Metal fusion bonding – Process – Using explosive energy
Patent
1980-03-05
1982-05-04
Baldwin, Robert D.
Metal fusion bonding
Process
Using explosive energy
219121ED, B23K 2008
Patent
active
043278590
ABSTRACT:
A method of providing a wear-resistant layer on the inner bore faces of the housing of a dual-worm extruder having two longitudinally communicating parallel bores for accommodating extruder worms therein. According to the method, a relatively soft sheet metal blank and a relatively hard, wear-resistant sheet metal blank are metallurgically bonded to one another in a face-to-face relationship, then the thus obtained "sandwich" is deformed into two longitudinally open tubular blanks, with the relatively soft sheet metal blank forming the outer, convex side of each tubular blank. Thereafter, the tubular blanks are welded to one another along respective longitudinal edges thereof for obtaining a composite body having a cross-sectional outline of a FIG. 8, generally corresponding to, but being smaller than the cross-sectional outline of the bores. Then the composite body is introduced into the housing in a substantially coaxial relationship with the bores, and an explosive is placed in the space surrounded by the composite body and the explosive is ignited for effecting a plating of the inner bore faces with the composite body.
REFERENCES:
patent: 3140537 (1964-07-01), Popoff
patent: 3292253 (1966-12-01), Rossner et al.
patent: 3728780 (1973-04-01), Chang
Baldwin Robert D.
Firma Friedrich Theysohn
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