| US 7,588,397 B2 | ||
| Method and apparatus for machining crankshafts or camshafts | ||
| Bramwell W. Bone, Midland, Mich. (US); Paul Haddad, Midland, Mich. (US); and Ned Arnold, Midland, Mich. (US) | ||
| Assigned to Ingersoll CM Systems LLC, Midland, Mich. (US) | ||
| Filed on Aug. 31, 2005, as Appl. No. 11/217,107. | ||
| Prior Publication US 2007/0048098 A1, Mar. 01, 2007 | ||
| Int. Cl. B23B 35/00 (2006.01) | ||
| U.S. Cl. 408—1R [408/236; 29/888.08; 29/888.1] | 7 Claims |
| 1. A method of machining an elongated workpiece having a longitudinal axis and radially extending projections, the method
comprising:
rotating the workpiece about its longitudinal axis to position the projections relative to a cutting tool;
mounting a tool carrier carrying the cutting tool on a lower bearing for being pivoted in an arcuate path to position a plunging
axis for the tool at various angles including oblique angles to the axis of the workpiece;
driving the tool carrier at an upper end thereof remote from the lower bearing for shifting the tool carrier in the arcuate
path about the lower bearing; and
plunging the tool along a straight line path of travel and at a predetermined angle to the workpiece longitudinal axis to
engage the projections of the workpiece at the predetermined angle and machining the workpiece,
wherein the pivoting of the tool carrier about an arcuate path comprises arranging the bearing to be coincident with the rotational,
longitudinal axis of the workpiece.
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