A method for edge drop control of cold-rolled non-oriented silicon steel
A control method and technology for oriented silicon steel, applied in rolling mill control devices, metal rolling, metal rolling, etc., can solve the problems of low control accuracy of strip transverse thickness uniformity
Active Publication Date: 2015-11-18
ANGANG STEEL CO LTD
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[0006] The present invention provides a method for edge drop control of non-oriented silicon steel cold-rolled by a universal crown mill with the function of lateral shifting of intermediate rolls and work rolls, that is, UCMW (Universal Crown mill with Middle and Workshifting roll), aiming at solving the problem of strip lateral in the silicon steel production process. The problem of low control precision of thickness uniformity, so as to increase the lamination rate of non-oriented silicon steel, and achieve the purpose of improving the quality pass rate of cold-rolled silicon steel products
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[0058] Such as figure 1 As shown, the existing specific point position is selected at 15mm from the edge, and the position of the reference point is selected at 115mm from the edge. Take the 1500mm UCMW mill of a cold-rolled silicon steel mill to roll 0.5mm thick electrical steel as an example, the strip width is 1250mm, and the edge drop value is known EH =125μm, the distance between the starting point of edge drop and the edge of the strip is 40mm. The taper design of the single-sided taper roll is as image 3 As shown, the difference between the amount of roll flattening in the taper part and the amount of flat roll in the roll body part PV =0-20μm, the taper of the Taper roll can be calculated according to the formula:
[0059]
[0060] According to the strip width SW=1250mm, the distance TSP=[1500-1250+2(EW+10)] / 2=175mm from the starting position of the taper to the edge of the roll can be determined.
[0061] In order to effectively evaluate the effect of edge thinning con...
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The invention provides an edge drop control method of cold-rolled non-oriented silicon steel. The edge drop control method includes that a cold rolling five frame and all six roller rolling mill is utilized as an object; an objective function is that the horizontal thickness difference of the non-oriented silicon steel is minimum; the complete set of working roller forecast and feedback and working roller bending compensation control method for edge thinning control of the non-oriented silicon steel is established through introduction of an efficiency effected function array. According to the edge drop control method of the cold-rolled non-oriented silicon steel, the original control device is fully utilized; the maintenance is easy; the technology import capital investment is saved; meanwhile the influence on the flatness control accuracy can be effectively reduced and the horizontal thickness control accuracy of the non-oriented silicon steel can be improved to enable the horizontal thickness difference to decrease from 25 microns to 8 microns below and accordingly the laminated rate of the non-oriented silicon steel finished product and the qualified rate of the quality of the finished product are improved and a new solution is provided to adapt to the edge drop control presetting and feedback of industrial application.
Description
Technical field [0001] The invention belongs to the field of automatic steel rolling control, and in particular relates to an edge drop control method for cold-rolling non-oriented silicon steel. Background technique [0002] Cold-rolled silicon steel, as an excellent, high-efficiency, energy-saving, and large-volume, excellent soft magnetic functional material developed by the country is the top priority of the variety and structure adjustment of my country's iron and steel industry. It is widely used in electric power, electromechanical, post and telecommunications and military industries. Electromagnetic properties and lateral thickness difference are important quality indicators of cold-rolled non-oriented silicon steel. The lateral thickness difference determines the lamination coefficient of silicon steel. Therefore, in order to improve the efficiency of motors and transformers, users not only have strict requirements on the electromagnetic performance of silicon steel, but...
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IPC IPC(8): B21B37/16
Inventor 张岩王军生刘宝权秦大伟柴明亮高健费静侯永刚宋君吴萌
Owner ANGANG STEEL CO LTD