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OPTIMIZATION OF WELD CRACK EXPANSION DEFECT OF WHEEL RIMS BY USING TAGUCHI APPROACH: A CASE STUDY

Dr. D. R. Prajapati , Daman Vir Singh Cheema

For off-line quality control, Taguchi realized that the best opportunity to eliminate variation is during the design of a product and its manufacturing process. Consequently, he developed a strategy for quality engineering that can be used in both contexts. Analysis of variance (ANOVA) is uses to analyze the significant factors of weld crack expansion defect of wheel defects of wheel rim manufacturing. This industry is located in northern part of India and producing the wheel rims. The main components manufactured by this firm are the wheel rims of automobiles. The range of diameter of wheel rims ranges from 10 inches to 30 inches and width may vary from 2.25”– 13” (inches). Through the Taguchi parametric design approach, the optimum levels of process parameters are determined. The percentage of contribution of each process parameter is determined by Analysis of variance. Taguchi’s experimental design yielded optimized control factors, resulting in superior product quality and stability. It is concluded that for weld crack expansion defect, the most significant factor is impact force (factor C) out of three factors.