Patent ID: 7048481
Filing Date: 2006-05-23
Classification: B23Q,Y10T

Abstract:
1. A spindle device of a machine tool comprising: a spindle; a cutting tool mounted on said spindle; a first cutting fluid passage and a second cutting fluid passage, each said cutting fluid passage having a single-shape passage cross section, said first cutting fluid passage comprising an inner pipe, said inner pipe being positioned at a rotating center of the spindle; said second cutting fluid passage ranging from the first cutting fluid passage to the tip of the cutting tool, and a straightening unit comprising a columnar member having a plurality of small-diameter passages, said passages arranged with one small-diameter passage in the center and the other small-diameter passages disposed in a circle concentric with the center small-diameter passage, said straightening unit being positioned in either said first cutting fluid passage or said second cutting fluid passage, or both, wherein atomized cutting fluid supplied to said first cutting fluid passage is ejected from the cutting tool by way of the first and second cutting fluid passages and the straightening unit.