Abstract: A pneumatic wheel tool based on softness-consolidation abrasives (SCA) is presented. Mechanical characteristic of SCA is analysed for improving the efficiency of finishing proces when it faced with the laser hardening surface. The normal and shear microstress is established by the analysis of the soft ball model. According to the global damp coefficient, the formulas of displacement and velocity of SCA are given in the process of creep deformation of SCA, which is proved out by the PFC3D. The stress net of SCA is also simulated. The creep deformation of SCA is confirmed in accordance with the analysis of vz of the single particle. Combined with the modified Preston formula, the experiments about the material removal are carried out to the laser hardening freeform surface. The results show that the material removal rate of SCA is higher than the free abrasive’s by 34.35%. And it also can avoid the deep scratches which are always produced by the grinding with the rigid wheel on the freeform surface. SCA is certified to improve the efficiency of the finishing process to the laser hardening freeform surface.

Key words: pneumatic wheel;creep deformation;materials removal rate;softness consolidation abrasives