(19)
(11) EP 1 582 276 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.12.2005 Bulletin 2005/52

(43) Date of publication A2:
05.10.2005 Bulletin 2005/40

(21) Application number: 05006968.1

(22) Date of filing: 30.03.2005
(51) International Patent Classification (IPC)7: B21H 3/02, B21H 3/06
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR LV MK YU

(30) Priority: 31.03.2004 JP 2004103839

(71) Applicant: Kabushiki Kaisha Sanmei Seisakusho
Aichi 486-0839 (JP)

(72) Inventors:
  • Taniguchi, Naoshige
    Kasugai-shi Aichi (JP)
  • Nonaka, Yoshio
    Kasugai-shi Aichi (JP)
  • Hayashi, Norishige
    Inuyama Aichi (JP)
  • Masuo, Kazuhiko
    Kasugai-shi Aichi (JP)

(74) Representative: Viering, Jentschura & Partner 
Steinsdorfstrasse 6
80538 München
80538 München (DE)

   


(54) Rolling die


(57) A rolling die (2,10) is provided. The rolling die (2,10) includes a bite portion (6,16) having bite processing teeth at a bite starting point for a workpiece, and a finishing portion (7,17) having finishing processing teeth. The bite processing teeth at the starting point in the bite portion (6,16) have lower tooth height than the finishing processing teeth in the finishing portion (7,17). The bite processing teeth have a larger tooth tip angle and a larger trough angle than the finishing processing teeth.






Search report