| 摘要 |
PROBLEM TO BE SOLVED: To surely supply oil mist to a tool tip through a spindle hole in a spindle-through machine tool. SOLUTION: In this spindle structure of a machine tool, shaft members 2, 4, 23 having shaft holes 2a, 4a, 23a are disposed along the axial direction, and the spindle hole for injecting oil mist is formed by communicating the shaft holes with each other. A baffle material 15 for an oil mist jet is disposed along the axial direction. A steady oil mist jet is varied without checking the migration of oil mist by the baffle material for the oil mist jet disposed in the shaft hole, whereby adhesion of the oil mist to the inner surface of the shaft hole due to centrifugal force is reduced. The oil mist is hard to adhere to the shaft hole, so that the oil mist is smoothly and efficiently supplied to the tool tip to achieve favorable semi-dry machining. An effect that the oil mist is efficiently supplied to reduce the quantity of oil used is also provided. COPYRIGHT: (C)2007,JPO&INPIT
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