| 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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| 04/24/2012 | US8161788 Method for producing workpieces |
| 04/19/2012 | US20120090372 Method and device for stretch-flow forming |
| 04/18/2012 | CN202192098U Built-in three roller guide device |
| 04/18/2012 | CN202192085U Inner cooling device for plug of puncher |
| 04/18/2012 | CN202192083U 无缝钢管三辊热轧机锁紧开启机构 Three-roll rolling mill seamless steel locking opening mechanism |
| 04/18/2012 | CN101912878B Open-rack three-roller oblique rolling extender |
| 04/05/2012 | US20120083345 High-lift system of an aircraft |
| 04/04/2012 | CN102397878A Triple-roller fixed reducing set capable of quickly changing roller rack |
| 03/28/2012 | CN202174112U 新型穿孔机万向联轴器 The new puncher universal coupling |
| 03/21/2012 | CN202169278U 两辊冷轧管机 Two-roll cold rolling mill |
| 03/21/2012 | CN102380508A Improved perforating trolley for seamless steel tubes |
| 03/14/2012 | CN202162215U 穿孔机的受料槽及剔料装置 By trough and tick feeding device punch machine |
| 03/07/2012 | CN102366767A Production method of steel pipe |
| 02/22/2012 | CN102357539A Built-in three-roller guiding device |
| 02/22/2012 | CN102357531A Composite roll forming process of thick-wall deep-groove ring member |
| 02/15/2012 | EP1795274B1 METHOD FOR HOT WORKING OF Cr-CONTAINING STEEL |
| 02/08/2012 | EP1060802B1 Piercing mill |
| 02/08/2012 | CN202137187U 穿孔机后台托辊升降结构 Puncher background roller lifting structure |
| 02/08/2012 | CN202137186U 菌式穿孔机轧辊轴与花键套装配结构 Bacteria piercing machine roller shaft spline suit with structure |
| 02/08/2012 | CN202137185U 穿孔机用导板 Puncher with guides |
| 02/08/2012 | CN202137184U 三辊斜轧管机的快速提升油缸 Three-roll cross rolling machine Quick lift cylinder |
| 02/08/2012 | CN102343364A Three-roller rotary sizing mill |
| 02/08/2012 | CN102343363A Positioning system for three-roller fastening device of puncher |
| 02/08/2012 | CN102343362A Perforating and extending integrated machine |
| 02/08/2012 | CN102343361A Composite perforating machine |
| 02/08/2012 | CN102343360A Composite roll piercing mill for producing large-bore seamless steel tube |
| 02/01/2012 | CN202129268U 无缝钢管定径机 Seamless steel pipe sizing mill |
| 02/01/2012 | CN102341193A Plug, piercing rolling apparatus and method of manufacturing seamless tube using the same |
| 02/01/2012 | CN102337472A Heat treatment method for piercing point of seamless pipe |
| 01/31/2012 | US8104316 Piercing mill |
| 01/26/2012 | US20120017662 Method for producing seamless steel tube and production facility therefor |
| 01/25/2012 | CN102327897A Tappet centering device for perforating machine |
| 01/25/2012 | CN102327896A Precision rolling method of seamless steel pipe and processing device thereof |
| 01/25/2012 | CN102327895A Cooling device in piercer top |
| 01/18/2012 | CN102319764A Method for manufacturing stainless steel seamless tube |
| 01/18/2012 | CN102319739A Rolling angle adjusting device for two-roller skew rolling piercing mill |
| 01/18/2012 | CN101142304B Two-pack type anti-seizing agent for hot plastic working and method for producing seamless pipe using the same |
| 01/12/2012 | WO2012003691A1 Planetary pipe rolling mill and planetary rolling method for copper alloy pipe |
| 01/11/2012 | EP2404680A1 Plug, piercing rolling apparatus and method of manufacturing seamless tube using the same |
| 01/11/2012 | CN202105843U Hydraulic pull type square tube roll mill |
| 01/04/2012 | CN202097184U Titanium tube curve surface rolling mill |
| 01/04/2012 | CN202097183U Spinning-type skew rolling billet mill |
| 01/04/2012 | CN202097182U Novel composite puncher |
| 01/04/2012 | CN102304613A Steel pipe for supplemental restraint system and manufacture method thereof |
| 01/04/2012 | CN102303048A Continuous piercing method for seamless steel tube |
| 01/04/2012 | CN101935808B 130ksi steel-grade low-temperature drill rod with high toughness and corrosion resistance and manufacturing method thereof |
| 01/04/2012 | CN101502845B Corner rolling technique for bar material |
| 12/28/2011 | CN202087597U 一种张力减径机的可调导辊机架装置 Is a tension reducer adjustable guide roller rack unit |
| 12/28/2011 | CN202087579U 钼基顶头 Molybdenum-based head |
| 12/28/2011 | CN202087578U 双线冷轧管机 Wire cold rolling mill |
| 12/28/2011 | CN102296239A 一种高强度抗挤毁石油套管管柱及其制造方法 A high-strength collapsing oil casing string and its manufacturing method |
| 12/28/2011 | CN102294456A 一种离心坯斜轧双金属复合无缝钢管的制造方法 A centrifugal billet cross rolling bimetallic composite seamless steel pipe manufacturing methods |
| 12/28/2011 | CN101716598B 一种顶杆循环的大口径钢管生产工艺 One kind of ejector cycle of large-diameter pipe production process |
| 12/27/2011 | US8082768 Piercing and rolling plug, method of regenerating such piercing and rolling plug, and equipment line for regenerating such piercing and rolling plug |
| 12/21/2011 | CN102284515A 穿孔机增设升降受料槽 Puncher additional lift by the trough |
| 12/21/2011 | CN102284514A 一种穿孔机的受料槽及剔料装置 By tick feeding trough and a puncher's device |
| 12/21/2011 | CN102284487A 多机架二辊减径机组 Multi-unit rack two roll-reducing |
| 12/21/2011 | CN102284486A 一种热轧无缝钢管制造工艺 A hot rolled seamless steel pipe manufacturing process |
| 12/21/2011 | CN102284485A 一种无缝钢管制造工艺 One kind of seamless steel pipe manufacturing process |
| 12/21/2011 | CN101905243B Seamless steel tube reducing process |
| 12/20/2011 | US8079243 Plug, method of expanding inside diameter of metal pipe or tube using such plug, method of manufacturing metal pipe or tube, and metal pipe or tube |
| 12/14/2011 | CN202070561U 顶杆小车调节装置 Rams car adjusting device |
| 12/14/2011 | CN202070552U 一种双圆弧形斜轧扩径顶头 A two arc-shaped cross rolling flaring head |
| 12/14/2011 | CN102274870A 不锈钢荒管的生产工艺 Shortage of stainless steel pipe production process |
| 12/14/2011 | CN101905242B 一种辊道升降比例同步液压控制系统 One kind of roller synchronous lifting hydraulic proportional control system |
| 12/07/2011 | CN202061888U 一种穿孔机主减速轴 One kind of puncher main gear shaft |
| 12/07/2011 | CN202061878U 一种斜轧管机转鼓调整装置 In a slant pipe rolling mill drum adjusting device |
| 12/07/2011 | CN102268614A 耐-20℃低温用165ksi钢级钻杆及其制造方法 -20 ℃ low temperature resistant 165ksi grade drill pipe and its manufacturing method |
| 12/07/2011 | CN101791628B 一种热轧穿孔机组的冷却槽装置 Cooling tank apparatus for hot punch unit |
| 11/29/2011 | US8065900 Method of manufacturing plug used to pierce and roll metal material, method of manufacturing metal pipe and plug used to pierce and roll metal material |
| 11/23/2011 | CN102247989A Production process for four-roll planetary hot-rolled tube machine |
| 11/23/2011 | CN102247988A Method for producing gas cylinder pipe with diameter of phi610 to 720 for natural gas underground storage well |
| 11/16/2011 | CN102240679A Transmission of mandrel thrust trolley of perforating machine |
| 11/09/2011 | CN1492788B Method and apparatus for manufacturing tubes by rolling |
| 11/09/2011 | CN102233355A Technological process for adding retained mandrel to reducing rolling section of hot-rolled small-diameter seamless steel tube |
| 10/18/2011 | US8037732 Method of producing seamless metal tube and punch for use therein |
| 09/28/2011 | CN101708511B Method for manufacturing pure titanium seamless tubes |
| 09/28/2011 | CN101579702B New technique for producing high alloy steel high-end pipe by adopting cross rolling elongation technology |
| 09/21/2011 | CN201978938U 新型穿孔机 The new punching machine |
| 09/21/2011 | CN102189108A Rolling body guide, receiving section, rolling tool and associated exchange method |
| 09/20/2011 | US8020421 Pusher device for piercing and rolling and method of manufacturing seamless pipe or tube using the same |
| 09/14/2011 | CN201969733U 一种穿孔机推料汽缸缓冲装置 One kind of puncher pusher cylinder cushioning device |
| 09/14/2011 | CN201969725U 一种穿孔机小车芯棒定位装置 One kind of puncher car mandrel positioning device |
| 09/14/2011 | CN201969724U 一种定径机安全连接装置 A secure connection means a given mill |
| 09/14/2011 | CN201969723U 新型穿孔延伸一体机 The new perforations extend one machine |
| 09/14/2011 | CN102179681A Pipe mold manufacturing process adopting continuous-casting blank to forge and roll rough blank periodically |
| 09/07/2011 | CN102172626A Hot rolling production method for super 13Cr oil pipes with diameter of 48 to 89 millimeters |
| 09/07/2011 | CN102172625A Seamless steel pipe three-roller skew tandem rolling production method and apparatus thereof |
| 09/07/2011 | CN101850364B Three-roller planetary rolling method for rolling brass tube |
| 08/31/2011 | CN102166581A Micro tension-reducing process for perforated hollow billets |
| 08/30/2011 | US8006528 Method for producing duplex stainless steel pipe, method for straightening, method for regulating strength, and method for operating straightener |
| 08/03/2011 | EP1901862B1 Device for production of a seamless hollow body from steel |
| 07/27/2011 | CN102133581A Nut locking device and method for seamless steel tube sizing mill |
| 07/06/2011 | CN201889313U Four-roller planetary hot pipe mill |
| 07/06/2011 | CN201889312U Open frame three-roller skew rolling mill |
| 06/30/2011 | US20110154876 Rolling mill of rotating expander type for tubular bodies with tip-stabilizing system |
| 06/29/2011 | CN102107213A Production process of petroleum pipe |
| 06/22/2011 | EP1894641B1 Roll for rolling seamless pipes |
| 06/22/2011 | CN201871540U Vertical cone epicyclic gearbox of sizing mill |
| 06/22/2011 | CN201871534U Perforating plug |