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Flatness defect detection using a single thickness profile gauge

A flatness and thickness measurement technology, used in contour control, length measuring devices, manufacturing tools, etc., to solve problems such as large flatness defects and preventing optical detection.

Pending Publication Date: 2021-05-11
NUCOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This tends to hide warpage, thereby preventing optical inspection until flatness defects become very large

Method used

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  • Flatness defect detection using a single thickness profile gauge
  • Flatness defect detection using a single thickness profile gauge
  • Flatness defect detection using a single thickness profile gauge

Examples

Experimental program
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Embodiment Construction

[0034] figure 1 and figure 2 The exemplary casting and rolling equipment shown includes a twin roll caster, generally indicated by reference numeral 11, which produces a thin cast steel strip 12 which enters a transition path through a guide platform 13, And arrive at the pinch roller frame 14. After leaving the pinch roll stand 14, the thin cast strip 12 enters and passes through a hot rolling mill 15 consisting of backup rolls 16 and upper and lower work rolls 16A and 16B where the thickness of the strip is reduced . Strip 12 leaves rolling mill 15 upon exit platform 17 where it may be forcibly cooled with water spray 18 and then passes through pinch roll stand 20 comprising a pair of pinch rolls 20A, And arrive at winder 19. Exit gauge 90 measures the thickness of the cast strip after exiting rolling mill 15 and provides a signal to controller 92 indicative of the measurement.

[0035] Please refer to figure 2 The twin roll caster 11 includes a main frame 21 support...

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PUM

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Abstract

A system for controlling a plant having a rolling mill for producing thin strip product is provided herein. The system includes a thickness gauge and a controller. The thickness gauge is positioned at the exit of the rolling mill to make thickness measurements of the thin strip product at a plurality of locations across a width of the thin strip product. The controller is coupled to the thickness gauge and configured to receive the thickness measurements, to process the thickness measurements to detect oscillations in the thickness of the thin strip product corresponding to a plurality of control locations, and to detect flatness defects in the thin strip product based on the thickness oscillations.

Description

[0001] This patent application claims priority to and benefit of U.S. Provisional Application 62 / 741,711, filed October 5, 2018, which is hereby incorporated by reference. Background technique [0002] In continuous casting of thin steel strip, molten metal is cast directly into thin strip by casting rolls. The shape of the thin cast strip is determined in particular by the surface of the casting faces of the casting rolls. [0003] In a twin roll caster, molten metal is introduced between a pair of counter-rotating, laterally arranged casting rolls, which are cooled internally so that the metal shell solidifies on the moving roll surfaces and The rolls are brought together at the nip between the rolls to produce a thin cast strip product. The term "nip" is used herein to refer to the general area where casting rolls are closest together. Molten metal may be poured from the ladle through a metal delivery system comprising a movable tundish and a core nozzle located above the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B38/02B21B37/00B21B37/16B21B37/28B21B38/00B21B38/06
CPCB21B38/02B21B37/32B21B38/04
Inventor J.E.凯弗R.G.诺宁
Owner NUCOR CORP