Title:
ATMOSPHERE FURNACE AND METHOD FOR HEATING THE SAME
Document Type and Number:
Japanese Patent JP3956830
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an atmosphere furnace which can preheat a workpiece to be brazed at a high speed, can prevent deterioration of a flux and can suppress growth of an oxidized film even if the atmosphere of a preheating chamber is not an oxygen-free atmosphere.
SOLUTION: The workpiece 11 conveyed in the preheating chamber 1 is rapidly heated nearly up to about 450°C by combustion gas of a closed loop circulating through the preheating chamber within about 5 minutes regulated from the degree of deterioration of the flux in the atmospheric air and the degree of growth of the oxidized film prior to brazing in the atmosphere furnace. The closed loop is provided with a gas burner 71 and a circulation fan 6. An amount of combustion of the gas burner and an amount of circulation of the combustion gas by the circulation fan are controlled in accordance with the temperature in the chamber by a temperature sensor 9 in the preheating chamber.
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Inventors:
Takenori Takanori
Application Number:
JP2002311204A
Publication Date:
August 08, 2007
Filing Date:
October 25, 2002
Export Citation:
Assignee:
株式会社デンソー
International Classes:
B23K1/008; B23K31/02; F27B9/02; F27B9/04; F27B9/10; F27B9/12; F27B9/20; F27B9/24; F27B9/36; F27D17/00; F27D19/00; F27D21/00; H05B3/00; (IPC1-7): B23K1/008; B23K31/02; F27B9/12
Domestic Patent References:
| JP7195169A | ||||
| JP5161962A | ||||
| JP6142901A | ||||
| JP56035715A | ||||
| JP62170174U | ||||
| JP11197826A | ||||
| JP5017492U |
Attorney, Agent or Firm:
Takashi Ishida
Jun Tsuruta
Shinozaki Masami
Masaya Nishiyama
Jun Tsuruta
Shinozaki Masami
Masaya Nishiyama