| 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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| 11/17/2010 | CN201632478U Cooling and lubricating device of movable core rod |
| 11/17/2010 | CN201632477U Movable short mandrel device of men tube mill |
| 11/03/2010 | CN201618722U High-speed rack driving device of ejector rod thrust trolley of perforator |
| 11/03/2010 | CN101596551B Binary alloy coating seamless steel tube top and manufacture method thereof |
| 10/19/2010 | US7816306 vinyl acetate-sodium alkylallyl sulfosuccinate surfactant emulsion copolymer, a protective colloid selected from hydroxyethyl cellulose, sodium salt or ammonium salt of carboxymethyl cellulose; boric acid molybdenum acid or tungsten acid amine salt; lubricant for hot rolling seamless pipe or tube |
| 10/13/2010 | CN201603743U 冷轧管机上的钳口式芯棒托架 Jaw-type mandrel bracket on the cold rolling mill |
| 10/13/2010 | CN201603742U 一种用于定减径机组的拉力芯棒装置 A given unit of reducing tension mandrel means for |
| 10/13/2010 | CN1929933B Seamless tube piercing/rolling plug, seamless tube producing apparatus, and seamless tube producing method therewith |
| 10/06/2010 | CN101850365A Production method of retained mandrels |
| 10/06/2010 | CN101850363A Technology and device for forming hollow anchor stock in one step through reduction (phi 40-phi 50) hot rolling |
| 09/29/2010 | CN101848777A Piercing plug, method for regenerating piercing plug, and regeneration facility line for piercing plug |
| 09/23/2010 | WO2010107135A1 Transfer equipment for plug for seamless steel pipe, and plug transfer tray |
| 09/22/2010 | CN101842170A Method for producing a seamless steel pipe and rolling mill for performing the method |
| 09/15/2010 | CN201579258U Mandrel positioning device |
| 09/15/2010 | CN201579257U Steel pipe rolling core bar sport car |
| 09/10/2010 | WO2010100968A1 Plug, piercing rolling apparatus and method of manufacturing seamless tube using the same |
| 09/01/2010 | EP2224025A1 Nickel-based superalloy |
| 09/01/2010 | CN101530862B Core rod precooling device |
| 09/01/2010 | CN101450350B Method and rolling mill to produce wireless steel pipes |
| 09/01/2010 | CN101400455B Mandrel bar for rolling of high alloy, method for surface treatment of the mandrel bar, method for manufacture of the mandrel bar, and method for operation of seamless steel pipe production apparatus |
| 08/26/2010 | US20100212387 Method for producing a seamless steel pipe and rolling mill for performing the method |
| 08/25/2010 | CN201558845U Cold rolling die suitable for special tube of double-roll cold rolled tube machine |
| 08/19/2010 | WO2010092144A1 Nickel-based superalloy and manufacturing process thereof |
| 08/18/2010 | CN101061208B Powdered lubricant composition for hot working and method for manufacturing seamless tubes |
| 08/11/2010 | CN201543649U Automatic chuck mechanism for cold-rolling pipe mill |
| 08/11/2010 | CN101480662B Grooving pushing-in rotary type roll shaft and roll stand |
| 08/04/2010 | CN101791628A Cooling tank device of hot-rolling perforation machine set |
| 07/16/2010 | CA2659953A1 Tube making machine with diameter control and method |
| 07/14/2010 | CN101773936A Ultralong pipe cold rolling equipment |
| 07/14/2010 | CN101773934A Braking device of mandril anti-thrust trolley |
| 07/14/2010 | CN101773933A Ejector pin and mandrel positioning device |
| 07/07/2010 | CN201519698U Mandrel clamping device of cold pilger mill |
| 06/30/2010 | CN201516438U Piercing plug |
| 06/30/2010 | CN101758075A Split type core locking device |
| 06/30/2010 | CN101758074A Mandrel-holding device for tube mills |
| 06/23/2010 | EP2198984A1 Piercing plug, method for regenerating piercing plug, and regeneration facility line for piercing plug |
| 06/23/2010 | CN201511046U Cross wedge rolling hollow shaft type loading and unloading device |
| 06/23/2010 | CN201511041U Device for clamping ejector head |
| 06/16/2010 | CN201505665U Device for circularly replacing ejector rod of perforator |
| 06/16/2010 | CN201505664U A mandrel dolly transmission device |
| 06/16/2010 | CN201505663U Top rod trolley capable of quickly replacing top rod |
| 06/16/2010 | CN101391265B Base steel composite material for seamless steel pipe top and preparation method thereof |
| 06/09/2010 | CN101722308A Molybdenum-base rare earth powder metallurgy forming plug and manufacturing method thereof |
| 06/09/2010 | CN101428296B Pre-rotation apparatus for large-scale punching machine post rod |
| 06/09/2010 | CN101254510B Centering device of roller milling steel tube |
| 06/02/2010 | CN201493311U Propping adjustment device for replacement of movable buckle tile with different specifications |
| 06/02/2010 | CN101716599A High-speed rack transmission device of mandril thrust trolley of puncher |
| 05/27/2010 | DE102008028348B4 Vorrichtung zum Führen von rotierenden Dornstangen und Hohlblöcken im Bereich von Schrägwalzwerken Device for guiding rotating mandrel rods and hollow blocks in the range of skew rolling mills |
| 05/26/2010 | CN201482793U Core rod chain supporting guide device for rod inserting machine |
| 05/26/2010 | CN201482790U 改进后的均整机 Both whole improved |
| 05/19/2010 | CN201470681U Heat centering cone head |
| 05/19/2010 | CN201470680U Nitrogen protection throttling device for planetary rolling mill |
| 05/19/2010 | CN201470678U Circular hole type roll component |
| 05/19/2010 | CN201470677U Composite piercing plug |
| 05/19/2010 | CN101346194B Plug used in boring machine |
| 05/19/2010 | CN101208160B Process for producing seamless tube |
| 04/28/2010 | CN101698195A Hollow core rod used for planetary rolling mill |
| 04/15/2010 | US20100089111 Piercer, Plug and Method of Manufacturing Seamless Pipe or Tube |
| 04/14/2010 | CN1683093B Tool for thermal processing |
| 03/30/2010 | CA2563114C Cryofluid assisted forming method |
| 03/24/2010 | CN100595027C Two-stand angularly hot rolling minor diameter seamless steel tube rolling technique and equipment thereof |
| 03/11/2010 | WO2010025790A1 Method for producing a seamless steel pipe and rolling mill for performing the method |
| 03/04/2010 | US20100050723 Piercing and Rolling Plug, Method of Regenerating Such Piercing and Rolling Plug, and Equipment Line for Regenerating Such Piercing and Rolling Plug |
| 03/03/2010 | CN201417132Y Detection system for quick and proper replacement of plug of perforating machine |
| 03/03/2010 | CN101658867A Driving device for mandrel trolley |
| 02/24/2010 | CN101653784A Ejector rob recycling replacing device of perforating machine |
| 02/24/2010 | CN101653783A Top clamping device |
| 02/24/2010 | CN101653782A Ejector rob trolley provided with rapidly replaced ejector rob |
| 02/16/2010 | CA2631149C Plug for use in piercing mill |
| 02/10/2010 | CN101646505A 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 |
| 01/28/2010 | US20100018282 Mandrel assembly and method of using the same |
| 01/27/2010 | CN201390791Y Sealing system of core bar chromium-plated equipment |
| 01/13/2010 | CN201380186Y Centering roller device |
| 01/06/2010 | CN201375985Y Mandrel pre-cooling device |
| 12/30/2009 | CN100575468C Lubricant composition for seamless steel pipe working |
| 12/16/2009 | CN100569403C Rear chuck mechanism for cold pilger mill |
| 12/10/2009 | WO2009147087A1 Rolling mill of rotating expander type for tubular bodies with tip-stabilizing system |
| 12/10/2009 | DE102008028348A1 Vorrichtung zum Führen von rotierenden Dornstangen und Hohlblöcken in Schrägwalzwerken Device for guiding rotating mandrel bars and hollow blocks in inclined rolling mills |
| 12/09/2009 | EP2130622A1 Device for guiding rotating mandrel bars and hollow blocks in the area of skew rolling plants |
| 12/09/2009 | CN201357166Y Core rod of tube rolling machine |
| 12/09/2009 | CN101596552A Device for bearing and guiding mandril chain of plunger machine |
| 12/09/2009 | CN101596551A Binary alloy coating seamless steel tube top and manufacture method thereof |
| 12/09/2009 | CN101596550A Clamping device of mandril in cold pilger |
| 12/03/2009 | US20090293569 Method for Applying Lubricant onto Mandrel Bar, Method for Controlling Thickness of Lubricant Film on Mandrel Bar, and Method for Manufacturing Seamless Steel Pipe |
| 11/25/2009 | CN201350458Y Core-rod pre-piercing platform |
| 11/18/2009 | CN201347911Y Circular disc extending unit perforating machine centering roller hydraulic system |
| 11/18/2009 | CN201346556Y Graphite spray coating constant pressure control system for mandrel |
| 11/18/2009 | CN201346555Y Slotted push-in rotary type roll shaft and roller rack |
| 10/28/2009 | EP2111933A1 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 |
| 10/28/2009 | EP1816184B1 Powder lubricant composition for hot working and process for producing seamless tube |
| 10/21/2009 | CN101559436A Quick connecting device for punch top and mandril of perforator |
| 10/21/2009 | CN100551564C Boring machine, plug, and method of manufacturing seamless steel tube |
| 10/14/2009 | CN101554634A Mobile hot centering machine |
| 10/13/2009 | CA2532531C Adjustable horn for spiral pipe forming machine |
| 10/07/2009 | EP2106863A1 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 |
| 10/07/2009 | CN201320552Y Mandrel pre-rotating device for piercing mill mandrel thrust block |
| 10/07/2009 | CN101553327A Manufacturing method for seamless pipe |
| 10/07/2009 | CN101549355A Double-feeding reciprocating type double rolling mill equipment and technique thereof |
| 10/01/2009 | WO2009119401A1 METHOD FOR PLATING MANDREL BAR WITH Cr, MANDREL BAR, AND PROCESS FOR PRODUCING SEAMLESS PIPE USING THE METHOD AND THE MANDREL BAR |
| 09/16/2009 | CN101530862A Core rod precooling device |