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Article

An Assembly Accuracy Analysis Method for Weak Rigid Components

1
School of Aircraft Engineering, XiHang University, Xi’an 710077, China
2
Key Laboratory of Road Construction Technology and Equipment of MOE, School of Construction Machinery, Chang’an University, Xi’an 710064, China
*
Author to whom correspondence should be addressed.
Machines 2025, 13(8), 694; https://doi.org/10.3390/machines13080694
Submission received: 25 June 2025 / Revised: 4 August 2025 / Accepted: 5 August 2025 / Published: 6 August 2025

Abstract

Most existing assembly accuracy analysis methods focus on rigid assemblies or assume assemblies to be rigid bodies, neglecting the influence of assembly deformation in weak rigid components (WRCs) such as thin-walled structures, cantilever structures, etc. As a result, the assembly accuracy analysis becomes inaccurate, and the accuracy of key components cannot be effectively controlled. This may lead to serious issues such as forced assembly, repair, and rework. To address these problems, this study proposes a rigid–flexible coupling-based assembly accuracy analysis method for WRCs. The stiffness matrix and assembly deformation of WRCs are calculated, and by coupling assembly deformation with other assembly deviations, a rigid–flexible coupling assembly accuracy data model is established. This model incorporates multiple deviation sources, including assembly process variations, design tolerances, and assembly deformations. Assembly deviation transfer modeling and accumulation calculation methods for WRCs are investigated, enabling assembly accuracy simulation and statistical analysis. A case study on WRC assembly accuracy analysis is conducted, and the results demonstrate that the proposed method improves the accuracy of assembly analysis for WRCs, verifying its reliability.
Keywords: assembly accuracy analysis; rigid–flexible coupling; assembly deviation transmission; weak rigid components (WRCs) assembly accuracy analysis; rigid–flexible coupling; assembly deviation transmission; weak rigid components (WRCs)

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MDPI and ACS Style

Zhao, D.; Yuan, Z.; Zhao, X.; Wang, G. An Assembly Accuracy Analysis Method for Weak Rigid Components. Machines 2025, 13, 694. https://doi.org/10.3390/machines13080694

AMA Style

Zhao D, Yuan Z, Zhao X, Wang G. An Assembly Accuracy Analysis Method for Weak Rigid Components. Machines. 2025; 13(8):694. https://doi.org/10.3390/machines13080694

Chicago/Turabian Style

Zhao, Dongping, Zhe Yuan, Xiaosong Zhao, and Gangfeng Wang. 2025. "An Assembly Accuracy Analysis Method for Weak Rigid Components" Machines 13, no. 8: 694. https://doi.org/10.3390/machines13080694

APA Style

Zhao, D., Yuan, Z., Zhao, X., & Wang, G. (2025). An Assembly Accuracy Analysis Method for Weak Rigid Components. Machines, 13(8), 694. https://doi.org/10.3390/machines13080694

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