Modeling method for determining optimum mandril movement limiting speed in seamless steel tube production process

Abstract

The invention discloses a modeling method for determining the optimum mandril movement limiting speed in the seamless steel tube production process. The method comprises the steps that production parameters needed in the rolling process of steel tubes of a certain specification and a certain batch are obtained at first; the pierced billet length, the set steel tube outlet speed and the actual mandril movement limiting speed maximum value are obtained; the least square linear fitting method is adopted for fitting a function relation between the manrail movement limiting speed and the pierced billet length; then the least square linear fitting method is adopted for fitting a function relation between the steel tube outlet speed and the mandril movement limiting speed and under the certain pierced billet length in the actual production process; finally, the linear weighting method is adopted for building an optimum mandril movement limiting speed model, and the optimum mandril movement limiting speed is calculated. The modeling method has the advantages that calculation is simple and convenient and practicability is high, and is suitable for guiding setting of the mandril movement limiting speed in the rolling schedule in the seamless steel tube continuous rolling process.

Description

technical field [0001] The invention relates to a modeling method for determining the optimum limiting speed of mandrels in the production process of seamless steel pipes. Background technique [0002] Steel pipe is an economical steel and an important product in the iron and steel industry, usually accounting for about 10% of the total steel, known as "industrial blood vessel". As one of the important raw materials for national economic construction, seamless steel pipes are widely used in petroleum, electric power, chemical industry, coal, machinery, military industry, aerospace and other industries. [0003] The "Twelfth Five-Year Plan" of the State Council pointed out that in the face of problems such as the urgent need to upgrade the variety and quality of the iron and steel industry, the slow progress in layout adjustment, the strengthening of energy, environment, raw material constraints, and weak independent innovation capabilities, it is necessary to expand varietie...

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Problems solved by technology

[0007] Aiming at the problem that the calculation of the maximum value of the mandrel limit speed is complicated in the prior art, which is not conducive to the use in the steel pipe rolling industry, the present invention proposes a modeling method for determining the optimum mandrel limit speed in the production process of seamless steel pipes

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