Mold opening/closing control apparatus
    11.
    发明公开
    Mold opening/closing control apparatus 失效
    Vorrichtung zum Steuern desÖffnens/ Schliessens einer表格。

    公开(公告)号:EP0485843A1

    公开(公告)日:1992-05-20

    申请号:EP91118739.1

    申请日:1991-11-04

    CPC分类号: G05D3/14 B29C45/67 B29C45/82

    摘要: An oil circuit in which a meter-in circuit and a differential circuit are combined is disposed. Oil is supplied from a variable capacity pump (1) in order to make a mold opening/closing control apparatus operate. A position instruction signal (Xe ref ) obtained by integrating a velocity instruction signal (dXe ref /dt) and a positional deviation (Xe ref -Xe) of the displacement of the mold opening/closing control apparatus are obtained. A flow-rate instruction signal (q ref ) is set by the positional deviation. Then, a differential switching determining section (12) receives the positional deviation and determines differential switching, following which a differential change-over valve (5) switches between the meter-in circuit (II) and the differential circuit (I). With a gain switching section (13) connected to the differential switching determining section (12), the gain switching section (13) switches between a pump gain (PG1) for the meter-in circuit and a pump gain (PG2) for the differential circuit. The above variable capacity pump (1) is controlled by the switched pump gain. A fixed capacity pump (21) may be connected to the variable capacity pump (1) and used. In such a case, switching between un-load and on-load is performed in response the reception of a flow-rate instruction signal from the gain switching section.

    摘要翻译: 配置了输入电路和差分电路组合的油路。 油从可变容积泵(1)供应,以使模具打开/关闭控制装置工作。 获得通过对模具打开/关闭控制装置的位移的速度指令信号(dXeref / dt)和位置偏差(Xeref-Xe)进行积分而获得的位置指令信号(Xeref)。 流量指令信号(qref)由位置偏差设定。 然后,差分切换判定部(12)接收位置偏差并确定差动切换,差动切换阀(5)在导入电路(II)和差分回路(I)之间切换。 利用与差分切换判定部(12)连接的增益切换部(13),增益切换部(13)在输入电路的泵浦增益(PG1)与差动切换部的泵浦增益(PG2)之间切换 电路。 上述可变容量泵(1)由开关泵增益控制。 固定容量泵(21)可以连接到可变容量泵(1)并使用。 在这种情况下,响应于来自增益切换部的流量指令信号的接收而执行负载和负载之间的切换。

    Stroke control of press
    13.
    发明公开
    Stroke control of press 失效
    新闻的控制

    公开(公告)号:EP0067037A3

    公开(公告)日:1983-08-03

    申请号:EP82302855

    申请日:1982-06-03

    申请人: USM Corporation

    IPC分类号: B30B15/18

    摘要: A method and apparatus for controlling the stroke of a press in which the movements of two portions of a movable platen (28; 128) of the press are continuously sensed during a stroke. A signal is generated whose magnitude at any time during a stroke is dependent on the sum of the distances moved by the two portions of the movable platen (28; 128) during the stroke. The signal is compared with a preselected value which is selected in accordance with the length of the stroke required and the stroke is terminated when the magnitude of the signal equals the preselected value.

    Hydraulische Presse
    18.
    发明公开
    Hydraulische Presse 审中-公开
    液压机

    公开(公告)号:EP2724852A3

    公开(公告)日:2014-10-01

    申请号:EP13004253.4

    申请日:2013-08-29

    摘要: Eine hydraulische Presse besitzt einen Arbeitszylinder (11), in dem ein Hauptkolben (12) verschieblich aufgenommen ist, der im Inneren des Arbeitszylinders (11) zumindest eine Kammer (11a) definiert. Das Volumen der Kammer (11a) ändert sich in Abhängigkeit von der Bewegung des Hauptkolbens (12), wobei der zumindest einen Kammer (11a) eine Befüllvorrichtung (13) zugeordnet ist, mittels der der Kammer (11a) bei sich vergrößerndem Volumen Hydraulikflüssigkeit über eine Befüllleitung (14) zuführbar ist, in der ein 1. Absperrventil (15) sitzt, das in einem Ventilgehäuse (16) angeordnet ist. Um einen kompakten Aufbau zu erzielen, ist in dem Ventilgehäuse (16) ein Rückführungskanal (28) ausgebildet, durch den Hydraulikflüssigkeit aus der Kammer (11a) abführbar ist, wobei in dem Rückführungskanal (28) ein 2 Absperrventil (24) angeordnet ist.