B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
26/146
B21D 53/02 (2006.01) B21C 37/26 (2006.01)
Patent
CA 1041747
ABSTRACT A method and device for the cold rolling of narrow flat landings on the cylindrical surface of heat exchanger tubing, just prior to the winding onto the tubing of one or more metal strips for the production of finned tubing, the device having pressure rollers on pressure levers carried by a journalled supporting spindle which rotates with the tubing, and a control sleeve inside the hollow spindle which, under the action of a linear actuator, interrupts the rolling action as desired, while the winding operation continues.
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