| Patents for B21B 19 - Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work (1,478) |
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| 09/02/2009 | CN101518783A Method for processing titanium tube for extension tube of zoom lens of digital camera |
| 09/02/2009 | CN101518782A Centering roller with compact structure |
| 08/26/2009 | CN100532617C Martensitic stainless steel seamless pipe and a manufacturing method thereof |
| 08/25/2009 | US7578157 Piercing-rolling method and piercing-rolling apparatus for seamless tubes |
| 08/19/2009 | CN201291237Y Upper guide-plate adjustment device for seamless steel tube perforator |
| 08/12/2009 | EP1679136B1 Method of manufacturing seamless tube by three-roll mandrel mill |
| 08/12/2009 | CN101502845A Corner rolling technique for bar material |
| 08/05/2009 | CN201283363Y On-line detection apparatus of hot rolling guide disc |
| 08/05/2009 | CN100522405C Method for producing seamless pipe |
| 08/05/2009 | CN100522404C Process for producing seamless steel pipe |
| 07/22/2009 | EP2080569A1 Device and method for monitoring manufacturing status of seamless pipe and seamless pipe manufacturing facility |
| 07/22/2009 | EP1637244B1 Method of manufacturing seamless tube |
| 07/22/2009 | CN100515589C Technologic process and special apparatus for rolling seamless steel pipe |
| 07/08/2009 | CN101474634A Three-roller tube-rolling machine |
| 07/08/2009 | CN100509192C Drilling/rolling method in manufacturing seamless tube |
| 06/25/2009 | US20090158799 Metal Pipe and Manufacturing Method Thereof |
| 06/17/2009 | CN101456035A Multifunctional perforating machine set |
| 06/10/2009 | DE102008056988A1 Seamless steel pipe producing method for rolling mill, involves providing inner tool in interior of pipe blank, where rotation movement opposite to rotary movement of pipe blank is imposed to piercer |
| 06/10/2009 | CN101450349A Installation adjusting method of piercing mill and guide disk for rolling steel tube |
| 05/27/2009 | CN201244598Y Sealing device of water box for cooling head of seamless pipe perforating machine |
| 05/27/2009 | CN201244596Y Diagonal rolling tube mill guide plate |
| 05/27/2009 | CN201244575Y Roll profile of rotary rolling pipe mill |
| 05/27/2009 | CN101439359A Material pushing apparatus with movable joint for inlet station of perforating machine |
| 05/27/2009 | CN101439352A Device for hoisting and lowering main engine base of sizing mill with three machine frames |
| 05/27/2009 | CN101439350A Method for producing seamless steel pipe for producing gas cylinder with heavy caliber for hauled vehicle |
| 05/27/2009 | CN100491002C Ceramic-metallic composite cladding layer top head for tube inserting machine and method for producing the same |
| 05/26/2009 | US7536888 Process for manufacturing a seamless tube |
| 05/20/2009 | CN100489263C Technology for manufacturing collar thick-wall seamless steel pipe |
| 05/20/2009 | CN100488650C Method and apparatus for manufacturing tubes |
| 05/13/2009 | CN101428297A Section design method for sizing machine for casing tube with special through diameter |
| 05/13/2009 | CN101428296A Pre-rotation apparatus for large-scale punching machine post rod |
| 05/12/2009 | US7530248 Plug for use in piercing mill |
| 05/07/2009 | US20090113970 Method Of Making A Seamless Hollow Body From Steel |
| 05/05/2009 | CA2431090C Method of and apparatus for determining the eccentricity of a hollow billet |
| 04/29/2009 | EP2052795A1 Method for producing seamless pipe |
| 04/29/2009 | CN201227657Y Low guide plate and outlet/inlet guide locking apparatuses for perforating machine |
| 04/29/2009 | CN101418421A High intensity oil casing tube for resisting sulfurated hydrogen corrosion and method for producing the same |
| 04/29/2009 | CN101417288A Pull core rod device for sizing and reducing set |
| 04/23/2009 | WO2009049589A1 Method and apparatus for measuring the eccentricity of a hot-fabricated seamless tube during production |
| 04/22/2009 | EP2050518A1 Method, and apparatus, for piercing and rolling seamless pipe |
| 04/22/2009 | CN101412041A Composite drag links and operation device |
| 04/15/2009 | CN201220242Y Heavy caliber seamless steel pipe diagonal rolling reeling pierced billet pre-rotation guide disc apparatus |
| 04/15/2009 | CN101410196A Process for manufacturing a seamless tube |
| 04/15/2009 | CN101410195A Method for manufacturing seamless pipe |
| 04/09/2009 | US20090090153 Retained mandrel rolling mill for seamless tubes |
| 04/08/2009 | CN101405096A Method for manufacturing seamless pipe |
| 04/08/2009 | CN101405095A Method, and apparatus, for piercing and rolling seamless pipe |
| 04/02/2009 | US20090084151 Process for producing seamless stainless steel pipe |
| 04/02/2009 | DE102007041149B3 Verfahren und Vorrichtung zum Querwalzen abgestufter Hohlwellen oder zylindrischer Hohlteile aus einem Rohr Method and apparatus for cross-rolling stepped hollow shafts or cylindrical hollow parts of a tube |
| 04/01/2009 | CN100473751C Disc shaped roll and producing method thereof |
| 03/31/2009 | US7509828 Tool for making enhanced heat transfer surfaces |
| 03/25/2009 | CN101394943A Process for producing high-Cr seamless pipe |
| 03/24/2009 | US7506526 Seamless tube piercing/rolling plug, and seamless tube producing method using same |
| 03/18/2009 | CN101386037A Treatment technique of 1010 steel for bearing ring |
| 03/12/2009 | US20090064748 Process for manufacturing a seamless tube |
| 03/12/2009 | DE102007041992A1 Tubular or rod-shaped rolling stock's skew rolling device for e.g. producing smooth pipes, has shaft supported at central axis of drive wheel such that axis runs in plane that extends in or opposite to rolling stock longitudinal axis |
| 03/11/2009 | CN101380644A Quick replacement device of guide plate rack on large caliber perforating machine |
| 03/11/2009 | CN101380642A Locking method of piercer roll of hot-rolled seamless tube |
| 03/11/2009 | CN101380641A Device for skew rolling the tubular or rod shaped rolling piece |
| 03/11/2009 | CN100467150C Push-rod device for seamless steel pipe perforating machine |
| 03/11/2009 | CN100467149C Delivery mechanism for outlet platform ejector pin circulation of punching machine |
| 03/05/2009 | US20090056400 Method and apparatus for producing stepped hollow shafts or stepped cylindrical hollow members by transverse rolling |
| 03/04/2009 | CN201200988Y Machine for rolling and processing pipe |
| 03/04/2009 | CN101376136A Method for producing martensitic stainless steel seamless steel pipe |
| 03/04/2009 | CN101376135A Method for producing improved stainless steel seamless steel pipe |
| 03/04/2009 | CN101376134A Method for producing martensitic stainless steel seamless steel pipe |
| 03/04/2009 | CN100464882C A manufacturing method of seamless tube |
| 02/25/2009 | CN201197988Y Plug locking structure |
| 02/25/2009 | CN100463733C Method for processing titanium pipe used for computer mobile hard disk main shaft sleeve |
| 02/12/2009 | US20090038359 Method of manufacturing seamless pipe or tube |
| 02/12/2009 | US20090038358 Method of manufacturing seamless pipe and tube |
| 02/04/2009 | EP1593441B1 Seamless metal tube producing method |
| 02/04/2009 | CN100457311C Apparatus and method for rectifing round pipe and tubing |
| 01/28/2009 | CN201186385Y Double machine frame oblique hot rolling minor diameter seamless steel pipe equipment |
| 01/28/2009 | CN101352728A Novel technique for producing large-sized seamless steel pipe |
| 01/22/2009 | WO2009011146A1 Pusher device for piercing-rolling process and seamless pipe manufacturing method using same |
| 01/21/2009 | CN100453670C Ni base alloy pipe stock and method for manufacturing the same |
| 01/14/2009 | EP2014747A1 Lubricant composition for hot plastic working and method of hot plastic working with the same |
| 01/07/2009 | CN101337236A Rolling mill technique of three-roller full-floating core rod tandem rolling tube |
| 01/06/2009 | CA2508446C Seamless metal tube producing method |
| 12/31/2008 | EP2008733A1 Process for producing seamless pipe |
| 12/31/2008 | CN201172058Y Three-roller corner tube mill |
| 12/30/2008 | US7469565 Manufacturing method and cleaning equipment for seamless tube |
| 12/25/2008 | US20080314109 Plug for use in piercing mill |
| 12/24/2008 | CN201168722Y Assembly type two-roller mill |
| 12/24/2008 | CN101327492A Process and system for manufacturing hot-rolled seamless tube |
| 12/17/2008 | EP2002904A1 Method of manufacturing seamless pipe |
| 12/10/2008 | CN101318200A Precision rolling process for heavy-caliber skew rolling reeling weldless steel tube |
| 12/10/2008 | CN100441326C Geometric model of new elongater for skew rolling tubular products |
| 12/03/2008 | EP1775038B1 Process for producing seamless steel pipe |
| 12/03/2008 | EP1651364B1 Apparatus for rectifing round pipe and tubing |
| 11/27/2008 | WO2008142803A1 Method, and apparatus, for piercing and rolling seamless pipe |
| 11/27/2008 | US20080289388 Piercing-rolling method and piercing-rolling apparatus for seamless tubes |
| 11/26/2008 | EP1993747A1 Tool for connecting and disconnecting tubulars |
| 11/26/2008 | EP1757376B1 Process for producing seamless steel pipe |
| 11/26/2008 | CN100435988C Method for manufacturing seamless steel pipe or tube |
| 11/20/2008 | WO2008138032A1 Panel and method of forming same |
| 11/20/2008 | DE102006053773B4 Verfahren zum Walzen eines Langguts in einem Walzwerk A method of rolling in a rolling mill of a Langguts |
| 11/12/2008 | EP1990107A1 PROCESS FOR PRODUCING HIGH-Cr SEAMLESS PIPE |
| 11/12/2008 | CN201147772Y Quick-lift attachment of three-roll skew rolling pipe mill |