| 摘要 |
<p>A high pressure coupling for hose-like objects in which the nipple structure includes a main portion, a connecting nipple portion extending from the main portion in one direction and a nipple portion extending from the main portion in the opposite direction. A sleeve-like member made from tubular stock is adapted to be securely connected to the nipple structure by crimping, flanging or the like. The nipple portion includes outwardly projecting, rounded-off ribs cooperating with rounded-off grooves in the sleeve-like member so that the hose inserted between the nipple portion and the sleeve-like member is held securely in position after the nipple portion is internally expanded with subsequent reduction of the cylindrical surface of the sleeve-like member. Both the nipple structure as well as the sleeve-like member are made from appropriate stock machined accurately to the required dimensions. Sharp edges provided in the nipple main portion will anchor themselves securely in the crimped or flanged-over end of the sleeve-like member to assure a secure fastening between these two parts. A ram-actuated machine for installing the coupling of this invention includes a frame structure which supports a die assembly as well as guide columns slidingly supporting a ram cap assembly. A ram head assembly to which a mandrel carrying one or more expanding members is connected, is adapted to be reciprocated by the hydraulic ram mechanism with the parts so arranged and constructed that initially the expanding member or members will expand the nipple portion during downward movement of the ram head mandrel assembly. The internal expansion of the nipple portion is completed when the ram head assembly comes to rest on the ram cap assembly, itself resting on the main nipple portion. Further downward movement of the ram head assembly will cause the sleeve-like member to be forced through the reducing die by way of the ram cap assembly and the main nipple portion to which the sleeve-like member is securely connected.</p> |
