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Title:
RING-SHAPED SPRING AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2013/115266
Kind Code:
A1
Abstract:
Provided are: a low cost ring-shaped spring having high strength; and a method for manufacturing the ring-shaped spring. A ring-shaped spring is obtained by sequentially performing, for example, material preparation (Step S1), bending and forming (Step S2), welding (Step S3), and disc forming (Step S4). The ring-shaped spring is formed in an endless shape by welding the opposite ends of a material together and has: a weld metal section formed at the boundary between the opposite ends of the material; and a section thermally affected by the welding, the section being formed around the weld metal section and being heated by the welding. The tensile strength of the ring-shaped spring is 1000 MPa or higher. The ring-shaped spring has sufficient tensile strength when used, for example, as a disc spring and a wavy spring, and this eliminates the need for the ring-shaped spring to be subjected to quenching and tempering, reducing the manufacturing cost. Also, the dimensional accuracy of the product is increased because the deformation of the product due to the quenching and tempering is prevented.

Inventors:
TAKAMURA NORITOSHI (JP)
TAKAHASHI FUMIO (JP)
Application Number:
PCT/JP2013/052080
Publication Date:
August 08, 2013
Filing Date:
January 30, 2013
Export Citation:
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Assignee:
NHK SPRING CO LTD (JP)
International Classes:
F16F1/32; B21D11/10; B21D53/00; C22C38/00; C22C38/38; F16F1/02; C21D9/02
Foreign References:
JP2011021624A2011-02-03
JP2011149089A2011-08-04
DE202011002271U12011-04-28
JP2007198598A2007-08-09
JP2001225112A2001-08-21
JP2003329072A2003-11-19
JP2011052777A2011-03-17
JPH06106277A1994-04-19
JPH08135706A1996-05-31
JP2007186795A2007-07-26
JP2006183136A2006-07-13
JP2004009126A2004-01-15
JPH06106277A1994-04-19
JP2001225112A2001-08-21
Other References:
See also references of EP 2811198A4
Attorney, Agent or Firm:
SUENARI, Mikio (JP)
End 成 Mikio (JP)
Download PDF:
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Claims:



 
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