Structure Parameters Optimization Of Three-Dimensional Dynamic Cutting Dynamometer

Dynamometer is one of the key equipment of dynamic monitoring of multi-dimensional load. How to make high dynamic measurement accuracy and high stiffness optimized is the resistance strain dynamometer focus of the study. At present, the design of the optimization of structural parameters introduced on the dynamometer is very few both at home and abroad, therefore, study of optimization of structural parameters of multi-dimensional and dynamic cutting dynamometer is necessary.The elastic member is a core component of the sensor, its design and manufacture will directly affect the performance and reliability of sensors. With the CAD / CAE, the parametric design of structure of the elastic member of the sensor can be done precisely, the distribution of force and deformation, rationality of the location of strain gauge layout and the effect of the structural parameters on the properties of elastic member can be understood more roundly, so as to provide reliable and effective means of optimizing the design of the sensor.In this paper, on the basis of in-depth understanding of the process of turning, the improvement in form on the three-dimensional dynamic structural turning dynamometer has been done before the structure parameter optimization. The original three-dimensional cutting dynamometer in a cutter-pole mode has some disadvantages such as inconvenience in use and the signal in haul-press direction is weak. For those disadvantages, the structure of the elastic member has been improved and mechanical analysis and modal analysis has been done. Through the study of the static performance, the composite object function of rigidity and sensitivity has been established. And the object function has been optimized with the help of Finite Element Analysis, the integrated optimal solution of the sensitivity and stiffness has been obtained. At last, the topology optimization has been done for the elastic member of dynamometer, the natural frequency has been increased.In this paper, it provides a scientific basis for the strain dynamometer design that the relationship between static indicators, dynamic indicators of the strain dynamometer and structural parameters of the elastic member has been established. With the combination of theory and simulation analysis, parameterized model are verified to ensure the reasonableness of the model. Two methods were used for structural optimization of the elastic member of the strain dynamometer, a very accurate optimization results are obtained. And it provide a solution for the problem of conflicts of the stiffness and sensitivity. The topology optimization has been done for the elastic member, a very good result of the analysis has been obtained. It provided a good way to increase the natural frequency and improve the utilization rate of materials.