Hydraulic press drive

B - Operations – Transporting – 30 – B

Patent

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Details

B30B 15/16 (2006.01) F15B 21/14 (2006.01)

Patent

CA 2202523

The invention relates to a drive system for a hydraulic press. The drive system is designed as a secondarily regulated system in which there is a hydraulic transformer (6, 7) consisting of two mechanically coupled hydrostatic machines (6, 7), each with adjustable intake and delivery volumes. The first machine (6) is connected to a pressure system (3, 4) with a constant or imposed pressure and the second (7) is connected to the pressure cylinder (16). According to the invention, the drive system is designed in such a way that the prestress on the pressure cylinder (16) and the process in fast motion and pressure stroke, the decompression of the pressure cylinder and the rinsing of hot working medium in the closed circuit takes place without any choke losses or power is recovered via the hydraulic transformer.

L'invention concerne un système d'entraînement pour une presse hydraulique. Le système d'entraînement se présente sous forme de système à régulation secondaire, pour lequel il est prévu un transformateur (6, 7) hydraulique comprenant deux moteurs (6, 7) hydrostatiques accouplés mécaniquement et ayant chacun des volumes absorbé et refoulé ajustables. Le premier moteur (6) est raccordé à un système pressurisé (3, 4), à pression constante ou à pression indépendante, et le second moteur (7) est relié au cylindre à presser (16). Selon l'invention, le système d'entraînement se présente de manière à ce que la prétension du cylindre à presser (16), ainsi que le processus en régime accéléré et pendant la course de la presse, la décompression du cylindre à presser, ainsi que le rinçage du fluide de travail très chaud s'effectuent en circuit fermé, sans pertes d'étranglement, ou que de l'énergie soit récupérée par l'intermédiaire du transformateur hydraulique.

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