Multi-dimensional ultrasonic ELID grinding machining device for inner raceway of bearing

Abstract

A multi-dimensional ultrasonic ELID grinding machining bearing inner raceway device comprises a cutter ultrasonic part, an ELID finishing part, a workpiece ultrasonic part, a workpiece clamping part and a forming grinding wheel. The cutter ultrasonic part is connected with a machine tool spindle through a cutter handle, the machine tool spindle is arranged vertically downwards, and a forming grinding wheel is fixedly arranged at the lower end of the cutter ultrasonic part to achieve additional ultrasonic vibration on the forming grinding wheel. Two electrodes of the ELID dressing part are connected with the center and the circumferential edge of the formed grinding wheel correspondingly, and online electrolytic dressing of the formed grinding wheel is achieved. The workpiece ultrasonic part is fixed to a machine tool workbench, and the workpiece clamping part is arranged on the workpiece ultrasonic part to achieve addition of workpiece ultrasonic vibration. The precise grinding of the inner raceway of the bearing can be completed, and meanwhile, the machining efficiency and the machining quality of the workpiece can be greatly improved through the addition of the multi-dimensional ultrasonic action of the cutter and the workpiece, so that the super grinding machining of the precise inner raceway of the bearing is realized.

Description

technical field [0001] The invention belongs to the technical field of bearing strengthening processing, and in particular relates to a multi-dimensional ultrasonic ELID grinding and processing bearing inner raceway device. Background technique [0002] High-precision bearings play an important role in the normal operation of aerospace engines, high-precision machine tools, high-speed railways, and high-precision instruments. The bearing ring groove is the working surface of the bearing, and its shape accuracy and surface quality affect the bearing's accuracy, service life, vibration and other performance. At present, the machining process of bearing ring raceway is mainly forming grinding. The forming and grinding process of bearing raceway raceway has become an effective way to process high-precision bearings. The heat is not easy to reduce, and the grinding debris is easy to scratch the surface of the grinding wheel and the workpiece, causing the grinding wheel to be blo...

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Problems solved by technology

[0003] The surface quality of ELID grinding is high. Using ELID forming grinding can effectively deal with multi-variety and small batches of high-precision bearing ring channel forming grinding surfaces, realize online dressing of grinding wheels, and reduce the manufacturing cost of high-precision bearings. The processing efficiency is low, and it is impossible to strengthen the raceway of the inner and outer rings of the bearing to improve its fatigue life

[0004] Existing surface strengthening technologies, such as shot peening, sandblasting or ultrasonic shot peening, etc., have a limited depth of strengthening layer and make the working surface roughness of the bearing raceway relatively high. In order to ensure the roughness of the working surface of the bearing, it is necessary to Grinding or abrasive processing of the sand surface, which removes the strengthening layer and loses the strengthening effect

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