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Classification processing method for incoming material length direction plate shape of steel plate cold straightening machine
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A treatment method, cold straightening technology, applied in the field of metallurgy, can solve the problems of no technology, introduction, etc.
Active Publication Date: 2014-11-05
BAOSHAN IRON & STEEL CO LTD
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[0006] However, there are many processes involved before steel plate straightening, especially in warm straightening and cold straightening. Fluctuate within a certain range
In this regard, there is no introduction of relevant technologies in domestic and foreign patents or public information retrieval
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Embodiment 1
[0067] Due to the relatively poor process control accuracy and logistics management in this production process, the classification process is as follows:
[0068] The first step is to determine the maximum warpage λ of the steel plate L .
[0069] According to the display of hot straightening exit plate shape, λ LH =25mm / m,
[0070] According to the temperature control requirements of hot straightening outlet, considering the smooth organization of on-site logistics and the level of on-site management and process control, there is, λ LC =-20.53784mm / m,
[0071] Available, λ L =λ LH -λ LC =25+20.53784=45.53784 mm / m.
[0072] The second step is to judge the shape of incoming materials, classify them, and formulate corresponding straightening procedures.
[0073] because Then 2 passes of straightening are required, and the first pass needs to adopt a large deformation straightening scheme.
Embodiment 2
[0075] The parameters of steel plate and cold straightening machine are the same as above. Considering that the latest design of SMS is used in this embodiment, the control accuracy of each process in the steel plate production process is relatively high, and the requirement that the height of the buckle head of the incoming material exceeds the limit can be ignored. The classification processing flow of the plate shape in the length direction of the steel plate is as follows:
[0076] The first step is to calculate the maximum warpage λ of the steel plate L .
[0077] According to the display of hot straightening exit plate shape, λ LH =20mm / m,
[0078] According to the temperature control requirements of hot straightening outlet, considering the smooth organization of on-site logistics and the level of on-site management and process control, there is, λ LC =-5.1543mm / m,
[0079] lambda L =λ LH -λ LC =20+5.1543=25.1543mm / m,
[0080] The third step is to judge the sha...
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Abstract
A classification processing method for an incoming material length direction plate shape of a steel plate cold straightening machine is characterized in that the classification method for the steel plate length direction warping degree includes that when a height of steel plate warping and turning down can not conform to a condition of opening a roll gap, the plate shape range of a steel plate before being straightened is determined according to the production technology process and material property of the steel plate, and namely the largest warping degree value lambada L of the steel plate is determined; the plate shape control range of one time straightening for the steel plate is determined according to straightening machine capacities and steel plate material property, and namely the largest warping degree lambada L max of the steel plate which can be flattened by the straightening machine is determined, if the largest warping degree value lambada L of the steel plate is smaller than the lambada L max, the one time straightening is determined, when the lambada L is larger than or equal to a lambada 1* lambada L max, a large deformation straightening scheme is utilized, and when the lambada L is smaller than a lambada 1* lambada L max, a small deformation straightening scheme is utilized; and if the actual largest warping degree lambada L of the steel plate is larger than the lambada L max, a multi-time straightening scheme is determined. According to the classification method, the incoming material plate shape can be reasonably analyzed and processed, after a plate shape control method is set, the relative plate shape value can be used during calculation, and consequently the plate shape set calculation result is accurate.
Description
technical field [0001] The invention relates to the field of metallurgy. Specifically, the present invention relates to a shape control method for steel plate straightening, and more particularly, the present invention relates to a method for classifying the shape of incoming materials in the shape control of steel plate straightening. Background technique [0002] In the field of metallurgy, when straightening steel plates, in order to ensure the straightening effect, it is necessary to reasonably divide the incoming plate shape, and then adopt different straightening strategies. [0003] For example, for wide and thick plates, the production process generally needs to go through multiple processes such as continuous casting, heating, rough rolling, finish rolling, pre-straightening, rapid cooling, hot straightening, heat treatment, warm straightening, and cold straightening. Due to the higher and higher requirements of users on the organizational performance, dimensional ...
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