| Patents for B21D 25 - Working sheet metal of limited length by stretching, e.g. for straightening (421) |
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| 06/15/2005 | CN1206054C Process for wall ironing of product in sheet form, and wall ironing tool |
| 04/07/2005 | DE10042197B4 Laser-Streckzieh-Bearbeitungseinrichtung für Blechteile und Verfahren Laser stretch forming machining equipment for sheet metal parts and procedures |
| 03/23/2005 | CN1193836C Plate and band material roll spacing adjustable flattening machine |
| 03/01/2005 | US6860135 Method for removing strain from press-formed workpiece, and forming press |
| 02/24/2005 | DE4345158B4 Verfahren und Vorrichtung zum Streckziehen von Halbzeugen Method and apparatus for stretch forming of semi-finished |
| 12/09/2004 | US20040244458 Die set for press forming metal sheet and press forming method of metal sheet |
| 12/02/2004 | WO2004103601A1 Press-formed body and press-forming method |
| 11/09/2004 | US6813924 Process for the wall ironing of a product in sheet form, and a wall ironing tool |
| 11/03/2004 | EP1159095B1 Process for the wall ironing of a product in sheet form, and a wall ironing tool |
| 10/05/2004 | US6799450 Method of stretch forming an aluminum metal sheet and handling equipment for doing the same |
| 08/19/2004 | DE10303458A1 Shaping method for thin metal sheet, involves finishing rough forming body to product shape using tool that moves three-dimensionally with mold punch as mold surface sandwiching sheet thickness while mold punch is kept under pushed state |
| 08/12/2004 | WO2004067202A1 Method and apparatus for in-situ leveling of progressively formed sheet metal |
| 08/12/2004 | CA2512245A1 Method and apparatus for in-situ leveling of progressively formed sheet metal |
| 08/10/2004 | US6772617 Method and apparatus for in-situ leveling of progressively formed sheet metal |
| 08/05/2004 | US20040148997 Shaping method and apparatus of thin metal sheet |
| 07/29/2004 | US20040144151 Method and apparatus for in-situ leveling of progressively formed sheet metal |
| 06/03/2004 | US20040103708 Manufacturing method of endless metal belt and manufacturing apparatus of endless metal belt |
| 06/02/2004 | EP1017514B1 Method for working a metallic strip |
| 06/01/2004 | US6742371 Forming-machine for sheet metal parts by stretching using a tool or form |
| 05/13/2004 | WO2004033127A3 Method of stretch forming an aluminum metal sheet and handling equipment for doing the same |
| 04/22/2004 | WO2004033127A2 Method of stretch forming an aluminum metal sheet and handling equipment for doing the same |
| 04/15/2004 | WO2004030843A1 Method and apparatus for forming three-dimensional shapes in a sheet metal |
| 04/15/2004 | US20040069038 Method of stretch forming an aluminum metal sheet and handling equipment for doing the same |
| 04/07/2004 | CN1486801A Method and equipment for producing ring metal strap |
| 03/17/2004 | CN1142041C Machining of sheet without removal material |
| 03/09/2004 | US6701766 Plate-stretching grip head |
| 03/03/2004 | EP1393833A1 Manufacturing method of endless metal belt and manufacturing apparatus of endless metal belt |
| 01/20/2004 | US6679091 Stretch bender |
| 01/13/2004 | US6675624 Method and device for producing a double-curved sheet-like object by means of stretch-forming |
| 11/20/2003 | WO2003095186A1 Fluid cell press with a gripping arrangement and method and use of the press |
| 11/19/2003 | EP1362650A2 Stretch-draw tool |
| 09/16/2003 | US6619094 Method and apparatus for forming a metal sheet under elevated temperature and air pressure |
| 09/03/2003 | EP1340557A2 Method for removing strain from press-formed workpiece, and forming press |
| 08/20/2003 | CN1436617A Method for eliminating strain of spun work and forming press |
| 08/07/2003 | US20030145643 Method for removing strain from press-formed workpiece, and forming press |
| 08/05/2003 | US6601426 Laser stretch-forming processing apparatus for sheet metal |
| 07/09/2003 | EP1091815B1 Device and method for shaping flat articles |
| 04/30/2003 | CN2547431Y C-shape shelf clamping device |
| 04/23/2003 | CN1411925A Plate and band material roll gap adjustable flattening machine |
| 01/21/2003 | US6508096 Process for drawing and stretching sheet metal |
| 01/07/2003 | US6503639 Press-formed product and press-forming method |
| 12/11/2002 | CN1095705C Device and method for shaping flat articles from blank and use of the device |
| 12/04/2002 | EP1262253A1 Stretch bender |
| 11/28/2002 | US20020174701 Stretch bender |
| 11/27/2002 | CN1381317A Forming machine for metal steel unit drawing by tool or 'mould' |
| 10/08/2002 | US6460391 Clamping assembly for sheet metal leveling machine |
| 10/02/2002 | DE10113668A1 Plattenstreckerkopf Plate straightener head |
| 09/26/2002 | US20020134129 Plate-stretching grip head |
| 09/25/2002 | EP1243352A2 Plate pulling head |
| 09/12/2002 | US20020124618 Forming-machine for sheet metal parts by stretching using a tool or form |
| 09/11/2002 | EP1238725A2 Metal plate forming apparatus by pulling over a die or "form" |
| 08/27/2002 | US6439022 Rolling apparatus |
| 08/08/2002 | US20020104360 Clamping assembly for sheet metal leveling machine |
| 08/01/2002 | US20020100308 Laser stretch-forming processing apparatus for sheet metal |
| 07/31/2002 | EP1047511B1 Stretch draw die and method |
| 07/25/2002 | US20020095967 Method and apparatus for forming a metal sheet under elevated temperature and air pressure |
| 07/04/2002 | DE10063287A1 Anordnung und Verfahren zum Umformen eines Metallbleches Arrangement and method for forming a metal sheet |
| 06/26/2002 | EP1216768A1 Device and method for forming a metal sheet |
| 06/26/2002 | EP0693981B1 Apparatus and method for the stretch forming of elongated hollow metal sections |
| 05/30/2002 | US20020062675 Method and device for producing a double-curved sheet-like object by means of stretch-forming |
| 03/27/2002 | CN1342109A Process for wall ironing of product in sheet form, and wall ironing tool |
| 03/21/2002 | DE10042197A1 Laser-Streckzieh-Bearbeitungseinrichtung für Blechteile Laser stretch forming machining equipment for sheet metal parts |
| 01/31/2002 | DE10134179A1 Verfahren und Einrichtung zur Herstellung im Streckformverfahren eines zweifach gekrümmten blechförmigen Gegenstands Method and apparatus for producing the stretch forming process of a doubly curved plate-shaped object |
| 12/20/2001 | DE10058367A1 Walzvorrichtung Rolling device |
| 12/05/2001 | EP1159095A1 Process for the wall ironing of a product in sheet form, and a wall ironing tool |
| 08/14/2001 | US6272897 Method of forming honeycomb panels into compound curved shapes |
| 07/17/2001 | US6260398 Forming of hollow extrusions with double plane bends and twists |
| 07/11/2001 | CN1303324A Device and method for shaping flat articles |
| 05/08/2001 | US6227027 Gripper means for stretcher leveler apparatus |
| 04/18/2001 | EP1091815A1 Device and method for shaping flat articles |
| 04/17/2001 | US6216521 Process for improving the planeness of a metal sheet |
| 03/14/2001 | CN1063110C Method for working hot-rolled stainless steel strip |
| 01/30/2001 | US6178796 Device and method for shaping flat articles |
| 01/17/2001 | CN1060692C Stretch controlled forming mechanism and method for forming metal blanks |
| 11/02/2000 | EP1047511A1 Stretch draw die and method |
| 09/08/2000 | WO2000051758A1 Process for the wall ironing of a product in sheet form, and a wall ironing tool |
| 08/29/2000 | US6109089 Universal device and method for gripping workpieces of various configurations |
| 07/12/2000 | EP1017514A1 A metallic strip and method and apparatus for working a metallic strip |
| 05/31/2000 | DE19853294A1 Vorrichtung zum Streckbiegen von Metallstäben oder -profilen Apparatus for stretching bending metal rods or profiles |
| 05/24/2000 | EP1002591A2 Apparatus for stretch-bending from metal rods or profiles |
| 05/16/2000 | US6063216 Working of a metallic strip |
| 05/09/2000 | US6058757 Machining of sheet by compression without removal of material |
| 04/25/2000 | US6053026 Block-set form die assembly |
| 04/20/2000 | DE19841629C1 Drawing machine for aligning metal strip has clamp at each end of bed with sprung jaws having offset faces to clamp work |
| 04/12/2000 | EP0992300A2 Process for stretch forming age-hardened aluminium alloy sheets |
| 04/04/2000 | US6044680 Machining of sheet without removal of material |
| 03/28/2000 | US6041639 Method and apparatus for stretch-forming and shearing sheet metal |
| 03/07/2000 | US6033499 Process for stretch forming age-hardened aluminum alloy sheets |
| 03/02/2000 | DE19939860A1 Sheet flatness, especially of high strength aluminum alloy sheet, is improved by a combination of tensile stretching and transverse compressive force application |
| 02/29/2000 | CA2097101C Gripper means for stretcher leveler apparatus |
| 02/01/2000 | US6018970 Stretch-forming machine with servo-controlled curving jaws |
| 12/28/1999 | US6006576 Super stretch draw die and method |
| 12/09/1999 | WO1999062652A1 Device and method for shaping flat articles |
| 11/16/1999 | CA2039705C Stretch shaping method and apparatus |
| 07/21/1999 | CN1223178A Machining of sheet without removal material |
| 07/14/1999 | EP0928648A2 Stretch-forming machine |
| 07/09/1999 | CA2256877A1 Stretch-forming machine with servo-controlled curving jaws |
| 06/08/1999 | US5910183 Stretch-forming machine with servo-controlled curving jaws |
| 05/19/1999 | EP0916421A1 Machining a sheet metal without removing material, by compressing |
| 05/19/1999 | EP0916419A1 Working of sheet without removing material, by drawing |