基于CATIA二次开发中点误差控制算法实现及其应用

Implementation and Application of Middle-Point Error Control Method Based on CATIA Secondary Development

目前,航空企业中普遍存在大型模具曲面加工效率低和加工质量差的问题。为解决上述问题,本文提出了一种以高效的五轴数控加工算法——中点法为基础的解决方案。首先,分析中点误差控制算法的基本原理。然后,基于CATIA二次开发平台,通过利用C++语言编程来实现中点误差控制算法,并集成到CATIA V5的曲面加工模块。最后,以典型的航空蒙皮模具曲面为例进行了加工试验。结果表明,该算法不仅能够大幅提高蒙皮模具曲面的加工效率,而且改进了模具曲面的加工质量,并缩短后续手工抛磨的工作量。可见,该方法具有较强的工程应用价值,且能在航空企业内部进行推广应用。

Currently, there exist the problems of low efficiency and poor quality of large mold surface machining in aviation enterprises. To solve these problems, a solution based on the mid-point en-or controlling method （MPEC） that is a high efficient algorithm of five-axis tool positioning is proposed in the paper. First, the basic prin- ciple of MPEC is investigated and analyzed. Then, based on CATIA secondary development platlbrm, the MPEC method can be implemented by using the C＋＋ program- ming language, and be integrated into surface machining module of CATIA V5. Finally, a machining experiment of the typical aircraft skinned mold surface is conducted. Obtained results show that the algorithm can not only dramatically improve machining efficiency of skinned mold surface, but also improve the machining quality of the mold surface and shorten the polishing time by hand. Therefore, the proposed method has a strong engineering application value, and can be extensively applied within the aircraft enterprises.