High-stability inner cavity electrolytic grinding machining device and method

Abstract

The invention discloses a high-stability inner cavity electrolytic grinding machining device and a method. The high-stability inner cavity electrolytic grinding machining device and the method can be used for ultra-precision machining of the inner surfaces of hole parts, irregular inner cavity revolution surfaces and the like. According to the high-stability inner cavity electrolytic grinding machining device, based on elastic force generated by elastic deformation of a spring, a cathode roller, a grinding wheel strip and oilstone are sequentially attached to the inner surface of a workpiece in the anticlockwise direction, the surface of the workpiece is softened through the electrolytic action of a cathode and the workpiece, then the grinding wheel strip is used for grinding a softened layer, and the oilstone is used for finish machining in sequence, therefore, the surface precision of an inner cavity is obviously improved, the jumping of the cathode roller is reduced, and the machining stability is improved; according to the device, the machining precision of the inner cavity is effectively improved, the machining stability of the inner cavity is remarkably improved, the problems that the cathode needs to be replaced when the radius of conventional inner cavity electrolytic grinding machining is changed, and short-circuit burning of the cathode is caused by unstable machining are solved, and meanwhile, the machining efficiency of the inner cavity is also improved; and the high-stability inner cavity electrolytic grinding machining device is novel in structure and safe and convenient to use.

Description

technical field [0001] The invention belongs to the field of high-precision electrolytic grinding processing equipment for mechanical parts, and can be used for high-efficiency, high-precision and high-stability grinding of inner cavity surfaces of various conductive material parts. Background technique [0002] High-precision machining of inner cavities of parts has always been one of the difficult problems in the field of mechanical processing, especially for some non-circular inner cavity surfaces. The machining accuracy determines the fatigue life of mechanical parts and the safety and stability of related structures. Due to the narrow space of the surface processing of the inner cavity of the part, it is difficult for the grinding fluid of the traditional grinding process to enter the inner cavity space, resulting in burns on the surface of the workpiece, and further deteriorating the surface accuracy of the inner cavity surface processing. In addition, in order to impr...

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Problems solved by technology

Due to the narrow space of the surface processing of the inner cavity of the part, it is difficult for the grinding fluid of the traditional grinding process to enter the inner cavity space, resulting in burns on the surface of the workpiece, and further deteriorating the surface accuracy of the inner cavity surface processing

In addition, in order to improve the processing efficiency of the inner cavity surface, the traditional grinding process needs to increase the grinding feed, thereby increasing the grinding force, which further leads to the deterioration of the processing stability and the large error of the shape accuracy of the workpiece

[0003] Due to the increasing radius of the workpiece during inner cavity processing, in order to prevent short circuit, the general electrolytic grinding process needs to replace the cathode, and the surface roughness of the workpiece is relatively large due to reasons such as the mismatch between its electrolytic parameters and mechanical grinding, which further leads to its The stability of the process deteriorates, and finally the machining accuracy and efficiency of the workpiece are affected

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