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JP3869747B2 |
To provide a line pipe having a high deformability of X60 to 100 class in the API standards which also has low temperature toughness and high productivity, and to provide a steel sheet of the stock, and to provide a method of producing t...
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JP3861987B2 |
To provide a manufacturing method for a welded wide flange beam which prevents the welded wide flange beam from being twisted when a web coil and a pair of upper and lower flange coils are subjected to high frequency welding while constr...
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JP3855656B2 |
To provide a method for producing a stainless steel pipe for an exhaust gas pipe which has high temperature strength similar to that of 19Cr-2 Mo-Nb steel, further has better workability, and is more inexpensive than the conventional one...
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JP3854594B2 |
To provide a testing method and its jig capable of performing a tube expansion test on a large expansion quantity even for a thin thickness steel tube. The tube expansion testing jig is composed of an outer frame, whose inner lower part ...
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JP3852823B2 |
To provide an electromagnetic welding machine capable of mounting and taking out a weldment, and facilitating exchange of upper and lower platy coils to serve actual use. To a machine stand 1 fixed with the lower platy coil 2 insulated b...
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JP3852824B2 |
To provide a lamination-type electromagnetic welding method of sheet metals in which dissimilar metals of considerably different welding conditions or a metals difficult to weld can be welded, and the deformation of a work after the elec...
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JP2006289446A |
To provide a method for manufacturing an electric resistance welded steel tube, by which the quality of a welded part is stabilized.An SG rolls 4, which has a left and right bisected structure and can freely change a fin width, are provi...
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JP3836973B2 |
To provide a resistance welded steel pipe excellent in workability and suitable for automobile use or machine structural use. The resistance welded steel pipe excellent in workability has a composition consisting of, by weight, 0.05-0.25...
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JP2006272423A |
To provide a method of producing a high-frequency induction heating tube for a steel tube, a method in which a cooling efficiency of an impeder core is enhanced, while the inner face of a resistance welded tube near the welding point is ...
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JP3831130B2 |
To provide steel composed of specified components and to provide a method for producing a electric resistance welded tube obtained by specified high frequency electric resistance welding conditions and heat treating conditions for a tube...
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JP3827363B2 |
To optimize the heat input by automatically control the welding temperature of a joining part even when the tube manufacturing speed is changed or the steel grade is changed if the heat input is once set so that the welding temperature o...
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JP2006231344A |
To make an adjustment in pressing a roller to a bead possible separately for the upper and lower part, and to dispense with a support roll on a flange surface.A bead shaping device is disclosed in which a bead B generated in the upper an...
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JP3814919B2 |
To reduce the frequency to change a tip for a fin. A tip 19 of a tube brought in contact with the external circumference of a tube 15 transferred while rotating is attached fixedly to a shoe 18 for a tube on one side, a fin shoes 28 atta...
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JP3812998B2 |
To provide a roll forming stand having a roll width variable mechanism and an internal part water cooling mechanism in order that an electric resistance type solid phase pressure welded tube making method capable of high efficiently prod...
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JP3810073B2 |
To provide a joining method utilizing electromagnetic molding to facilitate the joining of a work in which any induction magnetic field cannot be easily formed by inserting an auxiliary ring formed of aluminum or copper between a field s...
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JP2006205246A |
To provide a heating coil with which the work of attaching to and removal from members to be joined of a heating element can be simply carried out and the improvement in assembly workability of the heating element and the like can be ach...
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JP2006205312A |
To provide a processing method and a processing system of seam welded steel pipe inner surface bead chips, for reducing the size of a pipe making line, by easily discharging the chips, even if a blow process of the inner surface bead chi...
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JP3799840B2 |
To manufacture a resistance welded tube capable of preventing the occurrence of grooving corrosion with certainly at a low cost while obviating the necessity of special component regulation and heat treatment. This resistance welded tube...
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JP2006175514A |
To provide an electric resistance welded tube having reduced defects in the weld zone, and to provide its production method.A steel strip mainly comprising iron and an ordinary alloy elements used for a steel material with inevitable imp...
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JP3779811B2 |
To produce a resistance welded steel pipe excellent in workability and suitable for automobile use or machine structural use. This resistance welded tube excellent in workability contains, by weight, 0.02-0.15% C, 0.1-1.5% Si, 1.0-2.0% M...
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JP3770577B2 |
To enable joining of rod-like bodies such as shape different reinforcing bars at sufficient and uniform strength by covering the butted part of the rod- like bodies by a cylindrical mold, arranging the coil of a high frequency induction ...
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JP2006088220A |
To provide an electric welded steel tube manufacturing method for manufacturing the electric welded steel tube having excellent welding quality while consistently suppressing generation of cold junction failure of an electric welded stee...
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JP3760587B2 |
To provide a fire resistant and electric resistance welded square steel tube having cold yield strength and fire resisting strength suitable as a building steel and furthermore excellent in plating cracking resistance. A steel contg., by...
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JP3757506B2 |
To prevent degradation in the alloy characteristics of a joined part, and to prevent generation of cracks by heating a joined surface layer part at the melting temperature or the vapor temperature of the filler metal through the high fre...
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JP3755922B2 |
To reduce defective difference in level by making a flow pattern of induction current flowing in a metal strip. A bent part 34 is formed to the part at the side of both butt faces 111, 112 of a coil wire 31 o a high frequency heating coi...
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JP3751153B2 |
To instantaneously execute the similar welding as conventional spot welding or seam welding without using an electrode and to weld an object to be welded incapable of welding or extremely difficult for welding by a conventional method. A...
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JP3740753B2 |
To provide a resistance welded tube for construction use, increased in yield strength at high temp. at the time of fire, capable of simplification or omission of fireproofing coating, and having yield strength at ordinary temp. and fire ...
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JP3723922B2 |
To prevent the discharging phenomenon of an electro-resistance-welded tube and a bead cutter by fitting a ferromagnetic body having the large hysteresis loss on the outer periphery of the electro-resistance-welded tube between a squeeze ...
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JP3709646B2 |
To provide an electric resistance welded tube welding equipment without causing spark on a flexible conductor and without exchanging the flexible conductor. A current transformer 25 is connected to a transmission duct 21 and a transmissi...
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JP3700321B2 |
To provide a manufacturing device for steel tubes by a tube making method by solid-phase press-contact by which high productivity is secured without requiring bead cutting and a steel tube excellent in seam quality and surface skin is ma...
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JP3694364B2 |
To maintain insulation and dispense with enlargement of power source and its capacity by arranging a shield material made of a good conductive material between a site free of a heating site surrounded by a work coil of the heating site a...
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JP2005238278A |
To provide a method and apparatus for detecting a welding current of an electric resistance welded tube, a method and apparatus for properly monitoring a welding condition by accurately detecting a welding current flowing in the groove o...
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JP3680788B2 |
To provide a method for stably manufacturing a seam welded steel pipe of good seam quality at a high welding efficiency without generating the excessive melting of the end face corner part of the edge part of an open pipe and the insuffi...
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JP2005179146A |
To provide a squeeze roll for producing an electric resistance welded pipe, the squeeze roll being prevented from being broken by thermal shock when it is used by improving thermal shock resistance and strength of a silicon nitride-based...
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JP2005169455A |
To provide an apparatus capable of manufacturing an electric resistance welded tube from a wide thick steel plate as the base material, at a low cost by merely applying a simple device to an existing facility.In the manufacturing apparat...
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JP3664313B2 |
The method of forming a seamed metal tube having a metal coating of this invention includes galvanizing the strip prior to welding. The strip is then formed into an open seam tube and welded in an inert atmosphere with the seam located i...
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JP2005150142A |
To provide a method and an apparatus for connecting which minimizes a product fault generated when a manufacturing line is troubled when an infinitesimal part like a chip-like electronic part is soldered to an electronic part, and which ...
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JP3627603B2 |
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JP2005506205A |
The invention relates to a method of friction stir welding in which use is made of a rotating friction stir welding tool, said tool having a probe, the method comprises, (a) temperature control of the tool during welding of a workpiece o...
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JP3622679B2 |
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JP3609940B2 |
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JP3604720B2 |
PURPOSE: To provide a manufacture of a tube, for filling powder and granular material, in which productivity and the yield are improved. CONSTITUTION: In the manufacture in which powder and granular material is supplied to a tubular body...
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JP3605456B2 |
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JP2004342535A |
To provide a tabular coil for electromagnetic seam welding which is used in an assembly field such as automobile components and electronic components requiring welding of a metal thin plate such as aluminum and copper, which enhances gen...
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JP2004322135A |
To provide a micro-thermoforming method capable of performing microforming below microorder and an electrode used for the same.In the micro-thermoforming of subjecting a member to be thermally formed to microforming by using the member t...
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JP3591067B2 |
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JP3589493B2 |
PURPOSE: To monitor whether or not the specific position of a material becomes molten state in real time. CONSTITUTION: At the initial stage of a molten working before starting the molten work or after the lapse of a specific molten work...
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JP3587944B2 |
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JP2004249296A |
To provide a method for producing a zinc-base alloy-plated, electric resistance-welded steel tube having excellent quality in the welded part without developing defective welding by reducing plating embrittlement crack easily developing ...
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JP3557813B2 |
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