Tolerance of shiftability parameters of an automobile gear box: a case study
by M.Z. Anis
International Journal of Process Management and Benchmarking (IJPMB), Vol. 16, No. 2, 2024

Abstract: This is a case study on determining the specification tolerances of the shiftability parameters of a gear box of a well-known brand of passenger car. The company was experiencing difficulty in setting up the specification tolerance, resulting in problems during the manufacturing process. The shiftability parameters Y_i's are related to the dimensions of n_i components X₁, X₂, ..., X_ni. The experimental design technique of Taguchi as modified by D'Errico and Zanio (1988) was used to find the probability distribution of all the shiftability parameters Y_i's. The tolerance limits (L_Yi, U_Yi) for the Y_i's were calculated after having selected 99% probability levels. These tolerance were applied to the shiftability parameters and a few prototypes were manufactured. The results obtained on these prototypes were encouraging and, hence, subsequently they were used by the design department in the gear box assembly.

Online publication date: Thu, 04-Jan-2024

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