并联机床虚拟样机建模与加工过程动力学仿真

Dynamic Simulation Modeling and Machining Simulation of Parallel Machine Tool

为了实现并联机床性能的真实预测,确保加工过程的安全性,提出了基于Adams的并联机床加工过程的动力学仿真方法。在包括螺旋副在内的仿真模型的各个运动关节加载了摩擦力,实现了仿真模型与实际机床的高度仿真;根据NC文件和切削参数,建立并联机床加工过程的切削力模型和运动控制模型,实现了机床加工零件全过程的动力学仿真。对5-UPS/PRPU并联机床的加工过程进行了仿真分析,仿真结果准确的预测了实际加工中可能出现的问题。该方法简单、准确、可靠、实用性强。

A new method for dynamic simulation of the process of cutting was proposed in order to forecast the performance of the parallel machine tool and ensure safety of the cutting process. Adding friction to all joints including screw joints realized the simulation model perfectly according with the real machine tool Then, motion controlling model and cutting force model were created according to numerical control files and cutting parameters. Importing the instance simulation on the machining process of 5-UPS/PRPU parallel machine tool, the simulation results predict accurately the probable problems in the practical machining process. This methodology is easy, accurate, reliable and practical.