most of the materials used are difficult-to-machine materials such as cast high-temperature alloys, titanium alloys, and cobalt-based alloys. Therefore, , Micro hole machining for small size, high precision, high efficiency, and ...

AI Technical Summary

Problems solved by technology

However, the small gaps in the micro-pores themselves have the problem of electric erosion and small solid particles that are difficult to discharge, and the introduction of abrasives will aggravate this problem, and the stability of the processing process is difficult to guarantee.

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