(19)
(11) EP 3 488 953 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
31.07.2019 Bulletin 2019/31

(43) Date of publication:
29.05.2019 Bulletin 2019/22

(21) Application number: 17845842.8

(22) Date of filing: 19.06.2017
(51) International Patent Classification (IPC): 
B23B 21/00(2006.01)
B23B 25/06(2006.01)
 B23B 3/16(2006.01)
B23B 29/24(2006.01)
(86) International application number:
PCT/JP2017/022471
(87) International publication number:
WO 2018/042832 (08.03.2018 Gazette 2018/10)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
MA MD

(30) Priority: 31.08.2016 JP 2016170350
07.09.2016 JP 2016174600

(71) Applicants:
  • Citizen Watch Co., Ltd.
    Tokyo 188-8511 (JP)
  • Citizen Machinery Co., Ltd.
    Nagano 389-0206 (JP)

(72) Inventors:
  • MAEHARA, Tomonori
    Kitasaku-gun Nagano 389-0206 (JP)
  • SHIDA, Tadayasu
    Kitasaku-gun Nagano 389-0206 (JP)
  • KATAOKA, Yohichi
    Kitasaku-gun Nagano 389-0206 (JP)

(74) Representative: Louis Pöhlau Lohrentz 
Patentanwälte Merianstrasse 26
90409 Nürnberg
90409 Nürnberg (DE)

   


(54) MACHINE TOOL


(57) To provide a machine tool that includes tool posts each having a tooth comb shape and can perform a wide variety of machining in multiple manners with a simple configuration. A machine tool includes a main spindle (7) movably supported in an axial direction, and two gang tool posts (27, 56) disposed opposed to each other with an axis of the main spindle (7) located therebetween. Each of the two gang tool posts is supported movably in X and Y directions that are perpendicular to the axial direction of the main spindle. Each of the two gang tool posts is provided with tools (19, 47) arranged parallel to each other in the Y direction. One of the two gang tool posts (56) is movably disposed in a Z direction that is a same direction as the axial direction of the main spindle (7). Any one of the two gang tool posts (27) is integrally provided with a turning tool base (34) that turnably supports tools (31) about a Y-axis along the Y direction.