JP2012507404A5 - - Google Patents

Claims (7)

Frame;
Wherein a rotatably mounted one drive screw to the frame, a first of said drive screw freely selectively rotated in opposite directions by a motor means mounted fixed to the frame;
A ram reciprocating within an operating range between an extended position and a retracted position and mounted on the drive screw;
A second motor means mounted fixed to the frame, for rotation of said drive screw, said second motor means is rotatably connected to the drive screw via a clutch;
Wherein said second comprising input coupled shaft and the motor means and the output connected shaft to the drive screw, the clutch only when the output shaft is driven at a faster speed than the speed of said input shaft Said clutch self-releasing so as to disengage from the second motor means ;
A programmable Le logic control system for adjusting the position of the ram at the operation of the first and second motor means, during the ram movement is fast operating phase, than compared with the second motor means The programmable logic control system in which a signal is sent to the first motor means to rotate the drive screw at a high speed , thereby detaching the drive screw from the second motor means ;
A drive device for a ram press characterized by comprising:
Said programmable logic control system, in order to operate the drive screw at a speed slower than said second motor means, the clutch is engaged when sending a signal to said first motor means, whereby said ram driving device according to claim 1, wherein the ram is adapted to move from said second motor means between the high pressure force moving stage.
Further comprising comprising Claim 1 drive according to means for sensing the electrical connection position of the ram to the programmable logic control system.
Said first motor means is the high speed low torque motor, said second motor means has a gear down gearbox which is interposed between said second motor means and the input shaft of the clutch, whereby the input shaft of the clutch, the high torque than the first motor means, driving device of claim 1 that will be driven at a low speed.
Wherein both the first and second motor means, driving apparatus case, always according to claim 1, wherein you rotate the drive screw in the same direction in which these motor means are operated simultaneously.
4. The driving device according to claim 3, wherein the second motor means raises the ram by a calculated separation distance after a high force moving stage is executed while the first motor means is stopped. .
4. A drive device according to claim 3, wherein the means for sensing the position of the ram is an encoder mounted on an end of the drive screw.