研究了在汽车制造中关于车身装配尺寸的问题对于焊装工装夹具调试的挑战.对局部坐标系下白车身尺寸问题需要调试基准点的情况,调试过程比较复杂,基准拟合变化后的旋转位移等叠加会影响问题区域尺寸的变化,这些影响无法提前预估.传统的调试过程需要多轮调试,时间长且难以准确定位和解决问题.研究方法包括使用测量数据和软件分析来模拟和优化调试过程.在实施过程中,收集了实际问题区域的点云数据,使用测量软件Caligo进行数据拟合,建立局部坐标系以快速评价可能的尺寸变化来确定需要调整的目标.这一方法显著提高了调试的效率和精度,减少了成本和浪费.创新点在于通过模拟分析,精确定位尺寸问题的源头,避免了不必要的调整,节省了时间和成本.还强调了继续研究和开发数字化自动程序的重要性,以进一步提高调试的效率和精确度.

现代工业中测量技术不断升级,在车身尺寸监控中,除了传统的三坐标接触式测量外,光学测量技术也得到越来越多的应用和发展.光学测量之所以在尺寸监控方面越来越受到欢迎和重视,与其自身所带的优势密不可分.

Stress distribution of a type of automobile bolt under torsional load was analyzed by finite element method,aiming to solve the problem of bolt break during automobile assembly.The results suggest that the stress is close to the breaking strength.Therefore,the authors conclude that the breaking strength is taken as the strength limit in designing the automobile bolts.The authors also consider that the finite element analysis module attached to 3-D design software is an easy and fast approach of mechanical design for the large number of non-critical parts like automobile bolts,which can meet the common requirements for strength analysis.