(19)
(11) EP 2 724 800 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:
25.06.2014 Bulletin 2014/26

(43) Date of publication:
30.04.2014 Bulletin 2014/18

(21) Application number: 12847629.8

(22) Date of filing: 26.10.2012
(51) International Patent Classification (IPC): 
B23B 1/00(2006.01)
G05B 19/4093(2006.01)
 B23Q 15/013(2006.01)
(86) International application number:
PCT/JP2012/077715
(87) International publication number:
WO 2013/069476 (16.05.2013 Gazette 2013/20)
(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

(30) Priority: 10.11.2011 JP 2011246433

(71) Applicant: Citizen Machinery Miyano Co., Ltd.
Kitasaku-gun, Nagano 389-0206 (JP)

(72) Inventors:
  • HARIKI, Ryo
    Osaka 537-0012 (JP)
  • KOBAYASHI, Kouichi
    Osaka 537-0012 (JP)
  • IMASAKI, Nobuyoshi
    Hyogo 661-0951 (JP)

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

   


(54) MACHINE TOOL


(57) The purpose of the invention is to provide a machine tool with which high quality machining of a workpiece obtained from mainly difficult-to-machine material can be stabilized and which limits the occurrence of fire while also being practical, not limiting workpiece machining shape, and being capable of performing low frequency vibration cutting that can finely fragment swarf even when vibrating the cutting tool and/or workpiece at low frequency on multiple axes. To achieve the purpose, the machine tool is provided with a cutting tool holder (5) that holds the cutting tool (4) for machining the workpiece and a rotation mechanism (3) that holds the workpiece (2). The cutting tool holder (5) or the rotation mechanism (3) is provided to be freely movable so that the cutting tool (4) is moved relative to the workpiece (2) in multiple axial directions. A control device (8) is provided for controlling the movement of the cutting tool holder (5) or the rotation mechanism (3) so that the workpiece (2) and the cutting tool (4) are synchronously vibrated relative to each other at low frequency in multiple axial directions.