Method for preventing weld seam strip breakage of thin material strip steel

A strip welding and strip breaking technology, applied in welding equipment, auxiliary welding equipment, welding/cutting auxiliary equipment, etc., can solve the problems of high strip tension, enlargement, strip breaking, etc. The effect of avoiding weld breakage

Active Publication Date: 2018-12-18
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When passing through the tension leveler, the problem of high tension on the strip steel is magnified, especially when producing strip steel with a thin gauge below 0.3mm, it is very easy to cause strip breakage

Method used

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  • Method for preventing weld seam strip breakage of thin material strip steel
  • Method for preventing weld seam strip breakage of thin material strip steel
  • Method for preventing weld seam strip breakage of thin material strip steel

Examples

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Embodiment 1

[0025] Embodiment 1: see Figure 1-Figure 5 , a method for preventing weld seam breakage of thin strip steel, said method comprising the following steps: 1) welding control; 2) entry looper control; 3) continuous annealing control, 4) air knife control, 5) flattening correction control.

[0026], said step 1) Welding control; including using a wooden hammer to verify the weld 1-3 and a wooden hemispherical hammer to perform a hammer test on the weld 1-3; after the welding is completed, use a wooden hammer to test the weld 1-3 Hammering at 15 cm on the side and the middle position, if there is no cracking, the weld 1-3 is qualified; if cracking occurs, a second re-welding is required; the edge weld is set to asymmetrical edge filling operation, when the weld is in When the crescent scissors are ready to fill the edge, jog the position of the weld seam forward or backward by 5-10CM to ensure that there is more than 2CM shear at the weld seam after cutting. In this way, it can ...

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Abstract

The invention relates to a method for preventing weld seam strip breakage of thin material strip steel. The method is characterized by comprising the following steps of (1) welding control; (2) entryloop control; (3) continuous annealing control; (4) air knife control; and (5) leveling and withdrawing-straightening control. The method effectively avoids the technical problem of the weld seam strip breakage of the strip steel through the coordinated control of multiple steps.

Description

technical field [0001] The invention relates to a method for preventing weld seam breakage of thin strip steel, and belongs to the technical field of continuous hot-dip galvanizing. Background technique [0002] The main process of continuous hot-dip galvanizing unit includes: uncoiling - welding - inlet looper - lye cleaning - continuous annealing - zinc layer control - post-plating cooling - leveling and straightening - post-treatment - outlet looper - electrostatic oiling - coiling. In the prior art, during the welding process, in order to avoid the poor quality of the weld at both ends and the broken belt caused by stress concentration, we generally choose crescent shears to perform symmetrical shearing with the weld as the center on about 10 cm at both ends of the weld. Crescent as shown figure 1 , to ensure the safety of the weld. However, in actual production, shearing the crescent can effectively prevent the occurrence of weld tearing caused by stress concentration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K33/00B23K37/00
CPCB23K33/00B23K37/00
Inventor 何锐孙磊
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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