Title:
MANUFACTURE OF HEAT EXCHANGER
Document Type and Number:
Japanese Patent JP2569452
Kind Code:
B2
Abstract:
PURPOSE: To prevent corrosion on the inner surface of a metallic tube by utilising pressure in company with heating gas instead of steam pressure for expanding the metallic tube.
CONSTITUTION: The required number of aluminum fins preliminarily formed with metal inserting holes 3 are laminated having adequate gaps between them. After the required number of metallic tubes 2 are inserted into the fins 1, a channel 5 for heating medium is formed by mutually joining the tubes 2 and both ends of the channel is tightly closed after filling a gas for expanding the tubes in the channel 5. Then, the assembled component is heated up to a prescribed temperature to expand the metallic tubes with the pressure of the filled gas 8. Thus, industrial production handling is facilitated and a heat exchanger is manufactured without generating corrosion on the inner surface of the metallic tubes 2.
Inventors:
Tatsumi Aritaka
Application Number:
JP15527392A
Publication Date:
January 08, 1997
Filing Date:
June 15, 1992
Export Citation:
Assignee:
Hitachi Cable Ltd.
International Classes:
B21D26/033; B21D26/041; B21D39/00; B21D39/08; B21D53/08; B23K1/00; B23K101/14; (IPC1-7): B21D53/08; B21D26/02; B21D39/00; B21D39/08; B23K1/00
Domestic Patent References:
| JP4220130A | ||||
| JP4253534A | ||||
| JP6310069A | ||||
| JP3238129A |
Attorney, Agent or Firm:
Toshiyuki Usuda