A method of electrode loss compensation in EDM based on reverse forming principle

Abstract

The invention discloses an electrical discharge machining electrode loss compensation method based on the opposite-forming principle. Before machining, a required electrode initial shape is reasoned out conversely according to a required ideal shape of a target workpiece and by the means of the electrode loss mechanism. The workpiece with the required ideal shape can be exactly machined out after electrical discharge machining of the electrode with the shape is accomplished and loss is caused. Namely, pre-deformation is performed on the electrode which is originally of the ideal target shape so as to offset the impact of the electrode loss and achieve the purpose of electrode compensation. In order to obtain the original shape of the deformed electrode, only the workpiece with the target shape is needed to be transformed to an electrode, the corresponding electrode is transformed to a workpiece, machining simulation is performed conversely, and the initial shape of the electrode can be obtained after electrical discharge machining procedures as same in normal electrical discharge machining are accomplished.

Description

technical field [0001] The invention belongs to the field of special processing, in particular to a method for off-line prediction and compensation of electrode loss in electric spark processing. Background technique [0002] Electric discharge machining (EDM), as a special machining method, has a wide range of applications in the industrial field. Its most important feature is to use the instantaneous discharge to generate a large amount of heat to etch the material without paying attention to the hardness of the material; at the same time, because this processing method is non-contact processing, there is no mechanical stress, deformation and other problems, so in ultra- It has unique advantages in the processing of hard and difficult-to-machine materials, deep holes, narrow grooves, etc., and is widely used in mold manufacturing, aerospace, automotive and other fields. [0003] However, due to the inevitable existence of electrode loss, especially at the edge and sharp c...

AI Technical Summary

Problems solved by technology

However, on the one hand, this method is highly dependent on experience, the reliability is not high, and the compensation accuracy is difficult to control; on the other hand, the production of electrodes is time-consuming, laborious, and the cycle is long, and the production cost of complex electrodes is high.

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