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公开(公告)号：EP3028797A4
公开(公告)日：2016-07-20
申请号：EP13890456
申请日：2013-12-27
申请人： NODA KANAGATA CO LTD
发明人： HORIGUCHI NOBUO
CPC分类号： B23C5/1027 , B23B5/365 , B23C3/16 , B23C2220/04 , B23C2220/68 , Y10T409/303752 , Y10T409/304368 , Y10T409/304424
摘要： Provided is a method of manufacturing an elbow, including: a first cutting step of cutting a material by relatively moving a cutting section of a cutting tool, which is formed of at least a part of a substantially spherical shape, along an inner side surface of the elbow to be finished in a direction from a first end surface to a second end surface of the material; and a second cutting step of cutting the material by relatively moving the cutting section along the inner side surface of the elbow to be finished in a direction from the second end surface to the first end surface of the material.
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公开(公告)号：EP2586551A4
公开(公告)日：2015-07-22
申请号：EP10854058
申请日：2010-06-28
发明人： HORIGUCHI NOBUO
CPC分类号： B23C3/16 , B23C5/08 , B23C5/109 , B23C2220/04 , B23C2220/52 , B23C2222/84 , B23C2222/88 , B23C2265/40 , F16L43/001 , Y10T409/303808
摘要： A hole is formed in an elbow through the steps of: forming a starting hole in a material, the starting hole having an undercut remaining on a hole surface; finishing an inner diameter of the starting hole (11 -3 ) on one end side by revolving a side cutter (II) including an arc-shaped cutting edge and having an outer diameter smaller than a finishing hole diameter while rotating the side cutter (II) in such a posture that the side cutter (II) is inclined in a predetermined direction relative to the material (12), the revolving being carried out so that the side cutter moves along a hole surface to be finished; and finishing the inner diameter of the starting hole (11 -3 ) on another end side by revolving the side cutter (II) while rotating the side cutter (II).
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