| 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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| 06/05/2013 | CN103131966A Steel tube piercing point and preparation method thereof |
| 05/22/2013 | CN202943078U Tool preventing core bar from moving |
| 05/22/2013 | CN101646505B Process for producing plug for use in piercing/rolling raw metallic material, process for producing metallic tube, and plug for use in piercing/rolling raw metallic material |
| 05/10/2013 | WO2013065780A1 Boring device, plug used in boring device, and method for manufacturing steamless steel pipe |
| 05/10/2013 | CA2853758A1 Piercing apparatus, plug used for piercing apparatus, and method for producing seamless steel pipe |
| 05/08/2013 | CN202921645U Cold-rolling mill coil rod structure |
| 05/08/2013 | CN202921644U Scratch preventing mandrel for cold reducing mill |
| 05/08/2013 | CN103084392A Cooling device of seamless steel pipe puncher roof |
| 05/01/2013 | EP2585235A2 Process for hot-rolling metallic hollow bodies and corresponding hot-rolling mill |
| 05/01/2013 | CN103071680A Pipe jacking machine unit |
| 04/25/2013 | US20130098128 Process for hot-rolling metallic hollow bodies and corresponding hot-rolling mill |
| 04/24/2013 | CN202893813U Fluid lubrication mandrel of pipe mill |
| 04/24/2013 | CN202893812U Core rod blanking stand |
| 04/24/2013 | CN202893811U Pressure plate type core rod pre-perforating mechanism |
| 04/24/2013 | CN202893810U Mandrel holding piercing plug |
| 04/24/2013 | CN102247991B Locking device for mandril thrust trolley of puncher |
| 04/17/2013 | EP2580003A1 Method for producing seamless pipes |
| 04/17/2013 | CN202879158U Wheel of bar carriage |
| 04/17/2013 | CN103042036A Hot rolling repair machine for pipeline |
| 04/03/2013 | CN202845440U Tube rolling machine core bar positioning device |
| 04/03/2013 | CN103025445A Method for producing seamless pipes |
| 04/03/2013 | CN103008356A Overload protection device of rod stripping machine |
| 04/03/2013 | CN103008351A Ejector rod pushing equipment for perforating machine |
| 04/03/2013 | CN103008350A Turnable puncher top centering roll device |
| 04/03/2013 | CN103008349A Core rod clamping and feeding mechanism |
| 03/27/2013 | CN202824149U Puncher outlet table two-section ejecting mandril bogie driving device |
| 03/27/2013 | CN202824109U One time piercing head for universal roll piercing mill |
| 03/27/2013 | CN202824108U Mandrel-embracing shaft structure |
| 03/27/2013 | CN202824107U Combined-type thrust and stop linkage mechanism |
| 03/20/2013 | CN202803751U Perforating plug |
| 03/20/2013 | CN202803750U Upper ejector roller for pre-rotation of ejector rod |
| 03/20/2013 | CN102974616A Positioning locking mechanism of mandrel block |
| 03/13/2013 | CN102971094A Process for hot-rolling metallic hollow bodies and corresponding hot-rolling mill |
| 03/13/2013 | CN102962256A Mandrel trolley and mandrel replacing device |
| 03/13/2013 | CN102962255A Automatic core rod locking device |
| 03/13/2013 | CN102962254A Steel pipe hot piercing end |
| 03/13/2013 | CN101977704B Method for cr-plating of mandrel bars, the mandrel bar, and process for producing seamless tubes using the method and the mandrel bar |
| 03/06/2013 | CN202762729U Core rod retaining device |
| 03/06/2013 | CN202762728U Guide disc horizontal adjustment control device of pipe mill |
| 03/06/2013 | CN102950151A Method and device for producing a cold pilgered pipe |
| 03/06/2013 | CN102950150A Method and device for producing a cold pilgered pipe |
| 02/27/2013 | CN202752316U Cooling water jacket for puncher ejecting head |
| 02/27/2013 | CN202752315U Core rod support device capable of moving out of steel tube rolling lines quickly |
| 02/20/2013 | CN202744294U Transmission device of mandrel manipulator |
| 02/13/2013 | CN202725618U Leveling core rod in steel pipe |
| 02/13/2013 | CN202725617U Composite alloy plug |
| 02/13/2013 | CN202725616U Seamless steel pipe piercing plug |
| 02/13/2013 | CN202725615U Integrated composite alloy plug |
| 02/13/2013 | CN202725614U Steel pipe piercing plug |
| 02/13/2013 | CN102921744A Automatic core rod supporting roller adjusting system for hot-rolled seamless steel tube production line |
| 02/13/2013 | CN102921732A Meothod for producing piercing and rolling plug and method of regenerating such piercing and rolling plug |
| 01/30/2013 | CN202700948U Guiding device for mandril push rod of pipe jacking machine |
| 01/30/2013 | CN102896151A Push rod push-and-pull device |
| 01/23/2013 | CN202683601U Core bar chuck head fine adjustment mechanism |
| 01/23/2013 | CN202683600U High-efficient perforating machine back stage |
| 01/16/2013 | CN202667246U Rolling mill core rod retreating anti-dropping limit guide device |
| 01/16/2013 | CN102873101A Mandrel support device capable of being quickly moved out of steel pipe rolling line |
| 01/10/2013 | US20130008216 Lubricant for hot-rolling tools, and surface treatment method for mandrel bar for use in producing hot rolling seamless tubes |
| 01/09/2013 | EP2542361A1 Hot work tool and method for producing same |
| 01/09/2013 | CN202655335U Large-diameter high-density molybdenum alloy top |
| 01/09/2013 | CN102861769A Bidirectional hot centering machine for round pipe billets |
| 01/02/2013 | CN202638865U Core rod locking device |
| 12/26/2012 | EP2537915A1 Lubricant for hot-rolling tools, and method for surface treatment of mandrel bar for use in producing seamless pipe by hot rolling |
| 12/26/2012 | CN202621556U Fixing structure for mandril dolly |
| 12/26/2012 | CN101850363B Technology and device for forming hollow anchor stock in one step through reduction (phi 40-phi 50) hot rolling |
| 12/25/2012 | US8336358 Wire stretching device |
| 12/19/2012 | CN202606496U Cold-rolling pipe mill with automatic fuel injection device structure |
| 12/19/2012 | CN202606495U Pneumatic centering machine of hot rolled seamless tube blank |
| 12/19/2012 | CN202606494U Regulating device of small opening of centering roll |
| 12/19/2012 | CN202606493U Core rod trolley mechanism of cold pilger mill |
| 12/12/2012 | EP2532449A2 Device and method for rolling hollow blanks |
| 12/12/2012 | CN202591217U Feeding mechanism for three-roller reducing mill |
| 12/05/2012 | CN202580451U Ship oil path protection device and mandrel for processing protection sleeve |
| 12/05/2012 | CN102806230A Floating core rod rolling copper pipe process and equipment for two-roll reciprocating-type pipe mill |
| 12/05/2012 | CN101716599B High-speed rack transmission device of mandril thrust trolley of puncher |
| 11/21/2012 | CN102240889B Manufacturing method for continuously rolling seamless steel pipe by using hollow mandril |
| 11/15/2012 | DE102007037736B4 Dorn oder Dornstange für ein Rohrherstellungsverfahren und Verwendung solch eines Dorns oder solch einer Dornstange Mandrel or mandrel rod for a pipe manufacturing process and use of such a mandrel or such a mandrel |
| 11/14/2012 | CN202527465U Lubricating system for cold-rolling pipe mill |
| 11/14/2012 | CN102781600A Hot work tool and method for producing same |
| 11/13/2012 | US8307689 Discrete die |
| 11/07/2012 | CN202516843U Connecting device between core bar and core rod of two-roller Pilger rolling mill |
| 10/31/2012 | CN102755993A Device and method for circulating jacking rod of puncher |
| 10/31/2012 | CN101454089B Process for producing seamless stainless-steel pipe |
| 10/24/2012 | EP2514810A1 Lubricant composition for hot forming |
| 10/24/2012 | CN102753666A Lubricant for hot-rolling tools, and method for surface treatment of mandrel bar for use in producing seamless pipe by hot rolling |
| 10/17/2012 | CN202490821U Die bar for hollow gas cylinder |
| 10/17/2012 | CN102728617A Running device of mandril towline jiggers |
| 10/16/2012 | US8288325 Lubricant composition for hot forming |
| 10/11/2012 | WO2012136580A1 Mandrel conveying device for a tube rolling mill |
| 10/10/2012 | CN202479211U Puncher top |
| 10/10/2012 | CN202479210U Modified structure of core rod translation conveying device |
| 10/10/2012 | CN101405377B Lubricant for hot plastic working and powder lubricant composition for hot working |
| 09/26/2012 | CN202447378U Novel ejector rod cooling device |
| 09/26/2012 | CN202447377U Novel ejector rod bogie |
| 09/26/2012 | CN202447376U Core rod boosting device |
| 09/26/2012 | CN102009070B Cooling water channel device for mandrel pipe mill |
| 09/19/2012 | CN202438543U Punching and rolling equipment of high-alloy difficultly deformable seamless steel pipe |
| 09/13/2012 | WO2012120111A1 Process for rolling tubes in a continuous multi-stand rolling mill |
| 09/12/2012 | EP2496370A2 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 |
| 09/12/2012 | CN102665947A 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 |