| 摘要 |
A milling apparatus and method are provided for generating eccentric camshaft lobes with a peripheral surface that is parallel to the horizontal axis of the camshaft for preferably the entire 360° peripheral surface of the lobe. In one form, the cutter is shifted during milling so that the cutting insert is cutting the peripheral surface on the lobe that is always parallel to the camshaft axis. The cutter head can be tilted to keep the cutting edge straight and parallel to the camshaft axis and, as the cutting head pivots the cutting edge, it also moves sideways with the width of the cutter covering the width of the lobe's peripheral surface. If an eccentric lobe is of a drastic shape where the cutting edge does not cover the entire width of the lobe, a fourth axis may be used in an interpolative manner to keep the cutting edge always bridging the lobe surface.
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