| Patents for B21B 17 - Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling (1,014) |
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| 07/01/2009 | EP1611969B1 Method and apparatus for producing pipe, wall thickness variation-obtaining device, and computer program |
| 07/01/2009 | CN101468359A Five-machine frame restraint core rod continuous rolling mill for reducing consumption of roller and core rod |
| 06/30/2009 | CA2403830C High-workability steel pipe and method of producing same |
| 06/17/2009 | CN101460264A Retained mandrel rolling mill for seamless tubes |
| 06/11/2009 | US20090145193 Method for producing ultra thin wall metallic tube by cold rolling method |
| 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 |
| 06/03/2009 | CN101448585A Method for production of seamless pipe, and oxidizing gas supply apparatus |
| 05/20/2009 | CN201239736Y Roller of heavy caliber thin wall seamless steel pipe cold rolling mill |
| 05/20/2009 | CN201239735Y Multi-roller heavy caliber thin wall seamless pipe rolling mill |
| 05/20/2009 | CN100489263C Technology for manufacturing collar thick-wall seamless steel pipe |
| 05/13/2009 | CN100486723C Reciprocatting type pipe mill with long stroke |
| 05/06/2009 | EP2055399A1 Mandrel bar cleaning facility |
| 05/06/2009 | CN101426594A Process for producing stainless-steel pipe |
| 05/06/2009 | CN100484652C Changeover system and changeover method for a metal forming mill |
| 05/05/2009 | CA2431090C Method of and apparatus for determining the eccentricity of a hollow billet |
| 04/28/2009 | CA2519093C Method and apparatus for producing pipe, wall thickness variation-obtaining device, and computer program |
| 04/22/2009 | EP2002903A9 Method for production of seamless pipe, and oxidizing gas supply apparatus |
| 04/15/2009 | CN101410542A High-strength seamless steel pipe for mechanical structure which has excellent toughness and weldability, and method for manufacture thereof |
| 04/15/2009 | CN101410194A Cold finish seamless steel pipe for drive shaft and method for producing the same |
| 04/09/2009 | US20090090153 Retained mandrel rolling mill for seamless tubes |
| 04/08/2009 | EP2045026A1 Method and device for controlling sizing mill of pipe or tube |
| 04/07/2009 | CA2474290C Method of manufacturing seamless steel pipe |
| 04/01/2009 | CN101400455A 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 |
| 03/19/2009 | WO2009035106A1 Roll forming device |
| 03/12/2009 | WO2009030105A1 Manufacturing technique of seamless steel pipe |
| 03/12/2009 | US20090064749 Process for producing stainless steel pipe |
| 03/04/2009 | CN101376204A Novel technique for producing seamless steel pipe |
| 03/04/2009 | CN100464885C A manufacturing method of seamless steel tubes |
| 02/25/2009 | EP2028284A1 High-strength seamless steel pipe for mechanical structure which has excellent toughness and weldability, and method for manufacture thereof |
| 02/25/2009 | EP2026917A1 Retained mandrel rolling mill for seamless tubes |
| 02/12/2009 | US20090038360 Method for producing ultra thin wall metallic tube with cold working process |
| 02/11/2009 | CN201192774Y Equipment for longitudinally hot-rolling small diameter thin wall seamless steel pipe with fewer stands |
| 02/03/2009 | CA2519815C Method of manufacturing seamless tube |
| 01/21/2009 | EP2017019A1 Method and device for the manufacture of metal tubes with oval or elliptical section |
| 01/14/2009 | EP2014378A1 Process for producing stainless-steel pipe |
| 01/14/2009 | CN101344193A Tubular product and manufacturing method and manufacturing device thereof |
| 01/13/2009 | US7475582 Changeover system and changeover method for a metal forming mill |
| 01/13/2009 | CA2550913C Cold rolling process for metal tubes |
| 01/06/2009 | CA2550931C Cold rolling process for metal tubes |
| 12/31/2008 | EP2008732A1 Cold finish seamless steel pipe for drive shaft and method for producing the same |
| 12/31/2008 | EP2008731A1 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 |
| 12/24/2008 | EP1915223B1 Rolling mill with stands with three adjustable rolls |
| 12/24/2008 | DE102007028710A1 Herstellungsverfahren für Rohre...... Preparation methods for pipes ...... |
| 12/23/2008 | CA2388480C Welded steel pipe having excellent hydroformability and method for making the same |
| 12/17/2008 | EP2002903A2 Method for production of seamless pipe, and oxidizing gas supply apparatus |
| 12/17/2008 | CN101322978A Cold machining and molding method of magnesium alloy pipes |
| 12/04/2008 | WO2008146493A1 Mandrel mill and process for manufacturing seamless pipe |
| 12/03/2008 | EP1775038B1 Process for producing seamless steel pipe |
| 11/27/2008 | US20080289391 Pipe or Tube Reducing Mill and Roll For Reducing Mill |
| 11/26/2008 | EP1757376B1 Process for producing seamless steel pipe |
| 11/26/2008 | CN201154367Y Five-frame restraint core rod tandem mill for reducing consume of roller and core rod |
| 11/19/2008 | CN101306436A Rolling unit of boiler tube for hydrocracking arrangement |
| 11/19/2008 | CN100434561C Steel in use for soldering pressure pipe in hydraulic power station under large line energy, and manufacturing method |
| 11/05/2008 | CN101300088A Hollow bar manufacturing process |
| 11/05/2008 | CN101298084A Technique for processing D type copper pipe with unequal-radius wall thickness or equal-radius wall thickness |
| 10/30/2008 | WO2008128417A1 Seamless steel tube four-roller-type heat sizing mill |
| 10/23/2008 | WO2008126633A1 Process for manufacturing seamless pipe |
| 10/22/2008 | CN201135993Y Three-high mill |
| 10/16/2008 | WO2008123363A1 Cold-finished seamless steel pipe for integrally molded drive shaft, drive shaft using the pipe, and method for manufacturing the cold-finished seamless steel pipe |
| 10/16/2008 | WO2008123276A1 Seamless pipe manufacturing method |
| 10/16/2008 | WO2008123121A1 Method for producing seamless pipe and hole type roll |
| 10/09/2008 | DE102006026011A1 Tube element locking method, involves using uneven tools during shaping of tubes, and using bolt with middle increase on front side, and providing bolt with tooth and/or grooves, which bring forward material flow of tubes |
| 10/01/2008 | CN101277772A Device and method for detecting flaw of tube stock |
| 09/18/2008 | WO2008111670A1 Process for manufacturing seamless pipe |
| 09/17/2008 | CN101264483A Rolling control method for mandrel mill, rolling control device, control program, and seamless tube |
| 09/16/2008 | US7424816 Roll stand for rolling bar-shaped or tubular stock |
| 09/10/2008 | CN101259588A Fewer stands longitudinal hot rolling minor diameter thin wall seamless steel tube rolling technique and equipment thereof |
| 09/03/2008 | CN101254507A Method for manufacturing seamless pipes or tubes |
| 08/20/2008 | CN100411759C Method and device for adjusting rolling positions of reduction rolls in three-roll mandrel mill |
| 08/14/2008 | WO2008096864A1 Reducer pass roll and reducer |
| 08/13/2008 | EP1954415A1 Hollow bar manufacturing process |
| 08/13/2008 | CN100409956C Method and device for controlling fixed diameter rolling of tube |
| 08/13/2008 | CN100409953C Tube manufacturing method and apparatus for fixed diameter rolling |
| 08/07/2008 | US20080184766 Straightening rotor, rotor straightener and straightening method |
| 08/06/2008 | CN101234397A Cold rolling coning pipe fitting mold |
| 07/31/2008 | DE102007004214A1 Walzwerk zur Herstellung nahtloser Rohre und Verfahren zum Betreiben eines Walzwerks Rolling mill for manufacturing seamless tubes and method for operating a rolling mill |
| 07/30/2008 | EP1949979A1 Rolling mill for manufacturing seamless pipes and method for operating a rolling mill |
| 07/30/2008 | CN101232956A Rolling mill with stands with three adjustable rolls |
| 07/23/2008 | EP1946859A1 Method for manufacturing seamless pipes or tubes |
| 07/17/2008 | WO2008084630A1 Rolling stand |
| 07/16/2008 | EP1293580B1 High carbon steel pipe excellent in cold formability and high frequency hardenability and method for producing the same |
| 07/09/2008 | CN101214512A Technique for processing copper pipe for high-precision magnetic controlled anode barrel |
| 07/09/2008 | CN101214498A Two-roller reversible longitudinal tube-rolling technique |
| 07/02/2008 | CN101209458A Method for rolling tube by hot-rolled seamless tube restraint core rod continuous rolling mill |
| 06/26/2008 | US20080148795 Method for producing ultra thin wall metallic tube with cold working process |
| 06/25/2008 | CN101208160A Process for producing seamless tube |
| 06/25/2008 | CN100396392C Method of measuring misalignment of multi-stage rolling mill and measuring device therefor |
| 06/11/2008 | CN101195129A Double-roller tandem rolling tube machine group for edge finish upward transmission |
| 06/11/2008 | CN101195125A Three-high mill |
| 05/15/2008 | WO2008056540A1 Mandrel mill, its operating method, and seamless pipe manufacturing method |
| 05/07/2008 | EP1918034A1 Device and method for detecting flaw on tube |
| 05/02/2008 | WO2008050627A1 Mandrel mill and process for manufacturing seamless pipe |
| 04/30/2008 | EP1915223A1 Rolling mill with stands with three adjustable rolls |
| 04/30/2008 | CN100384553C Seamless steel tube for drive shaft and method for manufacturing the same |
| 04/23/2008 | CN201049356Y Roller depressing device for three-roller limiting mandrel tandem rolling pipe machine |
| 04/16/2008 | EP1911533A1 Drawing/rolling control method |
| 04/16/2008 | CN101163559A Manufacturing method of seamless pipe and cleaning equipment |
| 04/09/2008 | CN101160184A Manufacturing method of seamless steel pipe |
| 04/02/2008 | CA2602994A1 Annular gas turbine engine case and method of manufacturing |
| 04/02/2008 | CA2602981A1 Annular gas turbine engine case and method of manufacturing |