Method and machine for determining a shape contour on a measurement object
First Claim
1. A method for determining a shape contour on a measurement object, comprising the steps:
- providing a coordinate measuring machine having a rotary table, a measuring head with a measuring element and a frame on which the measuring head is arranged,wherein the frame has a first frame part moveable relative to the rotary table along a first movement axis, a second frame part moveable relative to the rotary table along a second movement axis, and a third frame part moveable relative to the rotary table along a third movement axis, and wherein the rotary table can be rotated about a further axis,arranging the measurement object on the rotary table and positioning the measuring element at a defined position along the first, second and third movement axes by moving at least one of the first, second and third frame parts,rotating the rotary table while the measuring head, using the measuring element, records current measured values which represent spatial positions of measuring points on the measurement object relative to the measuring head, anddetermining the shape contour on the basis of the current measured values,wherein the measuring element is mounted via at least one fluid bearing in order to permit a movement of the measuring element relative to the rotary table, andwherein the at least one fluid bearing is deactivated while the current measured values are recorded.
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Accused Products
Abstract
A coordinate measuring machine has a rotary table supporting a measurement object, a measuring head including a measuring element and a frame, on which the measuring head is arranged. The frame has first, second and third frame parts moveable relative to the workpiece holder along first, second and third movement axes, respectively. The measuring element is mounted via at least one fluid bearing, such as an air bearing, on one or more of the frame parts. The measuring head is positioned at a defined position along the first, second and third movement axes. Thereafter, the at least one fluid bearing is deactivated and the rotary table rotated around a further axis while the measuring head, using the measuring element, records current measured values. A shape contour of the object is determined on the basis of the measured values recorded while the at least one fluid bearing was selectively deactivated.
14 Citations
16 Claims
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1. A method for determining a shape contour on a measurement object, comprising the steps:
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providing a coordinate measuring machine having a rotary table, a measuring head with a measuring element and a frame on which the measuring head is arranged, wherein the frame has a first frame part moveable relative to the rotary table along a first movement axis, a second frame part moveable relative to the rotary table along a second movement axis, and a third frame part moveable relative to the rotary table along a third movement axis, and wherein the rotary table can be rotated about a further axis, arranging the measurement object on the rotary table and positioning the measuring element at a defined position along the first, second and third movement axes by moving at least one of the first, second and third frame parts, rotating the rotary table while the measuring head, using the measuring element, records current measured values which represent spatial positions of measuring points on the measurement object relative to the measuring head, and determining the shape contour on the basis of the current measured values, wherein the measuring element is mounted via at least one fluid bearing in order to permit a movement of the measuring element relative to the rotary table, and wherein the at least one fluid bearing is deactivated while the current measured values are recorded. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A coordinate measuring machine for determining dimensional characteristics including a shape contour on a measurement object, comprising:
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a workpiece holder having a rotary table, a measuring head having a measuring element, a frame on which the measuring head is arranged, and an evaluation and control unit, wherein the frame has a first frame part which can be moved relative to the workpiece holder along a first movement axis, and wherein the frame has a second frame part which can be moved relative to the workpiece holder along a second movement axis, wherein the rotary table can be rotated about a further axis, wherein the evaluation and control unit is configured to position the measuring head at a defined position along the first and second movement axes and to rotate the rotary table while the measuring head, using the measuring element, records current measured values which represent spatial positions of measuring points on the measurement object relative to the measuring head, wherein the evaluation and control unit is further configured to determine the shape contour on the basis of the current measured values, wherein the measuring element is mounted via at least one fluid bearing in order to permit a movement of the measuring element relative to the workpiece holder, and wherein the evaluation and control unit is further configured to deactivate the at least one fluid bearing during recording of the current measured values. - View Dependent Claims (15)
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16. A method for determining a shape contour on a measurement object, comprising the steps of:
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providing a coordinate measuring machine having a rotary table, a measuring head and a frame supporting the measuring head, the frame having a first frame part moveable relative to the rotary table along a first movement axis, a second frame part moveable relative to the rotary table along a second movement axis, and a number of air bearings enabling movement of said first and second frame parts relative to the rotary table, arranging the measurement object on the rotary table, positioning the measurement head relative to the rotary table along said first and second movement axes, rotating the rotary table about a further axis and simultaneously recording current measured values using the measurement head, said current measured values representing spatial positions of measuring points on the measurement object, and determining the shape contour on the basis of the current measured values, wherein at least one air bearing from the number of air bearings is deactivated while the current measured values are recorded.
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Specification