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    • 81. 发明授权
    • Hydraulically operated cropping apparatus
    • 液压操作装置
    • US3800645A
    • 1974-04-02
    • US29089272
    • 1972-09-21
    • FASTENERS ENG INC
    • ALCOCK RSHOSIE W
    • B23D25/04
    • B23D25/04Y10T83/2029Y10T83/412Y10T83/4659Y10T83/4676Y10T83/4728Y10T83/4763
    • An apparatus for shearing end sections from elongated metal stock in which the shear members are moved crosswise of the stock in a shear stroke and returned by an hydraulic operator. Fluid under pressure is reversibly supplied to the hydraulic operator under the control of a flow reversing valve having an electroresponsive actuator, and the distance through which the hydraulic operator moves the shear members is controlled by an interval timer which applies an electrical pulse to the electro-responsive valve operator of a duration sufficient to cause the hydraulic operator to move the shear members in their shear stroke. The interval timer is actuated by a stock gauge after a predetermined length of stock has advanced past the shear members. The shear members are advantageously mounted on a movable carriage for movement with the stock.
    • {PG,1一种用于从细长金属坯料剪切端部的装置,其中剪切构件在剪切行程中横向移动该材料并由液压操作器返回。 在具有电响应致动器的流动反向阀的控制下,压力下的流体被可逆地供应到液压操作器,液压操作者移动剪切构件的距离由间隔计时器控制,该间隔计时器将电脉冲施加到 电响应阀操作者的持续时间足以使液压操作者在剪切行程中移动剪切构件。 间隔定时器在预定长度的库存已经超过剪切构件的情况下由库存量规致动。 剪切构件有利地安装在可移动的托架上以与坯料一起移动。