| Summary: | Oscillating grinding is a high-efficiency machining method for crankshaft pin journal, and motion model is one of the important foundations of oscillating grinding, which heavily affects the grinding quality. This paper proposes an analysis method of oscillating grinding motion model for crankshaft pin journal, which can provide an effective tool for engineers and technicians to quickly evaluate different motion models in practice. First, the method is described by performing characteristics analysis of oscillating grinding, including the velocity characteristics at grinding point and the performance of driving axis. A complete analysis flow is also given. Then, a numerical comparison example is given between two main oscillating grinding motion models, i.e. the constant linear velocity motion model (CLVMM) and the constant angular velocity motion model (CAVMM), and the results show that the CAVMM is more practical than the CLVMM by using the proposed method. Finally, a crankshaft pin journal grinding experiment is carried out on a prototype, and the result also indicates that the CAVMM is much better in practice, which validates the effectiveness of the proposed analysis method of oscillating grinding motion model.
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