PURPOSE: A motor press working machine is provided to reduce the time for the first process of press forming by transferring an upper die at a high speed and to increase torque during a process. CONSTITUTION: A motor press working machine comprises a slider(5) having a frame(4) and an upper die(6) and sliding along a pillar(3), a connecting unit for upwardly and downwardly moving the slider via a ball screw shaft(19) driven by an AC servo motor(9), and a lower die(22). Based on the position signals detected by a continuously variable transmission(10) installed between the AC servo motor and the ball screw shaft and a pulse scale(23) detecting the position of the upper die, the upper die pressurizes a workpiece(24) placed on the lower die. During a press forming process, the AC servo motor is in a torque increase mode. Otherwise, the upper die is rapidly lifted up and down by a controller(25).

Motor press working machine having controller for rapidly lifting up and down upper die by detecting contacting position of upper die and workpiece and using continuously variable transmission
Application Number
Publication Number
Application Date
February 25, 2004
Publication Date
September 20, 2004
Unno Keizo
Futamura Shoji
Institute Of Technology Precision Electrical Discharge Works
B30B 01/18