US 12,303,959 B2
Device and method for open-loop or closed-loop control of a movement of a die cushion of a die cushion press
Werner Handle, Marbach am Neckar (DE); and Achim Helbig, Stuttgart (DE)
Assigned to Moog GmbH, Boblingen (DE)
Appl. No. 17/627,074
Filed by Moog GmbH, Boblingen (DE)
PCT Filed Jul. 16, 2020, PCT No. PCT/EP2020/070146
§ 371(c)(1), (2) Date Jan. 13, 2022,
PCT Pub. No. WO2021/009285, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 102019119392.3 (DE), filed on Jul. 17, 2019.
Prior Publication US 2022/0250133 A1, Aug. 11, 2022
Int. Cl. B21D 24/14 (2006.01); G05B 19/18 (2006.01); H02P 23/00 (2016.01)
CPC B21D 24/14 (2013.01) [G05B 19/182 (2013.01); H02P 23/00 (2013.01); G05B 2219/45142 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A device for open-loop or closed-loop control of a movement of a die cushion of a die cushion press, comprising:
a control value encoder;
a speed controller;
a current controller; and
a motor control device for providing a nominal current for an electrical drive of a fluid-hydraulic motor pump unit for moving a die cushion of a die cushion press;
wherein the control value encoder is provided in order to calculate a target setpoint speed based on a die cushion control value command and a die cushion information;
wherein the speed controller is provided in order to calculate a setpoint current based on the target setpoint speed;
wherein the speed controller uses a setpoint speed which comprises a disturbance variable;
wherein a velocity of the die cushion of the die cushion press is connected as the disturbance variable;
wherein the current controller is provided in order to calculate a control signal based on the setpoint current; and
wherein the motor control device is provided in order to calculate the nominal current based on the control signal.