Online rolling and hot-forming process of heat-state plate/strip and application thereof

A forming process and hot state technology, applied in the field of rolling in the iron and steel metallurgy industry, can solve the problems of thick steel plate, large section size, large equipment capacity, etc., and achieve low residual stress, small bending angle, and reduced processing costs. Effect

Active Publication Date: 2018-09-04
CISDI ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the steel used in the main building of the steel structure, its cross-sectional size is large, and the thickness of the steel plate is relatively thick (generally 10mm to 30mm). It is difficult to produce with existing cold-formation equipment. It can be very large and very uneconomical, so there are almost no cold-rolled forming equipment and products with a thickness ≥ 10mm on the market

Method used

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  • Online rolling and hot-forming process of heat-state plate/strip and application thereof
  • Online rolling and hot-forming process of heat-state plate/strip and application thereof
  • Online rolling and hot-forming process of heat-state plate/strip and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The invention provides an on-line rolling thermoforming process for hot plates / strips, which is used for hot bending forming of hot steel plates or strips, after the hot steel plates or strips are subjected to slitting process and hot bending process Become a section steel with a specified shape, wherein, the slitting process is before the hot bending process or the slitting process is after the hot bending process, and in the slitting process, the high temperature steel plate or strip is slit into strips; In the hot bending process, the high-temperature steel plate or steel strip is continuously hot-bent formed by the deformation roller group. The hot state and high temperature refer to the temperature range in which the steel plate or steel strip can be hot bent, and the temperature range is 500°C to 850°C.

[0053] This process utilizes the high temperature of the incoming material itself, which is convenient for continuous deformation of the plate or strip, and the ...

Embodiment 2

[0070] The present invention also provides an application of the online rolling thermoforming process of the hot plate / strip described in Embodiment 1 in the medium and thick plate rolling mill production line, the stations corresponding to the slitting process and the hot bending process (i.e. continuous hot bending Forming device 200) is arranged on the exit roller table of the medium and heavy plate rolling mill, see for details Figure 16 As shown, the continuous hot bending forming device 200 is arranged downstream of the finishing mill 104 of the medium and thick plate rolling mill production line, and the steel plate directly enters the slitting process and hot bending process from the rolling mill; thereby realizing continuous hot bending forming after hot rolling, fully utilizing The residual temperature of hot rolling.

[0071] Figure 15 Shown is a schematic elevational view of the continuous hot bending forming device 200 of the present invention arranged behind t...

Embodiment 3

[0079] On this basis, the present invention also provides an application of the online rolling thermoforming process of the hot plate / strip described in Embodiment 1 on the coil production line, wherein the continuous hot bending forming device 200 also includes the The slitting is before hot bending, the slitting is after hot bending, and the slitting and hot bending are carried out at the same time. The hot slitting unit 106 includes disc shearing and thinning cutting. The layout of the production line is similar to that of Embodiment 2, and the continuous hot bending forming device 200 is arranged behind the finishing mill or at the end of the rolling line. The difference is that the roughing mill 103 in this example is followed by a steckel mill 121 .

[0080] Figure 22 Shown is a schematic elevation view of the continuous hot bending forming device 200 of the present invention arranged behind the coil rolling mill 121 of the coil production line. Figure 23 It is a sch...

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PUM

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Abstract

The invention provides an online rolling and hot-forming process of a heat-state plate / strip. The online rolling and hot-forming process of the heat-state plate / strip is used for hot-bending and forming a heat-state steel plate or strip steel, so that the heat-state steel plate or the strip steel becomes profile steel with a specified space through a longitudinal cutting process or a hot bending process. The heat-state steel plate or the strip steel is firstly longitudinally cut and then hot-bent, firstly hot-bent and then longitudinally cut or longitudinal cut and hot-bent at the same time; during the longitudinal cutting process, the steel plate or the strip steel is longitudinally cut and slit; and during the hot bending process, the steel plate or the strip steel is continuously hot-bent and formed through a deformation compression roller group. According to the process, the heat-state plate / strip can be directly rolled and bent to form a specific profile steel cross section, and is longitudinally split into long-strip profile steel or a long-strip steel plate; and the long-strip profile steel can be directly used and can be further conveyed to a steel structure processing procedure so as to be welded into the profile steel. By adopting the new production process, the cutting and side processing procedures required for processing the steel plate into the profile steel can be omitted, and the required welding process is reduced or eliminated. The production cost is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of rolling in the iron and steel metallurgy industry, in particular to an online rolling thermoforming process for a hot plate / strip. Background technique [0002] Every year, the steel structure industry uses tens of millions of tons of steel for the construction of steel structure buildings. With the national policy of promoting prefabricated steel structure buildings, the demand for steel structure steel will increase significantly in the future. At present, the steel structure industry generally uses the combination welding of a large number of hot-rolled steel plates and a small amount of hot-rolled section steel to complete the main steel structure of the building. The finished hot-rolled steel plates need to be cut, assembled and continuously welded to meet the required cross-sectional shape. The cutting and welding process not only results in waste of materials and increased costs, but also requires ...

Claims

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Application Information

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IPC IPC(8): B21C37/00B21D13/04
CPCB21C37/00B21D13/045
Inventor 肖学文李宏图方建忠沈继刚
Owner CISDI ENG CO LTD
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