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    • 2. 发明授权
    • Method for controlling the drive of a hydraulic press
    • 控制液压机驱动的方法
    • US5460084A
    • 1995-10-24
    • US208745
    • 1994-03-11
    • Carsten OtrembaGuenther SchaichJoachim Beyer
    • Carsten OtrembaGuenther SchaichJoachim Beyer
    • B30B15/00B30B1/32B30B15/16B30B15/18B30B15/20
    • B30B1/323B30B15/161B30B15/163B30B15/18
    • A method for controlling a drive for a hydraulic press employed for at least one of forming and cutting sheets of metal. The method involves a press comprising: a press ram and at least one piston-cylinder unit operatively connected to the press ram and including a drive piston having an upper side and a lower side, the drive piston further comprising an upper cylinder chamber communicating with the upper side, and a lower cylinder chamber communicating with the lower side. The method comprises the step of pressurizing the drive piston with hydraulic medium on at least one of its upper side and its lower side for driving the press ram. The step of pressurizing comprises the steps of: supplying a system pressure network including pressure lines operatively connecting the upper cylinder chamber and the lower cylinder chamber with hydraulic medium at a predetermined maximum operating pressure from a hydraulic accumulator unit thereby equalizing pressures between the upper side and the lower side; and producing a downward movement of the press ram by extracting hydraulic medium from the lower cylinder chamber with a first hydraulic motor having an adjustable swivel angle and thereafter feeding the hydraulic medium to the upper cylinder chamber to pressurize the upper cylinder chamber thereby effecting a controlled volumetric flow of hydraulic medium through the pressure network.
    • 一种用于控制液压机的驱动装置的方法,所述液压机用于形成和切割金属板中的至少一个。 该方法涉及一种压力机,包括:压力冲头和可操作地连接到压力冲头的至少一个活塞 - 气缸单元,并且包括具有上侧和下侧的驱动活塞,所述驱动活塞还包括与气缸室连通的上气缸室 上侧和与下侧连通的下气缸室。 该方法包括在其上侧和下侧的至少一侧上用液压介质对驱动活塞进行加压以驱动压力机的步骤。 加压步骤包括以下步骤:提供包括压力线的系统压力网络,该压力线将来自上部气缸室和下部气缸室的液压介质与来自液压蓄能器单元的预定最大工作压力的液压介质相结合,从而使上侧和 下侧 并且通过用具有可调节的旋转角度的第一液压马达从下部气缸室中提取液压介质,然后将液压介质输送到上部气缸室以对上部气缸室进行加压,从而实现受控体积 液压介质流经压力网。