基于恒力矩的自适应加工控制系统设计

Design of Adaptive Machining Control System Based on Constant Torque

切削力对加工质量和加工效率有着重要影响,针对切削力直接测量困难的问题,以高效稳定切削为目标,提出一种主轴恒力矩的自适应加工控制技术方案。以铣削加工为对象,在推导电磁力矩与切削参数关系的基础上应用Simulink建立了基于主轴电机矢量控制的自适应铣削加工模型,以恒电磁力矩为目标,采用模糊自适应控制策略对加工模型开展仿真实验,同时开发了自适应加工系统进行切削实验,两种实验结果均表明所提方法相较于传统的PID自适应加工方法具有更高加工效率、更好加工稳定性和更低的主轴负载波动。建立了虚实结合的自适应加工控制系统,有效降低了系统开发成本,虚实实验结果相互印证,提高了所提技术方案的可信度,该方案具有良好的工程参考价值。

Cutting force has a significant impact on machining quality and efficiency.In response to the difficulty of directly measuring cutting force,an adaptive machining control technology scheme with constant spindle torque is proposed with the goal of efficient and stable cutting.Based on the relationship between electromagnetic torque and cutting parameters,an adaptive milling machining model based on spindle motor vector control was established by Simulink.With constant electromagnetic torque as the target,fuzzy adaptive control strategy was adopted to carry out simulation experiments on the machining model,and an adaptive machining system was developed for cutting experiments.Both experimental results show that the proposed method has higher machining efficiency,better machining stability and lower spindle load fluctuation than the traditional PID adaptive machining method.A virtual-real adaptive machining control system is established,which effectively reduces the development cost of the system.The virtual-real experimental results confirm each other and improve the reliability of the proposed technical scheme.The scheme has good engineering reference value.