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公开(公告)号:US5735156A
公开(公告)日:1998-04-07
申请号:US862296
申请日:1997-05-22
申请人: Yuji Yoshitomi , Shinji Tanaka , Shota Iwakura , Takeshi Araya , Takamitsu Nakazaki , Norio Yokoba , Toshimi Sato
发明人: Yuji Yoshitomi , Shinji Tanaka , Shota Iwakura , Takeshi Araya , Takamitsu Nakazaki , Norio Yokoba , Toshimi Sato
IPC分类号: F02C7/00 , B21C37/15 , B21D9/15 , B21D26/033 , B21D26/039 , B21D26/041 , B21D26/045 , B21D26/047 , B21D53/84 , B21D26/02
CPC分类号: B21D15/00 , B21D22/025 , B21D26/033 , Y10T29/49805
摘要: A method of forming a non-circular pipe having a different sectional shape in the longitudinal direction thereof by bending a raw pipe while applying pressure to the inside of the raw pipe, wherein the circumference of a section of the raw pipe is substantially equalized to the circumference of a section, corresponding to the section of the raw pipe, of the non-circular pipe after formed.
摘要翻译: 通过在对原料管的内部施加压力的同时弯曲原料管来形成其纵向具有不同截面形状的非圆形管的方法,其中原料管的一部分的周长基本上与 成形后的非圆形管道的截面对应于原料管段的周长。
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公开(公告)号:US4730474A
公开(公告)日:1988-03-15
申请号:US846144
申请日:1986-03-31
申请人: Shota Iwakura , Yuuji Yoshitomi , Takashi Naganawa , Toshio Saitoh , Tatsuo Seki
发明人: Shota Iwakura , Yuuji Yoshitomi , Takashi Naganawa , Toshio Saitoh , Tatsuo Seki
CPC分类号: B21D26/033 , B21C37/30 , Y10T29/49805
摘要: A method of relieving residual stress in a metal pipe comprises the steps of applying, by using a pressure medium, a low pressure to an interior of the metal pipe placed in dies, and applying, while preventing the buckling, an axial compression load to the pipe so as to effect a uniform plastic deformation of the entire metal pipe while maintaining the desired shape of the pipe, thereby relieving the residual stress in the metal pipe.
摘要翻译: 减轻金属管中的残余应力的方法包括以下步骤:通过使用压力介质将低压施加到放置在模具中的金属管的内部,并且在防止弯曲的同时施加轴向压缩载荷 以使整个金属管均匀地发生塑性变形,同时保持管的所需形状,从而减轻金属管中的残余应力。
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