Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (10): 1398-1402.DOI: 10.12068/j.issn.1005-3026.2016.10.007

• Materials & Metallurgy • Previous Articles     Next Articles

Temperature Control of Online Heating Strip on Hydraulic Tension Experimental Warm Rolling Mill

SUN Tao, LI Jian-ping, WANG Gui-qiao, WU Zhi-qiang   

  1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China.
  • Received:2015-07-07 Revised:2015-07-07 Online:2016-10-15 Published:2016-10-14
  • Contact: SUN Tao
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Abstract: The method of resistance heating was used to heat the workpiece online by applying low voltage and large current. The double loop heating devices and contact-type thermometers were designed to ensure the measurement accuracy and temperature uniformity of the thin plate. The temperature controller adopted the way of combining feedforward and feedback controllers and the setting value of the temperature controller was summed output from the two controllers, in which the feedforward controller was designed on the basis of the heat balance equation of the resistance heating sheet and the PID controller was used as the feedback controller. The results in practice showed that the technology could meet the requirements of heating rate and temperature-controlled precision, and the temperature uniformity was improved by continuous heating in the rolling process.

Key words: warm rolling, experimental mill, resistance heating, temperature control, feedforward, feedback

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