| 摘要 |
An improved technique for cutting the end of elongated stock at a selected angle to the longitudinal axis of the stock. The machine includes a chuck for securing and supporting the trailing end of the stock. The chuck is mounted for movement along a rail to advance the leading end of the stock along its longitudinal axis to a cutting station. The chuck includes an arrangement for precision advancement along the rail and for measuring accurately the distance through which the chuck and its supported stock are advanced. The chuck also is rotatable to enable the angular position of the stock to be adjusted about its longitudinal axis. The degree of angular rotation of the chuck is controlled and measured precisely by a protractor which is rotatable with respect to the chuck to enable the protractor to be set to a fixed reference index. The protractor thereafter is secured to the chuck for rotation in unison there-with and provides a precise indication of the angle through which the chuck and the stock has been rotated. A cutting unit having a cutter blade is located at the cutting station and is mounted for movement toward and away from the stock along a cutter descent axis which is perpendicular to the longitudinal axis of the stock. A dual vise arrangement is provided for holding the stock on both sides of the region where the cut is to be made. The cutting blade, which lies in a vertical plane, is adjustably rotatable about the cutter descent axis to vary the angle which the blade makes with the stock. The cutting blade is part of a cutting unit which is mounted to a supporting post for movement toward and away from the cutting station. The supporting post is located in a position which enables the cutter blade to be rotated through its full range of angular positions without directing swarf toward the post or any other portion of the machine. Additionally, the cutting unit is counterbalanced so that the operator need only apply minimal force to urge the cutter downwardly toward and through the elongated stock. The machine also includes an improved arrangement for marking the protractor and the scale which indicates the position of the cutting unit above the cutter descent axis. These improvement scales are adapted to enable a relatively simple programmed series of steps to be provided to the operator for cutting relatively complex parts. Gauges and limit stops also are associated with the counterbalanced cutter unit to enable the operator to control accurately and repetitively the depth of cut.
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