Screw deburring die making machine - has ram to press blank bore into polygon section while outside dia. is kept constant to calibrate screw heads

摘要

The dies is made with a conical polygonal bore and is used in a screw deburring machine. The die carrier has a cup shaped seat for the calibration of spanner flat dimensions of the screws. The blank of the deburring die is made in another die whose outside dia. matches the inside dia. of the cup shaped seat. It is made to finished depth and with a cylindrical inside bore. The polygonal hole is made by cold forming of the inside dia. by a polygonal punch while the outside dia. is kept constant.