JOINING METHOD OF HEAT EXCHANGE TUBE AND HEADER PLATE IN HEAT EXCHANGER

摘要

PURPOSE:To join a heat exchanging tube and header plate extremely easily and inexpensively by performing a burring of the smaller hole than the cross section of the heat exchanging tube being made on a header plate and by reducing the hole with inserting the heat exchanging tube into this hole. CONSTITUTION:The hole 10 smaller than the cross section of a pipe 3 is made on a plate 2 in case of joining the heat exchanging tube 3 of a heat exchanger 1 and a header plate 2. A burring is then made around the hole 10 and the size of the hole 10 is made larger than the cross section of the pipe 3, also the flange 11 projecting upwards around the hole 10 is formed. A slope part 12 is simultaneously formed with bending the part around the flange 11 obliquely upward. The pipe 3 is then inserted into the plate 2, he slope part 12 is deformed with pressing downward by the press and with the close contact of the inner peripheral face of the flange 11 to the outer peripheral face of the pipe 3 the both are provisionally fixed. The both thereof are brazed simultaneously with other members.