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Method for rolling trapezoidal width steel plate

A steel plate and width technology, which is applied in the rolling field of trapezoidal width steel plates, can solve the problems of reducing steel plate utilization efficiency and reducing yield

Inactive Publication Date: 2006-10-25
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The width of the conventional steel plate is basically constant in the length direction, but for structural parts, in many cases, the width along the length direction is not the same, so it is necessary to cut the same width of the plate to make the width change Changes, which will reduce the utilization efficiency of the steel plate and reduce the yield, such as figure 1 shown

Method used

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  • Method for rolling trapezoidal width steel plate
  • Method for rolling trapezoidal width steel plate
  • Method for rolling trapezoidal width steel plate

Examples

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Effect test

Embodiment 1

[0142] Dimensions Thickness 180mm×Width 1400mm×Length 2200 Blank, according to figure 1 It is required to roll a variable width steel plate of 18mm×2200mm-2400mm×10000mm, the longitudinal rigidity of the rolling mill is 6000kN / mm, the zero pressure is 15000kN, the roll radius is 460mm, the maximum allowable rolling force is 35000kN, and the maximum allowable rolling moment is 2750kNm. The maximum rollable width is 2800mm, the maximum opening of the steel transfer table is 4000mm, the maximum compression ratio is 2.5, and the minimum compression ratio is 1.05.

[0143] (1) First, it is necessary to determine the size of the target step thickness in the forming stage

[0144] (1.1) Calculate the thickness and length of the thinner part of the stepped plate in the forming stage

[0145] Corresponding to the maximum rollable width, the minimum value h of the target thickness in the forming stage can be obtained ts1

[0146] h ts ...

Embodiment 2

[0203] Dimensions Thickness 220mm × Width 1600mm × Length 2400mm Blank, according to figure 1 It is required to roll into 25mm×2300mm-2600mm×10000mm variable width steel plates, the longitudinal rigidity of the rolling mill is 8000kN / mm, the zero pressure is 25000kN, the roll radius is 500mm, the maximum allowable rolling force is 55000kN, and the maximum allowable rolling moment is 5000kNm. The maximum rollable width is 3200mm, the maximum opening of the Zhuangang roller table is 4800mm, the maximum compression ratio is 2.5, and the minimum compression ratio is 1.05.

[0204] (1) First, it is necessary to determine the size of the target step thickness in the forming stage

[0205] (1.1) Calculate the thickness and length of the thinner part of the stepped plate in the forming stage

[0206] Corresponding to the maximum rollable width, the minimum value h of the target thickness in the forming stage can be obtained ts1

[0207] h ts ...

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Abstract

The present invention relates to a rolling method of stepped width steel plate. It utilizes longitudinal-transverse-longitudinal rolling tactics of heavy and medium plate to produe variable width steel plate. Said method includes the following steps: firstly, rolling the steel plate into variable thickness steel plate in last pass of forming stage, before rolling defining size of variable thickness steel plate, according to conventional rolling method making forming rolling, rolling steel plate to make its thickness size be above 2-10 mm, then utilizing rolling method of variable thickness steel plate, adding a pass and rolling steel plate to make its thickness meet size requirement, then making widening rolling operation so as to obtain the invented stepped width steel plate.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a rolling method of a trapezoidal width steel plate. Background technique [0002] The width of the conventional steel plate is basically constant in the length direction, but for structural parts, in many cases, the width along the length direction is not the same, so it is necessary to cut the same width of the plate to make the width change Changes, which will reduce the utilization efficiency of the steel plate and reduce the yield, such as figure 1 shown. So it would be very useful if the trapezoidal width steel plate could be produced directly in the rolling process. Contents of the invention [0003] Aiming at the shortcomings of the existing processing methods for steel plates with trapezoidal widths, the invention provides a rolling method for steel plates with trapezoidal widths. [0004] Firstly, the rolling strategy of medium and heavy plates adopts the ver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B1/22B21B37/16B21B37/22B21B37/58B21B37/64
Inventor 胡贤磊刘相华何纯玉矫志杰王君王昭东赵忠
Owner NORTHEASTERN UNIV LIAONING
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