公开(公告)号：EP0437305A1

公开(公告)日：1991-07-17

申请号：EP91300009.7

申请日：1991-01-02

Applicant: REYNOLDS METALS COMPANY

Inventor： Haulsee, Donald R. ,  Steinbuchel, Herman J. ,  Wallace-Daye, Sandra K. ,  Matthews, Brian L.

IPC: B21D22/28 ,  B21D51/26

CPC classification number: B21D51/26 ,  B21D22/28

Abstract: The ram is supported through a hydrostatic type bearing support assembly mounted on a main frame. The support bearings are formed with a unique arrangement of hydrostatic pressure pad slots and hydrodynamic stepped end sections to center the ram with constantly pressurized and flowing oil films supplied through the pressure pad slots. The hydrodynamic bearing sections provide hydrodynamic support at high reciprocating speeds and the pressure pad slots provide hydrostatic support at lower reciprocating speeds that occur at the end of the working and return strokes of the ram. A piston and cylinder arrangement mounted to the bearing housing imparts a deflection force against the ram, between the end bearings and through a center bearing, to counteract gravitational vertical deflection of the unsupported working end of the ram. A cardan type crank drive mechanism for converting rotational input force into straight line reciprocating movement of an output shaft is also disclosed.

Abstract translation: 压头通过安装在主框架上的静液压轴承支撑组件支撑。 支撑轴承由独特的流体静力压力垫槽和流体动力阶梯端部分组成，用于使压头对中，使不断加压流动的油膜通过压力垫槽提供。 流体动力轴承部件以高往复速度提供流体动力支撑，并且压力垫槽在压头的工作和返回冲程结束时以较低的往复运动速度提供静液压支撑。 安装到轴承壳体上的活塞和气缸装置在端部轴承之间和通过中心轴承之间施加抵靠压头的偏转力，以抵消压头的未受支撑的工作端的重力垂直偏转。 还公开了一种用于将旋转输入力转换成输出轴的直线往复运动的万向型曲柄驱动机构。