| 摘要 |
In order to provide a machining apparatus which can save fluids such as water, compressed air and clean air, it comprises at least a spindle unit including a rotary spindle having a machining element attached thereto for effecting a required machining work on a workpiece and a spindle housing rotatably bearing the rotary spindle, and means for supplying the spindle unit with fluid for use in machining the workpiece. The means for supplying the spindle unit with fluid has a flow control provided in the fluid flowing passage for controlling the flow rate of the fluid in response to the rotating and stopping of the rotary spindle, thereby saving such fluid. Also, a controlled small quantity of such fluid is allowed to flow in the spindle housing after the machining is stopped, thereby retaining the thermal condition without being changed until the machining is resumed. Thus, no thermal calibration is required when the machining apparatus resumes work.
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