数控加工的图形仿真与验证技术研究

On Improving Simulation and Verification of Numerical Control Machining

介绍了一种基于物体空间的离散方法，将毛坯和刀具模型离散，切削表面以三角网格表示，使得切削计算量大大减少，并且利于图形显示和观察分析。通过改变离散的精度和求交的方法，可以把这种离散结构统一地应用到仿真和验证中去，比起图系空间离散法，在执行效率上减少不多，但具有更方便的观察分析手段。

We propose a technical strategy for improving simulation and verification of NC (numerical control) machining. Our improvement allows the user to control NC machining according to the requirements of time and precision.We discrete workpiece and tool swept volume into a set of pillars in object space. The process of milling is simulated by the decrease of pillar' s height. As milling progresses, we display the workpiece and tool with a single shading graph. This method allows user to control discrete intensive according to the requirements of time and precision. When we increase the discrete intensive and revise the intersection algorithm between tool and workpiece, our method can also verify more precisely the milling error.The author implemented the above method on a workstation. An example of 3D milling for a mould is shown in Figs. 3 and 4.