Title:
METHOD FOR MANUFACTURING HEAT EXCHANGER
Document Type and Number:
WIPO Patent Application WO/2020/261597
Kind Code:
A1
Abstract:
The present invention is characterized by including a main joining step in which one lap around the outer circumferential surface (11f) of an extruded porous tube (2) is completed at a prescribed depth along a set movement route (L1) that is set closer to the extruded porous tube (2) than to an abutting part (J1), to perform friction stirring around the abutting part (J1) while pouring in a second aluminum alloy into a gap, in a state in which only an agitation pin (F2) of a rotating tool (F) is inserted into a second outer circumferential surface (11f) of the extruded porous tube (2) and the outer circumferential surface of the agitation pin (F2) is lightly brought into contact with a stepped inclined surface (23b) of a lid (3). The present invention is also characterized by, in the main joining step, the agitation pin (F2) being gradually pushed in to the prescribed depth while a central axis of rotation (Z) of the rotating tool (F) is moved to a position that overlaps the set movement route (L1), after only the rotating agitation pin (F2) is inserted at a start position (SP1) set closer to the extruded porous tube (2) side than to the set movement route (L1).
Inventors:
HORI HISASHI (JP)
SEO NOBUSHIRO (JP)
SEO NOBUSHIRO (JP)
Application Number:
PCT/JP2019/045194
Publication Date:
December 30, 2020
Filing Date:
November 19, 2019
Export Citation:
Assignee:
NIPPON LIGHT METAL CO (JP)
International Classes:
B23K20/12; F28D1/053; F28F1/02; F28F21/08
Domestic Patent References:
| WO2014034590A1 | 2014-03-06 | |||
| WO2019082439A1 | 2019-05-02 |
Foreign References:
| JPH0566073A | 1993-03-19 |
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (JP)
Download PDF:
Previous Patent: DISCONNECTION DETECTION DEVICE AND DISCONNECTION DETECTION METHOD
Next Patent: METHOD FOR MANUFACTURING HEAT EXCHANGER
Next Patent: METHOD FOR MANUFACTURING HEAT EXCHANGER