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Rolling method and rolling device of uneven thickness steel plate

A steel plate and uniform thickness technology, which is applied in the rolling of uneven thickness steel plates and rolling equipment, can solve the problems of reduced yield of thick steel plates and distribution of surplus length, etc., and achieve the effect of increased yield

Active Publication Date: 2017-10-24
JFE STEEL CORP
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Problems solved by technology

[0011] Therefore, Patent Document 1 cannot accurately calculate the remaining lateral area between the actual lateral area (actual lateral area) and the estimated lateral area (estimated lateral area), and cannot allocate the optimal lateral area to the thick-walled part and the thin-walled part. Due to the extra length, there is a concern that the yield of uneven-gauge steel plates will decrease

Method used

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  • Rolling method and rolling device of uneven thickness steel plate
  • Rolling method and rolling device of uneven thickness steel plate
  • Rolling method and rolling device of uneven thickness steel plate

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Embodiment Construction

[0032] Hereinafter, modes for implementing the present invention (hereinafter, referred to as embodiments) will be described in detail with reference to the drawings.

[0033] figure 1 A reversible rolling mill 1 for obtaining uneven-gauge steel plates by rolling a slab S is shown.

[0034] The rolling mill 1 includes vertical work rolls 2 and vertical backup rolls 3 . The gap (roll gap) between the upper and lower work rolls 2 is adjusted by the gap changing mechanism 4 . The opening degree changing mechanism 4 sets and changes the opening degree of each pass according to an opening degree instruction from the controller 5 . The rolling load during rolling is detected by a load cell 6 , and the detected value is output to the controller 5 . Reference numeral 8 is a plate width meter (plate width meter) for measuring the plate width of the thick part Y mentioned later. Reference numeral 9 denotes table rolls for conveying the slab S toward the work rolls 2 . A first pulse...

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Abstract

The invention provides a rolling method and a rolling device for a steel plate with uneven thickness. The rolling method of the uneven-thickness steel plate provided by the invention can improve the yield of the uneven-thickness steel plate. The margin length of the thin portion is calculated based on the actual side cross-sectional area of ​​the thick portion calculated at the time of primary rolling (step ST1 ) (step ST7 ). Next, the rolling length of the thin portion is calculated so that the remaining side cross-sectional area is allocated to the thick portion and the thin portion according to the spare length of the thin portion (step ST8 to step ST12 ). Then, secondary rolling is performed by the calculated rolling length LX (Sx) of the thin portion.

Description

technical field [0001] The present invention relates to a rolling method and a rolling apparatus for producing a differential thickness steel plate (differential thickness steel plate) having a thick portion and a thin portion having a thickness different from the thick portion in the longitudinal direction. Background technique [0002] When manufacturing a thick plate, rolling is generally performed by distributing a plurality of orders for a product steel plate having the same thickness on one slab. However, in the case of small batches of product steel plates and insufficient delivery time, when no suitable combination object can be found, rolling is performed with a low yield. [0003] On the other hand, uneven-gauge rolling in which a plurality of product steel plates having different thicknesses are distributed to one slab and rolled thereby increases the degree of freedom in combination and realizes low yields that avoid rolling. [0004] Among the slabs to which th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/38B21B37/70
CPCB21B1/38B21B2205/02
Inventor 藤本健资大原孝幸高桥清一
Owner JFE STEEL CORP
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