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Design method for roller diameter of four-roller high-strength steel planishing mill
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A design method and technology of tempering machine, applied in calculation, special data processing applications, instruments, etc., can solve problems such as no retrieval, blank design of high-strength steel tempering machine roll diameter, etc.
Inactive Publication Date: 2008-11-26
河北燕大科技开发有限公司
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Problems solved by technology
However, due to the needs of intellectual property protection and technology monopoly, these technologies have not been publicly promoted and used, and are still in the confidential stage. Up to now, no foreign literature on the roll diameter design of high-strength steel pass mills has been retrieved. The research on roll diameter design technology of steel tempering machine is still the focus of technology development of steel companies in various countries
[0004] In China, the research on roll diameter design of high-strength steel pass mill is blank, and no relevant literature has been retrieved
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Embodiment 1
[0052] According to the rolling theory, the total rolling pressure of the high-strength steel leveler can be expressed by the function shown in the following formula:
[0053] P=f(D w , B, H, ε, σ s , T 1 , T 0 , Μ)
[0054] Where: P-total rolling pressure;
[0055] D w -Work roll diameter;
[0056] B-strip width;
[0057] H- the thickness of the incoming material;
[0058] ε-flat elongation;
[0059] σ s -Material strength;
[0060] T 1 , T 0 -Fore and aft tension;
[0061] μ-coefficient of friction.
[0062] In the roll diameter design process, the tension T can be made 1 = T 2 =0.2σ s0 . At the same time, according to the characteristics of the leveler, the friction coefficient is set to μ = 0.2. Finally, according to the production outline and considering the fluctuation of material properties, take the material strength σ s =1.1σ s0 . In this way, the above formula can be expressed as:
[0063] P=f(D w , B, H, ε)
[0064] According to the relevant literature, the front tensio...
Embodiment 2
[0110] Obviously, after analysis, it can be known that a single leveling process C n The optimized result of, has no guiding value for the actual roll diameter design of the leveler, because it is impossible to design a set of rolls for each rolling process in the actual production process. Therefore, the truly meaningful roll diameter optimization design plan is to provide an optimal work roll and support roll diameter, so that the roll is rolling all specifications of products (in actual production, generally choose the m The product of each specification should be optimized, and should be weighted according to its probability of occurrence. The more frequently produced products, the greater the weighting coefficient obtained). When the plate shape is very good, the pressure between the rollers is very uniform, and the mechanical performance is satisfied. Claim. At this time, the objective function of the optimal design should be expressed by the following formula:
[0111] ...
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Abstract
This invention relates to a design method for roller diameter of four-roller high-strength steel planishing mill, which comprises the following steps: (a) gathering the production outline for being-designed temper mill; (b) gathering correlated feature parameters; (c) according to the outline, grouping all products by given rule; (d) searching the optimal parameters for single temper process; (e) taking integrated optimum design. Wherein, it makes a compromise to plate shape and roller consumption by making both the tension of strap steel before output and horizontal pressure distribution among rollers as optimized objective functions and letting all steel product mechanical properties meet outline request as constraint condition. Thereby, This invention can ensure product shape quality, reduces roller consumption, and meets total mechanical request.
Description
Technical field [0001] The invention relates to a leveling design technology, in particular to a design method for the roll diameter of a four-roll high-strength steel leveler. Background technique [0002] In recent years, with the rapid development of the automotive industry, users’ requirements for automotive sheets have become higher and higher. The original pursuit of good deep-drawing properties has changed to requiring materials to take into account both deep-drawing properties and strength properties. Therefore, it has promoted steel Enterprises vigorously develop high-strength steel. The development and production of high-strength steel has become a measure of the level of production of steel enterprises. As a process of high-strength steel production close to the finished product, the leveler directly affects the mechanical properties, plate shape, surface quality and other technical indicators of the finished high-strength steel. Therefore, the design technology of the...
Claims
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