| 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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| 03/04/2015 | EP2842645A1 Plug used in piercing machine |
| 02/25/2015 | EP2839891A1 Method for producing plug for heat formed pipe |
| 02/19/2015 | DE102009053166B4 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 |
| 02/18/2015 | EP2837434A1 Plug used in piercing machine and plug regeneration method |
| 02/12/2015 | DE102013110725B3 Lochdorn mit verbesserter Standzeit zur Herstellung nahtloser Rohre Piercer with improved life for manufacturing seamless tubes |
| 02/04/2015 | CN104324941A 一种穿孔顶杆装置及其使用方法 An ejector apparatus and method of use perforated |
| 01/28/2015 | CN204122461U 一种大型两辊冷轧管机的芯棒杆 A large, two-roll cold rolling mill of the mandrel rod |
| 01/21/2015 | CN204107984U 穿制钢管专用顶头 Wear special head pipe system |
| 01/21/2015 | CN102806230B 一种两辊往复式轧管机用浮动芯棒轧制铜管工艺及设备 A two-roll rolling machine with reciprocating floating brass mandrel rolling process and equipment |
| 01/14/2015 | CN204093835U 一种穿孔机顶杆机构 One kind of puncher jack mechanism |
| 01/14/2015 | CN104284741A 穿孔轧制用顶头的制造方法 Piercing and rolling method for producing the plug |
| 01/07/2015 | CN204074705U 一种用于冷却无缝钢管穿孔顶杆的装置 A cooling device for seamless steel perforated mandrel |
| 01/07/2015 | CN204074704U 转盘角度调整及锁紧装置 Wheel angle adjustment and locking devices |
| 01/07/2015 | CN204074703U 无缝钢管穿孔顶杆 Seamless steel perforated mandrel |
| 01/07/2015 | CN204074702U 一种外异型管冷轧模具 Cold-mold with Exterior Pipes |
| 01/07/2015 | CN104271274A 穿孔轧制用芯棒的制造方法 Piercing and rolling method for producing a mandrel bar |
| 12/31/2014 | CN204052365U 冷轧机的润滑输油装置 Lubricating oil unit cold rolling mill |
| 12/31/2014 | CN204052364U 一种限动齿条与限动芯棒的连接装置 A connection device and retained mandrel movable rack limit |
| 12/31/2014 | CN104254407A 用于穿孔机的顶头 Head for the puncher |
| 12/31/2014 | CN103071680B 一种顶管机组 One kind of pipe jacking machine |
| 12/24/2014 | CN104245170A 穿孔轧制用顶头的制造设备 Piercing and rolling using the plug manufacturing apparatus |
| 12/24/2014 | CN104245167A 用于穿孔机的顶头和顶头的再生方法 Regeneration method puncher's head and head for |
| 12/24/2014 | CN104226688A 转盘角度调整及锁紧装置 Wheel angle adjustment and locking devices |
| 12/17/2014 | CN204018368U 一种穿孔机顶杆装置及其穿孔机 One kind of puncher ejector device and puncher |
| 12/17/2014 | CN104213069A 一种穿孔顶头及其表面处理方法 An immediate and surface treatment methods perforation |
| 12/17/2014 | CN104209324A 穿孔顶杆装置及其使用方法 Piercing ejector means and method of use |
| 12/10/2014 | CN203991665U 一种大型侧装料两辊冷轧管机的芯棒杆夹紧装置 Side loading a large, two-roll cold rolling mill of the mandrel rod clamping device |
| 12/10/2014 | CN203991664U 一种顶头 One kind of head |
| 12/10/2014 | CN101439362B 用于制管方法的芯棒或芯棒杆 Mandrel or mandrel rod tube method for |
| 12/09/2014 | US8904839 Method of and rolling mill for making seamless steel pipe |
| 10/21/2014 | US8863564 Lubricant composition for hot metal working and method of hot metal working using the same |
| 10/08/2014 | EP2786813A1 Tool for piercing mill |
| 09/10/2014 | EP2774695A1 Boring device, plug used in boring device, and method for manufacturing steamless steel pipe |
| 08/13/2014 | CN103978037A 辊轧机 Rolling mill |
| 08/06/2014 | CN203750995U 一种三辊穿孔机顶头 A three-roll piercing machine head |
| 08/06/2014 | CN203750994U 可提高轧辊利用率的顶管机可调辊模 Can improve the utilization of the roll jacking machine adjustable roller die |
| 08/06/2014 | CN203750992U 二辊四机架连轧机组 Two roll four rack strip mill |
| 08/06/2014 | CN103974787A 穿孔轧制用工具 Rolling piercing tool |
| 08/06/2014 | CN103962379A 一种均压穿孔顶头 One kind of equalizing piercing plug |
| 07/30/2014 | CN203737710U Mpm机组顶杆结构 Mpm ejector unit structure |
| 07/23/2014 | CN203725491U 一种轧管机芯棒支撑装置 One kind of rolling movement of the rod supporting device |
| 07/23/2014 | CN203725490U 一种轧管机限动冷却装置 One kind of pipe rolling mill stopper cooling device |
| 07/16/2014 | CN203711473U 一种冷轧工艺用的芯棒 One kind of cold rolling process with the mandrel |
| 07/09/2014 | CN203695602U 一种减径机棒芯装置 One kind of reducing mill cob device |
| 07/09/2014 | CN103917308A 穿孔装置、穿孔装置所使用的芯棒以及无缝钢管的制造方法 Mandrel piercing means piercing means used and the method of manufacturing a seamless steel pipe |
| 07/02/2014 | CN203678845U 分段加工处理热连轧细长芯棒 Hot rolling processing segment elongated mandrel |
| 07/02/2014 | CN203678844U 一种表面强化无缝钢管轧机穿孔顶头 A surface piercing plug strengthen seamless pipe mill |
| 07/02/2014 | CN203678841U 一种用于轧制钢管的轧制设备 A rolling steel rolling equipment |
| 07/02/2014 | CN103894419A 一种穿孔顶头快速连接装置 One kind of piercing plug quick connect device |
| 06/18/2014 | CN102601117B Three-roll plug steadier |
| 06/11/2014 | CN203635620U 松棒机转角调整装置 Loose stick machine swivel adjustment device |
| 06/11/2014 | CN103849746A Thermal treatment process for 40CrNiMoA core rod and 40CrNiMoA core rod obtained through process |
| 06/11/2014 | CN102341193B Plug, piercing rolling apparatus and method of manufacturing seamless tube using the same |
| 06/04/2014 | CN203621095U 钢管穿孔小车高压水管旋转装置 Perforated steel trolley high pressure hose rotary device |
| 05/28/2014 | CN203610412U 适用于连轧机组的芯棒支撑机架 Suitable for rolling mandrel support rack unit |
| 05/21/2014 | CN103805884A 一种热轧无缝钢管用芯棒 A hot rolled seamless steel mandrel |
| 05/21/2014 | CN103801559A 一种轧管芯棒制作方法及其轧制管芯棒的装置 A method of making pipe rolling and rolling tube mandrel mandrel means |
| 05/14/2014 | CN203591996U 一种顶头 One kind of head |
| 05/14/2014 | CN203591995U 无缝钢管高效穿孔顶头 Seamless Steel efficient piercing plug |
| 05/14/2014 | CN103785686A 一种二辊四机架连轧机组 A two-roll four rack strip mill |
| 05/14/2014 | CN102463259B 冷轧管机回转机构的动力传动装置 The power transmission unit cold rolling mill rotation mechanism |
| 05/14/2014 | CN102463258B 冷轧管机回转机构的安装支承座与传动箱的配合结构 Cold rolling mill complex structure mounted slewing mechanism and gearbox bearing seat |
| 05/07/2014 | CN203578352U 一种无缝钢管穿孔脱顶杆装置 One kind of seamless steel perforated off ejector means |
| 05/07/2014 | CN203578351U 穿孔机顶杆线外全水冷装置 Puncher ejector cooling device outside the line of the whole |
| 05/07/2014 | CN103769794A 一种无缝钢管轧机穿孔顶头表面强化方法 One kind of rolling seamless steel pipe piercing plug surface hardening methods |
| 05/07/2014 | CN102355961B 无缝钢管用顶头输送设备 Seamless plug conveying equipment |
| 04/30/2014 | CN203565472U Mandrel supporting device for rolling pipe fitting |
| 04/23/2014 | CN203556639U Core rod locking mechanism |
| 04/23/2014 | CN203556638U Split type transfer device for mandrels |
| 04/16/2014 | CN103722017A Rotating angle adjusting device for mandrel bar loosening mill |
| 04/16/2014 | CN103722016A Oblique pipe rolling mill inlet platform |
| 04/16/2014 | CN102658296B Mill thrust car with online automatically changeable mandril and automatic change method of mandril |
| 03/26/2014 | CN203494889U Continuous mill core rod extension rod |
| 03/26/2014 | CN103658186A Mandrel supporting rack suitable for contentious rolling unit |
| 03/26/2014 | CN103658185A Efficient piercing plug for seamless steel pipes |
| 03/26/2014 | CN103658184A High-strength seamless steel pipe piecing plug |
| 03/20/2014 | WO2014041787A1 Plug for rolling seamless steel pipe, method for manufacturing said plug, and method for manufacturing seamless steel pipe in which said plug is used |
| 03/19/2014 | CN103639204A Core rod for cold rolling technology |
| 03/12/2014 | CN203470465U Punching plug movable joint |
| 03/12/2014 | CN103624082A Top-rod separating device for perforating seamless steel pipe |
| 03/06/2014 | WO2014034376A1 Piercing plug and method for manufacturing piercing plug |
| 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 |
| 02/19/2014 | CN203437410U Perforated molybdenum piercing mandrel structural assembly |
| 02/19/2014 | CN103586283A Locking mechanism for mandrel |
| 02/12/2014 | EP2694227A1 Mandrel conveying device for a tube rolling mill |
| 02/12/2014 | CN103567225A Mandrel cooling device |
| 02/05/2014 | CN203417917U Water-blowing device of pipe mill graphite core rod |
| 02/05/2014 | CN203417916U Graphite lubricating and spraying system of pipe mill core rod |
| 02/05/2014 | CN203417915U Core rod centering device for puncher |
| 02/05/2014 | CN203417914U Retreating device of seamless steel pipe rolling machine |
| 02/05/2014 | CN203417913U Seamless pipe perforating machine top head cooling device |
| 01/30/2014 | WO2014017372A1 Seamless metal tube fabrication method, mandrel mill, and auxiliary tools |
| 01/23/2014 | WO2014013963A1 Piercing plug |
| 01/23/2014 | CA2875456A1 Piercing plug |
| 01/22/2014 | CN203400927U Locking device for ejector rod trolley of perforator |
| 01/22/2014 | CN103521525A Mandrel operating device for tube rolling mill |
| 01/22/2014 | CN103521524A Combined ejecting head |
| 01/22/2014 | CN103521523A Mandrel extension rod of tandem rolling machine |
| 01/22/2014 | CN102463257B Automatic core-rod clamping and placing device for core-rod revolving mechanism of pipe cold-rolling mill |