Hot continuous rolling intermediate billet thickness calculating method

Abstract

The invention provides a hot continuous rolling intermediate billet thickness calculating method. The method comprises the steps of measuring the width of a rolled piece during hot continuous rolling, measuring the thickness of the finish-rolled piece, and detecting the thermal signal of the rolled piece in real time; calculating the average velocity, average thickness and average width of the head of the finish-rolled piece; calculating the flow rate per second of the head of the finish-rolled piece according to the average velocity, average thickness and average width of the head of the finish-rolled piece; calculating the average velocity of the tail of the rolled piece and the average width of the tail of the rough-rolled piece; calculating the thickness of a rolled piece intermediate billet. According to the method, the average thickness of the rolled piece calculated according to the flow rate per second invariance principle can be taken as the actual thickness of the intermediate billet; accurate measurement of the thickness of the intermediate billet can be achieved through measured data obtained with a field instrument. By the adoption of the method, the thickness of the intermediate billet can be calculated accurately, and the problem that the thickness of the rough-rolled piece can not be measured when no thickness gauge is available is solved; productive investment cost is reduced, and thickness measurement accuracy is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of rolling process control, and in particular relates to a method for calculating the thickness of a hot continuous rolling intermediate slab. Background technique [0002] The thickness control accuracy of the hot continuous rolling intermediate billet is very important, and it is an indispensable link in the process control. At present, in the domestic hot rolling production line, most of the thickness measuring instruments are imported non-contact ray measuring instruments, which are very expensive; due to the harsh environment such as high temperature and high dust on the exit side, the measurement accuracy is often reduced due to unfavorable maintenance. Therefore, most hot continuous rolling manufacturers install thickness gauges at the exit of finishing rolling, and do not install thickness gauges at the exit of rough rolling, but use manual measurement instead of testing instruments to reduce investm...

AI Technical Summary

Problems solved by technology

At present, in the domestic hot rolling production line, most of the thickness measuring instruments are imported non-contact ray measuring instruments, which are very expensive; due to the harsh environment such as high temperature and high dust on the exit side, the measurement accuracy is often reduced due to unfavorable maintenance. Therefore, most hot continuous rolling manufacturers install thickness gauges at the exit of finishing rolling, and do not install thickness gauges at the exit of rough rolling, but use manual card measurement instead of testing instruments to reduce investment, and the measurement accuracy is low, resulting in poor control accuracy.

[0003] A measuring device is proposed in the patent "A Method for Measuring the Thickness of an Intermediate Blank". Due to the possible existence of mechanical gaps, there are measurement errors.

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