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JP2001287048 |
To provide a thin-walled welded pipe of a small diameter which has high weld strength and excellent weld gastightness. The welded pipe is manufactured by being formed into a tubular form by continuously feeding a plate material in a mann...
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JP3236475 |
PURPOSE: To provide manufacture of a welded pipe whereby thin walled pipe, especially extremely thin walled pipe is able to be manufactured. CONSTITUTION: At least two means 11, 13 for restraining the welded pipe after butt welding are p...
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JP2001259733 |
To easily adjust a butt pressure at both side edge of a band plate material in welding a seam welded pipe so as to improve welding reliability.An apparatus is provided with band plate material feed mechanisms 1, 2, 12, 24, 26 to run a me...
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JP3234792 |
To automatically secure initial energization to a web and a flange by using a welding tip, which is brought into contact with a material to be welded in a manner of being freely slidable for the purpose of feeding a high frequency electr...
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JP3232040 |
To suppress a high temp. crack, brittle and prevent a yield of an ultasonic flaw inspection from lowering by reducing a hardness of a weld zone in producing a high carbon steel resistance weling steel tube of a high workability mechanica...
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JP3230447 |
To provide an electro-resistance welded pipe seamed part detecting device and its method which can carry out the most suitable and highly accurate detection of a seamed part to the surface state of an electro-resistance welded pipe. An e...
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JP3230290 |
PURPOSE: To prevent a fault caused by discharge chipping of a cutting tool by providing a cooling washing tank between a squeeze roll and the cutting tool, providing an annular ferrite iron core in this tank and allowing a tube body to p...
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JP2001239313 |
To provide a method of manufacturing an electric-seam welded steel pipe which is suitable for producing a small lot and many kinds, can lighten a mill load and is further excellent in being processed, having nice surface texture without ...
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JP2001225109 |
To contrive time reduction by rationalizing the process for changing the top roll of a squeezing roll stand in an electric resistance welded tube manufacturing line and performing the operation rapidly and exactly.A top roll changing dev...
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JP2001212677 |
To provide an impeder for manufacturing a welded pipe capable of improving a welding efficiency by leaps and bounds and having a longer life and superior in corrosion resisting capability, and a manufacturing method for the welded pipe.I...
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JP2001208274 |
To quickly join fitting parts of a pipe mutually without any clearance.A first pipe 11 and a second pipe 12 are made of resin respectively and a fitting part 22 is formed by fitting their respective ends together. A conductive heating me...
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JP3214382 |
To prevent a high frequency current at the time of welding from flowing as a reactive current through a seam guide roll and then to improve welding efficiency and further quality of welding by forming a seam guide roll used for seam weld...
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JP3214383 |
To prevent the high frequency current at the time of welding from leaking ad a reactive current through a seam guide roll and to improve welding efficiency and further the quality of welding by forming the seam guide roll used for seam w...
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JP2001198682 |
To correctly and surely detect sparks generating when welded wide flange shape steel is manufactured by applying high frequency resistance welding to web stocks and flange stocks consisting of steel strip. A spark detector 20, which is p...
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JP2001179465 |
To provide a manufacturing method of a welded wide flange shape capable of effectively preventing a product from bending generation. In a manufacturing process of a welded wide flange shape to form the wide flange shape by welding/joinin...
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JP2001170779 |
To provide a steel tube manufacturing method by the solid phase press welding in which the increase in wall thickness of internal and external surfaces of a seam portion is suppressed, and the internal and external surfaces of the seam p...
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JP2001162381 |
To manufacture a welded shape while eliminating the attraction phenomenon between induction heating apparatuses and a flange using a manufacturing apparatus disclosed in Japanese Unexamined Patent Application Publication No. 8-155657.The...
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JP2001150153 |
To propose a method of manufacturing for steel tubes which has high productivity and is adaptive to the production of small lot many kinds.After band steel is heated to the temperature range of ≤800°C, the steel is made into an open t...
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JP2001150154 |
To provide a manufacturing method which is suitable to application to the manufacture of an electric resistance welded aluminum tube of ≥2 mm thick the electric resistance welded part of which is mostly free from weld defects and a met...
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JP2001138066 |
To produce an inexpensive electric resistance welded pipe exhibiting excellent hydroforming workability without newly providing special stages such as heat treatment. As for the method for producing a high workability carbon steel pipe f...
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JP3185612 |
PURPOSE: To identify an effective push-up position and a necessary push-up force to the elimination of an edge wave to push up the edge parts and to prevent a defective shape by pushing up and expanding the edge part of a forming materia...
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JP3186261 |
PURPOSE: To achieve higher reliability in the quality of welding by performing a grooved rolling of a bar for a welding heat exchanger tube in such a manner that no variations are caused in the width and in the shape of the end rim of th...
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JP3183324 |
To secure excellent toughness and excellent strength of a weld zone to the change of Ceq by controlling the heating temperature at the center of a flange within the prescribed temperature range in welding a web to the flange. In a wide f...
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JP2001105184 |
To reduce a manufacturing cost by arranging a cutting cylinder and an expanding cylinder parallel to the tube axis, having a construction hardly receiving a constraint from a tube diameter of a resistance welded tube to be formed, improv...
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JP2001105158 |
To provide a induction heating coil for the diffusion welding of a joint part of a railroad rail and to provide a diffusion welding method using the method. This induction heating coil 3 is arranged so as to enclose the outer periphery o...
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JP2001096363 |
To provide a method and equipment that improves efficiency of welding process. A groove 16 is made at the butt end of steel plates 10 and 12 to be connected to each other welding equipment 20 is moved along the groove 16 to weld the groo...
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JP3176838 |
To eliminate a temp. difference between a flange stock and web stock at a weld point even when preheating of a flange is further strengthened and a size difference between a flange stock and web stock is large. By causing a high frequenc...
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JP2001087808 |
To provide a method for making a bear projecting on the side of the inside surface to the absolute minimum in a method for manufacturing a grooved electric resistance welded tube for air conditioners from a thin belt- like aluminum plate...
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JP3171086 |
To provide the resistance welded tube production equipment and method thereof capable of suppressing an edge wave and enabling a large stabilized butting region and stabilized forming. In the resistance welded tube production equipment h...
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JP3172435 |
To efficiently straighten a defective squareness and an umbrella-shaped bent with enough straightening capacity. This device has total four sets of lift-up units 8 composed by making mutual corresponding parts to each end part of upper a...
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JP2001062572 |
To provide an impeder device which can prevent a strength supporting body from being induction heated, and endure heavy cutting of inner beads without enlarging a cross section area of the strength supporting body, or without lessening a...
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JP3163037 |
To enhance control precision, to improve welding quality and to increase productivity by measuring frequency and size of spark at the time of welding a resistance welded tube, feeding back the result and automatically controlling a weldi...
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JP2001047252 |
To provide an impeder which shows an excellent durability when used under a high frequency and a large power by gluing cores together composed of a magnetic metal material in one or more forms of wires whose diameter is a prescribed valu...
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JP2001035646 |
To surely join with small power energy in a short time and enhance safety by installing a C-type inductor together with a C-shaped core capable of inserting a junction of a joining material such as a pipe material or a rod material into ...
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JP2001009576 |
To provide a metallic material jointing method wherein a butt part is accurately heated to a desired jointing temperature during liquid phase diffusion jointing and a jointing product having a proper mechanical strength can be obtained, ...
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JP2000351085 |
To always execute welding in the best matching state to products having an optional size.This equipment is provided with a tilting driving mechanism 41 for varying a mutual inductance M of the primary side coil and the secondary side coi...
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JP2000346575 |
To prevent adherence of a foreign matter to a welded portion and a decrease in an aesthetic apparatus by coaxially disposing a forming roll for shaping a traveling plate strip material, and a formed plate strip material, and disposing bo...
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JP2000343238 |
To easily smooth an inner circumferential surface without cutting a bead or a recess generated during the electric resistance welding, and to prevent generation of chips of the bead by arranging a roller in an electric resistance welded ...
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JP3132401 |
To easily adjust the position of a flange guide roll accompanied by the change in the flange width, the wear of the flange guide roll, and the reform-cutting of a web supporting roll without changing the roll, to increase the range of th...
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JP3127065 |
PURPOSE: To provide an electric resistance welded tube for door reinforcing member with reducing residual stress and excellent in delayed fracture resistance. CONSTITUTION: The outer periphery of the electric resistance welded tube made ...
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JP2000301355 |
To provide a eutectic press-contacting method and eutectic press- contacting device for the same kind of metallic member (especially, a low melting point aluminum alloy). In a eutectic press-contacting method, an insert material 3 is hel...
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JP3122368 |
To perform the welding by correct positioning without generating deviation, oscillation, etc., on each side edge part in an electric resistance welding equipment of a metal tube in which a metal plate member is curved in its width direct...
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JP2000288626 |
To prevent welding defects and to improve yield even when an electric resistance welded tube whose thickness as compared to the outside diameter. This device is provided with a thicker part forming roll 4 and flat roll 6 for forming thic...
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JP3119821 |
To improve the yield and the product shape by suppressing as far as possible stretch acting to the edge part of a steel plate in a cluster roll group so as to prevent waving and to reduce butting defect at welding. The breakdown roll gro...
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JP2000271606 |
To drastically improve the joined strength by executing the pressing in a joining process of during impressing the alternative field with an induction heating device or within the time after the pregrasped turn-off of the electric source...
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JP2000271762 |
To prevent the overcurrent of a plurality of parallel induction heating coils by respectively detecting heating currents flowing through the induction heating coils and controlling a heating power source using a high current value select...
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JP2000271761 |
To surely prevent the hardening of a weld zone even when a postannealer after welding an open pipe is not provided. This method is a manufacturing method of an electric resistance welded tube 0 in which an open pipe 8 is made by roll-for...
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JP2000271638 |
To obtain a tube manufacturing line wherein a metal strip is easily passed through keeping a straight advancing property from a squeeze roll without a tube body supporting mechanism to a sizing roll, a time until the starting of welding ...
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JP2000271604 |
To drastically increase the joining strength between a preceding material and a succeeding material. At the time of joining the preceding material to succeeding material on the inlet side of a finishing mill 2 of a continuous hot rolling...
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JP2000271605 |
To drastically improve the joined strength by raising the temp. of each joining surface of a preceding steel slab and the succeeding steel slab in a heating process so as to become the liquidus temp. or higher of the steel slab. In the c...
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