公开(公告)号：US4207048A

公开(公告)日：1980-06-10

申请号：US973291

申请日：1978-12-26

申请人： Eric W. Seymour

发明人： Eric W. Seymour

IPC分类号： B21D5/02 ,  B21D22/00 ,  B30B15/00

CPC分类号： B30B15/0047 ,  B21D22/00 ,  B21D5/02

摘要： A power press in which a ram is driven towards and away from a press bed so that, in use, a work piece is deformed by a tool mounted between the ram and the press bed is provided with means by which a jam in the press can be released both quickly and simply, this release means comprising a layer of heat softenable rigid plastics material which is located in the press so that the direction of the press stroke is substantially normal to the layer and so that during a pressing operation the layer is subjected to compressive stress in the direction of press stroke, and electrical heating means located so that it is capable of heating the layer of plastics material, when desired, to a temperature sufficient for the plastics material to soften whereby, under compression in the direction of the press stroke, the thickness of the plastics layer decreases. Preferably the electrical heating means comprises an element which is embedded in a metal layer which fits face to face with the plastics layer, and is preferably sandwiched between two plastics layers, to form a spacer assembly which is fitted in the press, usually between the tool and the ram, or between the tool and the press bed.

摘要翻译： 一种电动压力机，其中冲压器朝向和远离压床驱动，使得在使用中，通过安装在压头和压床之间的工具使工件变形，设置有压力机卡住的装置 这种释放装置能够快速且简单地释放，该释放装置包括位于压机中的可热软化的刚性塑料材料层，使得冲压行程的方向基本上垂直于该层，并且使得在压制操作期间该层受到 压力冲程方向的压缩应力;以及电加热装置，其位置使得其能够在需要时将塑料材料层加热至足以使塑料材料软化的温度，从而在压缩下沿着 冲压行程，塑料层的厚度减小。 优选地，电加热装置包括嵌入在与塑料层面对面配合的金属层中的元件，并且优选地夹在两个塑料层之间，以形成安装在压机中的间隔件组件，通常在工具 和冲头，或工具与压床之间。