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    Forging press
    2.
    发明授权
    Forging press 失效
    锻压机

    公开(公告)号：US3871202A

    公开(公告)日：1975-03-18

    申请号：US46303974

    申请日：1974-04-22

    Applicant: ASEA AB

    Inventor： CLAESSON HARRY

    IPC: B21J9/12 ,  B21J5/04 ,  B21J9/02 ,  B30B1/32

    CPC classification number: B21J5/04 ,  B21J9/02

    Abstract: A forging press includes a forging chamber into which a forging cylinder can be pressed. The forging cylinder is integral with a main piston arranged in a working cylinder to which pressure fluid can be supplied. The forging piston is slidable within an annular member which is fixed in an axially slidable sleeve, and which can be moved by pressure fluid supplied to either end thereof. Within the main piston is a pressure-equalizing chamber, into which fits a stationary back-pressure piston. Passages are provided connecting the pressure equalizing chamber with the forging chamber. The cross-section of the back-pressure piston is less than that of the forging piston. In the bottom part of the forging chamber there is arranged a groove which connects with a discharge passage. When pressure fluid is applied to the sleeve, it moves downwardly and the annular member engages the bottom of the forging chamber and closes the outlet groove so as to prevent the escape of fluid therefrom. Pressure in the main cylinder then pushes down the forging piston. As the cross-section area of the back-pressure piston is smaller than that of the forging piston, the increase in volume of the pressure-equalizing chamber will not be as great as the decrease in volume of the forging chamber. This in turn leads to an increase in pressure in both chambers. The relation between the cross-section areas of the back-pressure piston and the forging piston is chosen so that a suitable pressure increase is obtained in the chambers.

    Abstract translation: 锻造压力机包括锻造室，锻造缸可以压入其中。 锻造气缸与布置在可供应压力流体的工作气缸中的主活塞一体。 锻造活塞可在环形构件内滑动，该环形构件固定在可轴向滑动的套筒中，并且可通过供应到其任一端的压力流体移动。 在主活塞内部是一个压力平衡室，其内装有固定的背压活塞。 提供了将均压室与锻造室连接的通道。 背压活塞的横截面小于锻造活塞的横截面。 在锻造室的底部设置有与排放通道连接的凹槽。 当压力流体被施加到套筒上时，其向下移动并且环形构件接合锻造室的底部并且关闭出口槽，以便防止流体从其中逸出。 主缸内的压力然后推下锻造活塞。 由于背压活塞的截面积小于锻造活塞的截面积，因此压力均衡室的容积增加不会与锻造室的体积减小一样大。 这又导致两个腔室中的压力增加。 选择背压活塞和锻造活塞的横截面积之间的关系，使得在腔室中获得合适的压力增加。

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