虚拟加工过程中快速模拟与分析技术研究

虚拟加工的主要任务是预测和改进被加工件的加工精度。提出了一种新的技术方法以实现虚拟加工的工件受力变形快速模拟。这种方法基于可扩充的典型薄壁元素与变形解析算法库，并辅以预置区域和最小壁厚等方法，把加工中工件可能产生较大受力变形而影响尺寸精度的加工位置作为分析的重点，将变形量简化估算与少量的有限元精确分析相结合，可以提高虚拟加工模拟速度，推进虚拟加工技术的实用化。

Study on Rapid Simulation and Analysis Techniques in Virtual Machining Process

The main objective of virtual machining process is to predict and improve machining accuracy. For this purpose, a numerical model (such as finite-element model) is usually needed to analyze the deformation of workpiece caused by cutting forces for each step in cutting simulation. A new method was proposed to realize rapid simulation and analysis of the workpiece deformation in virtual machining processes. The new method is based on an extendable library of typical thin-wall components with their deformation analytical algorithms and methods of presetting dangerous areas and the minimum thickness principal, which puts greater emphasis on the dangerous cutting positions and areas and combines the simplified estimation algorithm with the accurate numerical computations.Thus the simulating speed in virtual machining is greatly increased and a step forwards in practicality of virtual machining technique is made.