| 摘要 |
PCT No. PCT/EP95/02490 Sec. 371 Date Jan. 23, 1997 Sec. 102(e) Date Jan. 23, 1997 PCT Filed Jun. 26, 1995 PCT Pub. No. WO96/03257 PCT Pub. Date Feb. 8, 1996A grinding machine includes a bed, structure for supporting a camshaft on the bed, a carriage displaceably mounted on the bed to permit movement relative to the camshaft in a radial direction of the camshaft, first and second grinding spindles respectively having a rough-grinding disc and a finish-grinding disc, a headstock having the first and second grinding spindles mounted therein and the first and second grinding spindles respectively having first and second spindle axes aligned to intersect each other at an angle. The second grinding spindle also has a third grinding which has a third diameter smaller than a first diameter of the rough-grinding disc, greater than a second diameter of the finish-grinding disc and equal to substantially twice a concavity radius and of a cam to be ground and a width narrower than a cam width. A method of grinding the cam includes first rough grinding the cam from an untreated configuration using the rough-grinding disc to an intermediate configuration using the rough-grinding disc, then rough grinding the cam to a modified intermediate configuration using the third grinding disc, wherein the modified intermediate configuration defines a concave side of the cam, by pivoting the headstock and advancing the third grinding disc against the cam in a longitudinal direction corresponding to the camshaft axis with the third grinding disc set at a depth substantially corresponding to a depth of the concavity, and finally finish grinding the cam by grinding the cam using the finish-grinding disc.
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