Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1986-12-17
1988-08-09
Echols, P. W.
Metal working
Method of mechanical manufacture
Assembling or joining
29157R, 72370, B21D 3900
Patent
active
047618736
DESCRIPTION:
BRIEF SUMMARY
The invention concerns a method of manufacturing a hose stem for hydraulically loaded friction fittings or threaded fittings, with a stem end that a hose can fit over, a securing component that accepts the connection, and a joining pipe, whereby the surface of the end of the stem is shaped to position the hose securely and the securing component has a groove for securing the connection. A hose stem is to be understood as the part of a friction or threaded fitting that has a stem end, a securing component, and a joining pipe. The invention relates to hose stems that are subjected to pressure from a medium. The connection can be established with the hose stem by inserting one part straight into another or by screwing one threaded part into another.
One known method of manufacturing a hose stem involves two starting components. The stem end and the securing component are machined, turned and drilled that is, from a solid piece of material, metal for instance. It is possible in this way to shape the piece of material in any way desired by different types of processing. There is a drawback, however, in that most of the material ends up in the form of chips, with the final shape often accounting for only a third of the original blank. Since the second starting component in this manufacturing method is a joining pipe welded onto the end of the securing component that is remote from the stem end, some of the starting material already consists of a pipe.
The purpose of the joining pipe is to accept a sealing head, a connecting branch, a flange connector, or a similar connector if desired, although it can in the final analysis constitute the hose stem without a connector. Hose stems for conveying and conducting hydraulic media are, as is known, manufactured in a light and in a heavy version. What differentiates the two versions are the different diameters and wall thicknesses of the joining pipe. The same stem dimensions, however, are employed, meaning that the geometrical measurements of the stem end and securing component are identical for the light and for the heavy versions. The only difference is in the soldering bore at the free end of the securing component, depending on whether a light or a heavy joining pipe is to be soldered on.
Manufacturing hose stems by welding them together from three components is also known. The first component to be manufactured, by machining pipe material, is the stem end. The second component, the securing component, is machined from a solid piece. The third component is the joining pipe, one type for the heavy version and one for the light. When the components are assembled, when, that is, the hose stem is manufactured, the three components are butt welded together. Although manufacturing a hose stem from three components does result in less waste due to the exploitation of piping for the stem end, the method does demand additional welding between the securing component and the stem end. Butt welding the three componets together also produces at least two elevated welding beads on the inner surface of the hose stem, which decrease the pressure on the medium. The multiplicity of components in different embodiments demands the maintenance of a large stock if they are to be supplied rapidly.
The object of the invention is to improve and simplify a method of manufacturing a hose stem of the type initially described to the extend that the hose stem can be manufactured more economically than heretofore.
This object is attained in accordance with the invention in that the hose stem is manufactured along with its end, securing componet, and joining pipe by cold forming out of a continuous length of pipe. This method of manufacture not only utilizes the material better but also eliminates the need to fasten and especially to weld separate components together, so that the channel through the hose stem is not constricted by welding beads. The result is a ready supply of parts from a reduced and simplified stock because hose stems that can be employed with either light or heavy piping and wi
REFERENCES:
patent: 1265709 (1918-05-01), Dies
patent: 1980264 (1934-11-01), Giesler
patent: 4452063 (1984-06-01), Sebastiani et al.
patent: 4625537 (1986-12-01), Aleck
Matuszczak Bernd
Wetzel Hans J.
Aeroquip GmbH
Cuda Irene
Echols P. W.
Fogiel Max
LandOfFree
Method of manufacturing a hose stem for hydraulically loaded fri does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of manufacturing a hose stem for hydraulically loaded fri, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of manufacturing a hose stem for hydraulically loaded fri will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-911122