Design and development of bearing ring raceway grinding machine with grinding instead of lapping

In view of the serious wear of grinding tools and scattered processing equipment in the high-end bearing ring raceway precision and ultra precision machining in China, which leads to large assembly error, resulting in the fatal defects of low surface precision, poor quality and difficult to guarantee the quality consistency of bearing ring raceway machining, based on the ELID forming grinding processing technology and integrated manufacturing concept, this paper introduces the ELID forming grinding processing technology, A design scheme of a special machine tool for high-end bearing ring raceway forminggrinding machine with grinding instead of lapping is proposed.The grinding wheel in-situ EDM dressing and online ELID electrolytic dressing are realized, and the precision forming grinding of bearing ring raceway is completed by one clamping.The processing experiments on the developed testing machine show that the processing efficiency is about 40~50 seconds/piece, and the dimension deviation is 1.5 μm, the scatter is less than 2 μm, the surface roughness is controlled within Ra12~17 nm, the surface compressive stress is about 750 MPa, which can meet the high efficiency, high precision and high consistency of high-end bearings.