Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Patent
1990-05-04
1991-11-26
Cuda, Irene
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
29512, 29890052, 228183, B21D 5306
Patent
active
050672355
ABSTRACT:
In a method for joining a plurality of heat exchanger flat tubes with headers of a heat exchanger: each of the opposite end portions of the flat tubes has a cross section provided with a major axis and a minor axis; opposite major axis side walls of the cross section of each of opposite end portions of each of the flat tubes are obliquely cut off so as to form each of opposite minor axis side walls of the cross section of the end portion of the flat tube into a trapezoidal shape; the end portion of the flat tube is passed through an elliptical hole formed in the header; the end portion of the flat tubes thus passed through the header is flared over its entire peripheral wall; the thus flared end portion of the flat tube is then bent so as to be formed into a bent portion of the flat tube, which bent portion constitutes an essential part of a joint formed between the flat tube and the header; and the thus formed joint is dipped into a molten filler metal bath to form brazed or soldered portions around the joint.
REFERENCES:
patent: 3708012 (1973-01-01), Zimprich
patent: 3940837 (1976-03-01), Wiese
patent: 4150556 (1979-04-01), Melnyk
patent: 4234041 (1980-11-01), Melnyk
patent: 4272006 (1981-06-01), Kao
patent: 4500030 (1985-02-01), Gerber et al.
patent: 4730669 (1988-03-01), Beasley et al.
patent: 4744505 (1988-05-01), Calleson
patent: 4813112 (1989-03-01), Pilliez
Kato Hisataka
Takahashi Satoshi
Cuda Irene
Toyo Radiator Co., Ltd.
LandOfFree
Method for joining heat exchanger tubes with headers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for joining heat exchanger tubes with headers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for joining heat exchanger tubes with headers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2380873