Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 101 - 150 out of 1,579

Document Document Title
WO/2005/084857A1
An apparatus comprises a rotating member (2) having one or more rollers (10). The one or more rollers have a plurality of protuberances (12). The rollers may be advanced toward a surface (6) during rotation of the rotating member, such a...  
WO/2005/061137A1
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...  
WO/2005/035154A1
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...  
WO/2004/112977A1
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...  
WO/2004/112978A1
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...  
WO/2004/108310A1
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...  
WO/2004/103593A1
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 ...  
WO/2004/071686A1
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...  
WO/2004/052569A1
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 ...  
WO/2004/007780A1
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 ...  
WO/2003/057383A1
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 ...  
WO/2002/076654A1
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, ...  
WO/2002/062506A1
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...  
WO/2002/055226A1
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), ...  
WO/2002/049781A1
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...  
WO/2001/088210A1
Martensitic stainless steel with high resistance to corrosion, consisting of the following ingredients: Mn from 0.1 % to 0.3 %, P $m(F) 0.02 %, S $m(F) 0.002 % Cr from 10 % to 13 %, C $m(F) 0.02 wt%, Si from 0.1 % to = 0.3 wt%, Ni from 5...  
WO/2000/049191A1
A heat resistant austenitic stainless steel with high strength at elevated temperatures, good steam oxidation resistance, good fire side corrosion resistance, and a sufficient structural stability, suitable for use in boilers operating a...  
WO/1999/019089A1
A piercing mill, in which a drive device employed in a conventional piercing mill is reconsidered in concept and improved with resepect to equipment arrangement. Specifically, a piercing mill for a seamless steel pipe comprising a pair o...  
WO/1999/019092A1
An apparatus and a method for changing a piercer roll of a vertical piercing mill, capable of automating the change operation of a piercer roll and coping with the requirement for a small-lot, multi-product production of seamless steel p...  
WO/1999/019091A1
An apparatus for changing a disc roll of a vertical piercing mill comprising a pair of disc frames (6) capable of supporting a disc roll (3), turning and being released, a disc suspension member (12) for mounting and removing the disc ro...  
WO/1999/019090A1
A piercing mill capable of automating the cannon changing operation and coping with a small-lot, multi-product production of seamless steel pipes having small to large diameters, and a cannon changing method. The piercing mill includes m...  
WO/1999/019093A1
A piercing mill capable of producing thin-walled pipes and improving a work efficiency of a disc roll position adjustment while securing sufficiently support rigidity of a disc roll, comprising a mill housing, a pair of disc frames (6) c...  
WO/1998/029204A1
The lives of a plug and mandrel bar for seamless steel pipe rolling which are subjected to severe operation conditions such as a high temperature and a heavy load are significantly improved. At least the surface layers of the plug and th...  
WO/1998/001589A1
The invention relates to a process for producing weldless steel pipes by hot-rolling of a round block in a plurality of stages. During said process, said round block consisting of interstitial-free (IF) steel is inserted and heated in a ...  
WO/1997/039843A1
A method of producing seamless steel pipes of excellent performance efficiently by an on-line system, and seamless steel pipe manufacturing equipment in which the apparatuses used from a casting step to a heat treatment step are provided...  
WO/1997/033707A1
The invention concerns a method of producing a hollow body from solid round steel by punching in a skew-rolling mill using gauge-forming guide elements, the solid round steel having been heated to shaping temperature. According to the in...  
WO/1996/036742A1
A process for producing seamless steel pipes having performances at least equivalent to those of conventional seamless steel pipes produced by off-line heat treatment, which process permits pipe production and heat treatment to be conduc...  
WO1996021526A1
A method and apparatus for piercing a seamless metal pipe, by which a hollow pipe having a high quality and having no surface scratches is produced without causing any trouble during the piercing at a pipe expansion ratio of more than 1....  
WO/1995/034387A1
The invention concerns a method for the production of a seamless hot-finished tube from steel with reduced deformability, in particular roller-bearing steel, the method calling for a pretreated and degassed as well as deoxidized liquid s...  
WO/1993/018870A1
A tube making mill setup includes an induction heater (12) for a billet (17), with means (34) to transfer the heated billet directly to a piercing machine. The piercing machine includes main driving and gripping rolls (31, 32) on skewed ...  
WO/1993/001894A1
The invention relates to combined methods of processing metal and alloy articles as well as to devices for inplementation of these methods. A method for processing articles comprises evacuation of the space between the article (7) and el...  
WO/1990/000448A1
A cross-rolling mill comprising a plurality of workpiece engaging rolls (10, 11) defining between them a roll aperture through which a workpiece (23) passes during rolling, and a workpiece engaging tool (20) associated with said rolls, t...  
WO/1990/000449A1
In a process for reducing the outer diameter and wall thickness of an essentially cylindrical hollow rough-pierced tube blank by rolling, the front end of the tube blank is introduced into a rolling mill. To prevent piping defects during...  
WO/1988/004583A1
A double roller crossrolling mill for piercing and stretching solid and hollow blocks has adjustable rollers arranged in roller stands. In order to obtain a double roller crossrolling mill with reduced height and limited extension, and w...  
WO/1985/001458A1
An inclined rolling mill includes pressure rolls with an inlet-side interfacial angle and an outlet-side interfacial angle which are disposed with an inclination such as to provide a predetermined angle of lead. The rolling mill is provi...  
WO1982000108A1
A method for controlling the pressing distance of a press roll and to make the actual reduction in thickness of a pipe blank relative to the length of the pipe calculated from the temperature of the pipe blank on the input side of the re...  
JP7440741B2
To provide a steel pipe for a line pipe capable of using under a low temperature condition (-40°C to -80°C), and excellent in welded part toughness.The electro-seamed steel pipe for a line pipe has a predetermined chemical composition,...  
JP7434687B2
The present disclosure relates to a method for straightening of a tube comprising a ferritic FeCrAl-alloy. One reason for the challenges regarding the cold working of a hollow of a ferritic FeCrAl-alloy into a finished tube is that FeCrA...  
JP7425360B2
A martensitic stainless steel material having a yield strength of 125 ksi or more, excellent low-temperature toughness in an extremely low-temperature environment, and excellent corrosion resistance, and a method for producing the marten...  
JP7424399B2
To provide inclined rolling equipment which ensures rolling stability, realizes suppression of seizures, and can manufacture a tube with suppressed wall thickness deviation, an inclined rolling method with use of the inclined rolling equ...  
JP2024011329A
An object of the present invention is to accurately predict the characteristics of steel materials manufactured on a production line that includes quenching and tempering treatments. A material prediction device 10 predicts the character...  
JP2024000976A
An object of the present invention is to provide an inclined rolling method and a seamless steel pipe manufacturing method that suppress external surface flaws due to surface defects of a rolled material. [Solution] An inclined rolling m...  
JP7408206B1
The present invention relates to the technical field of forming seamless composite pipes made of metal, and in particular, provides an apparatus for controlling a gradient temperature on a line for seamless composite pipes made of metal,...  
JP2023183439A
The present invention provides a technique for suppressing the formation of flaws in a rolled material. [Solution] A caliber roll for rolling a material S to be rolled, which has one or two grooves 11 extending concavely in the circumfer...  
JP7397375B2
A martensitic stainless steel seamless pipe having a yield strength of 655 MPa or more and excellent corrosion resistance, and in which formation of an inner surface flaw has been suppressed is provided. The martensitic stainless steel s...  
JP2023134349A
To provide a rolling method which materializes suppression of deterioration of circularity of a cross-sectional shape of a metal tube after rolling, a manufacturing method of a metal tube, rolling equipment and a metal tube.A rolling met...  
JP7319598B2
To manufacture a seamless steel pipe having high accuracy thickness dimension by suppressing occurrence of thickness deviation in a pipe circumferential direction on an original pipe in billet drilling and rolling.Prior to billet drillin...  
JP7276370B2
To provide a plug for manufacture of a seamless steel pipe, which can improve its life, a piercing mill for the manufacture of the seamless steel pipe, which comprises the plug, and a method of manufacturing the seamless steel pipe.A plu...  
JP7239019B2
Provided herein is a seamless steel pipe and a method of manufacture thereof having an improved fatigue life and that can be produced with an improved yield by reducing trouble that occurs during cold working when cold working (cold draw...  
JP7226591B2
A method disclosed herewith is a method for producing a first seamless metal tube with a first wall thickness and a second seamless metal tube with a second wall thickness by using a three-roll-type inclined rolling mill, and the method ...  

Matches 101 - 150 out of 1,579