Global Patent Index - EP 1844874 A1

EP 1844874 A1 2007-10-17 - METHOD AND DEVICE FOR UPSETTING

Title (en)

METHOD AND DEVICE FOR UPSETTING

Title (de)

VERFAHREN UND VORRICHTUNG ZUR STAUCHUNG

Title (fr)

PROCÉDÉ ET DISPOSITIF DE REFOULEMENT

Publication

EP 1844874 A1 (EN)

Application

EP 06712606 A

Priority

  • JP 2006301463 W
  • JP 2005024121 A
  • US 64955305 P

Abstract (en)

A method and a device for upsetting capable of non-uniformly increasing the diameter of the unintended part of a material in the circumferential direction. The method comprises a step of preparing a guide (20) having an insertion hole (21) in which the unintended part (2) of the material (1) is inserted and held in a buckling prevented state. In the device, a projected part (22) for suppressing an increase in diameter projecting in the axial direction of the guide (20) is integrally formed at a part of the tip part (20a) of the guide (20). The method also comprises a step of holdingly inserting the intended part (2) of the material (1) fixed to a fixed die (10) into the insertion hole (21) of the guide (20) and, while axially pressurizing the intended part (2) of the material (1) with a punch (30) by moving the punch (30), moving the guide (20) in an opposite direction to the moving direction of the punch (30) to increase the diameter of the intended part (2) of the material (1) exposed between the tip part (20a) of the guide (20) and the fixed die (10) in the state of suppressing an increase in the diameter of the contact part of the intended part (2) with the projected piece part (22).

IPC 8 full level (invention and additional information)

B21J 5/08 (2006.01); B21K 1/10 (2006.01)

CPC (invention and additional information)

B21J 5/08 (2013.01); B21K 1/766 (2013.01)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

EPO simple patent family

EP 1844874 A1 20071017; EP 1844874 A4 20100505; KR 20070099005 A 20071008; WO 2006080499 A1 20060803

INPADOC legal status


2011-03-02 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20100706

2010-05-05 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20100406

2008-05-07 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) DELETED

2007-10-17 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20070731

2007-10-17 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR