| 摘要 |
A contour copying lathe has headstocks and tailstocks for rotating a model and at least one workpiece about parallel horizontal axes. A pair of angularly interconnected parallel arms are pivotal about a horizontal axis orthogonal to and spaced from the workpiece and model axes and are arranged vertically spaced from the tool and workpiece, respectively. The arm above the workpiece is provided at its free end with a tool rotated about an axis parallel to the pivot axis and orthogonal to the workpiece axis. The tool arm is provided with a feeler roller rotatable about the same axis as the tool. The arms are angularly interconnected so that the tool cuts into the workpiece the same contours as those felt by the tool arm. The tool is rotated at high speed so that its peripheral speed is many times the peripheral speed of the workpiece or the feed speed between it and the workpiece. It is possible to provide two such sets of arms, one for roughing in a workpiece and the other for finishing it, the latter following the former along the workpiece. |
