Process for the manufacture of heat-exchanger elements of strip-finned heat-exchangers
A process is described for making a heat exchanger of aluminum, which consists of: applying a pattern of stop weld material to a first plate element; superimposing a second element on the first plate element and hot-rolling the plate elements together to form a plate; expanding the sides of the plate that are protected by the stop weld material by the application of fluid pressure to form a plurality of tubular heat exchanger medium flow passages; securing a plurality of fins by directed weld, without the use of foreign materials, at only one of their ends to the plate; holding a plurality of the plates in a frame; and securing the other end of each fin to the other part of a plate by applying additional fluid pressure with the tubular passages of sufficient magnitude to cause permanent deformation and metal-to-metal cohesive bonding between the other end and the surface of the plate.
- Assignee:
- NOV; NOV-85-018345; EDB-86-151908
- Patent Number(s):
- US 4601089
- OSTI ID:
- 5396394
- Resource Relation:
- Patent File Date: Filed date 31 Dec 1984
- Country of Publication:
- United States
- Language:
- English
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