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主轴热误差是工件加工误差的主要来源之一,针对传统补偿策略算法复杂、成本较高且通用性不强等问题,提出了一种基于自组织原理的主轴热误差补偿策略,它只需根据对主轴热倾斜状态的定性测量结果即可进行定量误差补偿,从而可以大大降低对误差测量精度的要求及测量成本,同时各补偿力间的协调关系根据自组织原则自动建立,简化了补偿算法。经过对某型加工中心主轴热误差进行的自组织仿真补偿,其主轴热倾斜误差减小了92%以上,热偏移误差减小了46%以上。
The thermal error of the spindle is one of the main sources of workpiece machining error. Aimed at the problems of complex, high cost and poor universality of the traditional compensation strategy, a thermal compensation strategy of spindle based on self-organizing principle is proposed. The qualitative measurement results of the thermal tilt of the spindle can be quantitative error compensation, which can greatly reduce the error measurement accuracy requirements and measurement costs, while the coordination between the compensation force is automatically established based on the principle of self-organizing, simplifying the compensation algorithm. After self-organization simulation compensation of the thermal error of a spindle of a type of machining center, the thermal tilt error of the main spindle is reduced by more than 92%, and the thermal offset error is reduced by 46% or more.