三轴立式加工中心几何误差补偿方法的研究

摘要

为了提高机床加工精度,采用误差补偿法对三轴立式加工中心几何误差补偿问题进行了研究.基于分层递阶补偿思路,分析了机床自身结构的特点并利用西门子840D商用数控系统提供的几何误差补偿模块,将机床系统的几何误差分为可补偿误差和不可补偿误差两部分,依据可补偿误差建立误差补偿模型,实现了补偿.在三轴立式加工中心0540D上进行过了实际加工验证,结果表明,数控机床的运动精度得到了提高.%To improve the machining accuracy of machine tool, the geometric error compensation for three-axis vertical machining center was studied through error compensation. Based on the idea of hierarchical compensation, analyzing the feature of the structure of machine tool and using geometric error compensation module in a commercial CNC system (SIEMENS 840D) , the geometric errors of the machine center were divided into compensable errors and uncompensable errors and an error model for compensation was established according to the compensable errors. An experiment was carried out in 0540D three-axis vertical machining center. The results show that the kinematic accuracy after compensation is improved.