A Counter-die applies reciprocating strain at The underside of the workpiece to maintain flatness. This restricted clamping and well balanced tension avoid plastic deformation, resulting in smoother, entirely sheared edges. Following punching, the Device opens, and an ejector pin pushes the finished portion out. Around the history of metal stamping, https://waylon8eh02.laowaiblog.com/30920439/the-greatest-guide-to-stamping-cast-iron