Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Development of an Efficient Method to Consider Weld Distortion in Tolerance Analysis

용접변형을 고려한 효율적 공차해석 기법 개발

  • Published : 2005.10.01
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Abstract

A general and efficient methodology has been developed to analyze dimensional variations of an assembly, taking into account of weld distortion. Weld distortion is generally probabilistic because of the random nature of welding parameters such as the welding speed, maximum welding temperature, ambient temperature, etc. The methodology is illustrated through a very simple example of two perpendicular plates fillet-welded to each other. Two steps comprise the methodology: establishment of a weld-distortion database, and tolerance analysis using the database. To establish the database, thermo-elasto-plastic finite element analyses are conducted to compute the weld distortion for all combinations of discrete values of major welding parameters. In the second step of tolerance analysis, the weld distortion retrieved from the database is used in addition to the dimensional tolerances of the parts. As a result of such an analysis, sensitivities of the assembly's dimensional variations to the part tolerances and weld distortion are obtained, which can be help improve the dimensional quality of the assembly.

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References

  1. Chase, K.W. and Parkinson, 1991, 'A Survey of Research in the Application of Tolerance Analysis to the Design of Mechanical Assemblies,' Research in Engineering Design, No. 3, pp. 23-27 https://doi.org/10.1007/BF01580066
  2. Juster, N.P., 1992, 'Modelling and Representation of Dimensions and Tolerances: A Survey,' Computer Aided Design, Vol. 24, No. 1, pp. 3-17 https://doi.org/10.1016/0010-4485(92)90086-P
  3. Hu, S. J. and Wu, S. M., 1992, 'Identifying Sources of Variation in Automobile Body Assembly Using Principal Component Analysis,' Trans. of NAMRI, Vol. 20, pp. 311-316
  4. Hsieh, C.C. and Oh, K.P., 1997, 'A Framework for Modelling Variation in Vehicle Assembly Processes,' Int. J. of Vehicle Design, Vol. 18, No. 5, pp. 466-473
  5. Liu, S.C. and Hu, S.J., 1997, 'Variation Simulation for Deformable Sheet Metal Assemblies Using Finite Element Methods,' Journal of Manufacturing Science and Engineering, Vol.119, pp. 368-374 https://doi.org/10.1115/1.2831115
  6. Dimensional Control System, 2003, 3DCS Analyst User's Manual