Metal fusion bonding – Process – Plural joints
Patent
1993-07-19
1994-06-21
Heinrich, Samuel M.
Metal fusion bonding
Process
Plural joints
228223, 228232, B23K 3102
Patent
active
053222091
ABSTRACT:
The brazing process for an aluminum headered condenser is improved by adding a flux drying and preheating process that both dries the wet flux layer and prepares the part for more efficient brazing. An oven is divided into two directly connected zones, one that dries the flux layer at a lower temperature, and one that preheats the condenser at a higher temperature that is still too low to melt the flux layer. Both the tanks and the core of the condenser are heated hotter than they would be if they were only flux dried, although the core is heated significantly more. The preheated parts are then transported to the braze furnace indirectly, through ambient, which serves to cool the core more than the tanks, to a temperature lower than the tanks. Finally, the part is run through a normal braze cycle. Because the tanks begin hotter than normal, they reach braze melt temperature sooner than they normally would. Because the core starts out cooler than the tanks, they reach braze temperature closer in time to the tanks.
REFERENCES:
patent: 3853637 (1974-12-01), Grey et al.
patent: 4231508 (1980-11-01), Wagner
patent: 5062476 (1991-11-01), Ryan et al.
patent: 5172847 (1992-12-01), Barten et al.
Barten Brian L.
Halstead Gary A.
General Motors Corporation
Griffin Patrick M.
Heinrich Samuel M.
LandOfFree
Aluminum heat exchanger brazing method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Aluminum heat exchanger brazing method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aluminum heat exchanger brazing method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2216331