| 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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| 09/12/2012 | CN102658296A Mill mandril thrust block with mandril automatically changeable online and automatic change method of mandril |
| 09/05/2012 | CN202411097U Internal lubricating mechanism of core bar of middle-feeding cold pipe mill |
| 09/05/2012 | CN202411096U Mandril turning mechanism |
| 09/05/2012 | CN102059252B Swing mechanism of cold-rolling pipe mill |
| 09/05/2012 | CN101448923B Lubricant composition for hot plastic working and method of hot plastic working with the same |
| 08/29/2012 | CN202398612U Mandrel retaining trolley for seamless steel pipe mill |
| 08/23/2012 | WO2012111307A1 Method for correcting pipe end of seamless pipe formed from high-cr stainless steel |
| 08/22/2012 | CN202387729U Stationary core rod for carrying out hot rolling on seamless steel tube |
| 08/22/2012 | CN202387728U Core rod supporting wheel |
| 08/22/2012 | CN202387727U Piercing point |
| 08/22/2012 | CN101994875B Method for manufacturing seamless copper pipe and rod core used for cold rolling mill |
| 08/15/2012 | EP1707618B1 Lubricant composition for hot forming |
| 08/15/2012 | CN202377263U Variable diameter device for expanding-contracting cylinder of aluminum plate cold rolling mill |
| 08/15/2012 | CN101842170B Method for producing a seamless steel pipe and rolling mill for performing the method |
| 08/08/2012 | CN202366946U Core rod cooling, stepping and conveying device |
| 08/08/2012 | CN202366945U Turning water spraying ring type core rod lubrication control device |
| 08/08/2012 | CN202366944U Hydraulic retained mandrel mechanism |
| 08/07/2012 | CA2701059C Piercing and rolling plug, method of regenerating such piercing and rolling plug, and equipment line for regenerating such piercing and rolling plug |
| 08/02/2012 | WO2012102961A1 Lubrication drying process for tube |
| 08/01/2012 | CN202356404U Ejection head centring device for perforating machine |
| 08/01/2012 | CN102615105A Fixing structure of mandrel trolley |
| 07/25/2012 | CN202343559U External pneumatic sheltered mandril lubrication control device |
| 07/25/2012 | CN202343558U Positioning and locking device of fixed mandril |
| 07/25/2012 | CN202343557U Blank pipe ejecting device with receiving hooks controlled by connecting rod |
| 07/25/2012 | CN102606841A Ship oil way protection device, processing method of protection sleeve and core rod for processing |
| 07/25/2012 | CN102601118A Lubricating system of cold reducing mill |
| 07/25/2012 | CN102601117A Three-roll plug steadier |
| 07/18/2012 | CN202336473U 一种无缝钢管的改进型穿孔小车 One kind of seamless steel perforated improved car |
| 07/18/2012 | CN101773933B Ejector pin and mandrel positioning device |
| 07/18/2012 | CN101653784B Ejector rob recycling replacing device of perforating machine |
| 07/12/2012 | US20120174646 Retract mandrel mill and method for rolling tube blank |
| 07/11/2012 | CN202316515U 穿孔机顶杆小车冷却水胶管的导向辊 Puncher ejector cooling water hose trolley guide rollers |
| 07/11/2012 | CN202316514U 一种芯棒预穿装置 One kind of pre-worn device mandrel |
| 07/11/2012 | CN102559337A Lubricating agent for high-temperature core rod and preparation method thereof |
| 07/04/2012 | CN202290731U 一种轧管机芯棒 One kind of rolling movement of the rod |
| 07/04/2012 | CN202290730U 一种用于穿孔机水冷顶头的顶头顶杆连接结构 Head ram connection structure for a puncher's water-cooled head |
| 07/04/2012 | CN102527725A Connection device for push head and push rod of perforating machine |
| 07/04/2012 | CN102527722A Perforating and rolling equipment and method of high-alloy and hard-deformation seamless steel tube |
| 07/03/2012 | US8210020 Hot stretch forming die having distortion-minimizing characteristics |
| 06/28/2012 | WO2012086177A1 Process for manufacture of seamless steel pipe |
| 06/28/2012 | WO2012022284A3 Process for hot-rolling metallic hollow bodies and corresponding hot-rolling mill |
| 06/27/2012 | CN102019293B Hydraulic control system for replacing top of perforation machine |
| 06/20/2012 | CN102500620A Mandril trolley cooling device for seamless steel tube puncher |
| 06/14/2012 | WO2012077334A1 Method for manufacturing seamless pipe |
| 06/13/2012 | CN202270713U Lengthened rod |
| 06/13/2012 | CN102489517A On-line control method for spraying graphite lubricant to mandrel |
| 06/13/2012 | CN102489516A Process and equipment for hot rolling extra-small diameter seamless steel pipe with fixed mandrel |
| 06/12/2012 | CA2615330C Nickel-base alloy and articles made therefrom |
| 06/06/2012 | CN202263771U 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 |
| 05/30/2012 | CN202238892U Graphite lubricating device for mandrel of pipe mill |
| 05/30/2012 | CN202238891U Adjusting mechanism for cold-rolling mill |
| 05/30/2012 | CN202238890U Piercing plug of composite tube |
| 05/30/2012 | CN101151355B Sintering inhibitor for hot plastic working of steel |
| 05/24/2012 | DE102011012761A1 Method for producing tube blank, involves rolling heated full block, perforating heated full block to hollow block by inner tool with piercer, and deoxidizing hollow block inner surface during rolling and/or perforating |
| 05/23/2012 | CN102463261A 一种穿孔顶头 One kind of piercing plug |
| 05/23/2012 | CN102463260A 冷轧管机回转机构的动力输出轴与芯棒卡盘的配合结构 Cold rolling mill complex structure of the power output shaft rotating mechanism mandrel chuck |
| 05/23/2012 | CN102463259A 冷轧管机回转机构的动力传动装置 The power transmission unit cold rolling mill rotation mechanism |
| 05/23/2012 | CN102463258A 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 |
| 05/23/2012 | CN102463257A 冷轧管机的芯棒回转机构的芯棒自动夹放装置 Mandrel mandrel rotation mechanism of automatic folder cold rolling mill discharge device |
| 05/23/2012 | CN102463256A 冷轧管机的送进机构的传动装置 Cold rolling mill gear feeding mechanism |
| 05/23/2012 | CN101468360B Seamless oil well steel tube restraint tandem rolling processing equipment |
| 05/09/2012 | CN102441571A Pin-lift device for tapered roller piercers |
| 05/02/2012 | CN101974717B Mandril for copper alloy pipe planetary rolling mill and manufacturing method thereof |
| 05/02/2012 | CN101773934B Braking device of mandril anti-thrust trolley |
| 05/02/2012 | CN101758075B Split type core locking device |
| 04/18/2012 | CN202192085U Inner cooling device for plug of puncher |
| 04/18/2012 | CN102416407A Ejecting rod trolley type centralized differential transmission device |
| 03/28/2012 | CN202174108U 精轧机用锁紧装置 Finishing mill with a locking device |
| 03/21/2012 | CN102380508A Improved perforating trolley for seamless steel tubes |
| 03/14/2012 | CN202162207U 新型脱管环 New detached ring |
| 02/23/2012 | WO2012022284A2 Process for hot-rolling metallic hollow bodies and corresponding hot-rolling mill |
| 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 | CN202143900U Adjusting mechanism with a lateral guide plate of a mandril trolley |
| 02/15/2012 | CN202143899U 连轧管机芯棒头 Rolling movement of the head tube |
| 02/15/2012 | CN102355961A Transfer equipment for plug for seamless steel pipe, and plug transfer tray |
| 02/08/2012 | CN202137192U 冷轧挤管机芯棒装置 Cold-rolled bar means squeeze tube movement |
| 02/08/2012 | CN202137191U 限动芯棒支撑装置 The stopper rod support means |
| 02/08/2012 | CN202137190U 冷轧管机的芯杆夹盘机构 Core rod cold rolling mill chuck mechanism |
| 02/08/2012 | CN202137189U 芯棒快速定位装置 Fast mandrel positioning device |
| 02/08/2012 | CN202137188U 芯棒连接装配结构 Connecting rod assembly structure |
| 02/08/2012 | CN102343362A Perforating and extending integrated machine |
| 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 |
| 02/01/2012 | CN101698195B 行星轧机用空芯棒 Planetary mill with an empty mandrel |
| 01/25/2012 | CN102330024A Steel for tandem tube mill hollow mandrel and preparation technology thereof |
| 01/25/2012 | CN102327899A Mandrel support device of mandrel pipe mill and mandrel pipe mill |
| 01/25/2012 | CN102327898A Method for estimating thick-wall thinning reliability of hollow mandril |
| 01/25/2012 | CN102327897A Tappet centering device for perforating machine |
| 01/25/2012 | CN102327895A Cooling device in piercer top |
| 01/25/2012 | CN101722308B Molybdenum-base rare earth powder metallurgy forming plug and manufacturing method thereof |
| 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 | CN202105844U Drive drum of piercing mill mandrel thrust block |
| 01/11/2012 | CN102312163A Steel for mandrel pipe mill mandril and preparation technology thereof |
| 01/11/2012 | CN102310081A Ejection rod installation and removal device |
| 01/04/2012 | CN101905244B Method for producing mandrel by utilizing 28NiCrMoV steel as raw material |
| 12/29/2011 | DE102010049645A1 Method for hot-rolling of metallic elongated hollow body, involves applying lubricant on rolling bar arranged in hollow body before hot-rolling process, and bringing lubricant into solid form at rolling bar |
| 12/28/2011 | EP1872878B1 Process for producing seamless tube |
| 12/28/2011 | CN202087579U 钼基顶头 Molybdenum-based head |