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Matches 1 - 50 out of 2,130

Document Document Title
WO/2020/189140A1
The objective of the present invention is to provide a method for manufacturing a seamless square steel tube with which it is possible to obtain a seamless square steel tube having a corner portion S value equivalent to those in the past...  
WO/2020/150715A1
A tubular structure is disclosed. The tubular structure has a first sheet metal having a machine direction. The first sheet metal is convolutely wound about a longitudinal axis and has a tail portion. The tail portion of the first sheet ...  
WO/2020/074620A1
The invention relates to a controller (2) and a method for controlling a stretch-reducing rolling mill (1) for rolling tubes (R), having multiple roll stands (10) arranged one behind the other in the conveyor direction (F) of the tubes (...  
WO/2020/038832A1
The invention relates to a method and to a control unit for controlling a stretch reducing rolling mill for rolling pipes, comprising a plurality of roll stands (7) arranged one behind the other in a conveying direction of a pipe (6) to ...  
WO/2020/015554A1
A composite forging and rolling metal tube forming machine, comprising: a feeding device, a composite forging and rolling forming device, and a transmission device connected in sequence. The composite forging and rolling forming device c...  
WO/2020/015556A1
A small-diameter thick-walled metal tube, wherein the cross-sectional diameter range of the metal tube is 30-160mm, the size precision is ±0.2mm, and the ratio between the outer diameter and the wall thickness of the metal tube is great...  
WO/2019/219463A1
A stretch-reducing mill (1) for producing seamless pipes (R), which comprises a plurality of roll stands (10), which are arranged one after the other in a conveying direction (F) of the pipes (R) and each have three rolls (11) arranged a...  
WO/2019/188224A1
The purpose of the present invention is to provide a high-strength hollow stabiliser and an electric-welded steel tube for producing a high-strength hollow stabiliser having excellent anti-fatigue characteristics. An electric-welded stee...  
WO/2017/207660A1
The invention relates to a method for producing an elongate hollow body consisting of steel and having a polygonal cross-section, comprising the following steps: producing an intermediate hollow body having a round cross-sectionfrom a fl...  
WO/2017/134186A1
A method for producing a tube of a stainless steel alloy tube which comprises the steps of hot working a stainless steel casting into a pretubular shaped workpiece or into a cylindrical bar, trepanning the cylindrical bar or machining an...  
WO/2017/068533A1
The present invention relates to a multi-stand rolling mill (1 ) for tubular bodies. The rolling mill comprises a first section (10) for rolling on mandrel defined by a first plurality of rolling stands (15', 15, 15") arranged in sequenc...  
WO/2017/005666A1
The invention relates to a device and a method for producing a pipe (1) from a hollow block (2) which has an opening (3). The device has a rolling mill (30) for rolling the hollow block (2) via a rolling rod (21) introduced into the open...  
WO/2016/202551A1
A rotary extrusion machine (20) comprising: a rotatable spindle (21) comprising clamping means (211) for clamping a first end of a workpiece and for rotating said workpiece around a first axis; a punch (22) rotatable around said first ax...  
WO/2016/084298A1
Provided are a device array for manufacturing a seamless steel pipe or tube and a method for manufacturing a high-strength duplex stainless steel seamless pipe or tube for oil wells with superior low-temperature toughness. The device arr...  
WO/2016/016751A1
The present invention relates to a compact plant (10) for rolling a seamless tube. The plant comprises a rotary piercer (20) which defines a rolling axis XPR and is designed to pierce a billet (11) pressed against a plug (22) mounted on ...  
WO/2016/016750A1
The present invention relates to a plant (10) for rolling a seamless tube. The plant comprises a rotary piercer (20) which is designed to pierce a billet (11) pressed against a plug (22) mounted on a rod so as to obtain a pierced blank (...  
WO/2016/016224A1
The invention relates to a method for producing hot-rolled seamless pipes having at least one thickened wall portion that can be arranged at arbitrary positions across the length of the pipe, wherein by means of a multi-stand rod rolling...  
WO/2015/175688A1
Reflectors for solar concentration and methods for formation thereof. A reflective assembly (1340) may include a plurality of elongate panels (370) forming a continuous trough (1330), and a frame (1230) configured to support the panels, ...  
WO/2014/182198A1
The method provides uniformity of the mechanical properties of thick-walled and thin-walled parts of pipes of variable cross section. The method is distinguished in that, first, a tubular semifinished product is subjected to deformati...  
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/2014/045140A2
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/2014/027655A1
This powder lubricant composition includes 65-95 parts by mass of sodium borate and 5-35 parts by mass of cryolite. This method for manufacturing a seamless steel tube has a powder lubricant composition attachment step for attaching the ...  
WO/2014/017370A1
This seamless metal tube fabrication method is provided with the following: a step for determining whether to use the group of front stage stands for reducing the outer diameter or reducing the thickness of the hollow raw pipe, and a ste...  
WO/2014/017372A1
This seamless metal tube fabrication method is provided with the following: a step for preparing a plurality of mandrel bars the work sections of which that come into contact with the hollow raw pipe during drawing and rolling have diffe...  
WO/2013/115138A1
Provided is a hot-working tool having superior seize resistance. The present embodiment of a hot-working tool is provided with a substrate and a plating film. The plating film is formed at the substrate surface. Furthermore, the plating ...  
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/2012/133484A1
Provided is a method for manufacturing a roll for reducing, wherein the occurrence of fin flaws and edge flaws can be suppressed. A roll for reducing used in a three-roll reducing mill is prepared. Next, while the roll for reducing is be...  
WO/2012/120111A1
A tube rolling plant (R) with multi-stand rolling mill having two or more rollers, for implementing a mandrel rolling process with controlled speed has a mandrel (31) which is inserted into the hollow body (39) from the frontal opening t...  
WO/2012/075095A2
A pipe element has a circumferential shoulder at one end. The shoulder has an outer diameter greater than the outer diameter of the pipe element. A groove is positioned adjacent to the shoulder. The groove has a floor surface with an out...  
WO/2012/005287A1
Provided is a mandrel mill which has three hole-type rolls disposed at each of a plurality of rolling stands and without increase in facility costs or degradation in maintainability, is capable of sufficiently preventing a phenomenon in ...  
WO/2011/154133A1
The invention relates to a method for producing seamless pipes of heated massive metal blocks, by means of a mandrel (4), which is fastened on a rolling rod (5), in the case of which a coating material is applied onto the inner side of t...  
WO/2011/148613A1
A three-roll fixed diameter rolling machine is used, and when the external diameter processing degree (ρi) (%) of an (i)th stand is represented by formula (1) below, fixed diameter rolling is carried out under conditions such that the e...  
WO/2011/083101A3
The invention relates to a rolling system for producing tubes without welded joints, comprising: a drill (7) for drilling a billet and obtaining a blank (2); a continuous mill (8) for rolling the blank (2), said mill (8) comprising a plu...  
WO/2011/107214A1
The invention relates to a hot work tool, in particular a piercing mandrel or a rolling bar for producing seamless pipes or a forging mandrel for hot forging tubular workpieces made of metal, said tool having a main tool body (2), wherei...  
WO/2011/050783A3
The invention relates to a device for the optimized circulation of mandrels, comprising a presentation and/or cooling table (1) for mandrels, a lubricating station (2) for the mandrels, in some cases an additional drying station for the ...  
WO/2011/050783A2
The invention relates to a device for the optimized circulation of mandrels, comprising a presentation and/or cooling table for mandrels, a lubricating station for the mandrels, in some cases an additional drying station for the lubrican...  
WO/2011/039942A1
A multi-roll mandrel mill in which "roll chock sections have been made compact" is a mandrel mill which comprises a plurality of grooved roll bodies as roll grooves which press down a pipe material, and which is provided with a plurality...  
WO/2011/039941A1
Disclosed are: a mandrel mill provided with a plurality of rolling stands, in which the rolling stands are provided with three grooved rolls, the three grooved rolls constitute a groove by the rolled surfaces, and when the diameter of th...  
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/2011/018956A1
Provided is an apparatus for adjusting a screw-down position by which an engagement failure of a leading end of a tubular member which is rolled by a three-roll type mandrel mill, or the like can be prevented. An apparatus (100) for adju...  
WO/2010/097232A1
Disclosed is a roll stand comprising at least two rolls (1) which are designed and arranged so as to form a pass for rolling rod-shaped or tube-shaped rolling stock (2) and so that the rolling stock passes in a rolling direction W during...  
WO/2010/082584A1
Disclosed are a lightweight hollow member, which is highly strong, at e.g., 780 MPa or greater, has complex shapes applicable to automotive components, is highly rigid, and has excellent impact characteristics, and a manufacturing device...  
WO/2010/073035A1
A method of construction of a tungsten carbide/TSP insert for hard facing a wear surface comprises the steps of forming a tungsten carbide body (12) in a mould. After the moulding step, a channel section slot (24) or pocket (24') is crea...  
WO/2009/141414A1
A rolling mill stand and related rolling mill for rolling rod-shaped bodies, even large in size, which meets the requirement of stiffness uniformity of the rolling mill stands in the transversal direction, all the hydraulic capsules bein...  
WO/2009/035106A1
Provided is a roll forming device, which is equipped with a forming roll capable of manufacturing such a mechanism simply and precisely as to input a rotating drive force to the forming roll. The roll forming device inputs the rotating d...  
WO/2009/030105A1
A manufacturing technique of seamless steel pipe comprises process steps as follows, producing a hollow blank pipe(1) with annular cup bottom(2) at one end by centrifugal casting, executing machinework on the inner and outer surface of t...  
WO/2008/146493A1
[PROBLEMS] To provide a mandrel mill or the like that attains not only enhancing of pipe draw ratio but also suppression of pinhole defect occurrence. [MEANS FOR SOLVING PROBLEMS] The first means is a mandrel mill equipped with multiple ...  
WO/2008/128417A1
A seamless steel tube four-roller-type heat sizing mill includes a sizing mainframe, a roller changing vehicle (1) and locking hydraulic cylinders (7). The sizing mainframe comprises a frame, level sizing roller groups and side standing ...  
WO/2008/126633A1
A process for manufacturing a seamless pipe, in which cracking at pipe end portions can be effectively prevented in the stretch rolling step by means of a mandrel mill. The process for manufacturing a seamless pipe is characterized by in...  
WO/2008/123121A1
A method for producing a seamless pipe in which a mandrel bar of the same outside diameter can be employed even when the target thickness of the pipe is different, and partial thickness can be suppressed effectively in the circumferentia...  

Matches 1 - 50 out of 2,130