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Matches 1 - 50 out of 2,055

Document Document Title
WO/2014/112865A1
A method of producing a unitary pipe having a combination of square and circular cross sections comprising the steps of securely clamping a workpiece (10) or a pipe having a square cross section to a workpiece grip of a lathe machine; sp...  
WO/2014/109180A1
A plug for hot pipe manufacturing, provided with: a main plug body; a build-up layer formed on the surface of the main plug body around the axis of the main plug body; and a sprayed coating formed on the surface of the build-up layer.  
WO/2014/067514A1
The invention relates to a method for producing seamless steel pipes in a rolling train having one or more longitudinal or transverse roll stands arranged one behind the other and an internal tool that is used as a piercing mandrel or ro...  
WO/2014/048670A1
The invention relates to a method for producing a tube (2) or tubular pre-product from a solid billet in a rolling mill, comprising at least one roll (5a, 5b) acting from the outside on the solid billet or tubular pre-product and a mandr...  
WO/2014/045140A2
The invention relates to a pipe rolling plant 10 comprising a rotary piercer 20, a treatment station 30 and a main rolling mill 40. The rotary piercer and the treatment station are arranged so that the pierced blank 51 leaving them is ar...  
WO/2014/045140A3
The invention relates to a pipe rolling plant 10 comprising a rotary piercer 20, a treatment station 30 and a main rolling mill 40. The rotary piercer and the treatment station are arranged so that the pierced blank 51 leaving them is ar...  
WO/2014/030692A1
This inner-surface control tool is provided with a mandrel, a plug that is removably joined to said mandrel, and a joining member that magnetically joins the plug and the mandrel to each other. Either the plug or the mandrel has a column...  
WO/2014/030593A1
This plug for hot pipe manufacturing is provided with the following: a plurality of plug pieces that can be attached to and detached from each other; and a joining member that magnetically joins the plug pieces together. One of the plug ...  
WO/2013/183213A1
This manufacturing method for a piercing plug used in a piercing mill for manufacturing a seamless steel pipe includes a shot blasting step wherein shot blasting is applied to the plug surface and an arc spraying step wherein a thermal s...  
WO/2013/161175A1
This method for producing a plug used in a piercing mill used in the production of a seamless steel pipe includes: a shot blasting step for shot blasting the surface of a plug; and an arc spray step for forming a coating film by arc spra...  
WO/2013/161177A1
This facility for producing a plug used in a piercing mill used in the production of a seamless steel pipe is provided with: a shot blasting device that shot blasts the surface of a plug; and an arc spraying device that arc sprays an iro...  
WO/2013/161176A1
This method for manufacturing a plug that is used in a piercing and rolling machine, which is used in manufacturing seamless steel pipe, includes an arc spraying step in which iron wire is melted by an arc spraying machine, that molten m...  
WO/2013/161489A1
In order to extend the service life of a plug used in a piercing machine that pierce-rolls a billet, a plug (10) used in a piercing machine (30) that pierce-rolls a billet (36) is equipped with a plug main body (12), a buildup layer (14)...  
WO/2013/157351A1
There is provided a round billet that allows for a reduction in damage to a piercing plug in a method for producing seamless metal tubes using the Mannesmann method. A round billet (5) is a round billet for seamless metal tubes processed...  
WO/2013/157312A1
There is provided a plug for a heat-formed pipe that includes a sprayed coating that is difficult to peel off. A method for producing a plug for a heat formed pipe according to an aspect of the present embodiment includes a step for prep...  
WO/2013/153878A1
The objective of the present invention is to provide a plug which is used in a piercing machine that pierce-rolls a billet, and for which the number of uses of said plug can be improved, and to provide a method for regenerating a plug. T...  
WO/2013/107845A1
The rolling stand comprises four support columns (2), two conical rolling rolls with skewed rolling axes which are oblique to each other and are fixed to two roll cradles (6, 7), four jacks (24, 26) below the lower roll cradle (7) for ex...  
WO/2013/065554A1
Provided is a seamless-metal-pipe manufacturing method whereby cracking of the pipe when in a molten state is inhibited. The seamless-metal-pipe manufacturing method in this embodiment is provided with the following steps: a step (S2) in...  
WO/2013/065780A1
Provided is a boring device wherein the occurrence of flaws in the inner surface of a hollow shell is suppressed. A boring machine (10) according to an embodiment of the present invention is a boring device (10) for boring a billet (18)....  
WO/2013/065553A1
Provided is a seamless-metal-pipe manufacturing method whereby cracking of the inner surface of the pipe is inhibited. The seamless-metal-pipe manufacturing method in this embodiment is provided with the following steps: a step (S2) in w...  
WO/2013/018564A1
The present invention provides a controlled rolling method of a seamless steel tube excellent in strength and low-temperature toughness to be applied to a process of making a seamless steel tube, and this controlled rolling method compri...  
WO/2012/173510A1
The invention relates to the field of rolling, in particular to the mechanical working of metals, and concerns screw piercing methods. The aim of the invention is to increase the quality and accuracy of the geometrical dimensions of tube...  
WO/2012/121907A3
A swellable packer can include a material which swells when contacted with a swelling fluid, and a barrier comprising a highly crystalline polymer which is substantially impermeable to the swelling fluid. A method of controlling swelling...  
WO/2012/086177A1
In the piercing rolling using a plug having a protective coating film formed on the surface thereof, a lubricant agent that is an aqueous solution containing one or more of boron oxide, boric acid and a boron amine salt in the total amou...  
WO/2012/086179A1
When there is produced a round steel bar that comprises a high alloy containing Cr of 20 to 30 mass%, Ni of 30 to 50 mass%, and at least one kind of Mo and W that is 1.5 mass% in terms of Mo+0.5W, and in which a continuous casting slab h...  
WO/2012/077334A1
A pusher following a pass line is disposed on the entry side and a plug on the exit side, and a punch, in which a plurality of inclined rolls are disposed in opposition around a plug, is used. When the maximum diameter for an inferior qu...  
WO/2012/060358A1
Disclosed is a method for detecting defects in rotary piercing with high accuracy. A rotary piercing mill (10) is provided with piercer rollers (1a, 1b), a piercer plug (3), a rolling load sensor (4), a thrust load sensor (5) and a contr...  
WO/2012/003691A1
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...  
WO/2011/047524A1
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) ...  
WO/2011/039943A1
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...  
WO/2011/003501A1
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...  
WO/2010/139200A1
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...  
WO/2010/100968A1
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 ...  
WO/2009/147087A1
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...  
WO/2009/122620A1
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...  
WO/2009/118957A1
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...  
WO/2009/119245A1
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...  
WO/2009/049589A1
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...  
WO/2009/011146A1
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) ...  
WO/2008/142803A1
[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...  
WO/2008/138032A1
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 ...  
WO/2008/126427A1
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...  
WO/2008/081866A1
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...  
WO/2008/062752A1
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...  
WO/2008/032508A1
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...  
WO/2008/020510A1
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...  
WO/2007/122972A1
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...  
WO/2007/116821A1
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...  
WO/2007/110930A1
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...  
WO/2007/100042A1
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...  

Matches 1 - 50 out of 2,055