Optimization for internal traverse grinding of valves based on wheel deflection

Internal traverse grinding (ITG) has shown its great potential in precision machining of valves in fuel supply systems. When grinding such valves, long grinding wheels with small diameter are necessary. However, the poor stiffness of grinding wheels causes large deflection of wheel quill during grinding, resulting in deviation between nominal radial feed and actual radial feed, finally reducing the grinding efficiency and consistency of ground parts. In this study, an analytical model on wheel quill deflection was built. Then, a series of ITG tests were conducted to calibrate and validate the model. The results demonstrated that the model showed good accuracy. Furthermore, based on this model, an effective feeding strategy with rapid feed and over feed was proposed to improve the grinding efficiency of ITG.