Patent ID: 7971467

Claim:
A stamping device comprising: a lower bending steel having a first supporting surface for supporting a work piece: an upper pad configured to move up and down with respect to the lower bending steel and, by moving downward, grip the work piece between the upper pad and the first supporting surface and fix the position of the work piece; an upper bending steel configured to move up and down with respect to the lower bending steel, make contact with the work piece while moving downward, and bend the work piece between the upper bending steel and the lower bending steel while further moving downward; a punch apposed to the lower bending steel, having a second supporting surface for supporting the work piece and configured to be incapable of moving up and down with respect to the lower bending steel; a lower pad disposed along a peripheral end of the second supporting surface, having a third supporting surface for supporting the work piece, and configured to move up and down with respect to the punch; and a drawing pad configured to move up and down with respect to the punch, grip the work piece between the drawing pad and the third supporting surface while moving downward and draw the work piece that is in a state of being gripped between the drawing pad and the third supporting surface by further moving downward and the work piece is drawn between the punch and the drawing pad by pushing the lower pad further downward, wherein: the timing at which the upper pad moves downward and grips the work piece between the upper pad and the first supporting surface is adjusted so as not to be later than the timing at which the upper bending steel makes contact with the work piece, and the height of a lower end of the upper bending steel after the timing at which the upper bending steel has made contact with the work piece and the height of a lower surface of the drawing pad after the timing at which the work piece has been gripped between the drawing pad and the third supporting surface are adjusted such that the lower end of the upper bending steel and the lower surface of the drawing pad move downward while maintaining the same height at a boundary between the upper bending steel and the drawing pad.