MATERIAL SELECTION OF BLANKING TOOL BY USING A STATISTICAL METHOD

Abstract

The material of blanking tool was identified as one of the negative factors affecting high non-conformance and downtime in the blanking process. The aim of this paper was to choose a suitable alternative to the original material of blanking tool for achieving a longer operating tool life, and thus enhance the effectiveness and efficiency of the blanking process. Recommended materials by supplier were Caldie, K340 and K890. In decision-making process, we used modified decision matrix FDMM (Forced Decision Matrix Method) as appropriate method for objective and independent selection of new a material for blanking tool. When applying the statistical method, we considered criteria such as abrasion resistance, chipping resistance, reasonable material price for blanking tool and blanking speed. After the inclusion of mentioned new material of blanking tool, we achieved a yearly reduction of blank non-conformance from 2.62% to 0.05%. We succeeded in reducing the production time of 1 blank from 1.1 s to 0.9 s.

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