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51. 发明专利

JP2003277831A Method of producing high strength, high toughness bend pipe 有权
标题翻译：生产高强度，高韧性弯管的方法
公开(公告)号：JP2003277831A
公开(公告)日：2003-10-02
申请号：JP2002077690
申请日：2002-03-20
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： MATSUDA YOHEI , ISHIKAWA NOBUYUKI , KONDO JO
IPC分类号： B21D7/00 , B21D7/16 , C21D9/08 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method of producing a high frequency bend steel pipe having strength in an APIX 80 class and excellent toughness over the whole length.
SOLUTION: The steel pipe having a composition, by mass, 0.04 to 0.10% C, 0.01 to 0.5% Si, 0.5 to 2.5% Mn, 0.005 to 0.08% Nb and 0.005 to 0.05% Ti, and, if required, containing one or more kinds of metals selected from ≤0.5% Cu,
摘要翻译：要解决的问题：提供一种具有APIX80级强度并且在整个长度上具有优异韧性的高频弯管钢管的制造方法。解决方案：具有质量为0.04至0.10％，0.01至0.5％Si，0.5至2.5％Mn，0.005至0.08％Nb和0.005至0.05％Ti组成的钢管，如果需要，含有选自≤0.5％Cu，<0.4％Ni，≤0.5％Cr，≤0.5％Mo和0.01〜0.1％V的一种或多种金属，并且还满足Ceq - （= C + Mn / 6 +（Cu + Ni）/ 15 +（Cr + Mo + V）/ 5）：0.4〜0.5，并具有贝氏体组织作为原料管。钢管通过顺序的高频感应线圈从管边缘的一侧加热至900至1100℃。加热后，直管部分以≥5℃/秒的速度冷却，弯曲部分在加热后弯曲后以≥5℃/秒的速度冷却。之后，整个弯管在250〜650℃回火。版权所有（C）2004，JPO

52. 发明专利

JP3400767B2 失效
公开(公告)号：JP3400767B2
公开(公告)日：2003-04-28
申请号：JP2000051208
申请日：2000-02-28
IPC分类号： B21D7/16 , B21D7/025 , B21D7/14
摘要： The present invention is carried out to supply a small sized and lightweight steel pipe bending apparatus so as to bring to construction sites, so as to keep thinning a thickness of the pipe at lower level and so as to obtain the pipe with a desired bending radius. The following apparatus realizes above-mentioned objectives of the present invention. A pipe bending apparatus comprises; a heating means to heat a steel pipe circularly around an center axis of the pipe, a cooling means to cool the heated portion of the pipe circularly around the center axis of the pipe, a tensile force applying means to apply the tensile force on points of application which are located in the opposite directions from the circular heated portion, a variable controlling means to control the tensile force variably, a transfer means to transfer the heated portion and the steel pipe relatively to the heating means and the cooling means in the direction of the axis of the steel pipe and a controlling means to control a velocity of the transfer.

53. 发明专利

JP2002361329A APPARATUS AND METHOD FOR BENDING STEEL TUBE 失效
公开(公告)号：JP2002361329A
公开(公告)日：2002-12-17
申请号：JP2001166079
申请日：2001-06-01
申请人： OTAS CO
发明人： SATO TORU
IPC分类号： B21D7/16
摘要： PROBLEM TO BE SOLVED: To provide an apparatus and method for bending a steel tube capable of bending a piece of steel tube at a plurality of number of times with different bending directions when the piece of steel tube is bent at a plurality of number of times. SOLUTION: The apparatus for bending the steel tube is characterized in that the apparatus for bending the steel tube comprises a heating means to annularly heat the periphery of the steel tube, making its axial line as a center axis, a cooling means to annularly cool the annularly heated portion with the heating means, making the axial line of the steel tube as a center axis, a first tensile force imparting means to impart tensile force between force acting points at both sides by pinching the annularly heated portion set on a first eccentricity axial line of the steel tube, a transfer means to relatively transfer the steel tube, the heating means and the cooling means in the axial direction of the steel tube, a second tensile force imparting means to impart tensile force between force acting points at both sides by pinching the heating means, the cooling means and the annularly heated portion set on a second eccentricity axial line which differs from the first eccentricity axial line, and a transfer means to relatively transfer the steel tube, the heating means, and the cooling means in the axial direction of the steel tube.

54. 发明专利

JP2002178042A MANUFACTURING METHOD OF METAL BAR TO BE BENT 失效
公开(公告)号：JP2002178042A
公开(公告)日：2002-06-25
申请号：JP2000383822
申请日：2000-12-18
申请人： DAI ICHI HIGH FREQUENCY CO LTD
发明人： TAKAGISHI MASAAKI , HIRANO TAKAYUKI
IPC分类号： B21D7/08 , B21D7/00 , B21D7/16 , C21D1/42
摘要： PROBLEM TO BE SOLVED: To improve the yield of non-defective articles by enabling the bending without causing small cracks, of a metal bar such as a cast tube and a hot extruded tube in the surface of which small cracks tend to generate when it is bent. SOLUTION: In manufacturing a bent bar by allowing a metal bar to be subjected to the continuously moving type hot bending, the heat treatment for eliminating work hardening of a surface layer part on a bar stock before the bending, is applied, and then the heat-treated bar is subjected to the hot bending.

55. 发明专利

JP2000263144A HEATING AND COOLING DEVICE FOR BENDING METALLIC BAR STOCK 失效
公开(公告)号：JP2000263144A
公开(公告)日：2000-09-26
申请号：JP7481499
申请日：1999-03-19
申请人： DAI ICHI HIGH FREQUENCY CO LTD
发明人： HANAMOTO YUKIMITSU , KISHIHARA SHIGEKI , MAENOZONO TSUKASA
IPC分类号： B21D7/024 , B21D7/16 , C21D1/00 , C21D1/42 , H05B6/10
摘要： PROBLEM TO BE SOLVED: To provide a heating and cooling device for stably generating plastic deformation in a part whose thickness is increased on the inside of bending and enbling good bending work when a metallic tube is continuously hot bent. SOLUTION: The heating and cooling device is constituted so that a cooling device 16 for blowing a cooling medium 17 against the metallic tube is in an adjacent relation to a heating inductor 12 with which the small region in the axial direction of the metallic tube 11 is inductively heated and arranged so as to be movable with respect to the heating inductor 12, the cooling device 16 is connected to a following means which is moved following up the outside 11b on the outer side of bend of the metallic tube 11 so as to be integrally moved and the position of the cooling device 16 is shifted to the position where the outside of the metallic tube after bending deformation is satisfactorily cooled.

56. 发明专利

JP2000153311A METHOD FOR COMPRESSIVELY BENDING METAL BAR AND DEVICE THEREFOR 失效
公开(公告)号：JP2000153311A
公开(公告)日：2000-06-06
申请号：JP32898798
申请日：1998-11-19
申请人： DAI ICHI HIGH FREQUENCY CO LTD
发明人： WATANABE YASUO
IPC分类号： B21D7/16
摘要： PROBLEM TO BE SOLVED: To provide a method by which bending work is always stably executable at a desired compressibility even when the variation in heating temp. or the like is generated at the time of continuously executing compressive bending of a metal bar, for example, a metal tube. SOLUTION: In a bending method by which the metal tube 1 is advanced with the tail stock of a moving device 5 and bending-deformed by the rotation of a bending arm 15 while heating the narrow width part of the metal tube with a heating device 2, the moving speed VP of the tail stock 6 is detected, a rotating speed ω is controlled with a bending arm driving device 17 so that the moving speed VP and rotating speed ω of the bending arm 15 are maintained in a prescribed relation which is fixed with respect to a desired compressibility ρ. In this way, the bending work is continuously executed at the desired compressibility ρ.

57. 发明专利

JP3015805B2 失效
公开(公告)号：JP3015805B2
公开(公告)日：2000-03-06
申请号：JP33819995
申请日：1995-12-01
IPC分类号： H05B6/06 , B21D7/16

58. 发明专利

JP2000053496A METHOD AND DEVICE FOR BENDING Si-BASED MATERIAL, AND CORE WIRE MEMBER MADE OF Si-BASED MATERIAL 失效
公开(公告)号：JP2000053496A
公开(公告)日：2000-02-22
申请号：JP15369399
申请日：1999-06-01
申请人： KOMATSU MFG CO LTD
发明人： KURIYAMA KAZUYA , FURUKOSHI TAKAYUKI
IPC分类号： B21D7/16 , C30B29/06 , C30B33/02
摘要： PROBLEM TO BE SOLVED: To enable bending of an Si-based material and to remarkably improve the degree of freedom of working of the Si-based material by heating the Si- based material conventionally considered as a material that is very brittle and incapable of being bent, to a temp. equal to or higher than the brittleness- ductility transition temp. of the Si-based material and applying a bending moment to the heated part to effect slip deformation of the material and thereby to enable bending of the material, in this method. SOLUTION: An Si-based material has a brittleness-ductility transition temp. at which the state of the material is transited from a state where the material shows brittleness, to a state where the material shows ductility. At a temp. equal to or higher than this transition temp., an Si-based material is in a state where crystal slip is positively caused. Accordingly, when a bending moment is applied to a part heated to a temp. equal to or higher than the transition temp., of the Si-based material, crystal lattice interstitial slip or slip among crystal grains in the heated part is caused to deform the material.

59. 发明专利

JP2000015350A DEVICE FOR BENDING STEEL PIPE AND METHOD THEREFOR 失效
公开(公告)号：JP2000015350A
公开(公告)日：2000-01-18
申请号：JP18746898
申请日：1998-07-02
申请人： SATO TORU
发明人： SATO TORU
IPC分类号： H05B6/10 , B21D7/00 , B21D7/16
摘要： PROBLEM TO BE SOLVED: To suppress decrease of thickness owing to bending work of a steel pipe and at the same time to make the size of a device small. SOLUTION: This working device comprises a heating means 10 to heat annularly a steel pipe 1 retaining its axis line as a center axis, a cooling means to cool annularly the annular heating part by the heating means 10 retaining the axis line of the steel pipe 1 as a center axis, a tensile force giving means 25 to give a tensile force between force exerting points holding the annular heating part from both sides which is set on an eccentric axis line of the steel pipe 1, and a driving means to execute relative shifting of the steel pipe 1, the heating means 10, and the cooling means in the direction of the axis line of the steel pipe.

60. 发明专利

JPH11300443A BENDING METHOD OF HARD-TO-WORK METALLIC WIRE AND METHOD OF FORMING ITS COIL PART 失效
公开(公告)号：JPH11300443A
公开(公告)日：1999-11-02
申请号：JP10970498
申请日：1998-04-20
申请人： MASUNAGA GANKYO KK
发明人： MASUNAGA SATORU , MURATA KAZUO
IPC分类号： B21D9/16 , B21D7/16 , B21F3/00 , B21F3/04 , B60J3/02 , H04Q7/32
摘要： PROBLEM TO BE SOLVED: To enable bending in a complicated shape by placing a hard-to-work metallic wire on an electrically conductive support member that consists of a rod material with a circular cross section, bringing a conductive pressurizing member into contact with the rod, energizing while a specific pressure is applied to it, and relatively moving it in the axial direction while rotating at a prescribed speed. SOLUTION: A guide rod sliding device is operated, with a workpiece W bent at right angles at a first bending position, while a forked part at the tip end of the guide rod is engaged with a pair of engaging grooves of a chuck piece. A second conductive pressurizing member is lowered by operating an air cylinder device, abutted on a second bending position of the workpiece W, and energized while a specific pressure is applied to the member. Simultaneously, a lead screw 325 is rotated by operating a motor 314. The second conductive member and the guide rod move relatively in the bending direction of the workpiece W, with the heating position successively moved to the unheated part of the workpiece W, and with the forming of a coil part continuously carried out.

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