五轴数控机床综合热误差建模与空间解耦补偿

Synthesis Thermal Error Modeling and Space Deoupling Compensation for a Five-axis CNC Machine Tool

基于多体系统理论,提出了一种机床热误差综合模型的通用建模方法,以一台双刀摆型国产五坐标数控机床为例,建立了包含50项热误差元素的热误差综合数学模型。基于小误差补偿运动假设,在分析误差运动和补偿运动间关系基础上对热误差综合模型进行空间解耦,建立了可以进行多轴机床热误差补偿量计算的数学模型,为五轴机床热误差实时补偿提供了理论基础。

Based on the principles of multi-body system, a synthesis thermal error model involves 50 error components is set up by taking a domestic five-axis numerical control machine tool as an example. The relationship between error and compensation amount is obtained by decoupling the synthesis thermal error model using differential movement,provides a theoretical basis for error compensation of five-axis machine tool.