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

A technology of limiting speed and production process, which is applied in the modeling field of determining the optimal limiting speed of mandrel in the production process of seamless steel pipe, which can solve the complex calculation of the maximum limiting speed of mandrel, which is unfavorable for the steel pipe rolling industry. and other problems to achieve the effect of improving service life and product quality, avoiding production risks, and reducing mandrel wear

Inactive Publication Date: 2015-01-21
CENT SOUTH UNIV
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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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  • Modeling method for determining optimum mandril movement limiting speed in seamless steel tube production process
  • Modeling method for determining optimum mandril movement limiting speed in seamless steel tube production process
  • Modeling method for determining optimum mandril movement limiting speed in seamless steel tube production process

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Embodiment 1

[0033] Embodiment 1: The specific implementation steps of the present invention are illustrated by taking the model for setting the maximum value of the mandrel limit speed when the outer diameter of the mandrel is 187mm as an example.

[0034]In actual production, the factors affecting the maximum set value of the mandrel limit speed include the length of the blank pipe and the exit speed of the end frame of the steel pipe. It can be known from process knowledge and experience that the longer the length of the blank pipe, the smaller the maximum limit speed of the mandrel should be set, and the greater the exit speed of the steel pipe, the greater the maximum limit speed of the mandrel should be set. According to the process setting and on the premise of ensuring smooth production, the calculation process is as follows:

[0035] Step 1: Taking the batches whose rolling plan is 235mm in capillary outer diameter, 16mm in wall thickness, 199.54mm in barren tube in outer diameter...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 陈鑫吴敏曹卫华朱明杰
Owner CENT SOUTH UNIV
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