摘要
目的:避免工序尺寸换算过程中虚公差现象的产生,提高机械零件加工工艺规程的可执行性。方法:以工艺尺寸链计算中封闭环与各组成环之间的公差分配关系和误差补偿关系为基础,对零件工艺基准和设计基准不重合条件下工序尺寸虚公差产生的原因和工艺尺寸链的改进方法进行了研究。结果:从封闭环的选择、已知组成环尺寸公差的合理压缩以及根据其他组成环尺寸的实际偏差确定工序尺寸公差3方面,提出了工艺尺寸链处理和改进方法。结论:从以上3方面对工艺尺寸链进行处理和改进,可有效避免工序尺寸虚公差现象的发生。
Objective:To avoid the virtual tolerance phenomenon in the process dimension conversion,and improve the operability of machining process specification by processing and improving of machining process dimension chain.Methods:Based on the tolerance distribution relationship and error compensation relationship between the concluding link and each component link in the calculation of process dimension chain,studie the causes of virtual tolerance of process dimension and the improvement method of process dimension chain under the condition that the part process datum and design datum did not coincide.Results:The processing and improvement methods of process dimension chain were put forward from three aspects:the selection of concluding link,the reasonable compression of known component link dimension tolerances and the determination of process dimension tolerance according to the actual deviation of other component ring dimensions.Conclusion:By processing and improving the process dimension chain from the above three aspects,the phenomenon of virtual tolerance of process dimension can be effectively avoided.
作者
冯文慧
马晓三
FENG Wen-hui;MA Xiao-san(College of Mechanical and Electronic Engineering,Huanghe Jiaotong University,Jiaozuo,Henan 454950,China;Engineering Technology Research Center of Key Parts Manufacturing Process and Equipment in Material Conveying Apparatus of Jiaozuo City,Jiaozuo,Henan 454950,China;School of Mechanical and Power Engineering,Henan Polytechnic University,Jiaozuo,Henan 454000,China)
出处
《食品与机械》
北大核心
2021年第10期93-97,共5页
Food and Machinery
基金
河南省智能制造技术与装备工程技术研究中心资助项目(编号:3118210370)。
关键词
虚公差
工序尺寸
工艺尺寸链
公差压缩
实际偏差
virtual tolerance
process dimension
process dimension chain
condensation of tolerance
actual deviation
