Electrodischarge machining method for working non-conductive ceramic utilizing conductive magnetic powder

Abstract

The electro-discharge machine method for preparing nonconducting ceramics by utilizing conductive magnetic powder includes the following steps: (1) placing electromagnetic iron device on working table of electro-discharge machining machine, form of electromagnetic iron is identical to that of workpiece; (2) on the electromagnetic iron mounting and holding nonconducting ceramics; (3) on said ceramics surface spreading conductive magnetic powder; (4) using conductive magnetic powder as one end of electrode and making it and metal electrode be formed into electrode pair; (5) switching on the power supply of electromagnetic iron, the conductive magnetic powder can be adsorbed on the ceramics surface; (6) setting main electro-discharge machining parameter; and (7) making electro-discharge machining process.

Description

technical field [0001] The invention relates to a processing method in the technical field of special processing, in particular to a discharge processing method for processing non-conductive ceramics by using conductive electromagnetic powder. Background technique [0002] Discharge machining must be a thermal processing method that can only be carried out under the condition that both electrodes are electrically conductive. Since non-conductive ceramics do not have conductivity, they cannot be directly used as one of the electrode pairs for EDM. To carry out electrical discharge machining on it, the surface of the processed non-conductive ceramic workpiece must be equipped with the conditions for electrical discharge machining. Through previous studies, there are currently electric discharge machining methods for processing insulating ceramic materials. The method is to prepare a conductive film (or sheet) on the surface of the non-conductive ceramic to form a conductive ...

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Problems solved by technology

However, in the actual processing process, due to the uneven adsorption between the natural "generated conductive film" and the ceramic surface (the thickness is not uniform), the bonding performance is poor, it is easy to peel off during processing, and the thickness is naturally formed and cannot be adjusted, resulting in frequent discharge. Stable, the processing depth is relatively shallow, and it is mainly used under the condition of long pulse width, and it is not easy to be used for short pulse width, that is, finishing

On the other hand, when a batch of parts needs to be processed, a conductive metal plate (or net) must be pressed (or pasted) on the surface of each part, so the production of the auxiliary conductive film is relatively cumbersome. The equipment is more expensive, which makes the whole processing cost higher, time-consuming and labor-intensive, and there will be more restrictions on application and promotion

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