Development of a Shear-Type Dynamometer for High-Temperature Environment

To improve the accuracy of cutting force measurement and solve the problem of temperature interference in the cutting process, this paper proposes a new four-dimensional force measurement method that uses only y0-type quartz wafers. Firstly, put forward several arrangements of wafers, and establish the output efficiency model of different arrangement schemes. With the goal of maximum output efficiency, determine the optimal arrangement of the wafers. Subsequently, design two kinds of TDTD shear-type piezoelectric sensors, and obtain the performance of the sensor through calibration experiments. The structure of the dynamometer was optimized by using the finite element method. To obtain the lateral output efficiency of the dynamometer, a sensor stiffness measurement experiment was carried out. Finally, static calibration experiments and heat-force calibration experiments were performed on the new dynamometer, and a matrix was established to achieve crosstalk elimination. The experimental results show that the output error and crosstalk of the dynamometer are both < 0.5% at room temperature. The output error is < 1.23 (FS), and the crosstalk is < 3.4% at high temperatures. Compared with the existing research, the new force measurement method proposed in this paper has better accuracy. The new type of dynamometer could provide accurate data for future intelligent manufacturing, and has broad application prospects.