控制精度不匹配造成表面缺陷解决方法  

Solution to the Problem of Precision Mismatch in Manufacturing Process

作　　者：于光辉 郭东栋[1,2] 张丁博 YU Guanghui;GUO Dongdong;ZHANG Dingbo(Beijing Benz Automobile Company Limited,Beijing 100176,China;Peking University,Beijing 100871,China)

机构地区：[1]北京奔驰汽车有限公司,北京100176 [2]北京大学,北京100871

出　　处：《汽车实用技术》2022年第24期129-133,共5页Automobile Applied Technology

摘　　要：在白车身生产制造环节中,由于零件与工装夹具相对位置不稳定,很容易造成磕碰问题,从而带来白车身的表面质量缺陷,部分严重缺陷也可引发其他风险问题。文章阐述了某车型在生产制造中,因上下制造环节控制精度不匹配造成零件表面磕伤缺陷和线束孔密封性问题,在不进行新的投资改造条件下,通过优化调整的方式来解决这类问题。在分析调查的过程中使用流程图分析法识别问题发生点;在解决问题的过程中,一方面提高控制精度低环节的精度,另一方面增加控制精度高环节的容错度,通过这两方面的组合式调整,解决因控制精度不匹配造成的磕碰问题,避免表面质量缺陷的产生,从而降低了返修成本且消除了影响线束孔密封性的风险点。In the manufacturing process of body in white(BIW), the surface quality of BIW is easy to be caused due to the unstable position of parts and fixtures and some serious defects can also cause other risk problems. This paper expounds the solution to the problem of parts deformation caused by the mismatch of upper and lower manufacturing accuracy in the manufacturing process of a vehicle model, without new investment. In the process of analysis and investigation, the flow chart analysis method is used to identify the point of occurrence of the problem;In the process of solving the problem, on the one hand, improve the precision of low precision links, on the other hand, increase the fault tolerance of high precision links. Through the combined adjustment of these two aspects,and the surface quality defect is avoided, thereby reducing the higher rework cost and eliminating the risk point affecting the sealing of the wiring harness hole.

关 键 词：表面质量优化 流程图分析法 控制精度 容错度 

分 类 号：U466[机械工程—车辆工程]