Electric spark milling method

Abstract

The invention provides an electric spark milling method, which relates to the technical field of electric spark milling and comprises a trial cutting step, an on-line measurement step, a trial cutting correction step and a corrected on-line measurement step. The method comprises the following steps: firstly, executing a trial cutting step, starting from a cutter starting point by an electrode wire and a guider, performing electric spark milling on a part along a cutter feeding direction, and machining a trial cutting groove; then an online measurement step is executed, and a machining depth compensation value delta Z and an electrode loss compensation relative rate S1 are measured and calculated; then, a corrected trial cutting step is executed, a corrected tool starting point is calculated according to the delta Z, and a new round of trial cutting is completed by the electrode wire and the guider in the corrected feeding direction; and then the corrected online measurement step is executed, and a new round of delta Z and Si (i = 2, 3,...) is measured and calculated. According to the method, the electric spark milling depth can be automatically kept at a set value, and the continuity of the machining process and the precision of the depth size of a part can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of electric spark milling, in particular to an electric spark milling method for automatically keeping the machining depth at a set value, and in particular to an electric spark milling method. Background technique [0002] The EDM processing technology adopts the principle of layered milling, uses the numerical control system to control the movement trajectory of the electrode with simple shape, and servo-controls the discharge gap between the electrode and the part. At the same time, the electrode rotates at a high speed, and the electrode end faces the part. The material on the surface of the part. Unlike conventional milling techniques, the material removal depth of EDM milling is positively related to the time the electrode passes over a certain position on the part surface, so that the control of the machining depth mainly depends on experience. The method of layered milling can control the machining ...

AI Technical Summary

Problems solved by technology

In this invention, the electrode cuts into the layer to be processed in the state of side discharge, which solves the problem that under the condition of micro electric spark discharge, the effective range of the electrode end surface discharge of some electric processing systems is extremely small, so that the continuous processing cannot be continued after loss, but it cannot be supplemented. The diameter of the electrode is lost, and the width of the processing track is difficult to keep consistent; the patent measures the length of the electrode loss once to calculate the continuous compensation rate of the electrode, but due to the difference in the discharge conditions of the trial cutting process and the compensation process, especially the condition of large layer thickness The difference is even worse, so the invention still has room for improvement in terms of electrode discharge state setting and electrode compensation accuracy

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