Offset dies—a mixture punch and die established that bends two angles in a single stroke to supply a Z condition. Tube- and pipe-forming dies—a first operation bends the sides with the sheet to produce the piece roll up. Then a die similar to a curling die leads to the tube https://pressbrakeshenchong25680.madmouseblog.com/8274051/helping-the-others-realize-the-advantages-of-plate-cutting-machine-shenchong