Machines for measuring the dimensions of workparts
AssigneeSociete d'Applications Generales d'Electricite et de Mecanique Sagem
InventorsAlain Dore, Henri Judet
Life of this patent
Estimating the term…
Abstract
A machine for measuring the dimensions of a workpiece, comprising a base te for receiving the workpiece and a mechanical structure carrying a feeler for movement along three orthogonal axes at right angles by means providing for direct measuring of the amounts of movement of the feeler along the axes. Optical deviation measurement means determine the errors due to deformation of the components, lost motion as well as pitch, yaw and/or roll of the movable components. The corrections to be applied to the data delivered by the measuring means are computed and may be made automatically for the display to be free of errors.
Claims8
Machine for measuring the dimensions of a workpart, comprising a base plate constructed to receive the workpart, a mechanical structure bearing a feeler movable along orthogonal axes, devices carried by said structure for direct measurement of the movement of the feeler along said axes, optical deflection measurement means operatively associated with said structure for determining the errors of measurement or of movement due to play and deformation of movable component members of said mechanical structure along at least one of said axes and for providing electric signals representative of said errors;
- and computing means connected to receive said electrical signals and for computing the corrections to be made to the results provided by said devices for direct measurement.
A machine for measuring the dimensions of a workpiece, comprising:
- a base plate for receiving said workpiece
- a mechanical structure comprising:
- a first member movable along a first direction Ox with respect to the base plate,
- a second member displaceable with respect to the first member along an axis O.sub.1 z perpendicular to the first direction Ox, and
- a third member movable with respect to the second member along an axis O.sub.2 y perpendicular to the directions Ox and O.sub.1 z, and
- a feeler carried by said third member, means for determining, by optical deviation measurement, the measuring errors due to lost motion and deformation of the components of the mechanical structure along at least one of said axes, comprising:
- a source borne by the second member, emitting a cylindrical light beam parallel to said axis O.sub.2 y,
- optical detector means borne by the third member, located to receive said light beam, and
- electrical means associated with said optical detector means for determining the errors along said directions Ox and O.sub.1 z.
A machine for machining a workpiece, comprising a base plate for receiving the workpiece, a mechanical structure carrying a cutting tool and mounted to be movable along orthogonal axes, means on said mechanical structure for controlling the movement of said tool along said axes, optical deflection measurement means on said mechanical structure for determining the errors of movement due to deformation of the components of the mechanical structure along at least one of said axes and computing means coupled to said deflection measurement means for computing corrections to be made in locating said tool.
Dependencies are inferred from the claim text.