Process for the manufacture of heat-exchanger elements of strip-finned heat-exchangers

Patent · Tue Jul 22 04:00:00 EDT 1986

OSTI ID:5396394

Gal, P

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; EDB-86-151908; NOV-85-018345
• Patent Number(s): US 4601089
• OSTI ID: 5396394
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
ALUMINIUM
DEFORMATION
ELEMENTS
ENERGY TRANSFER
FABRICATION
FASTENING
FLUID MECHANICS
HEAT EXCHANGERS
HEAT TRANSFER
HOT WORKING
JOINING
MANUFACTURING
MATERIALS WORKING
MECHANICS
METALS
PRESSURE EFFECTS
ROLLING
WELDING