| 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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| 12/10/2003 | EP1369664A1 Method and device for measuring the excentricity of a hollow block |
| 12/10/2003 | CN2590679Y Three-roller planetary rolling mill roller for rolling copper & copper alloy pipes |
| 11/26/2003 | CN2587540Y Novel mannesmann type piercing-roller type |
| 11/26/2003 | CN2587539Y Three-roller planetary copper pipe rolling machine |
| 11/25/2003 | US6651473 Cold-rolling seamless copper tubing |
| 11/19/2003 | CN2586546Y Three-roller planet tube mill |
| 11/12/2003 | CN1127383C Seamless steel pipe manufacturing method and equipment |
| 10/09/2003 | DE19935647C2 Verfahren zum Walzen von erwärmtem metallischem Gut und Anlage zur Durchführung des Verfahrens A method of rolling heated metallic materials and plant for carrying out the method |
| 09/23/2003 | US6622379 Lift cam mechanism for electronic parts mounting apparatus |
| 09/17/2003 | CN1442244A Reciprocating rolling technology of seamless steel pipe |
| 09/10/2003 | CN1440841A Conic perforator |
| 09/03/2003 | CN2569933Y Multi-roller planetary tube grimper |
| 07/17/2003 | WO2003057383A1 Method and rolling stand for producing rods, bar stock or seamless tubes |
| 07/09/2003 | CN1429279A Martensitic stainless steel and seamless steel pipes produced with it |
| 06/11/2003 | CN2555113Y High speed seamless pipe cold-roll |
| 04/30/2003 | CN1107123C Heat resistant Austenitic stainless steel |
| 04/16/2003 | CN2544849Y Sizing device |
| 04/15/2003 | US6546772 Rolling mill, especially for inclined or Diescher rolling |
| 03/12/2003 | CN2539582Y Circular billet double-end heating centring device |
| 02/26/2003 | EP1285097A1 Martensitic stainless steel and seamless steel pipes produced with it |
| 02/19/2003 | EP1284167A1 Method for manufacturing seamless steel pipe |
| 01/15/2003 | CN1390678A Warm machining method for making titanium or Ti-alloy pipe |
| 01/15/2003 | CN1390677A Warm machining method for making copper or cu alloy pipe |
| 12/24/2002 | US6497129 Method for rolling tube blanks in a planetary skew rolling mill |
| 11/26/2002 | US6485679 Heat resistant austenitic stainless steel |
| 11/13/2002 | CN1378887A Technology and apparatus for making hollow circular workpiece with square billet |
| 10/08/2002 | US6460389 Method and apparatus for rolling of heated metallic products |
| 10/03/2002 | WO2002076654A1 Method for manufacturing seamless steel pipe |
| 09/25/2002 | CN1370640A Seamless copper tube cold rolling process |
| 08/29/2002 | US20020116971 Cold-rolling seamless copper tubing |
| 08/29/2002 | DE10107567A1 Verfahren zum Kaltwalzen von nahtlosen Kupferrohren A method for cold-rolling of seamless copper tubing |
| 08/22/2002 | DE10105827A1 Vorrichtung zum spanlosen Umformen von langgestreckten Werkstücken Apparatus for chipless forming elongated workpieces |
| 08/21/2002 | EP1232808A2 Method for cold rolling seamless copper pipes |
| 08/15/2002 | WO2002062506A1 Device for forming elongated workpieces without chip removal |
| 08/07/2002 | CN1362297A Dynamicaly balanced two-roller layer-bore poppet puncher |
| 07/18/2002 | WO2002055226A1 Method and apparatus for manufacturing tubes by rolling |
| 06/27/2002 | WO2002049781A1 Method and apparatus for manufacturing tubes |
| 04/10/2002 | EP1194606A1 Heat resistant austenitic stainless steel |
| 04/03/2002 | EP0754503B1 Method and apparatus for piercing seamless metal pipe |
| 03/13/2002 | CN1340109A Heat resistant austenitic stainless steel |
| 02/21/2002 | US20020020201 Method for rolling tube blanks in a planetary skew rolling mill |
| 01/30/2002 | EP0842715B1 Seamless steel pipe manufacturing method and equipment |
| 01/03/2002 | US20020000113 Rolling mill, especially for inclined or diescher rolling |
| 01/02/2002 | EP1166907A2 Method of rolling tube blanks in a planetary skew rolling mill |
| 01/02/2002 | CN1328886A Method for rolling pipe billet in planary web roll piercing mill |
| 12/20/2001 | DE10126411A1 Angled planetary rolling of tube blanks is effected with continuous end-to-end supply, controlling rotation and advance of successive tube |
| 12/14/2001 | CA2350358A1 Method for rolling tube blanks in a planetary skew rolling mill |
| 11/22/2001 | WO2001088210A1 Martensitic stainless steel and seamless steel pipes produced with it |
| 11/22/2001 | DE10024246A1 Lochdorn zum Schrägwalzen von metallischen Hohlkörpern auf Schrägwalzwerken Piercer to skew rolls of metallic hollow bodies on inclined rolling mills |
| 11/22/2001 | CA2409158A1 Martensitic stainless steel and seamless steel pipes produced with it |
| 11/21/2001 | EP1155754A2 Mandrel for skew rolling of metallic hollow bodies in skew rolling mills |
| 11/14/2001 | EP0828007B1 Process for producing high-strength seamless steel pipe having excellent sulfide stress cracking resistance |
| 11/07/2001 | EP1151808A2 Rolling mill, in particular skew rolling mill or Diescher rolling mill, of modular construction |
| 10/31/2001 | DE10020702A1 Walzwerk, insbesondere Schräg- oder Diescherwalzwerk, in Modulbauweise Rolling mill, especially inclined or Diescherwalzwerk, in modular design |
| 10/10/2001 | CN2452634Y Dynamic and stable type two roller large diameter mushroom like puncher |
| 09/05/2001 | CN1070528C Lubricant compsns. for heat working |
| 07/31/2001 | US6266987 Disk roll exchanging apparatus for vertical piercing mill and disk roll exchanging method |
| 07/17/2001 | US6260396 2-Roll piercing mill and method of producing hollow blocks from high alloy steels |
| 07/04/2001 | CN1067921C Method and device for producing hollow body from solid round steel |
| 07/03/2001 | US6253593 Piercer roll exchanging apparatus for vertical piercing mill and piercer roll exchanging method |
| 06/21/2001 | DE10020131C1 Fabrication method for hot-finished seamless tube of high-temperature steel ingot is heated and punched into hollow block to dimensions close to hot rolling in pilger mill |
| 05/23/2001 | CN1066075C Method for making square section steel pipe |
| 05/16/2001 | CN1065784C Alignment of rollers |
| 04/18/2001 | CN1291533A Manufacturing method of square steel tube and round steel tube |
| 04/18/2001 | CN1291532A Manufacturing method of square steel tube and round steet tube |
| 03/20/2001 | US6202463 Plug and mandrel bar for seamless steel pipe rolling operation for manufacturing seamless steel pipe |
| 03/07/2001 | CN1062785C Method for producing seamless hot-finished tube |
| 02/14/2001 | CN1061906C Three roller extension diameter-reducing system |
| 02/08/2001 | DE19935647A1 Hot rolling of wire, rod or seamless tube is carried out in mill using as many of the same units as possible lines |
| 02/07/2001 | CN1061569C Method and apparatus for piercing seamless metal pipe |
| 01/17/2001 | CN2414854Y Three-roller planetary pipe mill |
| 01/17/2001 | CN1060696C Process for hollow stainless-steel pipe smelting and rolling |
| 12/20/2000 | EP1060804A1 Apparatus and method for changing piercer roll of vertical piercing mill |
| 12/20/2000 | EP1060803A1 Apparatus and method for changing disc roll of vertical piercing mill |
| 12/20/2000 | EP1060802A1 Piercing mill |
| 12/12/2000 | US6158262 Piercing mill and cannon exchange method |
| 10/25/2000 | EP1046435A1 Piercing mill and method of changing cannon |
| 09/28/2000 | DE19858955C2 Verfahren zur Verminderung trompetenförmiger Aufweitungen am vorderen Rohrende A method for reducing trumpet-shaped expansions at the front end of the pipe |
| 09/07/2000 | DE19908995A1 Umformwerkzeug zur Umformung von rotationssymmetrischen Werkstücken Shaping tool for shaping of rotationally symmetrical workpieces |
| 09/06/2000 | EP1033187A1 Forming tool for forming rotationally symmetrical workpieces |
| 08/24/2000 | WO2000049191A1 Heat resistant austenitic stainless steel |
| 08/02/2000 | EP1023952A1 Dual roll cross-rolling mill and method for rolling hollow billets of high-alloy steels |
| 07/27/2000 | DE19903974A1 2-Walzen-Schrägwalzwerk und Verfahren zur Herstellung von Hohlblöcken aus hochlegierten Stählen 2-roll cross-rolling mill and process for the production of hollow blocks of high-alloy steels |
| 07/26/2000 | EP1022068A1 Piercing mill |
| 07/18/2000 | US6089066 Process for the production of seamless tubes |
| 06/21/2000 | EP1010477A1 Plug and mandrel bar for rolling of seamless steel pipe and method of manufacturing seamless steel pipe |
| 06/21/2000 | DE19858955A1 Verfahren zur Verminderung trompetenförmiger Aufweitungen am vorderen Rohrende A method for reducing trumpet-shaped expansions at the front end of the pipe |
| 06/14/2000 | EP1008400A2 Method for reducing trumpet-shaped widenings on the leading end of a pipe |
| 06/13/2000 | US6073331 Method for manufacturing seamless pipe |
| 05/18/2000 | DE19852537A1 Extrusion process for producing seamless hollow body with one closed end, involving forming closed end of hollow block when holing it, displacing material from edge towards center |
| 05/16/2000 | US6061900 Lift cam mechanism for electronic parts-mounting apparatus |
| 04/19/2000 | CN1051482C Design method forpiercing head for rolling thin-wall hollow billet in two high mill |
| 02/17/2000 | DE19836178A1 Planetary skew rolling mill for production of pipes comprises a rotatable carrier housing for rolling heads which is made up of two coaxial cup-shaped bodies with open ends facing one another |
| 02/15/2000 | US6024808 Seamless steel pipe manufacturing method and equipment |
| 12/28/1999 | US6006570 Method and device for producing a hollow body from solid round steel |
| 11/16/1999 | US5983689 Lubricant for use in hot work |
| 09/29/1999 | EP0886550B1 Method and device for producing a hollow body from solid round steel |
| 09/29/1999 | CN1230138A Plug and mandrel bar for rolling of seamless steel pipe and method of mfg. seamless steel pipe |
| 09/23/1999 | DE19750686C1 Verfahren zum Herstellen einer Zylinderlaufbuchse A method of manufacturing a cylinder liner |
| 09/08/1999 | EP0940193A2 Process for the production of seamless tube |