Movable plate drive device and press slide drive device

B - Operations – Transporting – 30 – B

Patent

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Details

B30B 1/32 (2006.01) B30B 1/18 (2006.01) B30B 15/00 (2006.01) B30B 15/14 (2006.01) B30B 15/22 (2006.01)

Patent

CA 2594644

A press slide is driven by a composite thrust formed by an electric (servo) motor SM thrust (i.e., thrust from a motor SM via a screw/nut mechanism) and thrust of hydraulic cylinders SYL1, SYL2 supplied with hydraulic oil from a constant high pressure source. A slide control device controls the electric motor SM and hydraulic cylinders SYL1, SYL2 according to the slide position signal and the motor angular velocity signal. The slide control device makes the hydraulic cylinder SYL1 function as a pump during a period when the slide load becomes smaller and makes the constant high voltage source charge hydraulic oil by the thrust transferred from the electric motor SM to the hydraulic cylinder SYL1 via the screw/nut mechanism and the slide.

La présente invention concerne un coulisseau de presse qui est entraîné par une poussée composite formée par une poussée de moteur électrique (servomoteur) (SM) (c'est-à-dire une poussée provenant d'un moteur (SM) par l'intermédiaire d'une commande par vis/écrou) et une poussée de vérins hydrauliques (SYL1, SYL2) alimentés en huile hydraulique provenant d'une source de haute pression constante. Un dispositif de commande de coulisseau commande le moteur électrique (SM) et les vérins hydrauliques (SYL1, SYL2) selon le signal de position de coulisseau et le signal de vitesse angulaire de moteur. Le dispositif de commande de coulisseau fait fonctionner le vérin hydraulique (SYL1) en tant que pompe durant une période lorsque la charge de coulisseau diminue et fait en sorte que la source de haute tension constante charge l'huile hydraulique grâce à la poussée transférée du moteur électrique (SM) au vérin hydraulique (SYL1) par la commande par vis/écrou et le coulisseau.

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