Tolerance Analysis of the Trigger Mechanism Assembly Using Direct Linearization Method

Document Type: Persian


1 M.Sc., Mechanical Engineering Department, Sharif University of Technology.

2 Professor, Mechanical Engineering Department, Sharif University of Technology


Tolerance analysis of mechanical assemblies is an important tool in reliable design of products at low cost and good quality. Using this tool, it is possible in manufacturing stage to observe the effect of parameters on assembly requirements. The direct linearization method is a useful method which runs based on vector loop analysis. In this research, the DLM method is used to analyze the tolerance chain in triggering mechanism assembly. Furthermore the percent contribution of various manufacturing dimensions on the design requirement of the assembly in determined.  


equicha A.A.G., Toward a theory of geometric tolerancing, Int. J. Robot. Res., 2(4): 1983,
pp. 45–59.

[2] Chase K.W., Gao J., Magleby S.P., General 2-D tolerance analysis of mechanical assemblies with small kinematic adjustments,. J. Des. Manuf. 5(4):1995, pp. 263-274.

[3] Standard ASME Dimensioning and Tolerancing: ASME Y14.5M-2009. ASME, New York .

[4] Pasupathy T.M.K., Morse E.P., Wilhelm R.G., A survey of mathematical methods for the construction of geometric tolerance zones, Trans. ASME. J. Comput. Inf. Sci. Eng., 3(2), 2003, pp.64–75.

[5] Davidson J.K., Mujezinović A., Shah J.J., A New Mathematical Model for Geometric Tolerances as Applied to Round Faces, ASME J. Mech. Des. 124 ,2002, pp. (609–621).

[6] Evans DH. Statistical tolerancing: the state of the art, Part I: Background, Journal of Quality Technology, 1974, pp.188-195.

[7] Araj S, Ermer DS., Integrated simultaneous engineering tolerancing, In: Abdelmonem AH, editor. Quality improvement techniques for manufacturing products and services, Dearborn, MI, USA: American Society of Mechanical Engineers, 1985, pp. 97-114.

[8] Movahedy M.R., Khodaygan S., Tolerance Analysis of Mechanical Assemblies with Asymmetric Tolerances., Trans. SAE J. Materials Manuf.116: 2007, pp. 44-52.

[9] Bjùrke éyvind., Computer-aided tolerancing, 2nd ed., New York, NY, USA: ASME Press, 1989.

[10] Chase K., Gai J., Magleby S.P., Sorensen C.D., Including geometric feature variations in tolerance analysis of mechanical assemblies, IIE Transactions, 1996, 28,  pp. 795-807.

 [11] Cvetko, Robert, Characterization of Assembly Variation Analysis Methods, M.S. thesis, Brigham Young University 1997.