数控车床热误差实时补偿研究

热误差是数控加工中的主要误差源之一,对零件加工精度有非常大的影响。对数控车床热误差进行补偿可以有效地提高机床的加工精度。在数控车床的加工过程中,采用铂电阻温度传感器对数控加工中关键点的温度进行实时测量,再配合线性回归理论建立数控车床的热误差模型。最后根据热误差模型对数控车床的加工误差进行实时补偿,经验证该技术是可靠有效的。

Study on Real Time Compensation of Thermal Error for CNC Lathe

Thermal error is one of the main error sources in CNC machining, and it has a great influence on the machining accu-racy of parts.The thermal error compensation of CNC lathe can effectively improve the machining accuracy of machine tools.The tem-perature of the key points in CNC machining was real-time measured by platinum resistance temperature sensor.And the thermal error model was established by means of the fit of the measured temperature and linear regression theory.According to the thermal error mod-el, the experiment of thermal error compensation was conducted, and it was proved that the technique is reliable and effective.