| 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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| 01/15/2014 | EP2683500A1 Process for rolling tubes in a continuous multi-stand rolling mill |
| 01/15/2014 | CN203389937U Mandril compressing device |
| 01/15/2014 | CN103517772A Mandrel conveying device for a tube rolling mill |
| 01/15/2014 | CN103506385A Ejector header |
| 01/15/2014 | CN103506384A Puncher |
| 01/01/2014 | CN203370813U Pre-screwing and auxiliary machine device of mandrel screw-on machine |
| 01/01/2014 | CN203370812U Perforator push rod dolly cooling water pipe drawing mechanism |
| 12/25/2013 | EP2676747A1 Method for correcting pipe end of seamless pipe formed from high-cr stainless steel |
| 12/25/2013 | EP2014378B1 Process for producing stainless-steel pipe |
| 12/25/2013 | CN203356199U Internal circulation throttling pipeline of graphite pump station of seamless steel tube production line |
| 12/25/2013 | CN203356198U Limiting-trolley transverse supporting plate provided with modularized V-shaped groove |
| 12/25/2013 | CN203356197U High-stability stopping trolley for seamless steel tube production line |
| 12/25/2013 | CN203356196U Push rod trolley for seamless steel tube production line |
| 12/25/2013 | CN203356195U Core rod clamping device |
| 12/25/2013 | CN203356194U Pre-penetrating chain with two detecting blocking plates |
| 12/25/2013 | CN203356193U Perforator ejection head and perforator |
| 12/25/2013 | CN103464507A Production method for high-precision austenite seamless steel pipe |
| 12/18/2013 | EP2055399B1 Mandrel bar cleaning facility |
| 12/18/2013 | EP2007533B9 Mandrel holder head with release device |
| 12/18/2013 | CN203343167U Blank tube cold-rolling die |
| 12/18/2013 | CN103451551A Preparation method of cast steel perforator top tip with high-temperature resistance and corrosion resistance |
| 12/12/2013 | WO2013183213A1 Manufacturing method for piercing plug |
| 12/12/2013 | US20130327107 Hot work tool and method for producing same |
| 12/11/2013 | CN103442819A Process for rolling tubes in a continuous multi-tand rolling mill |
| 12/11/2013 | CN103433286A Pipe mill core rod graphite lubrication and spraying system |
| 12/11/2013 | CN103433285A Core rod centering device for perforating machine |
| 12/11/2013 | CN103433284A Seamless steel tube mill retracting device |
| 12/11/2013 | CN103433283A Pipe mill graphite core rod water blowing device |
| 12/11/2013 | CN103433282A Stopper mechanism for top of seamless steel tube puncher |
| 12/11/2013 | CN103433281A Ejector header cooling device of seamless tube perforating machine |
| 12/04/2013 | CN203316482U Backstage two-stage stopper mechanism of hot-rolling seamless pipe production line |
| 11/27/2013 | CN203304283U Cold pilger mill swing mechanism with oil cylinder output |
| 11/27/2013 | CN203304282U Novel swing mechanism of cold pilger mill |
| 11/20/2013 | CN203292180U Extending mandril for seamless steel pipe rolling machine |
| 11/20/2013 | CN103394511A Steel pipe rolling method without generation of Pilger bell ends |
| 10/31/2013 | WO2013161489A1 Plug used in piercing machine |
| 10/31/2013 | WO2013161177A1 Facility for producing piercing plug |
| 10/31/2013 | WO2013161176A1 Method for manufacturing piercing plug |
| 10/31/2013 | WO2013161175A1 Method for producing piercing plug |
| 10/30/2013 | EP2656935A1 Process for manufacture of seamless steel pipe |
| 10/30/2013 | CN103372569A Large-diameter high-density molybdenum alloy plug |
| 10/24/2013 | WO2013157312A1 Method for producing plug for heat formed pipe |
| 10/23/2013 | CN103370152A Method for correcting pipe end of seamless pipe formed from high-Cr stainless steel |
| 10/17/2013 | WO2013153878A1 Plug used in piercing machine and plug regeneration method |
| 10/17/2013 | US20130269407 Method for producing seamless steel tube/pipe |
| 10/16/2013 | EP2650060A1 Method for manufacturing seamless pipe |
| 10/16/2013 | CN103350111A Mandrel screw-on machine pre-screwing and auxiliary machine device |
| 10/09/2013 | CN101505886B Mandrel bar cleaning facility |
| 10/08/2013 | US8550326 Expandable mandrel for use in friction stir welding |
| 10/02/2013 | CN102357531B Composite roll forming process of thick-wall deep-groove ring member |
| 09/25/2013 | CN203209431U Carrier roller device used for rolling mill bed body mandrel |
| 09/25/2013 | CN203209430U Quick resetting device for core rod stopping rack after transmission release |
| 09/25/2013 | CN102327899B Mandrel support device of mandrel pipe mill and mandrel pipe mill |
| 09/18/2013 | CN203196990U Stainless steel piercing plug |
| 09/18/2013 | CN103302099A Back-up roll hydraulic control system of mandrel pipe mill |
| 09/17/2013 | US8535323 Constraining ring inserter |
| 09/11/2013 | CN103290410A Laser cladding manufacturing method of seamless steel tube piercing plug |
| 09/11/2013 | CN103286134A Core rod clamping mechanism of double-roller cold reducing mill |
| 09/11/2013 | CN103286133A Perforated molybdenum piercing head structural member |
| 09/04/2013 | CN203170703U Mandrel alignment clamping device for tube push bench front table |
| 09/04/2013 | CN203170702U Hollow billet clamping device for tube push bench front table |
| 08/28/2013 | CN203155700U Cooling device of ejecting head of seamless steel tube puncher |
| 08/28/2013 | CN203155699U Stopper mechanism of ejecting head of seamless steel tube puncher |
| 08/28/2013 | CN103269809A Process for manufacture of seamless steel pipe |
| 08/21/2013 | CN203140433U Rolling device and rolled tube core bar thereof |
| 08/21/2013 | CN203140432U Three-roller mandrel supporting device |
| 08/21/2013 | CN203140431U Roller structure of support mandril |
| 08/21/2013 | CN203140430U Pre-tensioning device of mandrel thrust block bearing |
| 08/21/2013 | CN203140429U Modified ejector rod thrust trolley device |
| 08/21/2013 | CN203140428U Ejection rod of perforating unit |
| 08/21/2013 | CN203140427U Ejection head of perforating unit |
| 08/21/2013 | CN103256821A Method for preheating mandril of seamless steel tube rolling machine |
| 08/14/2013 | CN203124424U Rod separating machine overload protection device |
| 08/14/2013 | CN203124417U Core rod clamping and conveying mechanism |
| 08/14/2013 | CN203124416U Reversible piercer plug centering roller device |
| 08/14/2013 | CN103249503A Method for manufacturing seamless pipe |
| 08/14/2013 | CN103240274A Piercing plug device of piercer, piercer and production method of seamless steel tubes |
| 08/07/2013 | CN203108951U Lubricating component of tube billet automatic inner lubricating device |
| 08/07/2013 | CN103230937A Hydraulic supporting control mechanism of roller connecting shaft and relevant puncher and relevant pipe milling machine |
| 08/07/2013 | CN102327895B Cooling device in piercer top |
| 07/31/2013 | CN203091410U Pressure-equalizing piercing plug |
| 07/17/2013 | CN203061559U Quick-change sleeve for ejector head of puncher |
| 07/17/2013 | CN203061558U Cooling water pipe device for rolling mill mandrel |
| 07/17/2013 | CN203061557U Production adjusting device for seamless steel tubes |
| 07/17/2013 | CN203061556U Roller die with bearing protective structure |
| 07/17/2013 | CN203061555U Pipe pusher group |
| 07/17/2013 | CN203061554U Pipe pusher roller die |
| 07/17/2013 | CN203061553U Safety protection device for pipe pusher tooth rack |
| 07/17/2013 | CN103203363A Modified elongation mandrel for seamless steel tube rolling mill and production method of same |
| 07/17/2013 | CN103203362A Clasping roll mechanism used during seamless steel pipe production |
| 07/17/2013 | CN102277221B Novel glass lubricant of stainless steel extruded tube |
| 07/10/2013 | CN203044522U Core-rod supporting roll automatic adjusting system for hot-rolled seamless steel pipe production line |
| 07/10/2013 | CN203044492U Ejector rob three-dimensional circulating device of perforating machine |
| 07/10/2013 | CN203044491U Piercing plug internal cooling water pipe operating device |
| 07/03/2013 | CN102327898B Method for estimating thick-wall thinning reliability of hollow mandril |
| 06/26/2013 | CN203018457U Steel tube piercing plug |
| 06/19/2013 | CN203002753U Guide plate with double-layer structure |
| 06/12/2013 | CN202984276U Inner cooling core rod |
| 06/12/2013 | CN202984275U Steel tube hot piercing plug |
| 06/06/2013 | WO2013080528A1 Tool for piercing mill |