工艺系统受力变形对加工误差影响仿真分析

Simulation Analysis of Influence of Force in Process System on Machining Accuracy

研究了工艺系统受力变形对加工误差的影响,论述了影响工艺系统受力变形的因素和规律,分析了常见加工方法工艺系统受力变形状态,建立了与其对应的数学模型。通过对工艺系统各有关部件变形进行分解,更好地显示了加工过程中机床、刀具和工件的实时位置,为工艺过程控制提供了分析平台。仿真分析表明,加工方法、进给运动方式、工件和刀杆装夹方式、工件和刀杆形状尺寸、切削力大小和位置以及各薄弱环节部件的刚度均对工艺系统受力变形有很大影响,从而使被加工工件产生加工误差。

This paper studies the influence of force in process system on machining accuracy, discusses its factors and rules and an-alyzes. its states in the common processing, and then, establishes the mechanical model. Through the study of the deformation of the relevant parts, it shows the real time location of processing machine tool, cutting tool and part in the process and a good platform is provided for the analysis of process control. Simulation analysis shows that the machining method, the feed movement way, the part and tool rod clamping way, the size of the part and tool rod shape, size and position of cutting force and the part stiffness have great influence on the machining accuracy.