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针对温度对回转体测量机测量精度所产生的影响,结合ANSYS软件仿真及数学计算的方法研究了回转体测量机受温度影响产生的热变形及测量误差,分析了回转体测量机温度误差的主要表现形式.建立了一个以测量架在x方向上的平移和在z方向的倾斜为基础的误差补偿数学模型.采用双环法对测量机温度误差进行了补偿,进行了对比测量实验,实验中分别测量工件上下两个参考圆环的参数,再利用提出的数学补偿模型公式得出工件自身的误差结果,继而对测量结果进行补偿.实验数据显示:温度误差补偿模型合理有效,测量机的重复性误差从100μm以上下降为16μm左右,提出的温度误差补偿模型可以有效降低温度对测量机测量精度的影响,经过误差补偿后的测量机可适用于温度变化环境下的测量.
Aiming at the influence of temperature on the measurement accuracy of rotary body measuring machine, the thermal deformation and measurement error of rotary measuring machine affected by temperature were studied with ANSYS software simulation and mathematical calculation. The main errors of temperature measurement of rotary measuring machine were analyzed. A mathematical model of error compensation based on the translation of the measuring frame in the x direction and the tilt in the z direction was established.The double loop method was used to compensate the temperature error of the measuring machine and the contrast measurement experiments were carried out, Measuring the parameters of the upper and lower reference rings of the workpiece, and then using the proposed mathematical compensation model formula to derive the error results of the workpiece itself, and then compensate the measurement results.Experimental data show that the temperature error compensation model is reasonable and effective, the measuring machine repeatability The error is reduced from above 100μm to about 16μm. The proposed temperature error compensation model can effectively reduce the influence of temperature on the measurement accuracy of the measuring machine. The error compensated measuring machine is suitable for the measurement under the temperature change environment.