| Patents for B21B 19 - Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work (1,478) |
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| 03/12/2014 | CN203470464U Pipe removing mold for punching |
| 03/12/2014 | CN203470463U Steel tube perforating machine |
| 03/12/2014 | CN103624082A Top-rod separating device for perforating seamless steel pipe |
| 03/05/2014 | CN102658300B Structure of open hydraulic cylinder device of three-roller centering unit |
| 03/05/2014 | CN102581016B Machining method for locally thickening steel pipe |
| 02/27/2014 | WO2014030692A1 Inner-surface control tool, plug, mandrel, hot-rolling mill, punching press, and draw bench |
| 02/27/2014 | WO2014030593A1 Plug for hot pipe manufacturing |
| 02/26/2014 | CN103599938A Four-roller mandrel pipe mill |
| 02/12/2014 | CN203426146U Punching trolley flange plate |
| 02/06/2014 | US20140033781 Method and device for producing a hollow metallic billet from a metallic billet |
| 02/06/2014 | DE102012107041A1 Verfahren und Vorrichtung zur Herstellung eines metallischen Hohlblockes aus einem metallischen Block Method and apparatus for producing a metallic hollow block made of a metallic block |
| 02/05/2014 | CN203417915U Core rod centering device for puncher |
| 02/05/2014 | CN203417913U Seamless pipe perforating machine top head cooling device |
| 02/05/2014 | CN103556084A Oil sleeve steel ball and manufacturing process thereof |
| 01/29/2014 | CN203408991U Automatic tube blank pushing device for tube mill |
| 01/29/2014 | CN103540797A Titanium alloy (Ti-6246) rolled tube and preparation method thereof |
| 01/22/2014 | CN203400927U Locking device for ejector rod trolley of perforator |
| 01/22/2014 | CN103521548A Method for manufacturing martensitic steel tube |
| 01/22/2014 | CN103521522A Cross wedge rolling precision forming method of axle shaft sleeve |
| 01/22/2014 | CN103521521A Concave roller type pipe skew rolling tension tube reducing technological method |
| 01/22/2014 | CN102703838B Production process for PSL-2 grade non-tempered N80 steel grade oil casing pipes |
| 01/15/2014 | CN203389953U Efficient energy-saving environment-friendly round steel punching device |
| 01/15/2014 | CN203389949U Steel billet pushing device of perforating machine |
| 01/15/2014 | CN103506384A Puncher |
| 01/08/2014 | EP2682494A2 Raw pipe of Fe-Ni Alloy and method for production thereof |
| 12/25/2013 | CN203356192U Sizing roller device |
| 12/25/2013 | CN203356191U Hollow pushing rods with reinforcing sleeve |
| 12/25/2013 | CN103464464A Method for producing seamless aluminum tubes |
| 12/25/2013 | CN102327896B Precision rolling method of seamless steel pipe and processing device thereof |
| 12/19/2013 | US20130333433 Method for producing seamless hot-rolled pipes in continuous pipe rolling mills |
| 12/18/2013 | CN203343166U Angle-adjustable roller device |
| 12/18/2013 | CN102489514B Cold-formed sectional steel rolling machine for skew roller |
| 12/12/2013 | WO2013183213A1 Manufacturing method for piercing plug |
| 12/12/2013 | US20130327107 Hot work tool and method for producing same |
| 12/12/2013 | DE102012022014B3 Verfahren zur Herstellung nahtloser Stahlrohre mit geringer Exzentrizität A process for producing seamless steel tubes with less eccentricity |
| 12/11/2013 | CN203329908U Gas injection device and tube blank cross piercing system |
| 12/11/2013 | CN103433300A Steel billet pushing device for perforating machine |
| 12/11/2013 | CN103433299A Automatic tube blank pushing device for tube rolling mill |
| 12/11/2013 | CN103433285A Core rod centering device for perforating machine |
| 12/11/2013 | CN103433281A Ejector header cooling device of seamless tube perforating machine |
| 12/10/2013 | US8601852 Method of manufacturing seamless pipe and tube |
| 12/10/2013 | US8601844 Multi-roll mandrel mill and method of producing seamless tubes |
| 11/27/2013 | CN203304278U Drilling device of blank pipe |
| 11/27/2013 | CN203304276U Multi-roll cold rolling mill |
| 11/20/2013 | CN103394526A Efficient, energy-saving and environment-friendly round steel piercing device |
| 11/07/2013 | DE102012008803A1 Method for rolling hollow cylinder slug in cross-rolling mill e.g. planet cross-rolling mill, involves forming mandrel bar portion in transforming zone, whose cross section is smaller than cross section of another mandrel bar portion |
| 11/06/2013 | CN102039313B Method for producing large-diameter seamless steel pipe for gas cylinder |
| 11/06/2013 | CN101439350B Method for producing seamless steel pipe for producing gas cylinder with heavy caliber for hauled vehicle |
| 10/31/2013 | WO2013161489A1 Plug used in piercing machine |
| 10/31/2013 | WO2013161177A1 Facility for producing piercing plug |
| 10/31/2013 | WO2013161176A1 Method for manufacturing piercing plug |
| 10/31/2013 | WO2013161175A1 Method for producing piercing plug |
| 10/31/2013 | US20130283879 Ni BASE ALLOY PIPE STOCK AND METHOD FOR MANUFACTURING THE SAME |
| 10/31/2013 | DE10308849B4 Verfahren zur umformenden Herstellung form- und maßgenauer, rotationssymmetrischer Hohlkörper und Vorrichtung zur Durchführung des Verfahrens A process for forming production form and dimensionally accurate, rotationally symmetrical hollow body and apparatus for carrying out the method |
| 10/30/2013 | EP2656935A1 Process for manufacture of seamless steel pipe |
| 10/30/2013 | EP2656931A1 PRODUCTION METHOD FOR ROUND STEEL BAR FOR SEAMLESS PIPE COMPRISING HIGH Cr-Ni ALLOY, AND PRODUCTION METHOD FOR SEAMLESS PIPE USING ROUND STEEL BAR |
| 10/29/2013 | CA2572156C Fe-ni alloy pipe stock and method for manufacturing the same |
| 10/24/2013 | WO2013157351A1 Round billet for seamless metal tube and method for producing seamless metal tube |
| 10/24/2013 | WO2013157312A1 Method for producing plug for heat formed pipe |
| 10/23/2013 | CN103357660A Steel pipe sizing mill capable of adjusting pipe diameter size |
| 10/17/2013 | WO2013153878A1 Plug used in piercing machine and plug regeneration method |
| 10/17/2013 | US20130269407 Method for producing seamless steel tube/pipe |
| 10/16/2013 | EP2650060A1 Method for manufacturing seamless pipe |
| 10/10/2013 | US20130263436 PRODUCTION METHOD OF ROUND BAR FOR SEAMLESS TUBE MADE OF HIGH Cr-HIGH Ni ALLOY, AND PRODUCTION METHOD OF SEAMLESS TUBE USING ROUND BAR |
| 10/09/2013 | CN103341491A Method for manufacturing titanium alloy oil well pipe with medium thick wall |
| 10/02/2013 | CN102357531B Composite roll forming process of thick-wall deep-groove ring member |
| 10/01/2013 | US8544306 Plug, piercing-rolling mill, and method of producing seamless tube by using the same |
| 09/25/2013 | CN103316917A Three-roller skew continuous rolling mill for producing tubes or bars |
| 09/19/2013 | US20130239638 Super large diameter longitudinal welded pipe forming machine set |
| 09/19/2013 | US20130239637 Process for manufacturing seamless steel pipe, hollow spring utilizing seamless steel pipe |
| 09/11/2013 | EP2636462A1 Method of detecting defects in rotary piercing, seamless pipe manufacturing method |
| 09/11/2013 | CN203184345U Spindle structure of three-roller centering device |
| 09/11/2013 | CN203184334U Three-roller connecting and adjusting structure of piercer holding unit roller device |
| 09/11/2013 | CN103290410A Laser cladding manufacturing method of seamless steel tube piercing plug |
| 09/11/2013 | CN103286156A Oblique rolling molding process of double-layered steel pipe |
| 09/04/2013 | CN203170701U Four-roll type sizing-sinking mill |
| 09/04/2013 | CN103282135A Method of detecting defects in rotary piercing, seamless pipe manufacturing method |
| 09/04/2013 | CN103272845A Hot rolling process of small-bore ultra-thin-wall seamless steel tube |
| 08/28/2013 | CN103269809A Process for manufacture of seamless steel pipe |
| 08/28/2013 | CN103269808A Production method for round steel bar for seamless pipe comprising high cr-i alloy, and production method for seamless pipe using round steel bar |
| 08/21/2013 | CN203140428U Ejection rod of perforating unit |
| 08/21/2013 | CN203140427U Ejection head of perforating unit |
| 08/21/2013 | CN103252348A Hot rolling forming method of stainless steel seamless steel tube |
| 08/15/2013 | US20130205856 Apparatus and method for forming product having asymmetric cross-section using ring rolling process |
| 08/14/2013 | CN203124416U Reversible piercer plug centering roller device |
| 08/14/2013 | CN203124415U Adjustable puncher |
| 08/14/2013 | CN103249503A Method for manufacturing seamless pipe |
| 08/14/2013 | CN103240274A Piercing plug device of piercer, piercer and production method of seamless steel tubes |
| 08/07/2013 | CN102327895B Cooling device in piercer top |
| 07/31/2013 | CN203091410U Pressure-equalizing piercing plug |
| 07/25/2013 | WO2013107845A1 Rolling stand with non skewed working rolls with a roll preloading device |
| 07/24/2013 | CN103212578A Finishing rolling method and device of oblique axial rolling cored steel |
| 07/17/2013 | CN203061572U Device for replacing guide plate of perforating machine |
| 07/17/2013 | CN101380641B Device for skew rolling the tubular or rod shaped rolling piece |
| 07/10/2013 | CN103191922A Four-roll sizing and reducing mill |
| 06/26/2013 | CN102284515B Added lifting receiving hopper of puncher |
| 06/26/2013 | CN102172625B Seamless steel pipe three-roller skew tandem rolling production method and apparatus thereof |
| 06/26/2013 | CN101985132B Method for producing thermally tandem-rolled seamless steel pipes |
| 06/25/2013 | USRE44308 Method for manufacturing seamless pipes or tubes |
| 06/19/2013 | CN203002753U Guide plate with double-layer structure |