Manufacturing method for a heat exchanger
AssigneeDenso Corporation
InventorsKatsuya Ishii, Hirokazu Hashimoto, Yuuichi Aoki, Kazuo Itoh
Life of this patent
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Abstract
In a heat exchanger, a core portion includes a plurality of plate fins each shaped like a flat plate and a plurality of tubes in which a fluid flows and each of which is inserted into each of the plate fins to be mechanically bonded thereto. Further, an end portion in a longitudinal direction of each of the tubes is bonded to a header plate which constructs a part of a header tank. The manufacturing method for this heat exchanger includes inserting the tube into the plate fins; expanding the tube to attach the plate fins; connect the tube into the header plate; and vibrate the tube with respect to the plate while applying a load to the tube in the direction of the header plate.
Claims9
A method for manufacturing a heat exchanger, the method comprising:
- inserting a tube in which a fluid flows into a plurality of plate fins each shaped like a flat plate;
- expanding the tube to mechanically connect the tube to the plate fins to form a core portion;
- and
- forming a tube hole portion in a header plate forming a part of a header tank, wherein the tube hole portion includes a first chamfered portion and a second chamfered portion;
- connecting an end portion of the tube in a longitudinal direction of the tube to the header plate so as to form an abutting portion, wherein the forming of the abutting portion includes:
- inserting the end portion of the tube into the tube hole portion, from a side of the first chamfered portion to a side of the second chamfered portion,
- bending an entire periphery of the inserted end portion of the tube to a flat surface of the header plate to form a flange portion, and
- abutting the flange portion to the flat surface of the header plate so as to form the abutting portion;
- and
- applying a predetermined load in a direction in which the flange portion abuts the header plate while vibrating the tube by supersonic vibration in a direction in which a surface of the abutting portion extends, wherein
- in the applying step, the tube is solid-boned to the header plate in a solid phase by deforming the tube and the header plate, such that a peak portion between the flat surface of the header plate and the second chamfered portion is crushed, and a material of the header plate near the tube hole portion flows to a space between the first chamfered portion and the tube.
Dependencies are inferred from the claim text.