关键词: 并联机构, 尺寸驱动, 数控代码, 虚实映射

Abstract: In order to obtain the solution for mapping NC code of a parallel machine tool from virtual axis space to real axis space without the construction of mathematical model, a method of using assembly constraint and dimension driven function of CAD software was presented. Defining the pose parameters of the tool as the driving dimensions and the length of actuating limbs as the driven dimensions, the configuration of the simulation mechanism was varied correspondingly with the variation of the driving dimensions and the driven dimensions (length of actuating limbs) could be acquired and recorded. The results of computer simulation show that this method is not only straightforward and quick, but is also advantageous from viewpoint of accuracy and the highly efficient solution for other parallel mechanism.

Key words: parallel mechanism, dimension driven, NC code, mapping from virtual axis space to real axis space