Rotary cutting tool
First Claim
Patent Images
1. A rotary cutting tool for mounting on a spindle of a machine tool, comprising:
- a base for attaching the tool to the spindle of the machine tool, the base having an axis of rotation;
a support for a tool bit, the support being connected to the base;
means within the tool permitting displacement of the support perpendicular to the axis of the base;
means within the tool for determining the magnitude of the displacement of the support;
means within the tool for receiving position demand data, the data relating to a demanded magnitude of the displacement of the support;
a motor within the tool for displacing the support perpendicular to the axis; and
a tool control within the tool for actuating the motor in accordance with the said data.
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Accused Products
Abstract
A cutting tool includes a motor and control inside the cutting tool for adjusting the cutting radius of the cutting tool. The cutting tool is adaptable for use with machine tools which do not include integral systems for moving parts of the cutting tool adjust the cutting radius.
51 Citations
12 Claims
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1. A rotary cutting tool for mounting on a spindle of a machine tool, comprising:
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a base for attaching the tool to the spindle of the machine tool, the base having an axis of rotation; a support for a tool bit, the support being connected to the base; means within the tool permitting displacement of the support perpendicular to the axis of the base; means within the tool for determining the magnitude of the displacement of the support; means within the tool for receiving position demand data, the data relating to a demanded magnitude of the displacement of the support; a motor within the tool for displacing the support perpendicular to the axis; and a tool control within the tool for actuating the motor in accordance with the said data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of machining a bore in a workpiece, using a rotary cutting tool mounted to the spindle of a machine tool, the cutting tool having an adjustable cutting radius and means for measuring the cutting radius, the method comprising the steps of:
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setting the tool cutting radius to a first value; machine a bore in a workpiece; measuring, with the tool, the actual radius of the first bore, by keeping the machine tool spindle stationary, adjusting the tool radius to bring the tool into a predetermined spatial relationship with the surface of the bore and measuring the cutting radius of the tool upon attainment of the said relationship; determining an offset value of radius equal to the difference between the first value and the actual value, the offset being positive if the first value is greater than the actual value, and negative if the first value is less than the actual value; if the offset value is positive, setting the tool cutting radius to an adjusted value, the adjusting value being the sum of the actual value and the offset value; and machining a further bore with the tool cutting radius at the adjusted value. - View Dependent Claims (11)
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12. A method of machining a bore of predetermined radius in a workpiece, using a rotary cutting tool mounted to the spindle of a machine tool, the cutting tool having an adjustable cutting radius and means for measuring the cutting radius, the method comprising the steps of:
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setting the tool cutting radius to a first value, the first value of cutting tool radius being smaller than the predetermined radius and being known relative to the predetermined radius; machining a first bore in a workpiece with the tool cutting radius at the first value; measuring, with the tool, the actual radius of the first bore by keeping the machine tool spindle stationary, adjusting the tool radius to bring the tool into a predetermined spatial relationship with the surface of the bore and measuring the cutting radius of the tool upon attainment of the said relationship; determining an offset value of radius equal to the difference between the first value and the actual value, the offset value being positive if the first value is greater than the actual value, and negative if the first value is smaller than the actual value; if the offset value is positive, setting the tool cutting radius to a second value the second value being the sum of; the first value; the difference between the first value and the predetermined radius; and the offset value; and machining a second bore with the tool cutting radius at said second value.
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Specification