针对轨道机车空气管路设计标准以及设计过程中存在的一些问题,使用UG/Open API技术开发出机车空气管路CAD系统,对CAD设计过程中UG无法识别的管路数据特征进行识别和获取,并通过理论算法计算出精确的控制点。该系统缩短了空气管路的设计周期,提高了设计效率,为生成实际的机车空气管路提供快捷简便的途径。 Aiming at the design criteria of air ducts for track locomotives and some problems existing in the design process, the locomotive air pipeline CAD system was developed using UG / Open API technology to identify and acquire the unrecognized pipeline data characteristics in the process of CAD design. And through the theoretical algorithm to calculate the precise control point. The system shortens the design cycle of the air line and improves the design efficiency, which provides a quick and easy way to generate the actual air line of the locomotive.