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Production process for C-shaped channel steel

A production process, C-shaped groove technology, applied in the direction of metal rolling, etc., can solve the problems of tensile strength, yield strength, fatigue strength, dimensional tolerance, straightness and distortion, tilt, etc., and achieve high fatigue strength. , straightness, and low distortion

Inactive Publication Date: 2012-01-25
无锡市佳之华轨道交通科技有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The C-shaped channel steel production method of the prior art all adopts hot rolling, and the shortcoming of this hot-rolled C-shaped channel steel is: 1. Dimensional tolerance, straightness and torsion are all relatively large, and the cooperation with the bolt is not tight, and it is easy to tilted, not vertical
2. The tensile strength, yield strength and fatigue strength are relatively small, which poses considerable hidden dangers to the quality of the project

Method used

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Examples

Experimental program
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Embodiment Construction

[0020] Shown is a production process of C-shaped channel steel, comprising the following steps:

[0021] (1) Hot rolling: φ110 round steel is used, the material is Q235, the material is heated to 1200 ° C, and rolled in 11 passes, and the cross section of the material is rolled into the shape of the expanded cross section of the C-shaped channel steel;

[0022] (2) Rolling head: In order to allow the material to enter the mold in the next process, one end of the hot-rolled material is rolled to a size smaller than that of the cold-rolled mold;

[0023] (3) Shot peening: remove the surface scale of the hot-rolled material by shot peening with a shot peening machine;

[0024] (4) Cold rolling: Cold rolling is carried out on the shot blasted material to eliminate the dimensional error in the hot rolling process and facilitate the cold drawing of the product;

[0025] (5) Annealing: Anneal the cold-rolled material, and set the temperature at 680°C to eliminate cold hardening duri...

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Abstract

The invention discloses a production process for C-shaped channel steel. The production process comprises the following steps of: hot-rolling the section of a blank body material into an unfolded shape of the section of the C-shaped channel steel; correcting the size through cold rolling; cold-bending the section of the material into a shape which is the same as the section of the finished C-shaped channel steel; and improving the size precision of the product by cold-drawing and straightening and thus producing the finished C-shaped channel steel. The C-shaped channel steel processed by using the method has the advantages that: the size tolerance is small, the linearity is low and the torsion degree is small; and under the matching of a bolt, the C-shaped channel steel is high in tensilestrength, tensile yield strength, fatigue resistance and the like.

Description

technical field [0001] The invention belongs to the field of metal profile processing, in particular to a production process of C-shaped channel steel. Background technique [0002] A C-shaped pre-buried channel is pre-embedded in the concrete as a whole, and the C-shaped cavity is left to hang bolts for hanging products, including C-shaped channel steel and welded parts on the back of the C-shaped channel steel. This C-shaped channel steel requires a maximum vertical tensile force > 90 KN, a vertical yield tensile force > 66 KN, an external dimension of ±0.5, and the consistency of dimensional tolerances. The C-shaped channel steel production method of the prior art all adopts hot rolling, and the shortcoming of this hot-rolled C-shaped channel steel is: 1. Dimensional tolerance, straightness and torsion are all relatively large, and the cooperation with the bolt is not tight, and it is easy to Produces a slant, not vertical. 2. The tensile strength, yield stren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P17/00B21B1/14
Inventor 常国华常龙生
Owner 无锡市佳之华轨道交通科技有限公司
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