Patent ID: 7588397
Filing Date: 2009-09-15
Classification: B23B,B23Q,Y10T

Abstract:
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.