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    • 45. 发明申请
    • WORKPIECE SUPPORT DEVICE
    • 工作支持设备
    • WO98035780A1
    • 1998-08-20
    • PCT/GB1998/000426
    • 1998-02-11
    • B23K37/04B23Q1/03H05K13/00B25B1/24
    • H05K13/0069B23K37/0408B23K2101/42B23Q1/032
    • A workpiece support device comprises an array of rods (2) in columns and rows with free ends of the rods forming a support surface, in which support surface recesses can be created by selectively retracting individual ones of the rods (2). Each rod (2) is coupled to a respective piston (3) within a respective cylinder (1) and each cylinder (1) has an upper connection (4) for medium pressure, a lower connection (7) for high pressure and a middle connection (8) for low pressure. A trigger piston (5) is provided in a cylinder (6) below the piston (3). The rod (2) can be caused to extend from the cylinder (1) by applying low pressure to the connection (8) to press the trigger piston (5) downwardly to close the high pressure connection (7). Such low pressure passes around the lip of a lip seal (24) on the trigger piston (5) and through a connection (28) pressurises the underside of the piston (3) to raise the piston (3) and release it from pressing the trigger piston (5) downwardly. Subsequently pressurising the connections (4 and 7) causes the differential pressure to force the piston (3) upwardly. However by sequencing the application of pressure to the connections (4, 7 and 8) the rod (2) can be locked in the retracted position. Medium pressure applied to the connection (4) presses the piston (3) downwardly to abut the trigger piston (5) and hold it in a depressed condition in which it will remain even after pressure is restored to the high pressure connection (7).
    • 工件支撑装置包括列和列的阵列(2),其杆的自由端形成支撑表面,其中可以通过选择性地缩回单个杆(2)来产生支撑表面凹部。 每个杆(2)联接到相应气缸(1)内的相应的活塞(3),并且每个气缸(1)具有用于中压的上连接件(4),用于高压的下连接件(7) 连接(8)用于低压。 触发活塞(5)设置在活塞(3)下方的气缸(6)中。 可以通过向连接件(8)施加低压使杆(2)从气缸(1)延伸,向下按压触发活塞(5)以关闭高压连接件(7)。 这种低压力通过触发器活塞(5)上的唇形密封件(24)的唇缘并且通过连接(28)对活塞(3)的下侧加压以升高活塞(3)并将其从压制 向下触发活塞(5)。 随后对连接件(4和7)进行加压使得压差将活塞(3)向上压。 然而,通过对连接(4,7和8)施加压力进行排序,杆(2)可以锁定在缩回位置。 施加到连接件(4)的中等压力向下按压活塞(3)以抵靠触发活塞(5)并将其保持在压力恢复到高压连接(7)之后将保持的凹陷状态。