Thickness measuring method for cold rolling strips

A cold-rolled plate and thickness measurement technology, which is applied in metal rolling, length measuring devices, metal rolling, etc., can solve the problems of difficult to ensure the thickness accuracy of cold-rolled strips, difficult storage of radioactive sources, slow response speed, etc., to achieve Solve the risk of social harm, the method is reasonable, and the effect of using reliable

Inactive Publication Date: 2013-04-03
TIANJIN YIBO STEEL MAKING
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Problems solved by technology

[0003] At present, the response speed of the isotope gamma or beta ray thickness gauge used in cold-rolled strips is slow, and it is difficult to guarantee the thickness accuracy of cold-rolled strips under the condition of high-speed rolling; gamma or beta rays are potentially harmful to the human body. If the radioactive source is lost, it will cause harm to the society, and it is difficult to keep the radioactive source

Method used

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  • Thickness measuring method for cold rolling strips
  • Thickness measuring method for cold rolling strips

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Embodiment

[0014] A method for measuring the thickness of a cold-rolled strip. The entrance thickness setting 21 and the exit target setting 22 of the steel strip are input through the man-machine interface of the industrial control computer 1. During operation, when the thickness fluctuates before rolling, the entrance thickness gauge 31 transmits the measured value to the PLC system 6, and after calculation and comparison by the entrance calculation and comparison 41, the PLC system 6 controls the hydraulic device 8 through the servo valve 7 to respond to realize the feed-forward control 51, changing the size of the rolling force, adjusting After the reduction is qualified, rolling is carried out; the exit thickness gauge 32 transmits the data deviation value between the rolled thickness and the exit target setting 22 to the PLC system 6 at any time, and when the exit thickness is detected to change, it is calculated by the exit After comparison 42 is calculated and compared, the PLC sy...

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Abstract

The invention discloses a thickness measuring method for cold rolling strips, which comprises an industrial control computer, inlet thickness setting, outlet goal setting, an inlet thickness meter, an outer thickness meter, inlet calculating and comparing, outlet calculating and comparing, feedforward control, feed backward control, a PLC (Programmable Logic Controller) system, a servo valve and a hydraulic device. The X-ray thickness measuring method without a radioactive source is adopted to input the inlet thickness setting and outlet thickness setting of strip steel through the human-computer interface of the industrial control computer, ensuring that the thickness precision of the cold rolling strips conforms to the quality requirement.

Description

Technical field [0001] The invention relates to a thickness measuring method, in particular to a method for measuring the thickness of a cold-rolled strip, which is suitable for a cold-rolled strip operation line. Background technique [0002] The thickness accuracy of cold-rolled strips is one of the important indicators for evaluating the quality of cold-rolled strips. The factors affecting the thickness accuracy of cold-rolled strips include the design and manufacture level of rolling mills, the level of automation control, the manufacturing and processing of process parts, and the technical level of operators. The thickness method is also an important factor affecting the thickness accuracy. [0003] At present, the response speed of the isotope gamma or beta ray thickness gauge used in cold-rolled strips is slow, and it is difficult to guarantee the thickness accuracy of cold-rolled strips under the condition of high-speed rolling; gamma or beta rays are potentially har...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B38/04B21B37/18
Inventor 宋书成齐立峰
Owner TIANJIN YIBO STEEL MAKING
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