| 摘要 |
A drill apparatus including a stationary support frame, a drill carriage mounted on the stationary support frame for movement relative thereto along a generally horizontal path, a drill head mounted on the carriage and having a drill rotatable about an axis paralleling the horizontal path, a work engaging head mounted on the drill head for movement relative thereto along a feed path paralleling the horizontal path of movement of the carriage, and feed mechanism connected to the drill head and to the work engaging head for selectively moving the latter toward and away from the drill head. The drill head and work engaging head are adjustable as a unit in a vertical direction relative to the carriage to vertically position the drill and work engaging head. The relative positions of the work engaging head and drill head are sensed to control the direction and speed of relative movement of the work engaging head relative to the drill head.
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