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JP3186261B2 |
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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JP3185612B2 |
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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JP3183324B2 |
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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JP2001179465A |
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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JP2001162381A |
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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JP3176838B2 |
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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JP2001150154A |
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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JP3172435B2 |
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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JP3171086B2 |
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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JP2001138066A |
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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JP3163037B2 |
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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JP2001105184A |
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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JP2001105158A |
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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JP2001096363A |
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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JP2001087808A |
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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JP2001062572A |
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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JP2001047252A |
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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JP2001035646A |
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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JP3132401B2 |
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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JP3132376B2 |
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JP3127065B2 |
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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JP2001009576A |
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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JP3122131B2 |
PCT No. PCT/AU91/00441 Sec. 371 Date Mar. 26, 1993 Sec. 102(e) Date Mar. 26, 1993 PCT Filed Sep. 25, 1991 PCT Pub. No. WO92/05893 PCT Pub. Date Apr. 16, 1992.Structural members (80) having an intermediate web (81) and hollow tubular side...
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JP3122132B2 |
PCT No. PCT/AU91/00442 Sec. 371 Date May 20, 1993 Sec. 102(e) Date May 20, 1993 PCT Filed Sep. 25, 1991 PCT Pub. No. WO92/05895 PCT Pub. Date Apr. 16, 1992.A multiple component structural member is made by cold roll forming two continuou...
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JP3122368B2 |
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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JP3119821B2 |
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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JP2000351085A |
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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JP2000346575A |
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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JP2000343238A |
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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JP3112758B2 |
Apparatus for the deposition welding or the joint welding of a workpiece made of a superalloy by an arc welding process in which the workpiece is supported in a protective-gas container into which is placed a welding electrode and an ind...
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JP2000301355A |
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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JP3104299B2 |
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JP2000288626A |
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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JP2000271761A |
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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JP2000271763A |
To easily estimate a welding condition during a line stop before the start of operation and to execute a stable operation in on-line by storing a resonant waveform resonating to a high voltage pulse applied to the secondary side of an ou...
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JP2000271638A |
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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JP2000271762A |
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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JP3089175B2 |
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JP2000246429A |
To reduce spatters made on the inside surface of the weld zone of a electric resistance welded tube, and to reduce projecting parts on the inside surface of the tube in a seam. After forming tubularly an aluminum bar stock having a surfa...
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JP3086950B2 |
A joint between two metallic materials obtainable by carrying out a process comprising the steps of: providing two metal members (12,14) and a prealloyed interlayer foil (16); creating a joint interface by positioning said foil (16) betw...
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JP2000240504A |
To thin a valve seat, improve the strength of a joining part and thermal conductivity, and suppress hardness change of a material by press-fitting the valve seat made of sintered alloy comprising iron as a main component into a valve por...
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JP2000225474A |
To provide a high frequency induction heating method by which the uniform heat treatment of joining to a material to be heated can be executed with a high frequency induction current, and to provide a high frequency induction heating app...
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JP2000218388A |
To obtain a jointing element with stable quality by performing jointing while a jointing parameter is controlled based on a proceeding condition of a jointing process monitored from a measured value of a reflection echo from a jointing f...
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JP2000218373A |
To precisely control the temperature in an extremely local area of an article, generate a small controlled welding part, and improve physical and mechanical characteristics of the article to be a desired level. This invention provides a ...
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JP2000218380A |
To keep working frequency of a protection circuit low, restrain reduction of operation rate of a welding device, and restrain reduction of product yielding even when a semi-conductor is used for an inverter element by installing plural p...
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JP2000210714A |
To provide an equipment train for steel tubes with which the manufacture of seam welded tubes and solid-phase pressure-welded tubes are enabled with one equipment train. In the equipment train for manufacturing the steel tubes on which a...
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JP3072244B2 |
A bonded pipe produced by using the liquid phase diffusion process in which the pipe ends of pipes to be bonded are butted with an insert material lower in melting point than the pipe material against each other, wherein the thickness is...
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JP2000190021A |
To obtain a Cu plated electroseamed steel pipe superior in external appearance, brazing property, airtightness property at a brazing part, corrosion resistivity, workability and the like by restoring a bead cut part having no Cu plating ...
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JP2000167675A |
To effectively prevent the hardening or the softening of the structure in a welded part and a heat affecting part without needing the welding and tempering treatment process by executing a high frequency resistance welding without prehea...
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JP2000169912A |
To produce a steel pipe having sufficient joint performance at the welded part and having sufficient workability even as it welded from a high tensile strength steel plate.While a high tensile strength steel plate contg. C, Si and Cr as ...
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