| Patents for B21B 25 - Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group; Accessories or auxiliary means therefor (1,103) |
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| 12/21/2011 | CN102286308A 水基芯棒润滑剂 Water-based lubricant mandrel |
| 12/21/2011 | CN102284489A 用于限动芯棒式连轧管机的旋转芯棒装置 Rotating mandrel means for limiting movement of the mandrel MPM |
| 12/21/2011 | CN102284484A 斜轧机的芯棒预旋转机构 Oblique mandrel mill pre-rotation mechanism |
| 12/15/2011 | WO2011154133A1 Method for producing seamless pipes |
| 12/15/2011 | CA2800351A1 Method for producing seamless pipes |
| 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 | CN202070551U 具有四轴承的穿孔机顶杆止推小车 Puncher with a four-car thrust bearing mandrel |
| 12/14/2011 | CN102277221A 新型不锈钢挤管玻璃润滑剂 New stainless steel squeeze tube glass lubricant |
| 12/07/2011 | CN202061872U 芯棒专用夹持套瓦 Special mandrel holding sleeve tile |
| 12/07/2011 | CN101942685B 芯棒工件电镀轨道拖车 Electroplating track piece mandrel trailer |
| 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 |
| 12/07/2011 | CN101500719B 热轧用镀Cr芯棒的使用方法 Hot rolling Cr-plated mandrel use |
| 11/30/2011 | CN202052761U 一种皮尔格轧机机芯棒卡头盖板 One kind of Pilger mill head plate movement Stick Card |
| 11/23/2011 | CN102247991A Locking device for mandril thrust trolley of puncher |
| 11/23/2011 | CN102247990A Molybdenum-based tappet |
| 11/17/2011 | US20110277526 Mandrel Holder Head With Release Device |
| 11/16/2011 | CN102240889A Manufacturing method for continuously rolling seamless steel pipe by using hollow mandril |
| 11/16/2011 | CN102240678A Fast positioning device of core rod |
| 11/15/2011 | US8056797 Expandable mandrel for use in friction stir welding |
| 11/09/2011 | CN102233355A Technological process for adding retained mandrel to reducing rolling section of hot-rolled small-diameter seamless steel tube |
| 11/02/2011 | CN202021200U Removing tool of strips on steel sleeve surface for cold rolling |
| 10/12/2011 | CN202006215U Clamp of limiting trolley of Akourou mill train |
| 10/12/2011 | CN202006214U Connection structure for hydraulic cylinder and clamp of limiting bogie |
| 10/12/2011 | CN202006213U Rear end cover of restraint dolly of Accu-roll rolling mill set |
| 09/14/2011 | CN201969726U 一种延伸机石墨池拌料装置 An extension of the machine graphite pool spices 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 | CN201969723U 新型穿孔延伸一体机 The new perforations extend one machine |
| 09/09/2011 | WO2011107214A1 Hot work tool and method for producing same |
| 09/09/2011 | CA2793074A1 Method for producing a hot work tool |
| 09/08/2011 | DE102011010646A1 Warmwerkzeug und Verfahren zu seiner Herstellung Warm tool and process for its preparation |
| 08/31/2011 | CN201950063U 一种新型芯棒石墨润滑装置 A new graphite mandrel lubrication device |
| 08/24/2011 | EP1854561B1 Process for producing seamless pipe |
| 08/24/2011 | CN201940417U 轧机芯杆与芯棒连接装置 Mill core rod and rod connecting device |
| 08/24/2011 | CN101758074B Mandrel-holding device for tube mills |
| 08/18/2011 | WO2011099304A1 Lubricant for hot-rolling tools, and method for surface treatment of mandrel bar for use in producing seamless pipe by hot rolling |
| 08/10/2011 | CN201921885U 轧机锥形后端 Mill tapered rear end |
| 07/27/2011 | CN101448585B Method for production of seamless pipe, and oxidizing gas supply apparatus |
| 07/13/2011 | CN101653783B Top clamping device |
| 06/30/2011 | US20110154876 Rolling mill of rotating expander type for tubular bodies with tip-stabilizing system |
| 06/29/2011 | CN201880732U Swing mechanism of cold pilger mill |
| 06/23/2011 | WO2011050783A3 Method and device for the optimized circulation of rods in the production of a seamlessly hot-fabricated steel pipe according to the continuous pipe method |
| 06/22/2011 | CN201871534U Perforating plug |
| 06/22/2011 | CN102101126A Steel pipe perforating core rod device |
| 06/22/2011 | CN101163559B Manufacturing method of seamless pipe and cleaning equipment |
| 06/15/2011 | CN201862621U Rod supporting trolley device |
| 06/15/2011 | CN102091719A Limiting mandrel for mandrel pipe mill and manufacturing method thereof |
| 06/01/2011 | CN201848434U Centering device for cross piercing and helical tube rolling machine |
| 05/25/2011 | CN201841149U Core rod supporting device |
| 05/25/2011 | CN201841148U Base limit device for stopper mechanism of pipe mill |
| 05/18/2011 | CN102059252A Swing mechanism of cold-rolling pipe mill |
| 05/11/2011 | EP2318159A1 Method for producing a seamless steel pipe and rolling mill for performing the method |
| 05/11/2011 | EP2318158A1 Rolling mill of rotating expander type for tubular bodies with tip-stabilizing system |
| 05/11/2011 | CN201823750U Retained mandrel with wall uniformizing effect |
| 05/05/2011 | DE102009053166A1 Verfahren und Einrichtung zum optimierten Stangenumlauf bei der Herstellung eines nahtlos warmgefertigten Stahlrohres nach dem Rohrkontiverfahren Method and apparatus for optimized rod circulation in the manufacture of seamless hot rolled steel pipe according to the continuous mandrel rolling |
| 05/05/2011 | CA2779803A1 Method and device for the optimized circulation of rods in the production of a seamlessly hot-fabricated steel pipe according to the continuous pipe method |
| 05/04/2011 | CN102046305A Rolling mill of rotating expander type for tubular bodies with tip-stabilizing system |
| 05/04/2011 | CN102039312A Novel high-efficiency compact type hot rolling seamless steel pipe production process |
| 04/27/2011 | CN201809472U Electroplating track trailer for mandrel workpiece |
| 04/27/2011 | CN201807606U Two-section type overlaying composite mandrel of mandrel mill |
| 04/20/2011 | CN201799462U Three-roller centering device |
| 04/20/2011 | CN201799450U Mandrel surface graphite coating spraying device |
| 04/20/2011 | CN201799449U Locking ejector head device |
| 04/20/2011 | CN102019293A Hydraulic control system for replacing top of perforation machine |
| 04/13/2011 | CN102009070A Cooling water channel device for mandrel pipe mill |
| 04/06/2011 | CN201783507U Seamless steel pipe mandrel cooling system |
| 04/06/2011 | CN201783506U Rapid connecting device for plug and mandrel of large diameter cross-rolling pipe mill |
| 04/06/2011 | CN101426594B Process for producing stainless-steel pipe |
| 03/30/2011 | CN101994875A Method for manufacturing seamless copper pipe and rod core used for cold rolling mill |
| 03/23/2011 | CN201768739U Stop device for hot rolling tube mill |
| 03/23/2011 | CN201768738U Retained oil cylinder of pipe hot-rolling mill |
| 03/16/2011 | CN201760440U Macroporous series middle thick-walled capillary pipe plug |
| 03/16/2011 | CN101573191B Method of application of lubricating oil to mandrel bar, method of control of thickness of lubricating oil on mandrel bar, and method of production of seamless steel pipe |
| 02/23/2011 | CN201751022U Equipment for forming hollow anchor rods at one step by reducing hot rolling |
| 02/16/2011 | CN101977704A Method for cr-plating of mandrel bars, the mandrel bar, and process for producing seamless tubes using the method and the mandrel bar |
| 02/16/2011 | CN101974717A Mandril for copper alloy pipe planetary rolling mill and manufacturing method thereof |
| 02/16/2011 | CN101559436B Quick connecting device for punch top and mandril of perforator |
| 02/16/2011 | CN101486044B Method for producing restraint core rod of diameter above 330mm for tandem rolling tube |
| 02/09/2011 | EP2281642A1 METHOD FOR PLATING MANDREL BAR WITH Cr, MANDREL BAR, AND PROCESS FOR PRODUCING SEAMLESS PIPE USING THE METHOD AND THE MANDREL BAR |
| 02/09/2011 | CN101653782B Ejector rob trolley provided with rapidly replaced ejector rob |
| 01/26/2011 | CN201720247U Core rod cooling device used for seamless steel pipe production line |
| 01/26/2011 | CN201720246U Pipe mill mandrel bar horizontal shift apparatus |
| 01/19/2011 | CN201715861U Core rod preheating furnace |
| 01/19/2011 | CN201711360U Hot rolling pierced billet press |
| 01/19/2011 | CN101947551A Plug for large-hole series medium- and thick-wall capillaries |
| 01/13/2011 | US20110005286 Lubricant for hot forming |
| 01/12/2011 | EP1637245B1 Cr-PLATED MADNREL BAR FOR MANUFACTURING HOT SEAMLESS TUBE AND METHOD OF MANUFACTURING THE SAME |
| 01/12/2011 | CN101942685A Track trailer for mandril workpiece during electroplating |
| 01/12/2011 | CN101942610A Piercing plug for hot-rolled seamless steel pipe and processing technology thereof |
| 01/05/2011 | CN201692984U Floating core rod for seamless steel tube rolling mill |
| 12/29/2010 | CN101553327B Manufacturing method for seamless pipe |
| 12/22/2010 | CN201676879U Fluid power asynchronous selectively mounting device |
| 12/22/2010 | CN201676878U Ring roll cylindrical mandrel precision cold rolling pipe mill |
| 12/15/2010 | CN201669268U Puncher mandril follow-up supporting vehicle |
| 12/08/2010 | CN101905407A Producing process of large-diameter core rod for rolling of mandrel pipe mill |
| 12/08/2010 | CN101905244A Method for producing mandrel by utilizing 28NiCrMoV steel as raw material |
| 12/08/2010 | CN101653781B Perforation production new technique of hot rolling large-diameter steel pipe |
| 12/08/2010 | CN101410197B Mandrel holder head with release device |
| 11/24/2010 | CN201644523U Internal lubricating oil transportation device for high-speed cold mill |
| 11/24/2010 | CN201644493U Roll-over resistance skidding type mandril trolley |
| 11/17/2010 | CN201632480U Cold-rolling equipment for ultralong pipes |