| 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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| 08/18/2010 | CN101804564A High-efficiency short-flow production line of composite material of high-alloy steel and high-alloy steel |
| 08/18/2010 | CN101804418A Grouping double-roller diameter fixing and reducing machine |
| 08/18/2010 | CN101439359B Material pushing apparatus with movable joint for inlet station of perforating machine |
| 08/18/2010 | CN101151108B Method for producing seamless tube |
| 08/11/2010 | CN101797586A Hot sizing device with four-roll five-machine frame rolling mill and production method thereof |
| 08/11/2010 | CN101797585A Two-roller skew-rolling cold piercing and cold broaching machine for metal ingot |
| 08/04/2010 | CN101791628A Cooling tank device of hot-rolling perforation machine set |
| 08/04/2010 | CN101791627A Method for rolling large-caliber seamless steel tube by using disc roller rotary-rolling pipe expander |
| 07/28/2010 | EP2210682A1 Method and apparatus for spinning |
| 07/28/2010 | CN101209462B Center alignment degree integral measurement method for steel tube punching machine three-roller centring device |
| 07/20/2010 | US7757528 Method of manufacturing seamless pipe or tube |
| 07/15/2010 | US20100175450 Method of producing seamless metal tube and punch for use therein |
| 07/14/2010 | CN201524695U On-line axial movement adjusting tooling of main speed reducer output shaft of steel pipe puncher |
| 07/14/2010 | CN101530869B Process for manufacturing stainless-steel seamless steel pipe used for high-pressure boiler and heat-exchanger |
| 07/14/2010 | CN101380644B Quick replacement device of guide plate rack on large caliber perforating machine |
| 07/14/2010 | CN101380642B Method for assembling piercer roll of hot-rolled seamless tube and locking rotor drum |
| 07/07/2010 | CN1695839B Roller trio skew rolling method for cold perforating and cold chambering ingot |
| 06/30/2010 | CN101758073A Diagonal rolling double-roller puncher having cast-weld structure |
| 06/23/2010 | CN201511039U Self-locking type guide plate locking device |
| 06/23/2010 | CN101746588A Seamless steel tube blank conveyer device and conveying method |
| 06/22/2010 | US7739892 Method of manufacturing seamless pipes |
| 06/22/2010 | CA2491834C Martensitic stainless steel seamless pipe and a manufacturing method thereof |
| 06/16/2010 | CN201505665U Device for circularly replacing ejector rod of perforator |
| 06/16/2010 | CN101743074A Pusher device for piercing-rolling process and seamless pipe manufacturing method using same |
| 06/16/2010 | CN101733276A Technology for producing steel pipe by drawing down and piercing |
| 06/10/2010 | US20100139352 Method for cr-plating of mandrel bars, the mandrel bar, and process for producing seamless tubes using the method and the mandrel bar |
| 06/10/2010 | DE102008061141A1 Verfahren zur Herstellung nahtloser Rohre mittels eines Drei-Walzen-Stangenwalzwerks A process for the production of seamless tubes by a three-roll mill rod |
| 06/09/2010 | CN101428296B Pre-rotation apparatus for large-scale punching machine post rod |
| 06/09/2010 | CN101394943B Process for producing high-Cr seamless pipe |
| 06/02/2010 | CN101716598A Process for producing large-caliber steel pipe through mandril circulation |
| 06/02/2010 | CN101405096B Method for manufacturing seamless pipe |
| 06/02/2010 | CN101249514B Assembled duo mill |
| 05/26/2010 | CN201482792U Direct pressure type three-roller continuous mill |
| 05/26/2010 | CN201482791U Three-roller sizing and reducing mill set with novel structure |
| 05/26/2010 | CN201482790U 改进后的均整机 Both whole improved |
| 05/26/2010 | CN201482789U Precise conducting roller structure of billet hot punch |
| 05/26/2010 | CN1898037B Lubricant supply system and apparatus and method for manufacturing seamless pipe |
| 05/19/2010 | CN201470677U Composite piercing plug |
| 05/19/2010 | CN101708511A Method for manufacturing pure titanium seamless tubes |
| 05/19/2010 | CN101161361B Rack gearing of punching machine jogger thrust carriage |
| 05/12/2010 | CN101190444B Method for manufacturing titanium or titanium alloy tube of 12 to 16 meters |
| 05/11/2010 | US7712345 Main beam fabrication procedure and system for making a main beam for warehouse framework |
| 05/06/2010 | US20100107714 Pusher device for piercing and rolling and method of manufacturing seamless pipe or tube using the same |
| 05/06/2010 | US20100107713 Method and device for rolling a rolling stock in a rolling mill with a cross-rolling mill |
| 05/05/2010 | CN201446126U Four-roller obliquely rolling machine of multiple standards of externally threaded anchor rods |
| 04/27/2010 | US7703209 Powered wet-shaving razor |
| 04/21/2010 | CN101190443B Method for manufacturing super-long titanium or titanium alloy tube |
| 04/15/2010 | US20100089111 Piercer, Plug and Method of Manufacturing Seamless Pipe or Tube |
| 04/07/2010 | CN101190446B Method for manufacturing super-long titanium or titanium alloy tube of 12-16 meters |
| 03/31/2010 | EP2168696A1 Pusher device for piercing-rolling process and seamless pipe manufacturing method using same |
| 03/31/2010 | CN101683661A Method for improving rolling quality of barrel-shaped puncher for rolling hollow billet |
| 03/24/2010 | CN100595027C Two-stand angularly hot rolling minor diameter seamless steel tube rolling technique and equipment thereof |
| 03/11/2010 | US20100058824 Monitoring apparatus and monitoring method of seamless pipe or tube production conditions and manufacturing facilities of seamless pipe or tube |
| 03/03/2010 | CN101658866A Direct pressure three-roller continuous rolling mill |
| 03/03/2010 | CN101658865A Three-roller sizing and reducing machine set of novel structure |
| 03/03/2010 | CN101658864A Novel process for manufacturing thick-wall seamless steel tube |
| 02/24/2010 | CN101653781A Perforation production new technique of hot rolling large-diameter steel pipe |
| 02/23/2010 | CA2633376C Process for manufacturing a seamless tube |
| 02/17/2010 | CN101652196A Boring machine |
| 02/10/2010 | CN201399477Y Double-motor driving device of pin-lift car of piercing mill |
| 02/10/2010 | CN100588474C Compound drag links and operation device thereof |
| 02/02/2010 | US7654122 Process for straightening a tube |
| 01/13/2010 | CN201380186Y Centering roller device |
| 01/13/2010 | CN101623704A Multi-roll large-diameter thin-wall seamless pipe mill |
| 01/06/2010 | CN201375993Y Mandril monitoring device |
| 12/30/2009 | CN201371160Y Pass for seamless steel pipe rolling mill |
| 12/30/2009 | CN100574909C Method for manufacturing seamless pipes or tubes |
| 12/23/2009 | CN101610854A Device and method for monitoring manufacturing status of seamless pipe and seamless pipe manufacturing facility |
| 12/17/2009 | US20090308125 Mandrel mill and process for manufacturing a seamless pipe |
| 12/16/2009 | CN101605616A Process for producing seamless steel pipe made of high-chromium high-nickel alloy steel |
| 12/10/2009 | WO2009147087A1 Rolling mill of rotating expander type for tubular bodies with tip-stabilizing system |
| 12/10/2009 | US20090301155 Method of manufacturing seamless pipes |
| 12/09/2009 | EP2130621A1 Boring machine |
| 12/09/2009 | CN201357165Y Heat rolling seamless steel pipe sizing mill |
| 12/02/2009 | EP2127767A1 Process for producing seamless steel pipe made of high-chromium high-nickel alloy steel |
| 11/25/2009 | CN100562587C Process for heating titanium oblique perforating rod ingot |
| 11/18/2009 | CN101579702A New technique for producing high alloy steel high-end pipe by adopting cross rolling elongation technology |
| 11/12/2009 | DE102008022161A1 Walzvorrichtung zum Schrägwalzen von rohr- oder stabförmigem Walzgut Rolling device for rotary forging of tubular or rod-shaped rolling |
| 11/05/2009 | DE202007018926U1 Vorrichtung zum Schrägwalzen von rohr- oder stabförmigem Walzgut Apparatus for rotary forging of tubular or rod-shaped rolling |
| 10/28/2009 | EP2111932A1 Method for manufacturing seamless pipes or tubes |
| 10/28/2009 | CN201334226Y Tube blank delivery mechanism |
| 10/28/2009 | CN100554475C Fe-Ni alloy pipe stock and method for manufacturing the same |
| 10/21/2009 | CN101559448A Evacuation device for mandril of perforator |
| 10/21/2009 | CN101559436A Quick connecting device for punch top and mandril of perforator |
| 10/21/2009 | CN100551568C Steel tube punching machine three-roller centering device center alignment degree on-line measurement method |
| 10/21/2009 | CN100551564C Boring machine, plug, and method of manufacturing seamless steel tube |
| 10/13/2009 | US7600406 Apparatus for rectifying round pipe and tubing |
| 10/13/2009 | CA2532531C Adjustable horn for spiral pipe forming machine |
| 10/08/2009 | WO2009122620A1 Method of producing seamless metal tube and punch for use therein |
| 10/07/2009 | CN201320552Y Mandrel pre-rotating device for piercing mill mandrel thrust block |
| 10/07/2009 | CN101553327A Manufacturing method for seamless pipe |
| 10/01/2009 | WO2009119245A1 Method for producing seamless pipe |
| 10/01/2009 | WO2009118957A1 High-alloy seamless steel pipe manufacturing method |
| 09/16/2009 | CN201308906Y Composite drag chain and an operating device thereof |
| 09/16/2009 | CN101530869A Process for manufacturing stainless-steel seamless steel pipe used for high-pressure boiler, boiler and heat-exchanger |
| 09/15/2009 | CA2551246C Lubricant supply system and apparatus and method for manufacturing seamless pipe |
| 09/09/2009 | EP2098310A1 Manufacturing method for seamless pipe |
| 09/09/2009 | CN101524714A Machining method for compression resistance protective tube of oilfield exploration locator |
| 09/09/2009 | CN101524713A Improved locking top structure |
| 09/09/2009 | CN100537067C Flat roll finishing mill for processing steel cylinder pipe |