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AssigneeLAP GmbH Laser Applikationen
InventorKarsten Hofman
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The invention relates to an apparatus and process for measuring the diameter and out-of-roundness of elongate workpieces, particularly those of round products advanced in their longitudinal direction in rolling mill trains. A reliable discrimination of orbiform-curved contours is required in measuring such workpieces. In an aspect of the invention, an apparatus is suggested with three or more laser triangulation devices, which measure the distance from the workpiece surface wherein the lasers of the triangulation device are directed to a common point of intersection which corresponds to the workpiece center and the laser beams of which span a common plane which is perpendicular to the longitudinal direction of the workpiece, and which are at angular distances which are substantially equal.
An apparatus for measuring the diameter and out-of-roundness of elongate workpieces, particularly those of round products advanced in their longitudinal direction in rolling mill trains, including three or more laser triangulation devices, which are directed to a common point of intersection which corresponds to the workpiece center, and the laser beams of which span a common plane which is perpendicular to the longitudinal direction of the workpiece and which are arranged at angular spacings which are substantially equal two by two.
An apparatus for measuring the diameter and out-of-roundness of elongate workpieces, particularly those of round products advanced in their longitudinal direction in rolling mill trains, including three or more laser scanners, each of which has a light-sensitive sensor and a laser which is directed thereto for the illumination of a sensor area, and the laser beams of which form are a triangle or polygon around the workpiece for sensing the workpiece tangentially such that the workpiece partly hides the illuminated areas of the sensors.
An apparatus for measuring the diameter and out-of-roundness of elongate workpieces, particularly those of round products advanced in their longitudinal direction in rolling mill trains, including three or more laser scanners, which have a light-sensitive sensor and a laser each which is directed thereto for illuminating a sensor area, which are arranged at substantially equal angular distances from each other, and the laser beams of which illuminate the workpiece such that the workpiece casts a shadow completely within the illuminated area of the sensor.
A process for measuring the diameter and out-of-roundness of elongate workpieces, particularly those of round products advanced in their longitudinal direction in rolling mill trains, including a measuring device comprised of three or more laser triangulation devices, which are directed to a common point of intersection in the workpiece center at a predetermined distance, and have angular spacings which are substantially equal two by two, and each of which measures the distance of the workpiece surface from the workpiece center.
A process for measuring the diameter and out-of-roundness of elongate workpieces, particularly those of round products advanced in their longitudinal direction in rolling mill trains, with a measuring device comprised of three or more laser triangulation devices, comprising the process steps below:
Dependencies are inferred from the claim text.