A Torque Control Method of Straightening Machine for Improving the Reduction Effect of Continuous Casting Slab Solidification End
A technology of solidification end and reduction effect, which is applied in slab continuous casting production and bloom field, which can solve the problems of reducing billet extension deformation and uneven torque distribution, so as to improve reduction effect, improve output torque, and enhance casting billet The effect of internal quality
Active Publication Date: 2017-01-18
NORTHEASTERN UNIV LIAONING
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Problems solved by technology
Some patents also provide methods for torque control. For example, CN104001886A realizes the free distribution of the total load of the tension leveling unit on each tension leveler by introducing a load distribution coefficient, and realizes the automatic control of the drawing force through closed-loop adjustment; the patent CN101648264A aims at Uneven distribution of torque caused by reduction during soft reduction of blooms
The above-mentioned patents all propose a method for controlling the torque of the driving roller in the continuous casting production process, but none of them design a driving torque distribution method from the perspective of reducing the elongation deformation of the slab and improving the effect of the reduction process
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[0024] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0025] The present invention is applied to a 380mm×490mm bloom continuous casting machine in a steel plant, which has 12 tension levelers, including 10 compressible tension levelers, mainly for the production of medium and high carbon alloy steels such as bearing steel and cold heading steel . Among them, 2# to 9#, 11#, and 12# are equipped with driving rollers in the inner arc of the tension leveling machine. In this embodiment, the initial setting pulling speed is 0.5m / min, and the cast steel type is GCr15 bearing steel.
[0026] A method for controlling the torque of the tension leveling machine to improve the reduction effect of the solidification end of the continuous casting slab, such as figure 2 shown, including the following steps:
[0027] Step 1: During the solidification process of the continuous casting slab, each frequency...
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The invention relates to a method for controlling the torque of a straightening machine for improving the effect of continuous casting slab solidification end reduction. The method is that during the continuous casting slab solidification process, each frequency converter collects the actual output torque of the corresponding drive roller in real time, and calculates the current The total output torque of the strand, when the drawing and straightening machines are equally output during the solidification process of the continuous casting slab, the load factor of each driving roller is evenly distributed according to the number of drawing and straightening machines, and the set output of each driving roller The torque is the product of the total output torque and its corresponding load factor. When the drawing and straightening machines are not equal in the process of continuous casting slab solidification, the load factor of each drive roller is set according to the different continuous casting slab reduction areas. Determine the set output torque of each driving roller, and adjust the speed of each driving roller according to the deviation between the set output torque and the actual output torque of each driving roller.
Description
technical field [0001] The invention belongs to the field of continuous casting of blooms and slabs, and in particular relates to a method for controlling the torque of a tensioning and straightening machine for improving the effect of pressing down the solidification end of a continuous casting slab. Background technique [0002] Continuous casting slab dynamic soft reduction is an effective technology to improve the segregation and porosity of the continuous casting slab center. Its implementation principle is: by applying pressure (thermal stress and mechanical stress) near the end of continuous casting slab solidification to generate a certain amount of reduction It hinders the flow of molten steel containing enriched segregation elements to eliminate center segregation, and at the same time compensates the solidification shrinkage of continuous casting slabs to eliminate center porosity. The reduction interval refers to the implementation position of light reduction, wh...
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IPC IPC(8): B22D11/16
Inventor 祭程朱苗勇
Owner NORTHEASTERN UNIV LIAONING