Electrochemical discharge-grinding combined machining tool and using method thereof

Abstract

The invention discloses an electrochemical discharge-grinding combined machining tool which comprises a tool base body, an insulating abrasive particle layer used for grinding machining and a conductive copper sheet used for electrochemical discharge machining, the tool base body is cylindrical and comprises an arc-shaped side wall and a plane side wall connected with the arc-shaped side wall, and the insulating abrasive particle layer is arranged on the plane side wall. The insulating abrasive particle layer covers the arc-shaped side wall, and the conductive copper sheet is attached to the plane side wall in the length direction of the plane side wall. The invention further discloses a using method of the electrochemical discharge-grinding combined machining tool. The method has the beneficial effects that the defects of traditional electrochemical discharge machining are overcome, the advantages of electrochemical discharge machining and grinding machining are combined, the method has the beneficial effects of being high in machining efficiency, good in machining surface quality, high in machining precision and the like, the defects of some traditional electrochemical discharge-grinding combined machining are overcome, and the machining efficiency is improved. The method has the advantages of wide machining application range, large machining depth-diameter ratio, compensable machining loss and the like.

Description

【Technical field】 [0001] The invention relates to the technical field of electrochemical discharge-grinding composite processing, in particular to an electrochemical discharge-grinding composite processing tool composed of a conductive copper sheet and a grinding rod with a non-conductive abrasive layer and a method for using the same. 【Background technique】 [0002] Alumina, silicon carbide and other ceramic materials are widely used in aerospace, electronics and automobile manufacturing due to their high melting point, high hardness, high wear resistance, and oxidation resistance. However, these ceramic materials are difficult to machine due to their high hardness and brittleness. [0003] Due to the unique physical and chemical properties of this difficult-to-machine hard and brittle material, traditional processing methods such as grinding and milling have a low material removal rate and are prone to fracture and chipping. Special processing methods, such as laser proce...

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Problems solved by technology

[0004] It can be seen that the traditional electrochemical discharge machining has the following disadvantages: (1) The quality of the machined surface is poor; (2) The surface of the workpiece to be machined will produce a metamorphic layer and microcracks; (3) The machining accuracy is difficult to control

Aiming at the shortcomings of traditional electrochemical discharge machining, a composite machining method combining electrochemical discharge and grinding has been proposed. This composite machining method can effectively remove the surface degenerated layer produced in EDM. However, This processing method also has some disadvantages that are difficult to solve

[0005] Disadvantages of the traditional electrochemical discharge-grinding composite processing method: (1) the discharge is concentrated on the same electrode, the electrode wear is serious, the abrasive particles are easy to fall off, and the processing accuracy and surface quality are difficult to guarantee; (2) it cannot withstand high voltage and large energy discharge, Hard, brittle, and non-conductive materials with high melting points that are difficult to process cannot be effectively processed, which limits the application of this composite processing method. (3) Electrode loss occurs on the side wall and bottom of the electrode at the same time, and electrode compensation is difficult, making it difficult to guarantee the depth and radial dimensions.

(4) The traditional rod-shaped electrode has no electrolyte circulation channel, and it is difficult for the electrolyte to enter the processing area during deep processing, and it is difficult to discharge the processed products. The processing efficiency is low, and processing with a large depth-to-diameter ratio cannot be performed.

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