Inner ribbed tube and method

Details Inner ribbed tube and method Inner ribbed tube and method

1991-10-24

1993-06-15

Flanigan, Allen J.

Metal working

Method of mechanical manufacture

Heat exchanger or boiler making

29890053, 165184, B21C 3708

Patent

active

052193748

ABSTRACT:
A heat exchanger inner spiral ribbed tube and method of manufacture therefor for use in making a refrigerator condenser or a refrigerator evaporator. The tube has an annular wall having an inner surface. The inner surface has a plurality of inner spiral ribs, each having a spiral angle. The spiral angle is between 0 degrees and 90 degrees; and is 45 degrees in the described embodiment. The tube making method includes the steps of swaging a plain plate between a plain roller and a grooved roller to make a ribbed plate; then forming seam welding the plate at the longitudinal adjacent edges thereof to make the inner spiral ribbed tube.

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