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The Research Application of Hydraulic Looper in Meishan Hot Strip Mill

Author: LiuXiaoGuang
Tutor: ZhouZuo
School: Northeastern University
Course: Control Engineering
Keywords: Hot Rolling Mill Hydraulic Looper Tension Control Sets the amount of control
CLC: TG333
Type: Master's thesis
Year: 2007
Downloads: 49
Quote: 0
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Abstract


Looper is a very important system in the modern hot strip mill . Its performance advantages and disadvantages will be directly reflected in the product quality of the finished strip . The looper evolved pneumatic, electric , hydraulic stage . Looper control from the open-loop control to closed-loop control to all-digital multi-variable control progress , the aim is to continuously improve the quality of the strip . The plum steel hot rolling production line after the transformation in 2002 , with a state-of-the-art hydraulic looper equipment , control using advanced all-digital multi- variable control technology . Better mastery of advanced technology and improve product quality, live sets from the theoretical analysis of the deduced sets the amount of control and tension control mathematical model , summarized advanced experience , which is the purpose of this research . The hot rolling process is built on top of this theory of \In actual production , because of the impact of the blank size , temperature , and often result in seconds, traffic is not equal to the disruption of normal continuous rolling , rolling unit re - achieve equal second flow therefore need to take certain measures . On one hand, the the looper constant tension control to ensure tight strip , improve stability ; On the other hand , the the looper volume control on the main speed correction , the purpose of the second flow equal . Exported through the geometric relationship looper mathematical model and torque mathematical models strip amount ΔL rack Looper and Looper looper arm rotation relative to the actual height of the high degree of movement from the rolling line angle θ square proportional. Therefore , changes in the angle θ will reflect the change in the amount of the looper . The amount of control looper sets essentially control the looper support the rotation angle . The looper torque control , in addition to providing constant tension , but also provide the component of gravity, and the total torque also constitute a function of the angle of rotation of the looper arm . Coupling relationship exists between the looper height and tension control specific application , the need for comprehensive control .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Rolling > Rolling mill machinery equipment
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