Mechanical cutting model of magnetic abrasive particles and analysis of experimental results

An internal magnetic abrasive finishing process is proposed for producing highly finished inner surfaces of tubes used in critical applications including clean gas or liquid piping systems. According to theories of precision machining and plastic deformation, the stress of the single magnetic abrasive grain in the inner surface magnetic abrasive finishing is analyzed. At the same time, the mechanical cutting model is established. The grinding mechanisms of magnetic abrasive grain are analyzed further. Magnetic Abrasive Finishing (MAF) setup is designed and made for finishing austenitic stainless steel tubing. By finishing force measurement experiment, magnetic forces and some parameters are related, such as exciting current, grid size, magnetic abrasive volume and different kinds of magnetic materials. On the basis of qualitative analysis effects, some key factors that effect material removal rate (MRR) are determined. Some practical methods to increase MRR are proposed by the authors.