Method of manufacturing heat exchanger tube and heat exchanger
AssigneesDenso Corporation, Sumitomo Light Metal Industries, Ltd.
InventorsHiroshi Nishikawa, Kenta Gotyo, Takashi Hattori, Masaki Kumagai, Yasunaga Itoh
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Abstract
The present invention provides a method of manufacturing a heat exchanger tube in which a tube for a heat exchanger formed by brazing is manufactured using a sheet material, wherein a filler metal melted during brazing can be prevented from entering an opening formed in an opposing portion or a parallel portion formed when bending a sheet material into a tube shape or an opening facing toward the outside of the tube. The opposing portion, the parallel portion, or the opening facing toward the outside of the tube is sealed. As the sealing means, friction welding is preferable.
Claims19
A method of manufacturing a tube for a heat exchanger formed by brazing, said method comprising:
- providing a sheet material of aluminum or aluminum alloy and having first and second end portions;
- bending the sheet material into a tube so that the first end portion thereof is disposed in one of:
- a) butting relationship with the second end portion of the sheet material to form an opening therebetween;
- b) overlapping relationship with the second end portion of the sheet material to form an opening therebetween;
- and c) overlapping relationship with a further portion of the sheet material other than the second end portion to form an opening therebetween;
- and
- sealing the opening in the tube by friction welding.
A method of manufacturing a tube for a heat exchanger formed by brazing, said method comprising:
- providing a sheet material of aluminum or aluminum alloy and having first and second end portions;
- bending the sheet material into a tube so that the first end portion thereof is disposed in one of:
- a) butting relationship with the second end portion of the sheet material to form an opening therebetween;
- b) overlapping relationship with the second end portion of the sheet material to form an opening therebetween;
- and c) overlapping relationship with a further portion of the sheet material other than the second end portion of the sheet material to form an opening therebetween;
- and
- sealing the opening in the tube by friction stir welding.
A method of manufacturing a tube for a heat exchanger formed by brazing, said method comprising:
- providing a metal sheet material having first and second end portions defining thereon respective terminal edges of the sheet;
- bending the sheet material into a tube so that the first and second end portions are disposed in opposed and spaced relationship with one another such that an opening is located between the first and second end portions;
- and
- sealing the opening in the tube by friction welding prior to a brazing operation performed during assembly of a heat exchanger into which the tube is incorporated.
Dependencies are inferred from the claim text.