摘要
正态分布是汽车零件公差分布普遍遵循的分布规律,为了保证零件装配质量,只要99.97%的样本尺寸不超过公差上下限,则满足要求。受整车厂白车身制造工艺的限制,侧围下部会出现公差累积偏差变大及公差中心线偏移的问题。如何从制造公差角度来校核产品结构设计及工艺设计,如何在现有制造能力基础上进一步提高整车制造精度,需要不断的分析改进。
The application of normal distribution curve was the general rule on BIW vehicles and parts. Summarized the tolerance accumulation and deviation of tolerance center line in real building with BIW process analysis. Based on the existing manufacturing capacity to increase on accuracy of manufacture need analysis and improvement accordingly.
出处
《科技创新导报》
2019年第15期122-126,共5页
Science and Technology Innovation Herald
关键词
白车身
尺寸
公差累积
公差中心线偏移
BIW
Dimension
Tolerance accumulation
Deviation of tolerance center line
