中文摘要：

针对VTL型数控蒙皮拉形机建立三维数字化模型,并对其进行机构运动分析。根据蒙皮拉形变形特点,提出一种拉形加载轨迹设计方法。基于应变控制设计出执行钳口运动轨迹,并根据拉形机机构运动规律,将执行钳口运动轨迹转化成拉形机驱动机构运动参数。采用CAA技术在CATIA平台上开发了相应的加载轨迹设计软件;以柱形蒙皮为例,利用开发的软件设计加载轨迹,通过有限元模拟和试验,验证了轨迹设计的合理性。

英文摘要：

Based on VTL numerical control stretch forming machine introduced from abroad,3D digital model was built and mechanism motions were analyzed.For stretch forming process of aircraft skin,a loading trajectory design method was given.Firstly,jaw trajectory was designed using deformation control,which was then translated to driven parameters according to the rules of the stretching machine.And loading trajectory design software was developed on the platform of CATIA using CAA technology.Finally,detailed design processes of loading trajectory for stretch forming of cylindrical skin were provided as an example.The feasibility of the loading trajectory design methods was verified by the FE simulation and experiments carried out.