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4. 发明专利

JP5183084B2 Tubular product and its manufacturing method and apparatus 有权
公开(公告)号：JP5183084B2
公开(公告)日：2013-04-17
申请号：JP2007064854
申请日：2007-03-14
申请人：株式会社クニテック
发明人：幸孝國本 , 理也斎藤
IPC分类号： B21D51/26 , B21D22/30
CPC分类号： B21H7/187 , Y10T428/12382 , Y10T428/12389

7. 发明专利

JP5285236B2 Pipe bending apparatus 有权
公开(公告)号：JP5285236B2
公开(公告)日：2013-09-11
申请号：JP2007137958
申请日：2007-05-24
申请人：株式会社クニテック
发明人：幸孝國本 , 正次松尾 , 晃次須田
IPC分类号： B21D7/025 , B21D9/05
摘要： PROBLEM TO BE SOLVED: To provide a tube bending device capable of bending a tube with high accuracy. SOLUTION: The tube bending device includes: a rotary piece disposed at a specified position of a frame; a clamp device for holding a work on the rotary piece; a work pressing device for pressing the work in the tangential direction of the rotary piece; a mandrel moving device for moving the mandrel inserted in the work in the tangential direction of the rotary piece; and a controller for controlling the position of the mandrel. The rotary piece, the work pressing device, and the mandrel moving device are driven by independent driving devices respectively. Each of the driving devices for the rotary piece, the work pressing device, and the mandrel moving device is driven based on predetermined conditions. At least the bending end position of the mandrel is set at an arbitrary position. COPYRIGHT: (C)2009,JPO&INPIT

9. 发明专利

JP5291306B2 Different-diameter pipe fittings 有权
公开(公告)号：JP5291306B2
公开(公告)日：2013-09-18
申请号：JP2007185508
申请日：2007-07-17
申请人：株式会社クニテック
发明人：幸孝國本 , 正次松尾
IPC分类号： B21D51/16 , F16L25/00
摘要： PROBLEM TO BE SOLVED: To provide a different diameter pipe joint in which a weld zone is eliminated, and reliability to leakage is improved. SOLUTION: The different diameter pipe joint has a bent region and an expanded pipe region integrally formed from one pipe stock. The bent region has a first straight line part and a second straight line part connected at the bent part, the inner wall face of the first straight line part is formed as a first press-formed face at least in the vicinity the bent part, the inner wall face of the second straight line part is formed as a second press-formed face at least in the vicinity of the bent part, and the first press-formed face and the second press-formed face are directly connected at the inner circumferential side of the inner wall face of the bent part or are close each other. The expanded pipe region has: an almost cylindrical large-diameter part; an almost cylindrical small-diameter part; and a shift part shifted therebetween, and the sheet thickness of the shift part is larger than that of the large-diameter part and also larger than that of the small-diameter part. COPYRIGHT: (C)2009,JPO&INPIT

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