| Patents for B21B 21 - Pilgrim-step tube-rolling (473) |
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| 07/22/2010 | WO2010082395A1 Process for production of duplex stainless steel pipe |
| 07/01/2010 | WO2010073863A1 Process for production of seamless metal pipe by cold rolling |
| 07/01/2010 | CA2743165A1 Method for producing seamless metallic tube by cold rolling |
| 06/24/2010 | WO2010070990A1 Method for producing high alloy steel pipe |
| 06/23/2010 | CN201511040U Feeder of pilgrim rolling unit |
| 06/23/2010 | CN101745537A Method for producing seamless steel tube with heat preservation cover of pilger mill |
| 06/16/2010 | CN101733281A Mill for cold rolling of pipes |
| 06/16/2010 | CN101733280A Cold-rolling pipe mill |
| 06/16/2010 | CN101733279A Cold-rolling mill |
| 06/16/2010 | CN101733278A Cold pipe mill |
| 06/16/2010 | CN101733277A Rolling mill of cold-rolling mill for pipes rolling |
| 06/09/2010 | CN101722189A Large-scale cold rolling seamless steel mill and rolling method thereof |
| 05/19/2010 | CN201470679U Steel pipe rotary feeding mechanism of pipe mill |
| 05/19/2010 | CN201470678U Circular hole type roll component |
| 05/05/2010 | CN101700529A Cold-rolling mill for pipes |
| 04/28/2010 | CN101698194A Method for centering capillary mandril based on Pilger intermittent seamless tube-rolling process |
| 04/08/2010 | WO2010037754A1 Cladding tube for nuclear fuel rod, method and apparatus for manufacturing a cladding tube |
| 03/31/2010 | CN101687232A Method for producing ultra thin wall metallic tube by cold rolling method |
| 03/17/2010 | CN201423383Y Device for balancing movement of stand for intermittent cold pipe rolling mill |
| 03/10/2010 | CN201419186Y Double-feeding device for cold rolling mill |
| 03/10/2010 | CN201419185Y Reciprocating double-rolling device |
| 01/20/2010 | EP2145705A1 Seamless steel pipe, hollow spring utilizing seamless steel pipe, and process for manufacturing the same |
| 01/19/2010 | US7647803 Rotary apparatus with multiple guides and method of forming |
| 11/18/2009 | CN101579703A New technique for manufacturing high alloy steel seamless pipe with heavy calibre by adopting pilger mill |
| 10/14/2009 | CN201324737Y Unequal-spacing stepper of steel tube |
| 10/07/2009 | CN201320553Y Roller for two-roller periodical cold rolling mill |
| 10/07/2009 | CN101549355A Double-feeding reciprocating type double rolling mill equipment and technique thereof |
| 09/30/2009 | CN101543840A Double-feed reciprocating seamless stainless steel pipe cold rolling equipment and process thereof |
| 08/20/2009 | WO2009101359A1 Method for making bars made of a zirconium, titanium or hafnium alloy, bars thus obtained, and components made of a zirconium, titanium or hafnium alloy and machined from said bars |
| 08/05/2009 | EP2085159A1 Process for manufacturing metal pipe with extremely thin wall by cold rolling |
| 08/05/2009 | CN201283357Y Large-sized cold rolling seamless steel tube machine |
| 06/11/2009 | WO2009072194A1 Process for manufacturing metal pipe with extremely thin wall by cold rolling |
| 05/07/2009 | US20090113975 Roll die assemblies for pilger mills |
| 04/15/2009 | CN201220238Y Tube rolling stepping detection device |
| 02/11/2009 | CN201192694Y Balancing device of crankshaft-double eccentric quality level for cold tube mill |
| 01/28/2009 | CN101354062A Improved structure of universal joint |
| 01/13/2009 | CA2550913C Cold rolling process for metal tubes |
| 01/06/2009 | CA2550931C Cold rolling process for metal tubes |
| 12/24/2008 | CN201168719Y Practical reversible reciprocating periodic hot milling roll |
| 09/18/2008 | WO2008111200A1 Seamless steel pipe, hollow spring utilizing seamless steel pipe, and process for manufacturing the same |
| 08/27/2008 | CN101249509A Reversible reciprocating periods hot milling roll |
| 08/27/2008 | CN101249508A Method for producing seamless steel pipe with reversible reciprocating periodic time hot rolling technique |
| 08/06/2008 | CN101234399A Cold pilger mill crankshaft-dual eccentric center quality level balance method |
| 07/30/2008 | CN100406144C Cold rolling process for metal tubes |
| 06/18/2008 | CN100395043C Mechanism of cold pilger mill for coordinating main rolling movement and rotating movement of feeding pipe blank |
| 06/11/2008 | CN100393433C Cold rolling process for metal tubes |
| 05/21/2008 | CN101184561A Method of manufacturing ultrathin wall metallic tube by cold working method |
| 04/29/2008 | US7363791 Rotary stamping apparatus and method of forming sheet metal |
| 03/19/2008 | CN201036788Y All balance periodical non-offset two-roller cold pipe mill |
| 03/05/2008 | CN100372621C Method for manufacturing copper aluminium composite tubing and copper aluminium tubing produced thereby |
| 02/26/2008 | US7334446 Method for producing a striplike pre-material made of metal, especially a pre-material which has been profiled into regularly reoccurring sections, and device therefor |
| 02/12/2008 | US7328599 Method and apparatus for making metal ball bats |
| 02/06/2008 | EP1884296A1 Method of manufacturing ultrathin wall metallic tube by cold working method |
| 12/21/2007 | WO2007108038A8 Production system of weldable and stainless tubular structures with high mechanical strength and product obtained therefrom |
| 11/22/2007 | WO2007108038A3 Production system of weldable and stainless tubular structures with high mechanical strength and product obtained therefrom |
| 10/24/2007 | CN101058286A Vehicle mounted electric sleeve barrel |
| 08/29/2007 | CN200939453Y Coordinate mechanism of cold tube mill |
| 08/22/2007 | CN101020192A Hot rolling process of seamless steel pipe |
| 08/22/2007 | CN101020191A Hot rolling process of seamless steel pipe |
| 08/22/2007 | CN101020190A Hot rolling process of seamless steel pipe |
| 08/08/2007 | CN1330436C Method for making soldered hot-rolled composite metal tube |
| 06/12/2007 | US7228720 Rotary apparatus and method |
| 05/30/2007 | CN2905252Y Two-roll cycle hole type bidirection rotary cold pilger mill |
| 04/10/2007 | US7201812 Method for manufacturing seamless steel tube |
| 03/21/2007 | EP1764422A1 Method for fabricating austenitic steel and compressor casing produced from said steel |
| 03/13/2007 | CA2321493C Tool design for tube cold pilgering |
| 03/08/2007 | US20070051151 Rotary apparatus with multiple guides and method of forming |
| 01/10/2007 | CN1891365A Cold rolling process for metal tubes |
| 01/10/2007 | CN1891364A Cold rolling process for metal tubes |
| 01/03/2007 | EP1738840A1 Cold rolling process for metal tubes |
| 01/03/2007 | EP1738839A2 Cold rolling process for metal tubes |
| 11/30/2006 | WO2006126565A1 Method of manufacturing ultrathin wall metallic tube by cold working method |
| 11/15/2006 | CN1861280A Mechanism of cold pilger mill for coordinating main rolling movement and rotating movement of feeding pipe blank |
| 10/11/2006 | CN1843646A Method for manufacturing copper aluminium composite tubing and copper aluminium tubing produced thereby |
| 09/13/2006 | EP1080799B1 Calibration of an instrument for the cold-rolling of tubes |
| 08/15/2006 | US7090605 Apparatus for processing a prosthetic component |
| 08/02/2006 | CN1811203A Pneumatic rotary tools |
| 08/01/2006 | US7082799 Drive system for a rolling mill |
| 07/19/2006 | CN1264619C Design method for tool for cold-rolling of tubes |
| 07/11/2006 | US7073362 Drive for cold pilger rolling stand |
| 06/08/2006 | DE102004059092A1 Seamless pipe, of high heat resistant steel formed from a block shaped into a hollow body with the base pierced to form a thick-wall pipe while hot to be rolled to the final dimensions and tempered |
| 06/08/2006 | DE102004059091A1 Production of a hot-rolled seamless pipe made from steel used in oil and gas conveying comprises forming a larger wall thickness than the remaining tubular body on the pipe ends and mechanically processing the inner periphery |
| 05/30/2006 | CA2234218C Process for manufacturing tubes using the cold pilger step-by-step process |
| 05/23/2006 | US7047782 Method for roll forming, capable of preventing wrinkles and device therefor |
| 05/03/2006 | CN1254321C Drive system for a rolling mill |
| 05/02/2006 | US7037249 Deflection controlled roll |
| 03/29/2006 | CN2766987Y Rolling head of planetary tube and bar rolling mill |
| 02/08/2006 | CN1240495C Driving system of pilger cold-milling machine |
| 02/01/2006 | CN2754760Y Cool and oxidation preventor of planetary pipe bar roller |
| 06/01/2005 | EP1080799A4 Calibration of an instrument for the cold-rolling of tubes |
| 05/25/2005 | CN1618540A Method for making soldered hot-rolled composite metal tube |
| 02/16/2005 | EP1429876B1 Drive system for a rolling mill |
| 01/04/2005 | US6837945 Steel cold work tool, its use and manufacturing |
| 12/29/2004 | CN1558800A Drive system for a rolling mill |
| 12/16/2004 | US20040250589 Method and apparatus for forming discrete microcavities in a filament wire |
| 12/15/2004 | CN2663041Y Crank link mechanism for periodic dual-pipe cold-rolling mill having dual balance weight |
| 11/17/2004 | CN2656036Y Cold rolled pipe machine feeding and rotating machanism |
| 10/28/2004 | DE10311144B3 Verfahren zum Herstellen eines Rohres mit einer Innenprofilierung und Vorrichtung zur Durchführung des Verfahrens A method for manufacturing a pipe with an inner profiling and apparatus for carrying out the method |
| 10/20/2004 | EP1194604B1 Steel cold work tool, its use and manufacturing |
| 09/23/2004 | US20040182124 Method for roll forming, capable of preventing wrinkles and device therefor |