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Process for rolling H steel using trio mill

A three-roll mill and process technology, applied in metal rolling and other directions, can solve problems such as web eccentricity and web corrugation, and achieve the effects of avoiding web eccentricity, reducing quality requirements and reducing production costs.

Inactive Publication Date: 2004-06-16
李宝安
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned difficulties, simplify the production equipment and technology of H-shaped steel, avoid the occurrence of defects such as web eccentricity and web corrugation that may occur in the production of H-shaped steel with a universal rolling mill, and reduce the threshold for small and medium-sized iron and steel enterprises to produce H-shaped steel, the present invention provides A process for rolling H-beams with an ordinary three-roll mill (or two-roll mill)

Method used

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  • Process for rolling H steel using trio mill
  • Process for rolling H steel using trio mill
  • Process for rolling H steel using trio mill

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1, produce H150×75×5×7 (belonging to narrow side H-shaped steel) on Φ550×2+Φ500×1 three-roller tandem rolling mill, the process scheme is as follows figure 1 shown

[0021] The rolling mill has three stands, the length of the roll body is 1500mm, and each roll can be configured with four passes.

[0022] The steel billet used is a 150×150 square billet. Both the deep-cut hole and the extended hole adopt the bending oblique rolling method. A total of 7 passes are rolled to obtain an I-shaped intermediate billet, and then enter the edge rolling control hole to obtain the basic thickness of the leg. A uniform rolled piece enters two parallel straight-leg oblique rolling passes with opposite opening directions to obtain standard H150×75×5×7 products.

[0023] The main pass sizes are:

[0024] Edge control hole: the leg end width is 7mm, and the leg height is 37mm.

[0025] Parallel straight leg oblique rolling hole: the thickness of the opening leg of the fini...

Embodiment 2

[0027] H100×100×6×8 (belonging to wide-side H-beams) is produced on the Φ550×2+Φ500×1 three-roller tandem mill. The process plan is as follows figure 1 shown

[0028] The rolling mill has three stands, the length of the roll body is 1500mm, and each roll can be configured with four passes.

[0029] The steel billet used is a rectangular billet of 120×200. Both the deep-cutting hole and the extending hole adopt the bending oblique rolling method, and a total of 9 passes are rolled. The I-shaped intermediate billet obtained is then entered into the edge rolling control hole to obtain the leg. A rolled piece with a substantially uniform thickness enters two parallel straight-leg oblique rolling passes with opposite opening directions to obtain a standard H100×100×6×8 product.

[0030] The main pass sizes are:

[0031] Edge control hole: leg end width 8mm, leg height 48mm.

[0032] Parallel straight leg oblique rolling hole: the thickness of the opening leg of the finished hole...

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Abstract

The invention relates to a process for rolling I-section steel using the common three-high mill, wherein after heating square bloom, rectangular bloom or special-shaped bloom, an intermediate blank similar to I-beam steel is rolled using the common three-high mill, and entering parallel wing ring hole system for rolling, then entering in turn two parallel inclined rolling hole mould with opposite opening directions, the inner and outer walls are fabricated in the open slot to make them parallel, the leg sides are processed into qualified shape in the closed end until the final I-section steel product is achieved.

Description

Technical field [0001] The invention relates to a process for rolling H-shaped steel with a common three-roll mill (or two-roll mill), and belongs to the technical field of metal pressure processing. Background technique [0002] H-beam is also called parallel flange I-beam, and its cross-sectional shape is similar to the English letter "H", so it is called H-beam. H-shaped steel is a high-efficiency profile with more optimized cross-sectional area distribution and relatively large strength and weight. It has a large section coefficient, strong bending resistance, and saves metal. It is an economical section steel. [0003] The production of H-shaped steel requires a universal rolling mill, which has complex processes, large equipment investment, and complex and huge equipment. The production of H-shaped steel by universal rolling mill requires very high technical quality of personnel, difficult operation and maintenance, and defects such as web eccentricity and web corruga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/08
Inventor 李宝安
Owner 李宝安
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