(19)
(11) EP 1 252 955 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION

(48) Corrigendum issued on:
08.01.2003 Bulletin 2003/02

(43) Date of publication:
30.10.2002 Bulletin 2002/44

(21) Application number: 02006675.9

(22) Date of filing: 26.03.2002
(51) International Patent Classification (IPC)7: B23C 5/10, B23C 5/20
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 26.04.2001 JP 2001130099
24.07.2001 JP 2001222800
24.07.2001 JP 2001222801
24.07.2001 JP 2001222802
25.07.2001 JP 2001224810

(71) Applicant: MITSUBISHI MATERIALS CORPORATION
Chiyoda-ku, Tokyo (JP)

(72) Inventors:
  • Horiike, Nobukazu, Mitsubishi Materials Corp.
    Yuuki-gun, Ibaraki-ken (JP)
  • Kitajima, Jun, Mitsubishi Materials Corp.
    Yuuki-gun, Ibaraki-ken (JP)
  • Ikenaga, Kouichi, Mitsubishi Materials Corp.
    Yuuki-gun, Ibaraki-ken (JP)
  • Shimomura, Hiroshi, Mitsubishi Materials Corp.
    Yuuki-gun, Ibaraki-ken (JP)

(74) Representative: HOFFMANN - EITLE 
Patent- und Rechtsanwälte Arabellastrasse 4
81925 München
81925 München (DE)

   


(54) Indexable insert


(57) The present invention provides an indexable insert (10) which can pare away the chip stably without increase of cutting resistance. With this insert, serrations are formed by arranging a plurality of groove portions and ridge portions alternatingly upon side ridge edge portions of the upper surface (12), with the exception of sloping surfaces (12A) which are formed at both end portions in the longitudinal directions of the upper surface. As a result, the cutting edges exhibit wavy shapes which are made up from this plurality of groove portions (14) and ridge portions (15) over the sloping surface, with the exception of these sloping surfaces. Furthermore, the groove portions and the ridge portions of the serrations are made as curved surfaces.