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Title:
WORKING TOOL PROTECTING DEVICE FOR MACHINE TOOL, AND HONING MACHINE
Document Type and Number:
WIPO Patent Application WO/2009/051150
Kind Code:
A1
Abstract:
In a machine tool of the type, in which a working tool attached to a rotating main spindle rotates to subject a work to a machining work such as a grinding or cutting operation, there is provided a working tool protecting device for preventing and protecting the damage or fold of the working tool due to an excessive torque load. The working tool is exemplified by a honing machine comprising a magnetic type coupling device (25) interposed between a rotating main spindle (2), to which a honing tool (1) or the working tool is attached, and the servo motor (16) of a main spindle rotating drive unit (3) for rotating the rotating main spindle (2), thereby to transmit the rotating force of the servo motor (16) to the rotating main spindle (2) by the magnetic action. The magnetic transmission torque for transmitting the rotating force of the magnetic type coupling device (25) is set lower than a predetermined torque load (e.g., the folding torque of the honing tool (1)) to be applied to the honing tool (1). As a result, it is possible to prevent and protect the damage or fold of the honing tool (1) due to the excessive torque load.

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Inventors:
TOMITA YASUO (JP)
IWAI TETSUO (JP)
Application Number:
PCT/JP2008/068693
Publication Date:
April 23, 2009
Filing Date:
October 08, 2008
Export Citation:
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Assignee:
NISSIN MFG CO LTD (JP)
TOMITA YASUO (JP)
IWAI TETSUO (JP)
International Classes:
B24B49/16; B23Q5/58; B24B33/06; B24B41/04
Foreign References:
JP2003311611A2003-11-05
JPH08141864A1996-06-04
JPS61192441A1986-08-27
JP2003170344A2003-06-17
JP2003236750A2003-08-26
JPH03111170A1991-05-10
Attorney, Agent or Firm:
SANO, Shogo et al. (8016-4, Otemae 1-chome, Chuo-k, Osaka-shi Osaka 08, JP)
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