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公开(公告)号：US08607604B2
公开(公告)日：2013-12-17
申请号：US13178928
申请日：2011-07-08
申请人： Norikazu Tezuka , Kazuharu Hirokawa , Keisuke Ihara , Kei Osawa , Hiroshi Ishikawa , Taiji Torigoe , Ryuichi Yamamoto , Yukihiro Hashimoto , Nobuyuki Izutsu , Koji Takahashi
发明人： Norikazu Tezuka , Kazuharu Hirokawa , Keisuke Ihara , Kei Osawa , Hiroshi Ishikawa , Taiji Torigoe , Ryuichi Yamamoto , Yukihiro Hashimoto , Nobuyuki Izutsu , Koji Takahashi
IPC分类号： C21D7/06
CPC分类号： B24C1/10 , B23G9/001 , B23P9/04 , B23P15/00 , C21D9/0093 , F01D5/066 , F05D2230/311 , F05D2230/90 , F05D2260/941 , F05D2300/211 , F05D2300/2112 , F05D2300/2261 , F16B33/06 , Y10T29/479
摘要： A bolt has a male screw with a surface hardening portion that has an increased surface hardness and that is applied with a compressive residual stress. The male screw is formed by cutting the bolt, and performing a process to provide at least on the surface of the male screw of the bolt the surface hardening portion that has increased hardness and that is applied with a compressive residual stress. As a result, the fatigue resistance of the male screw is improved and the bolt is effective for use in a portion where the male screw is subject to a repetitive stress.
摘要翻译： 螺栓具有具有表面硬化部分的外螺纹，其具有增加的表面硬度并且施加有压缩残余应力。 通过切割螺栓形成外螺纹，并且执行至少在螺栓的外螺纹的表面上提供具有增加的硬度并施加有压缩残余应力的表面硬化部的工艺。 结果，提高了外螺纹的耐疲劳性，并且螺栓对于使用阳螺纹受到重复应力的部分是有效的。
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公开(公告)号：US20110268533A1
公开(公告)日：2011-11-03
申请号：US13178928
申请日：2011-07-08
申请人： Norikazu TEZUKA , Kazuharu Hirokawa , Keisuke Ihara , Kei Osawa , Hiroshi Ishikawa , Taiji Torigoe , Ryuichi Yamamoto , Yukihiro Hashimoto , Nobuyuki Izutsu , Koji Takahashi
发明人： Norikazu TEZUKA , Kazuharu Hirokawa , Keisuke Ihara , Kei Osawa , Hiroshi Ishikawa , Taiji Torigoe , Ryuichi Yamamoto , Yukihiro Hashimoto , Nobuyuki Izutsu , Koji Takahashi
CPC分类号： B24C1/10 , B23G9/001 , B23P9/04 , B23P15/00 , C21D9/0093 , F01D5/066 , F05D2230/311 , F05D2230/90 , F05D2260/941 , F05D2300/211 , F05D2300/2112 , F05D2300/2261 , F16B33/06 , Y10T29/479
摘要： A bolt has a male screw with a surface hardening portion that has an increased surface hardness and that is applied with a compressive residual stress. The male screw is formed by cutting the bolt, and performing a process to provide at least on the surface of the male screw of the bolt the surface hardening portion that has increased hardness and that is applied with a compressive residual stress. As a result, the fatigue resistance of the male screw is improved and the bolt is effective for use in a portion where the male screw is subject to a repetitive stress.
摘要翻译： 螺栓具有具有表面硬化部分的外螺纹，其具有增加的表面硬度并且施加有压缩残余应力。 通过切割螺栓形成外螺纹，并且执行至少在螺栓的外螺纹的表面上提供具有增加的硬度并施加有压缩残余应力的表面硬化部的工艺。 结果，提高了外螺纹的耐疲劳性，并且螺栓对于使用阳螺纹受到重复应力的部分是有效的。
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公开(公告)号：US20090003968A1
公开(公告)日：2009-01-01
申请号：US12087603
申请日：2007-01-25
申请人： Norikazu Tezuka , Kazuharu Hirokawa , Keisuke Ihara , Kei Osawa , Hiroshi Ishikawa , Taiji Torigoe , Ryuichi Yamamoto , Yukihiro Hashimoto , Nobuyuki Izutsu , Koji Takahashi
发明人： Norikazu Tezuka , Kazuharu Hirokawa , Keisuke Ihara , Kei Osawa , Hiroshi Ishikawa , Taiji Torigoe , Ryuichi Yamamoto , Yukihiro Hashimoto , Nobuyuki Izutsu , Koji Takahashi
CPC分类号： B24C1/10 , B23G9/001 , B23P9/04 , B23P15/00 , C21D9/0093 , F01D5/066 , F05D2230/311 , F05D2230/90 , F05D2260/941 , F05D2300/211 , F05D2300/2112 , F05D2300/2261 , F16B33/06 , Y10T29/479
摘要： The present invention provides a surface hardening portion 11 that has increased surface hardness and that is applied with a compressive residual stress, at least on the surface of a male screw 10 of a bolt 1. The present invention includes the steps of cutting to form the male screw 10 of the bolt 1, and processing to provide at least on the surface of the male screw 10 of the bolt 1 the surface hardening portion 11 that has increased hardness and that is applied with a compressive residual stress. As a result, the present invention can improve the fatigue resistance of the male screw 10 and the bolt is effective as a bolt to be used in a portion where the male screw 10 is subject to a repetitive stress.
摘要翻译： 本发明提供了至少在螺栓1的外螺纹10的表面上具有增加的表面硬度并施加压缩残余应力的表面硬化部分11.本发明包括以下步骤：切割以形成 螺栓1的外螺纹10，并且至少在螺栓1的外螺纹10的表面上提供具有增加的硬度并施加有压缩残余应力的表面硬化部11的处理。 结果，本发明可以提高外螺纹10的耐疲劳性，螺栓作为在阳螺纹10受到重复应力的部分使用的螺栓是有效的。
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