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51. 发明专利

JP2001280711A PIPE MATERIAL FOR ABSORBING GEOTHERMIC HEAT 失效
公开(公告)号：JP2001280711A
公开(公告)日：2001-10-10
申请号：JP2000093264
申请日：2000-03-30
申请人： KOBE STEEL LTD
发明人： KAITA KAZUHIRO , SASAKI NOBUYUKI
IPC分类号： F16L9/18 , F24F3/00 , F24J3/08 , F28F21/08
摘要： PROBLEM TO BE SOLVED: To solve the problem of a conventional synthetic resin pipe for absorbing geothermal heat that positioning, especially of a large diameter pipe, is difficult because the pipe itself deforms when it is buried and a jig for inserting a dedicated core in order to prevent significant variation in the cross-sectional profile of a hole under boring is required at the time of boring a hole for introducing outdoor air in the side face of the pipe or a dedicated jig for securing a large diameter pipe on a long table is required. SOLUTION: In case of a multilayer pipe, an outer tank located on the outermost side is made of an aluminum extrusion material. The pipe has a structure of single aluminum extrusion material and when the pipe has a large diameter, it is divided circumferentially into a plurality of parts which are jointed by means of a flange formed in the axial direction of the pipe. Furthermore, cross- section perpendicular to the axis in the pipe is divided into a plurality of parts by means of a baffle plate made of aluminum or synthetic resin. Supplied air is caused to flow up and down repeatedly in a direction parallel with the axis of the pipe while touching the outer tank.

52. 发明专利

JP2000140949A METHOD FOR BENDING ALUMINUM ALLOY SHAPE 失效
公开(公告)号：JP2000140949A
公开(公告)日：2000-05-23
申请号：JP32236398
申请日：1998-11-12
申请人： KOBE STEEL LTD
发明人： KAITA KAZUHIRO , YOSHIDA MASATOSHI
IPC分类号： B21D7/06
摘要： PROBLEM TO BE SOLVED: To highly precisely perform bending by which the deformation of a cross-section and spring back are made when applying stretch bending to an aluminum alloy shape. SOLUTION: When holding both ends of a shape 1 by a chuck 2 and applying tension to the shape 1, pushing out a die 5 forward, applying the stretch bending to the shape 1 along a die 5, and when expressing the tension by P (N), the stock yield strength of the shape by σ0.2 (N/cm2) and the cross-sectional area of the shape by A (mm2), the bending is performed under a condition, 0.7σ0.2×A

53. 发明专利

JPH1046279A ALUMINUM ALLOY EXTRUDED MATERIAL EXCELLENT IN BENDABILITY AND ITS PRODUCTION 失效
公开(公告)号：JPH1046279A
公开(公告)日：1998-02-17
申请号：JP22059696
申请日：1996-08-02
申请人： KOBE STEEL LTD
发明人： OKA TAKASHI , KAITA KAZUHIRO , HIRANO MASAKAZU
IPC分类号： C22F1/05 , C22C21/02 , C22C21/06
摘要： PROBLEM TO BE SOLVED: To produce an aluminum alloy extruded material excellent in bendability and furthermore high in strength. SOLUTION: This aluminum alloy extruded material is produced in such a manner that, in press quenching at the time of extruding an aluminum alloy contg., by weight, 0.3 to 0.55% Mg, 0.3 to 0.8% Si, 0.1 to 0.5% Cu and 0.005 to 0.2% Ti, furthermore contg. at least one or more kinds among Mn, Cr and Zr by 0.05 to 0.6%, and the balance Al with inevitable impurities, the conditions of >=150 deg.C/min average cooling rate at 500 to 200 deg.C and

54. 发明专利

JPH09316583A ALUMINUM ALLOY MATERIAL EXCELLENT IN BULGE FORMABILITY, AND ITS PRODUCTION 失效
公开(公告)号：JPH09316583A
公开(公告)日：1997-12-09
申请号：JP15750496
申请日：1996-05-28
申请人： KOBE STEEL LTD
发明人： KAITA KAZUHIRO , OKA TAKASHI
IPC分类号： C22F1/05 , C22C21/02 , C22C21/06
摘要： PROBLEM TO BE SOLVED: To provide an aluminum alloy material, excellent in bulge formability and suitable for use in forming of frame, joining member, etc., for automobile, rolling stock, or building member, and its production. SOLUTION: This alloy is an aluminum alloy having a composition consisting of, by weight, 0.9-1.4% Si, 0.4-0.8% Mg, 0.1-0.6% Cu, either or both of 0.001-0.05% Ti and 0.0002-0.01% B, and the balance Al with inevitable impurities. In this alloy, the ratio between proof stress and tensile strength and the difference between tensile strength and proof stress are regulated to =110N/mm , respectively. The aluminum alloy material can be produced by subjecting this aluminum alloy to extrusion, to heating to 470-550 deg.C in the final heat treatment stage, and to cooling down to 200 deg.C at >=100 deg.C/min average cooling rate.

55. 发明专利

JPH09155478A METHOD FOR JOINING HOLLOW MEMBER AND HOLLOW STRUCTURAL MEMBER 失效
公开(公告)号：JPH09155478A
公开(公告)日：1997-06-17
申请号：JP27544696
申请日：1996-09-25
申请人： KOBE STEEL LTD
发明人： KAITA KAZUHIRO , OKA TAKASHI
IPC分类号： B21D26/033 , B21D26/041 , B21D26/043 , B21D26/051 , B21D39/04 , B21D26/02
摘要： PROBLEM TO BE SOLVED: To provide a method for joining a hollow member free from a deterioration in strength with joining and with the high reliability of a joined part. SOLUTION: Pipes 1 and 2 to be joined are overlaid, they are set in split dies 3 and 4, and are upset in arrow directions by mandrels 5 and 6. And also, bulging forming is performed by applying an internal pressure to the pipes, and one swelling part or more are formed on the wall part of an overlaid part. When applying previously an adhesive in which an adhesive or hard grains are mixed on a part to be overlaid, higher joint efficiency can be attained. When using a member attained in this way as a structural member (joint) for the body frame or the door frame, etc., of a vehicle, welding at a place where stress is easily concentrated, such as a corner part, the vicinity of the corner part, etc., can be avoided, and weldability is improved as well.

56. 发明专利

JPH09109920A ENERGY ABSORBING MEMBER 失效
公开(公告)号：JPH09109920A
公开(公告)日：1997-04-28
申请号：JP29481595
申请日：1995-10-17
申请人： KOBE STEEL LTD
发明人： KAITA KAZUHIRO , OKA TAKASHI
IPC分类号： E04H9/02 , B62D21/15 , B62D25/20 , F16F7/12
摘要： PROBLEM TO BE SOLVED: To provide an energy absorbing member which improves the average load relatively without reducing the initial load, and thereby, has a large energy absorbing amount per unit weight. SOLUTION: This energy absorbing member consists of an extruded section of aluminum or an aluminum alloy, and a torsion is formed in the longitudinal direction. The angle θ of the torsion is about 2 to 60 deg. per the length 250mm, and the torsion is formed along the whole length of the member, or along the scope of 1/5 or more of the length L1. The torsion can be formed in the extruding process time, or by a bending process forcibly.

57. 发明专利

JPH0852517A METHOD FOR BENDING ALUMINUM OR ALUMINUM ALLOY EXTRUDED SHAPE AND DEVICE THEREFOR 失效
公开(公告)号：JPH0852517A
公开(公告)日：1996-02-27
申请号：JP18761794
申请日：1994-08-09
申请人： KOBE STEEL LTD
发明人： KAITA KAZUHIRO , OKA TAKASHI , HIRANO MASAKAZU
IPC分类号： B21C23/14 , B21D7/06 , B21D43/00
摘要： PURPOSE:To execute bending without generating the inconvenience such as buckling even when an Al or Al alloy extruded shape is bent, especially, working conditions are severe and the shape is worked into a complicated shape. CONSTITUTION:During the Al or Al alloy extruded shape 3 is passed through the inside of a fixed jig 1 and movable jig 2 which is arbitrarily moved, the bending of the extruded shape 3 is executed with the movable jig 1 and fixed jig 2. Rollers 4, 8 are respectively arranged in the insides of the fixed jig 1 and movable jig 2 and belts 9, 10 are attached on the rollers 4, 8. In this way, the restrained part of the extruded shape in the insides of the movable jig 2 and fixed jig 1 is made into narrow pitch than the buckling distance of the extruded shape, so the buckling of the extruded shape 3 during bending is prevented from being generated.

58. 发明专利

JPH07227618A AL ALLOY EXTRUDATE HAVING EXCELLENT BENDING WORKABILITY 失效
公开(公告)号：JPH07227618A
公开(公告)日：1995-08-29
申请号：JP4636794
申请日：1994-02-21
申请人： KOBE STEEL LTD
发明人： KAITA KAZUHIRO , OKA TAKASHI , HIRANO MASAKAZU
IPC分类号： B21C37/15
摘要： PURPOSE:To provide an Al alloy extrudate having excellent bending workability in the case bending and more particularly working of the Al alloy extrudate having a hollow sectional shape is severe and in the case the extrudate is worked to intricate shapes. CONSTITUTION:This Al alloy extrudate hating the excellent workability is formed by providing the Al alloy extrudate formed to the hollow sectional shape by welding and joining of plural pieces of members with welded parts in positions exclusive of corner part. The Al alloy extrudate formed to the hollow sectional shape having middle ribs is provided with the welded parts in the positions exclusive of the corner parts and the positions exclusive of the intersected parts of the middle ribs and a flange or web. An effect is higher if the welding area is increased by forming the welded parts in a direction where the groove joint direction of the welded parts is not parallel with the thickness direction of the members to be welded. The Al alloy extrudate is particularly effective for the intricate shapes where bending of automotive parts and building members is difficult.

59. 发明专利

JPH0770688A HIGH STRENGTH ALUMINUM ALLOY EXTRUDED MATERIAL AND ITS PRODUCTION 失效
公开(公告)号：JPH0770688A
公开(公告)日：1995-03-14
申请号：JP21613393
申请日：1993-08-31
申请人： KOBE STEEL LTD
发明人： KAITA KAZUHIRO , HIRANO MASAKAZU , OKA TAKASHI
IPC分类号： B21C23/00 , B60R19/03 , B60R19/18 , C22C21/10 , C22F1/00 , C22F1/053
摘要： PURPOSE:To obtain a high strength Al alloy extruded material excellent in bendability and stress corrosion cracking resistance by specifying the compsn. constituted of Zn, Mg, Cu, Zr, Ti, br, Mn and Al, the layer thickness of a surface recrystallized layer and the grain size. CONSTITUTION:An Al alloy material essentially consisting of, by weight, 5.0 to 7.0% Zn, 1.0 to 1.5% Mg, 0.1 to 0.3% Cu, 0.05 to 0.2% Zr, 0.001 to 0.05% Ti and 0.03 t 0.2% Cr, furthermore contg. =200 deg.C/min average cooling rate. After that, the molded body is subjected to artificial aging treatment. Thus, the high strength Al allay extruded material in which the thickness of the surface rectystallized layer is regulated to

60. 发明专利

JPH0625783A ALUMINUM ALLOY EXTRUDED MATERIAL EXCELLENT IN BENDABILITY AND IMPACT ABSORPTION AND ITS MANUFACTURE 失效
公开(公告)号：JPH0625783A
公开(公告)日：1994-02-01
申请号：JP20054592
申请日：1992-07-03
申请人： KOBE STEEL LTD
发明人： KAITA KAZUHIRO , HIRANO MASAKAZU
IPC分类号： C22C21/02 , C22C21/10 , C22F1/00 , C22F1/05 , C22F1/053
摘要： PURPOSE:To obtain an aluminum alloy extruded material excellent in bend- workability and impact absorption and suitable for automotive parts such as side members and bumpers. CONSTITUTION:An aluminum alloy contg., by weight, 0.5 to 0.8% Mg, 0.7 to 1.5% Si, 0.4 to 0.6% Cu and 0.001 to 0.05% Ti, and the balance Al with inevitable impurities is heated to 500 to 540 deg.C, is thereafter extruded, is successively cooled at >=1000 deg.C/min average cooling rate and is thereafter subjected to artificial aging treatment. Then, the ratio of the major axis to the minor axis in the crystalline grains is regulated to

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