公开(公告)号：EP1442805B1

公开(公告)日：2006-12-06

申请号：EP04010163.6

申请日：2001-06-08

Applicant: NHK SPRING CO., LTD.

Inventor： Okada, Hideki ,  Furuyama, Tsutomu

IPC: B21D15/10

CPC classification number: B21D15/10 ,  Y10T29/49877

公开(公告)号：EP1442805A1

公开(公告)日：2004-08-04

申请号：EP04010163.6

申请日：2001-06-08

Applicant: NHK SPRING CO., LTD.

Inventor： Okada, Hideki ,  Furuyama, Tsutomu

IPC: B21D15/10

CPC classification number: B21D15/10 ,  Y10T29/49877

Abstract: A manufacturing method for manufacturing a bellows having pleat walls (4, 5) with S-shaped profiles comprises a primary forming process for forming a formed bellows, a pressing process for compressing the formed bellows in the axial direction, and a stretching process for pulling the compressed bellows in the axial direction, thereby obtaining desired pitches and free length. After the stretching process is carried out, the bellows is subjected to an annealing and ageing heat-treatment process. An apparatus for manufacturing the bellows (1) comprises a pair of molds (13, 14) that have their respective forming surfaces (36, 37) in shapes corresponding individually to the pleat walls (4, 5). The die (14) is slightly retreated away from the pleat walls (4, 5) just before the dies (13, 14) open in the diametrical direction after the pleat walls (4, 5) are formed.

公开(公告)号：EP1166912B1

公开(公告)日：2004-11-03

申请号：EP01305001.8

申请日：2001-06-08

Applicant: NHK SPRING CO., LTD.

Inventor： Okada, Hideki ,  Furuyama, Tsutomu

IPC: B21D15/10

CPC classification number: B21D15/10 ,  Y10T29/49877

公开(公告)号：EP1166912A2

公开(公告)日：2002-01-02

申请号：EP01305001.8

申请日：2001-06-08

Applicant: NHK SPRING CO., LTD.

Inventor： Okada, Hideki ,  Furuyama, Tsutomu

IPC: B21D15/10

CPC classification number: B21D15/10 ,  Y10T29/49877

Abstract: A manufacturing method for manufacturing a bellows having pleat walls (4, 5) with S-shaped profiles comprises a primary forming process for forming a formed bellows, a pressing process for compressing the formed bellows in the axial direction, and a stretching process for pulling the compressed bellows in the axial direction, thereby obtaining desired pitches and free length. After the stretching process is carried out, the bellows is subjected to an annealing and ageing heat-treatment process. An apparatus for manufacturing the bellows (1) comprises a pair of molds (13, 14) that have their respective forming surfaces (36, 37) in shapes corresponding individually to the pleat walls (4, 5). The die (14) is slightly retreated away from the pleat walls (4, 5) just before the dies (13, 14) open in the diametrical direction after the pleat walls (4, 5) are formed.

Abstract translation: 用于制造具有S形轮廓的褶皱壁（4,5）的波纹管的制造方法包括用于形成成形波纹管的初级成形工艺，用于沿轴向压缩所形成的波纹管的压制方法和拉伸拉伸工艺 压缩的波纹管沿轴向方向，从而获得期望的间距和自由长度。 在进行拉伸处理之后，对波纹管进行退火和时效热处理。 用于制造波纹管（1）的装置包括一对模具（13,14），其具有各自形成为与褶皱壁（4,5）相对应的形状的形状表面（36,37）。 在形成褶皱壁（4,5）之后，正好在模具（13,14）沿直径方向打开之前，模具（14）稍稍从褶皱壁（4,5）退回。

公开(公告)号：EP1529993B1

公开(公告)日：2007-03-14

申请号：EP04026284.2

申请日：2004-11-05

Applicant: NHK SPRING CO., LTD.

Inventor： Okada, Hideki

IPC: F16J3/04 ,  C21D9/08 ,  F15B1/04

CPC classification number: C21D8/105 ,  C21D6/002 ,  C21D6/02 ,  C21D7/06 ,  F15B1/103 ,  F15B2201/205 ,  F15B2201/3153 ,  F15B2201/413 ,  F15B2201/415 ,  F15B2201/61 ,  F16J3/047

公开(公告)号：EP1529993A1

公开(公告)日：2005-05-11

申请号：EP04026284.2

申请日：2004-11-05

Applicant: NHK Spring Co., Ltd.

Inventor： Okada, Hideki

IPC: F16J3/04 ,  C21D9/08 ,  F15B1/04

CPC classification number: C21D8/105 ,  C21D6/002 ,  C21D6/02 ,  C21D7/06 ,  F15B1/103 ,  F15B2201/205 ,  F15B2201/3153 ,  F15B2201/413 ,  F15B2201/415 ,  F15B2201/61 ,  F16J3/047

Abstract: A metallic bellows, composed of precipitation hardening stainless steel, includes ridge portions and valley portions formed alternately and continuously, an average grain size of 10 to 15 µm, and compressive residual stress of not less than 500 MPa provided to at least surfaces of the ridge portions and the valleys by surface working.

Abstract translation: 金属波纹管，硬化不锈钢沉淀的组成，包括交替地且连续地形成脊部和谷部，在10〜15微米的平均晶粒尺寸，以及不小于500MPa在的至少表面提供给压缩残余应力 脊部和由表面加工的谷。

公开(公告)号：EP1166912A3

公开(公告)日：2003-01-22

申请号：EP01305001.8

申请日：2001-06-08

Applicant: NHK SPRING CO., LTD.

Inventor： Okada, Hideki ,  Furuyama, Tsutomu

IPC: B21D15/10

CPC classification number: B21D15/10 ,  Y10T29/49877

Abstract: A manufacturing method for manufacturing a bellows having pleat walls (4, 5) with S-shaped profiles comprises a primary forming process for forming a formed bellows, a pressing process for compressing the formed bellows in the axial direction, and a stretching process for pulling the compressed bellows in the axial direction, thereby obtaining desired pitches and free length. After the stretching process is carried out, the bellows is subjected to an annealing and ageing heat-treatment process. An apparatus for manufacturing the bellows (1) comprises a pair of molds (13, 14) that have their respective forming surfaces (36, 37) in shapes corresponding individually to the pleat walls (4, 5). The die (14) is slightly retreated away from the pleat walls (4, 5) just before the dies (13, 14) open in the diametrical direction after the pleat walls (4, 5) are formed.

Abstract translation: 用于制造具有S形轮廓的褶皱壁（4,5）的波纹管的制造方法包括用于形成成形波纹管的初级成形工艺，用于沿轴向压缩所形成的波纹管的压制方法和拉伸拉伸工艺 压缩的波纹管沿轴向方向，从而获得期望的间距和自由长度。 在进行拉伸处理之后，对波纹管进行退火和时效热处理。 用于制造波纹管（1）的装置包括一对模具（13,14），其具有各自形成为与褶皱壁（4,5）相对应的形状的形状表面（36,37）。 在形成褶皱壁（4,5）之后，正好在模具（13,14）沿直径方向打开之前，模具（14）稍稍从褶皱壁（4,5）退回。