Metal fusion bonding – Process – With shaping
Patent
1977-04-28
1979-03-06
Lanham, C.W.
Metal fusion bonding
Process
With shaping
228174, 228 13, 228 17, 228 175, 291635R, 72186, 83345, B23K 3106, B21C 3715
Patent
active
041426630
ABSTRACT:
A rolled sheet metal tube having perforations therein with integrally formed associated protrusions. The protrusions alter the direction of the flow of fluid passing through the tube and ideally suit the tube for employment in mufflers for internal combustion engines. A tube mill incorporating a roll press as its first pass to perforate sheet metal strip as it is fed to the mill. The roll press comprises a die roll having circumferentially continuous slots extending therearound and a punch roll having spaced punches for entry into the slots of the die roll as sheet metal strip is drawn between the rolls. The punches form perforations in the strip as the strip is drawn between the rolls and in certain embodiments the slots and/or punches are configured to form protrusions in the strip simultaneously with the formation of the perforations. In the embodiments where protrusions are formed, the strip engaging elements of the mill are preferably configured to accommodate the protrusions as the strip is processed to the desired tubular configuration. Ejector fingers extend into the continuous grooves in the die roll to eject punched out strip material from the grooves.
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patent: 3524245 (1970-08-01), Searing
patent: 3682028 (1972-08-01), Clayton
patent: 4068366 (1978-01-01), Hillesheim
Blatnik George A.
Kosareff John W.
Kaiser Steel Corporation
Lanham C.W.
Ramsey K. J.
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