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    • 2. 发明授权
    • Hydraulic press platon support
    • 液压机压板支架
    • US4873923A
    • 1989-10-17
    • US239040
    • 1988-08-29
    • Douglas E. Manning
    • Douglas E. Manning
    • B30B1/34B30B15/00B30B15/06
    • B30B15/068B30B1/34B30B15/0052
    • A hydraulic press for compacting materials with a large platen area has a platen support comprising of four hydraulic cylinders, one at each corner of a rectangular or square shaped platen. The cylinders are supplied with near equal fluid flows from commercially available hydraulic flow dividers. When an off-centered platen loading is encountered, the cylinders will respond with a higher restraining force from the cylinders nearest the load with relatively small bending moments transferred to the cylinder rods. The resulting platen structural load resembles a beam supported with pinned connections. The resulting press capacity can be significantly higher than that achievable with guided type platen supports of similar costs where the bending moment is restrained by the stiffness of the guides.
    • 用于压制具有大压板区域的材料的液压机具有由四个液压缸组成的压板支架,一个在矩形或正方形压板的每一个角上。 气瓶由市售的液压分流器供应近似相等的流体流量。 当遇到偏心的压板加载时,气缸将以更接近负载的气缸的较高的约束力作出响应,相对较小的弯矩传递到气缸杆。 所得到的压板结构负载类似于用固定连接支撑的梁。 所产生的压力容量可以显着地高于用类似成本的导向型压板支架可实现的冲击力,其中弯矩受到引导件的刚度的限制。
    • 3. 发明授权
    • Apparatus and method for fabricating elliptical tubing
    • 椭圆管制造装置及方法
    • US4930331A
    • 1990-06-05
    • US315284
    • 1989-02-24
    • Douglas E. Manning
    • Douglas E. Manning
    • B21D22/02B21D41/00
    • B21D22/025B21D41/00
    • An apparatus (10) and method for fabricating metal tubing of generally elliptical shape by cold pressing round tubing stock into the desired shape. The apparatus (10) includes a first pair of opposing dies (16 and 18) secured to the platens (12and 14) of a press for forming the substantially flattened sides of the tubing. A second pair of opposing dies, positioned substantially between and on either side of the first pair of dies, is provided for forming the substantially rounded sides of the elliptical tubing. Means (52) for providing a preselected rate of resistance to movement of the second pair of opposing dies as they are engaged by the substantially rounded sides of the tubing, such that the tubing can be pressed into the desired substantially elliptical shape defined by the die faces of the first and second pairs of opposing dies by operating the press to move the platens (12 and 14) toward one another, are provided.
    • 一种用于通过将圆管材料冷压成所需形状来制造大致椭圆形金属管的装置(10)和方法。 装置(10)包括固定到压力机的压板(12和14)上的第一对相对的模具(16和18),用于形成管道的基本扁平的侧面。 提供基本上位于第一对模具的两侧之间并且位于第一对模具的任一侧上的第二对相对的模具,用于形成椭圆形管道的基本圆形的侧面。 用于当所述第二对相对的模具被所述管道的基本上圆形的侧面接合时提供对所述第二对相对的模具的运动的预选速率的装置(52),使得所述管道可以被压入所述模具限定的期望的大致椭圆形状 提供通过操作压力机使第一和第二对相对的模具的表面彼此相对移动压板(12和14)。