关键词: 游离磨粒, 光整加工, 边界约束, 材料去除机理, 创成机理, 微观形貌

Abstract: A novel abrasive jet finishing process with grinding wheel as restraint is proposed to solve the actual problem that after grinding process the surface layer defects were often found on workpiece and, therefore, important parts were thus required to finish or polish again after grinding so as to remove the surface layer defects and diminish roughness and rippled grinding cracks. Integrating grinding process and abrasive jet process into one features the process proposed. Discussing some existing surface finishing processes, the generating mechanism of surface morphology finished by the novel process was investigated. In such a process the energized free abrasive in wedge-like zone which polish, wipe off, cut off even plough shallowly the workpiece surface material, are the core factor in material removal. On the other hand, the lateral extrusion of abrasive fluid is the main factor of homogenizing and lowering ripples. Testing results showed that the process is efficient to remove the plastic deformation due to overmachining, reduce surface roughness and homogenize ripples. It is theoretically important and practical to precision finishing process in metal working.