一种四轴精密机床工作台装配精度分析与预估
Assembly Accuracy Analysis and Prediction of a Four Axis Precision Machine Table

针对精密机床在装配过程中的精度保障问题,提出了一种建立装配过程偏差传递预测数学模型的方法。以一种精密级四轴卧式加工中心为对象,对影响机床装配精度的关键部位进行了偏差特征分析。基于小位移旋量理论建立典型偏差特征的数学模型。基于串联装配关系,建立了机床进给平台装配偏差传递数学模型,并以此模型预估末端装配精度。最后通过实验验证该建模方法的有效性。
To deals with the problem of ensuring accuracy of the assembly processing, a forecasting model of assembly deviation propagation is proposed. The deviation characteristics that affect the assembly accuracy of a four axis horizontal precision machining center are analyzed. Based on the small displacement spin theory, the mathematical model of typical deviation characteristics is established. Based on the series assembly relation, the mathematical model of assembly deviation transfer is established to predict assembly accuracy of the end. The effectiveness of the proposed approach was verified by measurement experiments