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Method for on-line measuring sickle curve of plate blank

A sickle bend and slab technology, applied in the field of measurement, can solve problems such as loss, poor accuracy, and misjudgment, and achieve the effect of avoiding major quality accidents

Inactive Publication Date: 2009-10-07
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1. During online production, the accuracy of manual visual inspection is very poor, sometimes causing misjudgment and affecting production;
[0009] 2. After the slab is cooled, it generally takes two days for the cooling time. A large number of slabs have been produced. If you don’t pay attention, a large number of slabs with camber bends exceeding the standard will be produced, causing heavy losses. In this case, each steel Factory happens from time to time

Method used

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  • Method for on-line measuring sickle curve of plate blank
  • Method for on-line measuring sickle curve of plate blank
  • Method for on-line measuring sickle curve of plate blank

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Example 1, Calculation of the whole slab camber

[0029] The speed of the slab conveying roller table is 20m / min. After the head of the slab reaches the laser instrument in the middle, the position of the slab is measured. The principle is to use the reflected light from the laser to the slab, and the distance from the centerline of the slab to the laser head is known, so that the distance L from the edge of the slab to the centerline of the slab can be calculated. After the slab reaches the last laser, continue to run forward for 1.5m (the distance between two adjacent lasers), start to draw the outline of the slab, and calculate the camber value. Connect the two endpoints of the slab, which is the straight line L1, draw a vertical line c1 to L1 through the edge curve of the slab, and the maximum value max(c1) from the edge of the slab is the first camber of the slab value, see Figure 3a .

[0030] After the slab passes the last laser for 1.5m, start to draw the ed...

Embodiment 2

[0034] Example 2, take the maximum value of the camber curve within the specified distance on the slab

[0035] The calculation method of the camber curve of the cut-to-length distance is the same as that of the slab section. The main steps are: after the head of the slab passes the last laser for 1 meter, start to calculate the camber value per meter, make a vertical line connecting the two endpoints to the straight line, and obtain the maximum value c2 from the edge of the slab; after 0.25s, Redraw the slab edge curve,

[0036] But it is different from the length measured in Example 1. The new slab curve will discard the slab section before 0.25s and supplement the new slab section, that is, the slab is always in 1 meter unit. The newly calculated camber value is then compared to the first time, and the larger value is retained. This cycle continues until the tail of the slab leaves the last laser, and the value max(c2) of the maximum camber per meter of the slab is obtai...

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Abstract

The invention discloses an online method for measuring the camber of a slab, which utilizes the characteristics of the laser to measure the distance accurately, and adds two laser instruments on the basis of the original slab width measuring instrument, and the laser in the original slab width measuring instrument The instrument is combined together to form a three-point distance measurement on one side of the slab to measure the curvature of the slab; the laser instrument scans the edge of the slab at a certain frequency, and the measured distance between the slab and the laser instrument is input into the computer. The edge contour curve of the slab is recorded and drawn by the computer, and then the two end points of the slab are connected to form a straight line L, and the distance from the edge of the slab to each point of the straight line L is calculated, and the maximum value is taken as the camber value of the slab . The invention utilizes the function of laser ranging to accurately measure the camber degree of the slab under high temperature during online casting, grasp the quality of the online production slab in time, and avoid the occurrence of major quality accidents.

Description

technical field [0001] The invention relates to measurement technology, in particular to a method for online measurement of slab camber. Background technique [0002] The measurement of slab shape dimensions is the necessary equipment for continuous casting and hot rolling production in modern steel mills at home and abroad. Each steel mill designs and installs slab shape measurement systems with different functional requirements according to the characteristics and needs of its own equipment. It is used to control the external dimensions of the continuous casting slab and provide reliable slab size data for the rolling of the next process slab, which can effectively improve the quality of hot rolled coils. [0003] At present, the design and production of slab dimension measuring instruments at home and abroad mainly include ASC of the United States, Limab of Sweden, and LAP of Germany, all of which use the principle of laser ranging to measure the width, thickness, length ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00G01B11/02G01B21/00G01B21/02
Inventor 陈勇苏锦朱文杰
Owner BAOSHAN IRON & STEEL CO LTD