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242 条记录 (耗时 0.013 秒)

    Hydraulic cylinder
    47.
    发明授权
    Hydraulic cylinder 有权

    公开(公告)号：US11167338B2

    公开(公告)日：2021-11-09

    申请号：US16092871

    申请日：2017-03-31

    申请人： SMS group GmbH

    发明人： Karsten Busch ,  Paul-Josef Nieschwietz ,  Frederik Knauf

    IPC分类号： F15B11/02 ,  B21J9/12 ,  F15B11/036 ,  F15B15/14

    摘要： A hydraulic cylinder comprising a cylinder, a piston element movably guided in the cylinder in a working direction and comprising an active surface, and a first opening for feeding a fluid into a cylinder chamber by the active surface. A working pressure of the fluid acting on the active surface drives the piston element in the working direction. The active surface includes a first partial surface and at least one second partial surface, the cylinder chamber being divided into a first sub chamber with the first opening by the first active surface and a second partial surface with a second opening by the second partial surface, and the partial surfaces are hydraulically separated from each other at least in a selectable operating mode.

    Striking unit and method for material processing by the use of high kinetic energy
    48.
    发明授权
    Striking unit and method for material processing by the use of high kinetic energy 有权

    公开(公告)号：US10661331B2

    公开(公告)日：2020-05-26

    申请号：US15127683

    申请日：2015-03-06

    申请人： CELL IMPACT AB

    发明人： Anders Ivarson ,  Erika Henriksson ,  Alem Buljubasic

    IPC分类号： B21J9/00 ,  B21J9/20 ,  B21J9/12 ,  B21J13/06 ,  B21J13/02 ,  B30B15/16

    摘要： The present invention relates to a method at the material processing by the use of high kinetic energy, comprising a piston which is driven from a start position by a hydraulic system pressure (pS) by means of a drive chamber in order, by only one stroke, to transfer high kinetic energy to a blank/tool to be processed, whereafter there is a risk that a rebound of the piston will occur, and the method comprises that a step is taken in connection with said stroke performed, which step prevents said piston from making a rebound with an essential content of kinetic energy in order to avoid negative effects as a result of a rebound, whereafter the piston is returned to said start position by means of a second chamber, wherein said step comprises that a valve means closes the driving connection between the system pressure (pS) and the piston, wherein said step comprises that said valve means is controlled by a pilot valve controlling the entire striking progress, and that said second chamber is pressurized with the system pressure (pS) during the entire striking progress.

    HYDRAULIC KNOCKOUT DEVICE
    49.
    发明申请
    HYDRAULIC KNOCKOUT DEVICE 审中-公开

    公开(公告)号：US20180214932A1

    公开(公告)日：2018-08-02

    申请号：US15877813

    申请日：2018-01-23

    申请人： AIDA ENGINEERING, LTD.

    发明人： Yasuyuki KOHNO

    IPC分类号： B21J13/14 ,  F15B11/20 ,  F15B1/02 ,  F15B21/04 ,  B21J9/12

    CPC分类号： B21J13/14 ,  B21J9/12 ,  B30B15/163 ,  F15B1/02 ,  F15B11/20 ,  F15B21/042 ,  F15B2211/212 ,  F15B2211/62

    摘要： A part of kinetic energy during lowering of a slide of a press machine is converted into oil hydraulic energy by a first oil hydraulic cylinder, and the converted oil hydraulic energy (hydraulic oil having boosted first system pressure) is stored in a first accumulator. The hydraulic oil having the first system pressure stored in the first accumulator is discharged in knockout process, a second oil hydraulic cylinder that functions as a knockout cylinder is raised to perform knockout operation of a product worked by the press machine. Consequently, it is possible to perform knockout operation without using a dedicated driving source such as an oil pressure source and an air pressure source, and provide a low-cost hydraulic knockout device.

    STRIKING UNIT AND METHOD FOR MATERIAL PROCESSING BY THE USE OF HIGH KINETIC ENERGY
    50.
    发明申请
    STRIKING UNIT AND METHOD FOR MATERIAL PROCESSING BY THE USE OF HIGH KINETIC ENERGY 审中-公开

    公开(公告)号：US20170136522A1

    公开(公告)日：2017-05-18

    申请号：US15127683

    申请日：2015-03-06

    申请人： CELL IMPACT AB

    发明人： Anders IVARSON ,  Erika HENRIKSSON ,  Alem BULJUBASIC

    IPC分类号： B21J9/20 ,  B21J13/06 ,  B21J9/12

    摘要： A method of processing a material by use of high kinetic energy comprises a piston driven from a start position by a hydraulic system pressure by a drive chamber, by only one stroke, to transfer high kinetic energy to a blank/tool to be processed, whereafter there is a risk that a rebound of the piston will occur, so a step is taken in connection with said stroke performed, to prevent said piston from making a rebound with an essential content of kinetic energy to avoid negative effects as a result, whereafter the piston is returned to said start position by means of a second chamber, wherein a valve means closes the driving connection between the system pressure and the piston, the valve means is controlled by a pilot valve controlling the entire striking progress, and the second chamber is pressurized with the system pressure during the entire striking progress.