| 摘要 |
<p>A method and apparatus for machining a workpiece with an insert (58) having a surface (64) terminating with a cutting edge includes a tool holder (41, 76) adapted to mount the insert, which is formed with a discharge orifice (84) lying atop the exposed surface of the insert for ejecting high velocity coolant across the insert and beneath the chips formed from the workpiece. The discharge orifice of the tool holder is spaced within the range of about 0.04 to 0.44 inches from the cutting edge of the insert clamped therein. The coolant is ejected from the discharge orifice at a velocity within the range of at least above 250 feet per second, and the tool holder is advanced in the cut at a feed rate within the range of about 0.004 to 0.025 inches per revolution of the holder or workpiece</p> |
