US 8,668,412 B2 · Machining method and machine tool

Abstract

A minimum five-axis machine tool (11) has first to third linear feed axes orthogonal to each other as well as first and second rotational feed axes orthogonal to each other, wherein a rotational axis line of the first rotational feed axis C is parallel to the first linear feed axis Z. While a tool T and a work W are moved relatively through the second and third linear feed axes X, Y to perform machining of the work W by means of the tool T, the machine tool controls the first rotational feed axis C such that a rotational axis line of the second rotational feed axis A is perpendicular to the direction of relative movement of the perpendicular to the direction of relative movement of the tool T to the work W, and controls a power supplied to a motor for the second rotational feed axis A when a torque around the second rotational feed axis A exceeds a specified threshold.

Claims3

Dependent claims

A machining method executed with a five-axis machine tool having orthogonal first, second and third linear feed axes and orthogonal first and second rotary feed axes, a rotational axis line of the first rotary feed axis being parallel to the first linear feed axis, comprising the steps of:

controlling the first rotary feed axis so as to maintain a rotational axis line of the second rotary feed axis perpendicular to the feed direction of a tool relative to a workpiece while the tool and the workpiece are relatively moved along the second and the third linear feed axes and the workpiece is machined with the tool;
and
de-energizing a second rotary feed axis motor when the degree of torque about the second rotary feed axis or the electric current to the motor exceeds a predetermined threshold value.

Dependencies are inferred from the claim text.

Machining method and machine tool

Life of this patent

Machining method and machine tool

Life of this patent

Abstract

Claims3