| 摘要 |
<p>A toolholder (1) is provided for receiving, pressurizing, and conducting an external stream (3) of coolant to a rotating cutting tool without mechanical containment between the toolholder (1) and the coolant stream (3). The toolholder (1) includes a shank (9) attachably connectable to a rotatable drive shaft, an adapter (11), such as a collet chuck (31), for connecting a rotatable cutting tool to the shank (9), and a coolant inducer (13) mounted between the shank (9) and the adapter (11). The coolant inducer (13) is formed from an impeller assembly (15) having a plurality of uniformly spaced, coolant receiving openings (54) around its periphery for receiving an uncontained coolant stream. A passageway (16) is provided along the axis of rotation of the adapter (11) for receiving and conducting the coolant pressurized by the impeller assembly (15) to a cutting tool secured in the adapter (11). The impeller-type coolant inducer eliminates the need for fluid seals or other friction-generating mechanical interfaces between the rotating toolholder and the source of pressurized coolant.</p> |
