Looper and tension control, shown in Fig. 2, is important in hot strip mills because they affect both the dimensional quality and the mass flow of a high strip tension between stands induces width shrinkage, thickness reduction and moreover can produce an edge wave on a strip.Get Price
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Looper and tension control, shown in Fig. 2, is important in hot strip mills because they affect both the dimensional quality and the mass flow of a high strip tension between stands induces width shrinkage, thickness reduction and moreover can produce an edge wave on a strip.
For optimized rolling between stands, loopers maintain a loop to ensure that there is no tension in the rolled material. We maufacture side loopers. Looper and tension control is important in hot strip mills because they affect the strip quality as well as strip threading. Loopers are arranged in the finishing mill area for tensionfree rolling.
In a hot strip rolling mill a velocity damping compensator circuit is added to the current regulating loop of the looper motor drive generating a torque on the looper arm mechanism between roll stands, thereby to prevent disturbances when applying the looper arm and looper roller against the strip being rolled.
Strip Mill stand Looper Fig. 1. Tandem rolling mill with ve mill stands. tension as this control approach facilitates a systematic consideration of constraints and the multiple interactions between loopers and mill stands. Choi et al. 2007a analyzed MPC formulations featuring robustness against dis
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Keywords model predictive control, LQMPC, hot rolling mill, dynamic rolling simulator, looper height control, looper and tension control. Abstract The looper and tension control is important in a hot strip mill because it affects the strip quality as well as strip threading. There are tension disturbances, which might cause constraint
Rolling of Steel in a Modern Long Product Rolling Mill Long product is a common name for i reinforcement steel bars, ii shaped steel bar products such as rounds, flats, squares, and hexagon etc., iii sectional products such as angles equal and unequal, channels, beams, tees, and special profiles etc., and iv wire rods.
A looper control system has a looper that is interposed between two rolling stands of a tandem rolling mill and is actuated by a hydraulic actuator and a control calculating section for calculating a speed change rate command value of a primary rolling machine and a pressure command value of a hydraulic looper actuator so that an interstand tension and a looper height can be both controlled
We supply specialized high performance and reliable optical sensors and dimension measuring equipments for continuous caster and rolling mill automation. The products are designed to withstand the extreme conditions of the steel industry. Hot Metal Detectors The scanning system, in association with stateoftheart IR photocell technology, is the optimal solution for accurate, fast and
This film takes you through the processes within a hot rolling mill. You39ll get to see the different stages all the way from heating to cooling. Filmed at SSAB in Borlnge,
A rolling mill according to claim 8 wherein said means connecting said looper means to said drive includes an integral control circuit, a proportional control circuit and means for retaining at least said integral control circuit in fixed position upon passage of the tail end of said material beyond said looper means.
Keywords Nonlinear systems, Impedance control, Distributed parameter system, Hamilton39s principle, Steel industry, Tandem rolling mill, Looper control, Strip tension control. 1. INTRODUCTION In the metals industry, tandem hot strip rolling mills are used for rolling out thick semifinished products, e. g., slabs, to thinner flat products.
Key words Loopers, Covariance control, Variance control, Hot strip mill, Hot rolling 1 Introduction A nishing mill produces thin sheet from hot steel bars by successively reducing the gauge using 5 to 7 sets of rolls, each called a mill stand. The nishing mill is part of a hot strip mill, of which a typical layout is given in Figure 1.
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Looper and tension control is important in hot strip mills because they affect the strip quality as well as strip threading. Moreover, the most difficult challenge in controller design and control
Loop Regulation LAP loop measurement systems are designed for loop control in almost every application in the steel industry. They are used for Loop control in strip annealing furnaces Loop control in rod and bar mills Loop control in strip coating processes The loop measurement sensors for rod and bar are based on a high
This is the second webinar of a threepart webinar series that will highlight the use of MathWorks products for modeling and control of a multistage rolling mill process. In this particular webinar you will learn how to use MathWorks products to model the looperstrip interaction for tension control.
achieve large changes in loop length during an abnormal rolling condition. Thus, the specications of dimensional quality and mass ow in hot rolling mills can be satised by proper control of the strip tension and looper angle. Figure 1 shows the tension and looper control in a typical nishing mill.
Looping mill definition, a rolling mill for bar stock, wire, and the like, having the successive stands side by side so that the metal forms a loop in passing from stand to stand. See more.
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