Pipe electrode with flexible supporting function and function of promoting discharge of machined products and small deep hole electrical machining method thereof

Abstract

The invention provides a pipe electrode with a flexible supporting function and a function of promoting discharge of machined products and a small deep hole electrical machining method thereof. Oblique through holes uniformly distributed in a ring-shaped array manner are machined in one or more cross section side walls, distancing from the machining end face by a certain distance, of the pipe electrode. In the machining process, working liquid with certain pressure is sprayed out from the end face of the pipe electrode to carry out electrical hole machining, meanwhile, the oblique holes in theside walls close to the end face of the pipe electrode spray out working liquid with certain pressure, the working liquid sprayed out from the oblique holes and the inner walls of machined holes affect mutually, thus the upper end face of the pipe electrode is in a fixed supporting state, and the machining end face is in a flexible supporting state. When the center of the end face of the pipe electrode is eccentric, under the effect of flexible supporting force, it can be ensured that the axis of the end face of the pipe electrode and the axis of the machined holes are restored to the coaxialstate, and the straightness of the machined small deep holes is ensured. Meanwhile, the working liquid sprayed out from the through holes oblique upwards has a negative pressure sucking function in amachining side gap, and the products in the machining gap are promoted to be discharged in time. According to the pipe electrode, by changing the structure of the pipe electrode, the straightness ofthe machined small deep holes is ensured, discharging of the machined products is promoted, and the machining stability is improved.

Description

technical field [0001] The invention relates to a tube electrode which has flexible support and promotes the discharge of processed products and a deep hole electrical processing method thereof, which belongs to the field of special processing. Background technique [0002] In the mold, automobile, aerospace and other fields, there are many deep and small holes with large depth-to-diameter ratios that need to be processed, and some holes are often processed by tube electrodes. Since the clamping end of the tube electrode is fixed, it is a single-supported cantilever beam structure. When the processing depth is large, the center line of the tube electrode is prone to deflection due to various disturbance factors, and it is difficult to control it during the processing. centerline of the tube electrode, as figure 1 shown. In addition, as the processing depth increases, the discharge of processed products becomes more difficult, and the processing stability deteriorates. The...

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Problems solved by technology

Since the clamping end of the tube electrode is fixed, it is a single-supported cantilever beam structure. When the processing depth is large, the center line of the tube electrode is prone to deflection due to various disturbance factors, and it is difficult to control it during the processing. centerline of the tube electrode, as figure 1 shown

In addition, as the processing depth increases, the discharge of processed products becomes more difficult and the processing stability deteriorates

The above problems limit the application of tube electrode electric machining method in small hole machining

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