Title:
HEATING METHOD AND HEATING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/188536
Kind Code:
A1
Abstract:
A heating method according to the present invention is for quenching a coil spring, wherein: the method includes a securing step for securing one end of a coil spring to an outer circumferential surface of a first shaft member and securing the other end thereof to an outer circumferential surface of a second shaft member, a heating step for heating the coil spring by energizing the first and second shaft members, and a rotating step for respectively rotating the first and second shaft members in the state in which the first and second shaft members are energized; the respective rotating axes of the first and second shaft members are positioned in the same straight line that forms an angle of 0-30° with respect to the horizontal direction; and a center axis of the coil spring attached to the first and second shaft members is parallel to the aforementioned straight line.
Inventors:
TAKEDA KAZUYA (JP)
YASUDA HIROYUKI (JP)
TSUKADA KOUTA (JP)
YASUDA HIROYUKI (JP)
TSUKADA KOUTA (JP)
Application Number:
PCT/JP2022/043525
Publication Date:
October 05, 2023
Filing Date:
November 25, 2022
Export Citation:
Assignee:
NHK SPRING CO LTD (JP)
International Classes:
B21F35/00; C21D9/02; H05B3/00
Domestic Patent References:
| WO2012014672A1 | 2012-02-02 | |||
| WO2013099821A1 | 2013-07-04 |
Foreign References:
| JPS6130246A | 1986-02-12 | |||
| US20110031666A1 | 2011-02-10 | |||
| JP2011195919A | 2011-10-06 | |||
| US6235131B1 | 2001-05-22 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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