The reason behind the appliontion of clearance in the manner us given above, is explained below
The diameter of the blank or punched hole is determined by the burnished area. On the blank, the burnished area is produced by the walls of the die Therefore, the blank size will be equal to the size of die-opening (neglection a slight expansion of the blank due to elastic recovery after the cutting operation is completed). Slimilarly, in punching operation, the burnished area in the hole is produced by the punch, therefore, the size of the will be the produced by the punch, therefore, the size of the hole will be the
The reason behind the appliontion of clearance in the manner us given above, is explained below The diameter of the blank or punched hole is determined by the burnished area. On the blank, the burnished area is produced by the walls of the die Therefore, the blank size will be equal to the size of die-opening (neglection a slight expansion of the blank due to elastic recovery after the cutting operation is completed). Slimilarly, in punching operation, the burnished area in the hole is produced by the punch, therefore, the size of the will be the produced by the punch, therefore, the size of the hole will be the
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