Apparatus for process for measuring the thickness and out-of-roundness of elongate workpieces
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United States of America Patent
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Apr 15, 2003
Grant Date -
Nov 15, 2001
app pub date -
May 1, 2001
filing date -
May 11, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
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.
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