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Compensation Method of the Machine Tool Spindle Thermal Displacement for Accurate Monitoring of Cutting Forces

机译:精确控制切削力的机床主轴热位移补偿方法

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摘要

In this research work, the authors use displacement sensors in the spindle structure to monitor cutting forces for intelligent machining. However, the monitoring quality in the long term is a problem because sensor signals involve offset drift, which is mainly attributable to the thermal displacement of the spindle. To solve this problem, we attached thermal sensors in the machine and cooling system. The estimation of the spindle thermal displacement based on temperature data from these thermal sensors can provide more information for monitoring of cutting forces. For accurate monitoring of cutting forces, thermal displacement compensation scheme is proposed, and the monitoring tests of cutting forces in end milling operations are carried out as cases study. With thermal displacement compensation scheme implemented, the experimental result shows that the monitoring of small and medium scale cutting forces is possible, if cutting process is intermittent.
机译:在这项研究工作中,作者在主轴结构中使用位移传感器来监控切削力,以进行智能加工。但是,从长远来看,由于传感器信号会引起偏移漂移,这是一个问题,这主要归因于主轴的热位移。为了解决这个问题,我们在机器和冷却系统中安装了热传感器。根据来自这些热传感器的温度数据估算主轴热位移,可以为监控切削力提供更多信息。为了精确地监测切削力,提出了热位移补偿方案,并进行了立铣刀中切削力的监测试验作为案例研究。通过实施热位移补偿方案,实验结果表明,如果切割过程是间歇性的,则可以监控中小型切割力。

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