Turning machine with pivoted armature
First Claim
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1. A machine tool for machining a rotating workpiece to a predetermined profile by reciprocation movements of the tool during a revolution of the workpiece, said machine tool comprising:
- a frame,means on the frame for rotating the workpiece at a predetermined velocity,a toolholder on the frame for holding the tool for reciprocating movements to bring the tool into engagement with the rotating workpiece to machine the surface thereof to the profile,bearing means mounting the toolholder relative to the frame for pivoting movement with low friction,a linear motor mounted on the frame for pivoting the toolholder on the bearing means to move the tool into cutting engagement with the rotating workpiece,an armature of the linear motor mounted on the toolholder,the armature being positioned on the toolholder and spaced from the tool on the toolholder to provide a mechanical advantage of about two or greater to increase the force of application of the tool to the workpiece while maintaining a low moment of inertia for the combined armature and toolholder.
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Abstract
The invention relates to a high speed turning machine for machining a rotating workpiece to have a predetermined profile surface by using a cutting tool mounted on a pivotal tool holder that is reciprocated rapidly toward and from the workpiece surface. An armature of a linear motor is mounted on the pivotal toolholder. The toolholder is mounted in frictionless bearings. The armature is positioned on the toolholder relative to the tool and its pivot axis to provide a substantial mechanical advantage.
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Citations
10 Claims
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1. A machine tool for machining a rotating workpiece to a predetermined profile by reciprocation movements of the tool during a revolution of the workpiece, said machine tool comprising:
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a frame, means on the frame for rotating the workpiece at a predetermined velocity, a toolholder on the frame for holding the tool for reciprocating movements to bring the tool into engagement with the rotating workpiece to machine the surface thereof to the profile, bearing means mounting the toolholder relative to the frame for pivoting movement with low friction, a linear motor mounted on the frame for pivoting the toolholder on the bearing means to move the tool into cutting engagement with the rotating workpiece, an armature of the linear motor mounted on the toolholder, the armature being positioned on the toolholder and spaced from the tool on the toolholder to provide a mechanical advantage of about two or greater to increase the force of application of the tool to the workpiece while maintaining a low moment of inertia for the combined armature and toolholder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification