-
公开(公告)号：US3793945A
公开(公告)日：1974-02-26
申请号：US3793945D
申请日：1971-12-23
Applicant: PRZED DOSWIADCZALNE PRAS AUTOM
Inventor： NOWAK E
CPC classification number: B30B1/32
Abstract: A hydraulic power press has a box-shaped frame whose top defines a work space with a bedplate received in that frame, the frame bottom being rigid with a hydraulic cylinder whose piston carries the bedplate. Frame and cylinder are interconnected by columns guiding the bedplate within the frame. The piston has a downwardly projecting rod terminating in an annular flange forming a shoulder which coacts with a set of plungers within the cylinder adapted to be pressurized for moving the piston with the bedplate downwardly. The upper limit of the working stroke of the piston is defined by a rotatable ring threadedly engaging the lower end of the cylinder to form an adjustable abutment for the piston flange. The lower limit of the return stroke is determined by a stud, projecting downwardly from the piston, which on descending coacts with the body of a slide valve whose mounting is fixedly suspended from the cylinder and which, besides cutting off the flow of pressure fluid to the downwardly acting plungers, also cushions the descent of the piston. The stud is threadedly lodged in the piston and can be rotated by a bevel-gear transmission inside the bedplate and the piston for adjusting the lower end of the piston stroke.
Abstract translation: 液压动力压力机具有一个盒形框架，其顶部限定了一个工作空间，该底板容纳在该框架中的底板上，框架底部与活塞带有底板的液压缸刚性。 框架和圆柱体通过在框架内引导底板的柱相互连接。 活塞具有终止于形成肩部的环形凸缘中的向下突出的杆，所述肩部与筒内的一组柱塞共同作用，以适于被加压以使活塞与底板向下移动。 活塞的工作行程的上限由与气缸的下端螺纹接合以形成用于活塞凸缘的可调接合部的可旋转环限定。 返回行程的下限由柱塞决定，该螺柱从活塞向下突出，该螺柱在与安装件从气缸固定悬挂的滑阀的主体下降的同时下降，并且除了将压力流体切断至 向下作用的柱塞也缓冲活塞的下降。 螺柱螺纹地装在活塞中，并且可以通过底板内的锥齿轮传动装置和用于调节活塞冲程的下端的活塞来旋转。
-
公开(公告)号：US3818825A
公开(公告)日：1974-06-25
申请号：US28086672
申请日：1972-08-15
Applicant: PRZED DOSWIADCZALNE PRAS AUTOM
Inventor： NOWAK E
Abstract: The subject of the present invention is a double-acting hydraulic press built with a monolithic frame of a casing type. Fixed slidably within the frame are four columns on which the press platen is rigidly mounted. In this manner there are obtained two working zones of the press: a top and bottom zone, thus eliminating the idle stroke of the press. Both ends of the columns outside of the frame of a casing type are linked together with two plates which are operating jointly with power plungers. The power plungers are working inside the cylinders mounted on the bottom and the top plate of the frame. Such a design ensures a reciprocal reduction of reactions from the cylinder and from the tool, these reactions affecting the frame which in this instance does not show any practical deformation.
Abstract translation: 本发明的目的是一种双层液压机，其具有壳型的整体式框架。 在框架内可滑动地固定有四个柱，压板刚性地安装在该柱上。 以这种方式，获得了压机的两个工作区：顶部和底部区域，从而消除了压机的空转行程。 壳体框架外侧的两端的两端与与功率柱塞共同操作的两个板连接在一起。 功率柱塞在安装在框架的底部和顶板上的气缸内部工作。 这种设计确保了来自气缸和工具的反应的相互减少，这些反应影响框架，在这种情况下，这种反应不会显示任何实际的变形。
