Method for reducing finish mill steel biting impact

A finishing mill and steel biting technology, which is applied in metal rolling, metal rolling, and keeping the roll equipment in an effective state, can solve the problems of threatening equipment safety, prone to steel sticking, and large spindle load, so as to reduce steel biting. Impact, reduce impact, ensure the effect of production forward

Inactive Publication Date: 2017-06-27
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

However, after the addition of the roughing mill, the load on the main shaft of the finishing mill is still heavy. In extreme cases, the peak torque can reach more than 5250KNM at the moment of steel bite, and steel jamming is prone to occur, which directly threatens the safety of the equipment.

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  • Method for reducing finish mill steel biting impact
  • Method for reducing finish mill steel biting impact
  • Method for reducing finish mill steel biting impact

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Embodiment Construction

[0013] The method for reducing the steel biting impact of a finishing mill of the present invention will be further described in detail below in conjunction with the drawings and specific embodiments, but it is not intended to limit the present invention.

[0014] The excessive impact load of the steel biting of the finishing mill is mainly caused by the unreasonable distribution of the reduction pass, the factors of the slab itself (such as low temperature, warped head, etc.), and inaccurate pass calculation of the upper computer. These reasons are ultimately reflected in the factor of reduction.

[0015] The existing methods to improve the impact of steel biting in finishing mills usually adopt the strategy of changing the reduction in the finishing rolling stage. However, changing the reduction may affect the thickness of the slab at the finish rolling exit, which in turn affects the thickness of the product.

[0016] The present invention provides a method for reducing the impac...

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Abstract

The invention relates to a method for reducing the steel bite impact of a finishing mill. In the rough rolling process set before the finishing rolling process: in the penultimate pass, when the slab is rolled to the set position, the The reduction increases by the set value; in the penultimate pass, the reduction of the rolling rolls is set to zero. The method for reducing the steel bite impact of the finishing mill in the present invention effectively reduces the impact of the finishing mill's steel bite without changing the control logic of the finishing mill, protects the work rolls and main shafts of the finishing mill, and ensures the smoothness of the rolling line. The production runs smoothly, which can meet the production process and ensure the safety of the finishing rolling equipment.

Description

Technical field [0001] The invention relates to a method for reducing the steel biting impact of a finishing mill. Background technique [0002] In the prior art, in order to reduce the load of the finishing mill, a roughing mill was added before the finishing mill. However, after the newly added rough rolling mill, the load on the main shaft of the finishing mill is still very large. In extreme cases, the torque peak can reach more than 5250KNM at the moment of biting steel, and steel jams are prone to occur, which directly threatens the safety of the equipment. [0003] The specific manifestations of the excessive impact load of the steel biting of the finishing mill include: the biting steel cannot bite, the main motor overcurrent, the spindle over-torque protection limit, and the rolling force exceeds the limit. These problems can have devastating effects on the work roll body of the finishing mill, the oil film bearing of the support roll, the main motor, and the main shaft. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B28/00
CPCB21B28/00
Inventor 张栋
Owner BAOSHAN IRON & STEEL CO LTD
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