Title:
HEADER FOR HEAT EXCHANGER, HEAT EXCHANGER PROVIDED WITH THE HEADER, AND MANUFACTURING METHOD OF THE HEADER
Document Type and Number:
Japanese Patent JP2015075260
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To manufacture a header for a heat exchanger at a low cost by simply, easily, and reliably inserting tubes into slit holes collectively without disposing an external member such as a positioning member onto the tubes.SOLUTION: A plurality of slit holes is formed in a direction at right angle to the longitudinal direction in a thick cylindrical pipe by perforating and slenderly opening a part of the cylindrical pipe, an opening surface part being formed by plastic-deforming the formed opening part toward the cylindrical pipe inner side. The slit hole is formed into such a shape that a curve surface formed toward the cylindrical pipe inner side on an opening inlet surface opposite to a width direction of the opening surface part, both wall surface parts opposed with a constant width, and a flare provided on both edge parts of the opening surface part and protruding toward the cylindrical pipe outer side corresponding to punch both edge shapes are formed.
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Inventors:
ISOMAE YASUHIRO
Application Number:
JP2013210191A
Publication Date:
April 20, 2015
Filing Date:
October 07, 2013
Export Citation:
Assignee:
SANWA SEIKI MFG CO LTD
International Classes:
F28F9/02; F28D1/053; F28F9/18
Attorney, Agent or Firm:
Yukihiko Takada