Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Patent
1989-08-15
1991-02-19
Gorski, Joseph M.
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
29DIG48, 29DIG49, 123 9051, 228112, B21K 122
Patent
active
049931504
ABSTRACT:
A process for the production of cup tappets for reciprocating-piston machines having a pressure plate made from wear-resistant alloyed tool steel and a cup casing, welded to the pressure plate, and made from cheap and cold-extrudable steel utilizes a friction welding process to weld the two parts to one another in a crack-free manner. The cup casing blank is produced by the cold-extrusion process and is carbonized before the welding so that good welding results can thereby be achieved despite the considerable strength differences and cross-sectional differences between the pressure plate and cup casing blanks. As a result of a preheating of the pressure plate, an impairment of the cup casing blank during the frictional heating can be compensated and cracks in the workpiece during or immediately after the welding can thereby be avoided. The pressure plate blank can be designed as a flat round which can be produced by stamping and which projects radially to a pronounced extent relative to the cup casing blank, so that it can be tensioned in an overhand region during the friction welding. The outer overhang containing possible cracks is removed in a subsequent chip-removing, preferably grinding operation.
REFERENCES:
patent: 1468927 (1923-09-01), Spire
patent: 2055342 (1936-09-01), Schneider
patent: 3060560 (1962-10-01), Biehl et al.
patent: 3657800 (1972-04-01), Hautala et al.
patent: 4073474 (1978-02-01), Hashimoto et al.
patent: 4251273 (1981-02-01), Smith et al.
F. Technische Stahlsorten, Gewaltz Oder Geschmiedt, pp. 1078, 1082-1083, BD. I., 7. Abschn: Stoffkunde, III Eisen Und Stahl.
Reinhardt Rudolf
Zechmann Hans
Daimler-Benz AG
Gorski Joseph M.
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