Title:
SPRING PRODUCTION METHOD AND SPRING
Document Type and Number:
WIPO Patent Application WO/2013/099821
Kind Code:
A1
Abstract:
This production method for springs has: a first step in which a first electrode is brought in contact with a first position on a spring material, and a second electrode is brought in contact with a second position separated from the first position in the axial direction of the spring material; a second step in which, after the first step, the spring material is heated by causing a current to flow to the spring material via the first electrode and the second electrode; a third step in which, after the second step, the first and second electrodes and the spring material are put in a non-contact state; and a fourth step in which, after the third step, at least the sites on the spring material that had come in contact with the first and second electrodes are heated by a different heating method from the heating method used in the second step.
Inventors:
HIRATA YUICHI (JP)
SUZUKI HIDEKAZU (JP)
ITO TORU (JP)
SUZUKI HIDEKAZU (JP)
ITO TORU (JP)
Application Number:
PCT/JP2012/083345
Publication Date:
July 04, 2013
Filing Date:
December 21, 2012
Export Citation:
Assignee:
CHUO HATSUJO KK (JP)
International Classes:
C21D9/02; C21D1/40; C21D7/06; F16F1/06
Domestic Patent References:
WO2012014672A1 | 2012-02-02 |
Foreign References:
JP2011195919A | 2011-10-06 | |||
JPH01191745A | 1989-08-01 | |||
JPH01184234A | 1989-07-21 |
Attorney, Agent or Firm:
KAI-U PATENT LAW FIRM (JP)
Patent business corporation KAI-U Patent Law Firm (JP)
Patent business corporation KAI-U Patent Law Firm (JP)
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Claims: