基于多级基准坐标系的车身偏差诊断方法研究

Research on Diagnosis Method of Car Body Deviation Based on Multi-level Reference Coordinate System

针对车身多工位装配中的尺寸偏差诊断问题,在整车装配树的多层级结构基础上,构建不同层级子基准坐标系,提出多级基准坐标系下的零部件尺寸判异方法,以及故障工位识别方法,通过对整车尺寸偏差数据挖掘实现多工位装配中的故障源诊断。文中借鉴针对在线测量的大样本数据下的2 mm工程稳定性分析模式,尝试建立针对整车三坐标检测高精度数据下的偏差诊断分析模式,以补足和完善尺寸控制的分析流程方法。

Aiming at the problem of dimensional deviation diagnosis in multi-station assembly of vehicle bodies, a multilevel sub-reference frame is constructed based on the multi-level structure of the vehicle assembly tree. A method for discriminating component sizes in a multi-level reference coordinate system and a method for identifying faulty stations are proposed. The fault source diagnosis in multi-station assembly is realized by mining the vehicle size deviation data.Referring to the 2 mm engineering stability analysis mode under the large sample data measured online, this paper establishes a deviation diagnosis analysis mode for the high-precision data of the vehicle’s three-coordinate detection to complement and improve the analysis process method of size control. It provides a reference for the research on the autodeveloping algorithm for the fault source diagnosis of deviations in the automotive industry.