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Hot rolled steel coil nominal width derivation method considering both cold rolling yield and production stability

A technology of nominal width and stability, applied in metal rolling, metal rolling, rolling mill control devices, etc., can solve the problems of cutting edge, cutting edge, affecting production line production stability, uncleanness, etc.

Inactive Publication Date: 2021-06-04
TANGSHAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There needs to be a reasonable derivation method for the nominal width of the hot-rolled steel coil for cold rolling. If the nominal width of the hot-rolled steel coil is too large, the yield of cold-rolled steel will decrease. If the nominal width of the hot-rolled steel coil is too small, it will lead to During the production process, the trimming edge cannot be cut or the trimming edge is not clean, which will affect the production stability of the entire production line

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: Taking galvanized products as an example, the order information is: the nominal thickness of cold rolling is 1.0mm, the nominal width of cold rolling is 1250mm, the steel type is DX51D+Z, the implementation standard is EN10346:2015, acid rolling trimming.

[0009] Firstly, determine the necking amount of acid rolling and galvanizing according to the steel type and specification respectively. The necking amount of acid rolling is 1mm, that of galvanizing is 2mm, and the total necking amount of cold rolling process is 3mm.

[0010] The order is pickling trimming, so when deriving the nominal width of the hot-rolled steel coil, the minimum trimming amount is taken as the minimum trimming amount of the pickling trimming shears, which is 14mm (7mm on one side).

[0011] The cold rolling delivery tolerance of this order can be found according to the steel type, specification and implementation standard, which is 0mm-6mm. In order to ensure the controllable precisio...

Embodiment 2

[0013] Example 2: Taking galvanized products as an example, the order information is: cold-rolled nominal thickness is 1.0mm, cold-rolled nominal width is 1250mm, steel type is DX51D+Z, implementation standard is EN10346:2015, galvanized trimming.

[0014] Firstly, determine the necking amount of acid rolling and galvanizing according to the steel type and specification respectively. The necking amount of acid rolling is 1mm, that of galvanizing is 2mm, and the total necking amount of cold rolling process is 3mm.

[0015] The order is for galvanized edge trimming, so when deriving the nominal width of the hot-rolled steel coil, the minimum trimming amount is taken as the minimum trimming amount of galvanized edge trimming shears, which is 10mm (5mm on one side).

[0016] The cold rolling delivery tolerance of this order can be found according to the steel type, specification and implementation standard, which is 0mm-6mm. In order to ensure the controllable precision of the col...

Embodiment 3

[0018] Example 3: Taking continuous annealing products as an example, the order information is: the nominal thickness of cold rolling is 2.0mm, the nominal width of cold rolling is 1200mm, the steel type is Q235, the implementation standard is GB / T11253-2007, continuous annealing trimming.

[0019] First, determine the necking amount of pickling rolling and galvanizing according to the steel type and specification respectively. The necking amount of acid rolling is 0mm, the necking amount of continuous shrinkage is 1mm, and the total necking amount of cold rolling process is 1mm.

[0020] The order is continuous annealing and trimming, so when deriving the nominal width of the hot-rolled steel coil, the minimum trimming amount is taken as the minimum trimming amount of the continuous annealing and trimming shears, which is 10mm (5mm on one side).

[0021] The cold rolling delivery tolerance of this order can be found according to the steel type, specification and implementation...

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Abstract

The invention relates to a hot rolled steel coil nominal width derivation method considering both the cold rolling yield and the production stability, and belongs to the technical field of steel rolling. According to the technical scheme, the method comprises the steps that firstly, according to different steel types and different specifications, the necking amount of different processes of a cold rolling area is determined, and therefore the total necking amount of the cold rolling process is obtained; different minimum trimming amounts of trimming shears are taken according to the change of trimming positions when the nominal width of a hot rolled steel coil is deduced by considering different trimming capacities of the trimming shears of a cold rolling post-processing line and an acid rolling line; and the nominal width of the hot rolled steel coil considering the cold rolling delivery tolerance is equal to the sum of the cold rolling nominal width, the total necking amount of the cold rolling process, the minimum trimming amount of one trimming shear and the cold rolling delivery tolerance. The method has the beneficial effects that the total necking amount of the cold rolling process and the minimum trimming amounts of the trimming shears are comprehensively considered, the cold rolling yield can be increased, and the production stability of a cold rolling production line can be guaranteed.

Description

technical field [0001] The invention relates to a method for deriving the nominal width of a hot-rolled steel coil while taking into account the yield of cold-rolled products and production stability, and belongs to the technical field of steel rolling. Background technique [0002] At present, cold-rolled products are delivered with cut edges, and must be guaranteed to be within the tolerance range required by the standard. There needs to be a reasonable derivation method for the nominal width of the hot-rolled steel coil for cold rolling. If the nominal width of the hot-rolled steel coil is too large, the yield of cold-rolled steel will decrease. If the nominal width of the hot-rolled steel coil is too small, it will lead to During the production process, the trimmed edge cannot be cut or the trimmed edge is not clean, which will affect the production stability of the entire production line. Contents of the invention [0003] The purpose of the present invention is to p...

Claims

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Application Information

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IPC IPC(8): B21B37/18B21B37/22
CPCB21B37/18B21B37/22
Inventor 史建伟裴宏江李月林谷田刘大亮梁振威冯俊娟解鸽王麒
Owner TANGSHAN IRON & STEEL GROUP