In Base urgent, or bottoming, the punch presses the workpiece from the bottom floor of the V or U-shaped die, which defines the ultimate bend angle. This technique creates exact bends and cuts down the tendency for springback while in the workpiece because of the appliance of increased bending drive. https://martin0uw12.wikienlightenment.com/7364625/details_fiction_and_stamping_golf_irons