Monomer model: an integrated characterization method of geometrical deviations for assembly accuracy analysis. Issue 4 (26th June 2021)

• Record Type: Journal Article
• Authors: Zhao, Binbin; Wang, Yunlong; Sun, Qingchao; Zhang, Yuanliang; Liang, Xiao; Liu, Xuewei
• Is Part Of: Assembly automation. Volume 41:Issue 4(2021)
• Page Start: 514
• Page End: 523
• Publication Date: 2021-06-26
• Subjects: Accuracy analysis -- Assembly deformation -- Geometrical deviations -- Monomer model; Automation -- Periodicals; Automatic machinery -- Periodicals; Assembly-line methods -- Periodicals; Industrial engineering -- Periodicals; 670.42705
• DOI: 10.1108/AA-11-2020-0165
• Languages: English
• ISSNs: 0144-5154

Abstract

Abstract : Purpose: Assembly accuracy is the guarantee of mechanical product performance, and the characterization of the part with geometrical deviations is the basis of assembly accuracy analysis. Design/methodology/approach: The existed small displacement torsors (SDT) model cannot fully describe the part with multiple mating surfaces, which increases the difficulty of accuracy analysis. This paper proposed an integrated characterization method for accuracy analysis. By analyzing the internal coupling relationship of the different geometrical deviations in a single part, the Monomer Model was established. Findings: The effectiveness of the Monomer Model is verified through an analysis of a simulated rotor assembly analysis, and the corresponding accuracy analysis method based on the model reasonably predicts the assembly deviation of the rotor. Originality/value: The Monomer Model realizes the reverse calculation of assembly deformation for the first time, which can be used to identify the weak links that affect the assembly accuracy, thus support the accuracy improvement in the re-assembly stage.