• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2023, Vol. 59 ›› Issue (9): 212-229.doi: 10.3901/JME.2023.09.212

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Progress and Prospect on Assembly Deviation Propagation of Mechanical Products

YU Haidong, GAO Chang, ZHAO Yong, YUAN Ke   

  1. Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, Shanghai Jiao Tong University, Shanghai 200240
  • Received:2022-05-13 Revised:2022-11-15 Online:2023-05-05 Published:2023-07-19

Abstract: Mechanical assembly is the final stage of the manufacturing process of the products. Assembly quality has a direct impact on the service performance and reliability of mechanical products. The establishment of the mathematical model, which may describe the transmission, accumulation and annihilation of deviation in the assembly process, is of great significance for tolerance design, fault diagnosis, and further improve the performance and service life of the products. The existing theoretical methods of assembly deviation analysis of mechanical products are summarized. Research progress of the assembly deviation analysis of the mechanical products is discussed through the deviation analysis based on rigid assumption and the analysis methods considering flexible deformation. The rigid deviation analysis is carried out around the dimension chain model and the deterministic locating method. The Jacobian-Torsor method based on dimension chain theory is introduced and analyzed in detail. The theoretical modeling process and application scope of the method of influence coefficient and assembly deviation field model are discussed in detail, which are the methods of flexible assembly deviation analysis. A specific case analysis of assembly deviation field model is carried out based on the engineering application of the assembly for large structure. Finally, the difficulties and research prospects of the analysis of the assembly deviation of the local rigid and integral flexible large-scale structure are discussed, which are aimed at the development trend of large size and high capacity of mechanical products in aerospace and other fields.

Key words: assembly deviation analysis, assemble dimension chain, method of influence coefficients, deviation field

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