Milling type electrical discharge machining device for self-repairing tool electrode and method

Abstract

The invention discloses a milling type electrical discharge machining device for a self-repairing tool electrode and a method. The device mainly comprises a tool electrode and a metal block, wherein the tool electrode comprises a metal substrate and an abrasive grain layer fixedly jointed on the surface of the metal substrate through a conductive abrasive grain binding agent; the tool electrode is capable of rotating around a self-axis and can move relative to a workpiece; the metal block is compressed on the abrasive grain layer of the tool electrode. In a use process, the metal block is milled by the rotating tool electrode; the chippings generated in the milling process are adhered to the abrasive grain layer of the tool electrode, so that a metal adhesion layer is formed; the adhesion layer is utilized to perform discharge machining; in the machining process, the loss of the adhesion layer is caused by the spark effect, but the lost adhesion layer is supplemented and reconstructed by the tool electrode in the manner of re-milling the metal block, so that the geometrical shape of the tool electrode can be timely recovered; the service life of the tool electrode is undoubtedly prolonged, the machining precision is increased and the machining cost is lowered.

Description

technical field [0001] The invention relates to the technical field of machining equipment, in particular to a self-repairing tool electrode milling electric discharge machining device and method. Background technique [0002] Milling is used in machining to process the plane or curved surface of the workpiece. The surface after milling is often an important surface in mechanical parts. These surfaces often have strict requirements on processing accuracy and processing quality. [0003] The traditional milling process is to use a higher hardness object as a tool to cut a softer object, and remove the excess material on the surface of the workpiece to be processed by extrusion, so that the workpiece can reach the specified geometric shape, dimensional accuracy and surface quality processing methods. With the development of science and technology, materials with excellent performance are used in many advanced equipment, such as high-temperature alloys, stainless steel, tita...

AI Technical Summary

Problems solved by technology

Although it has the advantages of no cathode loss, no macro cutting force, suitable for processing various difficult-to-cut materials and thin-walled parts, high processing efficiency, and good surface quality during processing, its localization is not easy to control, and it is prone to miscellaneous Scattering corrosion is not conducive to ensuring the machining accuracy. EDM milling is to use standard-shaped electrodes to perform spark discharge machining on the workpiece, so as to remove the metal in the area to be processed, so that the workpiece can reach the specified geometric shape, dimensional accuracy and surface quality. processing methods

Although this method can process conductive materials with any hardness, because the process is electric discharge machining, the electrode itself will be damaged while machining the workpiece, which will undoubtedly greatly affect the machining accuracy and quality. Therefore, how to provide a method for The processing of superhard materials has the following advantages: high processing precision, long service life, and low processing cost. The milling processing method has become an important technical problem to be solved urgently by those skilled in the art.

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