Apparatus and method for forming a heat exchanger inner fin havi

Details Apparatus and method for forming a heat exchanger inner fin havi Apparatus and method for forming a heat exchanger inner fin havi

1994-09-30

1996-02-20

Larson, Lowell A.

Metal deforming

By deflecting successively-presented portions of work during...

By use of deflector arranged to bend work transversely of...

72196, 723796, B21D 1304

Patent

active

054919975

ABSTRACT:
In a heat exchanger, an inner fin is formed from a thin plate of aluminum alloy having a corrugated cross-section in a widthwise direction. The inner fin includes multiple crest surfaces extending parallel to one another in a lengthwise direction and multiple trough surfaces extending parallel to one another in the lengthwise direction. The crest surfaces and the trough surfaces are connected together by inclined surfaces. The crest surfaces have concavities which are shifted relative to one other in the lengthwise direction of the fin so that the concavities formed in adjacent crest surfaces are not aligned with one another in the widthwise direction. The inner fin inserted into the tube partitions the passages which communicate with each other through the concavities.

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