Equivalent to the combination of rotating shaft and stator pressure ring.
Whether stator punching sheet or rotor punching sheet, punching sheet should be inserted into the mandrel and fixed up and down with pressure plates. The pressure plate can pass through the bolt to maintain the pressing force. The lower platen should have a chassis with a diameter greater than 1.5 times the diameter of the stamping plate. The upper platen has bolt holes (six to eight, four symmetrically arranged if the punching sheet is small), and the bolt length is greater than the iron core length (greater than the height before pressing and more than the nut).