Research on cause and treatment methods of virtual tolerances caused by process dimension calculation

Authors

FENG Wen-hui, 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
MA Xiao-san, College of Mechanical and Electronic Engineering, Huanghe Jiaotong University, Jiaozuo, Henan 454950, China; School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China

Abstract

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.

Publication Date

10-28-2021

First Page

93

Last Page

97

DOI

10.13652/j.issn.1003-5788.2021.10.017

Recommended Citation

Wen-hui, FENG and Xiao-san, MA (2021) "Research on cause and treatment methods of virtual tolerances caused by process dimension calculation," Food and Machinery: Vol. 37: Iss. 10, Article 17.
DOI: 10.13652/j.issn.1003-5788.2021.10.017
Available at: https://www.ifoodmm.cn/journal/vol37/iss10/17

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