Research on flexible base discrete adhesion model of SCAPW for blade machining

Abstract

Softness consolidation abrasives pneumatic wheel (SCAPW) is a new type of flexible machining tool, and its material removal characteristics are closely related to the deformation of the rubber base and the motion contact characteristics of surface abrasives. In order to solve the precision machining problems of complex curved surfaces of SCAPW, proposing a method for establishing a flexible base discrete adhesion model for FEM-DEM coupled simulation. The research investigates the pressure distribution of SCAPW under different compression amounts, which shows a central concave basin-like distribution law. Fitting a pressure distribution equation for the machining contact area and adjusting the coefficients of the Preston equation to derive a material removal model suitable for SCAPW polishing. Finally, the appropriate processing parameters are selected for the engine blade polishing experiment based on the contour error obtained by the coordinate measuring machine. The result shows that the surface roughness of the blade is reduced by nearly 83 %, the contour error of the blade edge is reduced to less than 0.1 mm, and the number of noticeable scratches is reduced by nearly 90 %. This experiment verifies the correctness of the model and the processing effect, providing a scientific basis for the subsequent optimization of the processing technology and improving processing efficiency.