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WO/2012/003691 |
A planetary pipe rolling mill includes a feeding mechanism for feeding hollow casting blank, a planetary main machine (1) for rolling the hollow casting blank within which a roller group (11) and a rolling-die quick-cooling mechanism are...
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WO/2011/047524 |
A three-roller planetary rolling method for rolling brass pipe, includes the following steps: processing the front end of the raw pipe (1) to be a cone (11); selecting a mandrel (7) to make the unilateral gap (L) between the mandrel (7) ...
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WO/2011/039943 |
Disclosed are a retract mandrel mill and a method for rolling tubing using the mandrel mill. The retract mandrel mill is provided with a mandrel mill and an extractor. The mandrel mill includes a mandrel bar and is for rolling a tubing w...
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WO/2011/003501 |
The invention relates to a method for ironing roller spinning, in which method a tubular workpiece (10) is arranged around a rolling mandrel (20), is set in rotation and is formed by setting at least one forming roller (40) against it. D...
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WO/2010/139200 |
A rolling method for a shell ring includes a first roller (31) and a second roller (32) which extrude the inner wall and the outer wall of the shell ring respectively. The first roller (31) and the second roller (32) are driven by a driv...
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WO/2010/100968 |
A plug has a front portion of convex shape, a generally cylindrical portion, a trunk portion having an external radius gradually enlarging toward the rear end, a mandrel connecting portion at the rear end, and a lubricant path extending ...
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WO/2009/147087 |
A rolling mill of rotating expander type for tubular bodies, comprising: working rollers (1, 2) arranged inclined with respect to the rolling axis; a tip (3) fitted on a beam (4), so that the tubular body is pushed in rotation between th...
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WO/2009/122620 |
A hole (30) is formed in the center of the rear end face (20) of a round billet (10). The hole (30) has a predetermined depth from the rear end face (20) and a plurality of grooves (31) are provided in the side surface thereof. Each groo...
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WO/2009/118957 |
Disclosed is a high-alloy seamless steel pipe manufacturing method, in which a high-alloy steel billet heated to a temperature range of 900 to 1250 °C is pierced and rolled by a piercer equipped with a main roll having a surface roughne...
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WO/2009/119245 |
A method for producing a seamless pipe by performing the piercing rolling of round billets heated to 1250°C or less by means of a piercer where plugs are arranged along a pass line between a pair of inclined rolls and a pair of guide me...
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WO/2009/049589 |
The invention relates to a method for measuring the eccentricity of a hot-fabricated seamless steel tube during production, in which the tube is produced in the form of a hollow block tube from a solid block or from a hollow block tube w...
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WO/2009/011146 |
A pusher device (4) has a cylinder device (30) and a pusher core (34). The cylinder device (30) has a cylinder shaft (32). The pusher core (34) is fitted to the front end of the cylinder shaft (32). The front end of the pusher core (34) ...
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WO/2008/142803 |
[PROBLEMS] To provide a method, and apparatus, for piercing and rolling a seamless pipe, with which material peeling can be prevented even when a pipe expansion ratio is raised through increasing of skew angle δ. [MEANS FOR SOLVING PROB...
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WO/2008/138032 |
A method of cold forming a length of polycarbonate sheet, including the step of feeding the polycarbonate sheet through a roll forming station. A security panel having opposed side edges bent to extend back over a central portion of the ...
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WO/2008/126427 |
A boring machine (10) comprises a plurality of slant rolls (1), a plug (2), a pusher (4), and a guide roll (6). The pusher (4) pushes a round billet (20) from the rear end at least until the round billet (20) advances a predetermined dis...
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WO/2008/081866 |
A raw material to be rolled made of a high-chromium high-nickel alloy steel containing, in terms of mass%, 20-30% chromium, 30-50% nickel, and at least one of molybdenum and tungsten, the amount of the latter two being 1.5% or more in te...
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WO/2008/062752 |
In the manufacture of a seamless pipe, a piercing rolling has the following characteristics (a) to (d). (a): a plug tip drawing ratio (TDFT) is 0.04 or less, or the root (TDFT x N)0.5 of the product of TDFT and a billet rotation speed (N...
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WO/2008/032508 |
A device for monitoring the manufacturing status of a seamless pipe, capable of quickly correcting manufacturing conditions during operation of a seamless pipe manufacturing facility. The device (20) for monitoring the manufacturing stat...
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WO/2008/020510 |
A high quality hollow material pipe is produced surely by controlling the number of times of rotary forging and shear deformation in an unsteady region during biting, preventing occurrence of flaw on the inner surface resulting from rota...
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WO/2007/122972 |
A lubricant composition for hot plastic working and a method of hot plastic working which are effective in preventing the surface of a material being processed by hot plastic working from suffering mars. The lubricant composition for hot...
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WO/2007/116821 |
In this method of manufacturing a seamless pipe, a billet is disposed on a pass line between a pusher and a plug and is moved forward until it is caught between skewed rolls. Then, after the caught billet is in contact with the plug unti...
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WO/2007/110930 |
A process for producing a seamless pipe characterized by including a continuous casting step in which a round billet is cast in which the whole region in a central part having a diameter of at least 60 mm in the cross section is constitu...
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WO/2007/100042 |
A billet containing, by mass, 8.0 to 16.0% Cr whose value of the formula: Cr+4Si-(22C+0.5Mn+1.5Ni+30N) wherein the atomic symbols represent the mass% contents of respective constituent elements in steel is 9.0% or less is heated by means...
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WO/2007/100259 |
Abstract A tool (16) for connecting and disconnecting tubulars near a drill floor (2), comprising a power tong (18) and a backup tong (20), wherein the tool (16) is located at the same level as or below the drill floor (2).
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WO/2007/094424 |
A disk roll comprises a shaft member and a circular ring member fitted to the outer periphery of the shaft member. The ring member is formed in a circular ring shape and fitted to the disk-like shaft member. The ring member is formed of ...
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WO/2007/040768 |
The invention provides a method for manufacturing a friction damped disc brake rotor, including the steps of: (A) providing a ceramic coating on an insert, wherein the insert has a body with tabs extending therefrom to hold the insert in...
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WO/2006/134957 |
A plug (2) used for a boring machine, comprises a tip part (23), a cylindrical part (24), a body part (25), a core joining part (22), and a jetting hole (21). The jetting hole (21) is passed through from the surface of the cylindrical pa...
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WO/2006/133696 |
The invention relates to a device for the production of a seamless hollow body (10) from a solid round block (7) of steel with a diameter < 95 % of the diameter of the solid round block by means of a twin-roller cross-rolling mill on a m...
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WO/2006/126678 |
A roll for rolling seamless pipes which has a roll neck and a roll body, wherein the surface layer of the roll body comprises by mass: C: 1.5 to 2.5%, Si: 1.3 to 3.5%, Mn: 0.1 to 2.0%, Ni: 0.5 to 8.0%, Cr: 0.1 to 2.0%, Mo: 0.2 to 5.0%, V...
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WO/2006/106802 |
A method for producing a seamless tube while reducing the inner surface scratches comprising a piercing step, in which the relations shown by expressions (1)-(3) are simultaneously satisfied if the diameter of a billet is R(m), the crack...
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WO/2006/085599 |
A seizing inhibitor for hot plastic working which is a two-pack type inhibitor consisting of: a first aqueous solution containing sodium silicate in an amount of 10-30 mass% in terms of anhydride amount based on the whole first aqueous s...
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WO/2006/003954 |
A nickel base alloy material tube which has a chemical composition that C ≤ 0.04 %, Si ≤ 0.50 %, Mn: 0.01 to 6.0 %, P ≤ 0.03 %, S ≤ 0.01 %, Cr: 15 to 30 %, Ni: more than 45 % and not more than 60 %, Mo: 0 to 18 %, W: 0 to 36 %, w...
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WO/2006/003953 |
A raw pipe made of an Fe-Ni alloy, which has a chemical composition that C: 0.04 % or less, Si: 0.50 % or less, Mn: 0.01 to 6.0 %, P: 0.03 % or less, S: 0.01 % or less, Cr: 20 to 30 %, Ni: 30 to 45 %, Mo: 0 to 10 %, W: 0 to 20 %, Cu: 0.0...
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WO/2005/123289 |
A process for producing a seamless steel pipe, in which the occurrence of inner surface flaw in the pipe can be reduced through lowering of the friction coefficient at draw rolling by means of a mandrel mill. At the draw rolling of hollo...
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WO/2005/115650 |
A round billet comprising 10.50 to 14.00% by mass of Cr and satisfying a value of not more than 9.0% as determined by a formula [Cr + 4Si - (22C + 0.5Mn + 1.5Ni + 30N)] wherein the symbol of element represents the content (% by mass) of ...
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WO/2005/068098 |
A method for producing a seamless pipe in which carburization occurring in the production process of a pipe is prevented and the stretch-rolling process is rationalized. In the process of producing a seamless pipe, a pipe bored in a bori...
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WO/2005/061137 |
A lubricant supply system and an apparatus and a method for manufacturing a seamless pipe having the supply system which are required for efficiently manufacturing the high quality seamless pipe in a drilling/rolling machine. The lubrica...
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WO/2005/035154 |
A method of manufacturing a seamless tube, wherein the ratio of the inner peripheral length of a tube material to the outer peripheral length of a mandrel bar is set within the range of 1.07 to 1.17 in the final two stands of stands form...
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WO/2004/112977 |
A austenitic stainless steel bored tube stock having excellent inner surface properties and a method capable of mass-producing sound stainless seamless steel tube on an industrial scale. Austenitic stainless steel billets with P of 0.040...
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WO/2004/112978 |
Apparatus for reducing the diameter, rounding or straightening of pipe or tubing by rolling comprising a plurality of closely and equallyspaced, long, narrow, parallel-cylindrical rollers arranged in a parallelcylindrical array throu...
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WO/2004/108310 |
A drilling/rolling method in manufacturing a seamless tube capable of suppressing additional shear deformation by suppressing rotational forging effect without so reducing roll diameter, characterized in that the tilt angle (β) of a mai...
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WO/2004/103593 |
A method of manufacturing a seamless tube, wherein miss-rolling such as defective biting is prevented from occurring by satisfying either of the expressions (1) to (3) below according to the range of roll diameter ratio of Dg/Dl and the ...
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WO/2004/071686 |
A method of manufacturing a seamless steel tube for a drive shaft and a method of manufacturing the seamless steel tube, wherein a hollow member for the drive shaft having excellent fatigue strength and suitable for reducing the weight o...
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WO/2004/052569 |
The invention relates to a seamless metal tube piercing-rolling method using an inclined roll type piercing-rolling machine, capable of greatly suppressing Mannesmann fracture or circumferential shear strain without causing a failure in ...
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WO/2004/007780 |
The present invention provides a martensitic stainless steel seamless pipe, having no inner surface defect and suppressing a delayed fracture generation in the impact-worked portions, and a method for manufacturing such a seamless steel ...
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WO/2003/057383 |
The invention relates to a method for producing rods, bar stock or seamless tubes on a rolling stand for rolling hot metal material. Said rolling stand optionally comprises, when seen in the direction of rolling, a piercing-crossrolling ...
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WO/2002/076654 |
A method for manufacturing a seamless steel pipe which is excellent in properties of its inner surface and its wall. A round billet having a center segregation zone parting degree W (%) of 20 % or more, defined by the following formula, ...
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WO/2002/062506 |
The invention relates to a device for forming elongated workpieces (1) without chip removal, in which an input-side roller station (3), a machining station (4), and an output-side roller station (5) are arranged on a common machine frame...
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WO/2002/055226 |
A method for manufacturing a tube made of a non-ferrous material, particularly a tube made of mainly copper, by rolling, in which method, in the first working step (F¿1?) the tube billet (1) is worked by rolling with conical rolls (2), ...
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WO/2002/049781 |
A method for manufacturing a tube made of a non-ferrous material, particularly a tube made of mainly copper, in which method, in the first working step the tube billet (1) is worked so that mainly owing to the deformation resistance, the...
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