Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1997-11-28
1999-08-17
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
72377, B21K 124
Patent
active
059376929
ABSTRACT:
Using the described method it is possible to manufacture an armature housing of a slide valve integrally including the connection sockets. The method makes use of two forging processes, which are both carried out in the same forging mould (1): The first forging process is designed as a forward flow pressing process, in which the blank (3) is forced into the lower region of the mould cavity (2) with the aid of a first mandrel (4) and thereby also fills the cylindrical recesses (2b) of the mould cavity (2), which correspond to the subsequent connection sockets. The second forging process is designed as a return flow pressing process, in which, by means of a second mandrel (5) having corresponding dimensions, the entire interior (12) of the subsequent armature housing is formed with the exception of the supply and outflow ducts which penetrate the connection sockets. The guide elements, which are used for guiding the sealing member of the slide valve during the movement between the open and closed positions, are preferably simultaneously formed by the second mandrel (5) during the return flow pressing process.
REFERENCES:
patent: 2298077 (1942-10-01), Witter
patent: 2663205 (1953-12-01), Allen
patent: 3210984 (1965-10-01), Arbogast
Babcock Sempell AG
Larson Lowell A.
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