Criterion for tool wear limitation on blanking 18-8 stainless steel strips
Keywords:Tool wear, Tool life, Blanking, Stainless steel
The present article shows a wear limiting criterion for 18-8 stainless steel punching process. For this reason, different factors such as length of the tool, clearance or materials, have been considered in order to obtain the number of possible strokes between grindings and the total number of blanks until a complete total failure. Finally, the maximum number of possible strokes which it will give the economically accepted wear can be obtained. The results obtained by the present method are in good agreement with the previous experimental and theoretical work. Blanking tests were performed using a 20 t press at a speed of 150 strokes/min. The punching material used in these tests was AISI A2 with diameters between 6 and 14 mm. The blanking tests were performed at a clearance between 5 and 20 % of the thickness of the work material.
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