A high-precision
machine tool spindle
assembly belongs to the field of
machine tool technology. The
assembly includes a motion base, a spindle, and a monitoring unit. The motion base has a monitoring cavity, a first optical channel, a second optical channel, and a rotating cavity connected sequentially. The main body section of the spindle is rotatably fitted into the rotating cavity, and the outer wall of the main body section has a
recessed light groove, the bottom of which corresponds to the second optical channel. The monitoring unit includes a
light source, a first reflector, a second reflector, a
projection screen, and an image monitor. The first reflector is located at the bottom of the light groove and reflects the light emitted by the
light source into the second optical channel. The second reflector is located at the connection between the first and second optical channels and reflects the light into the first optical channel. The
projection screen and image monitor are located in the monitoring cavity. The
projection screen projects the light emitted from the first optical channel, and the image monitor monitors the light projected onto the projection screen. This
assembly can monitor whether the spindle is laterally deflected, which helps improve the reliability of the spindle.