| Accompanied by the industrial modernization, the construction industry and manufacturing industry have achieved great development. The application field of diamond saw blade is still expanding, and the demand of diamond saw blades is increasing. As the result, the dynamic analysis of the circular saw blade is becoming more and more important. Circular saw blade works in high rotating speed state. It will withstand the intense interaction force with the object being cut. The service life of the saw blade will be directly affected by the local stress, operation mode and the work environment. To increase the overall stiffness and guaranteeing the service life, simulation of circular saw blade is further studied. This paper adopts the research method of topology optimization which is based on finite element. The structure of circular saw blade is optimized, and the fatigue life of circular saw blade is studied. The research contents are as follows:(1) With the help of finite element software ANSYS, the finite element model of diamond circular saw blade is built by APDL language. The prestress of circular saw blade under different rotating speeds is analyzed. The results show that the prestress of circular saw blade should not be ignored. The different modes of circular saw blade are analyzed. It is figured out that there is mode superposition in saw blade modal.(2) The load model of the circular saw blade was established. The dynamic response of circular saw blade and the variation of stresses at different points are analyzed. It is found that the maximum stress is located at tooth root.(3) Topological analysis is carried out with the variable density method of topology optimization. To ensure the overall stiffness of the structure, the structure flexibility is used as the objective function, and the volume percentage is used as constraints. Modal analysis of the new structure show that mode superposition disappeared. The dynamic response results show that the maximum stress is still located at the root of the tooth.(4) The fatigue life of circular saw blade is affected mostly by the variation of stresses. This paper uses the self-designed S-N curve of 65 Mn materials to analysis the fatigue life of saw blade. The result shows that the optimal structure has certain effects on life. |
