基于温度敏感点选择的数控机床热误差补偿技术与应用研究

Analysis on NC machine tool thermal error compensation technology and applied based on the temperature sensitive selection

数控机床的许多误差元素相互耦合、相互影响,单一的误差补偿可能会造成过补偿问题。在机床几何误差和热误差补偿的同时还必须考虑切削力和刀具磨损等引起的误差,并且建立各误差之间的耦合关系。本文主要提出了温度测点在机床上的优化布置方法和在众多温度元素中选择关键温度元素的方法,通过选择温度敏感点,使得数控机床热误差数学模型的精确度更高,鲁棒性更好,而且热误差数学模型中的温度元素更少。

Many error of NC machine tool elements coupled to each other and influence each other, may lead to a single error compensation for compensation. At the same time in the machine tool geometric error and thermal error compensation must also consider the error due to cutting force and tool wear, and establish the coupling relationship between the errors. This paper puts forward the method of optimal placement of the temperature measuring point on the machine tool and choose the critical temperature elements in numerous temperature elements method, by selecting the temperature sensitive point, makes the accuracy of the numerical control machine tool thermal error mathematics model is higher, better robustness, and temperature elements of the mathematical model for thermal error less.