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Method for improving laser welding seam strength of panel and web in T-shaped joint

A technology of weld strength and web plate, applied in the field of T-joint welding, can solve problems affecting the performance of sandwich structures

Inactive Publication Date: 2021-09-14
SHANGHAI JIAO TONG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent document still has the defect that the upper part of the panel is wider, and the joint between the web and the panel is narrower, which affects the performance of the sandwich structure

Method used

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  • Method for improving laser welding seam strength of panel and web in T-shaped joint
  • Method for improving laser welding seam strength of panel and web in T-shaped joint
  • Method for improving laser welding seam strength of panel and web in T-shaped joint

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0033] A kind of method of the present invention improves the laser welding seam strength of face plate and web in T-joint, comprises the following steps:

[0034] Step 1: Decontaminate the welding surface of the panel and web in the T-joint to be welded, and fix the welding tooling. After the tooling is fixed, ensure that the gap between the panel and the web is less than 0.4mm;

[0035] Step 2: Laser weld the panel and web to be welded with a double beam welding head with adjustable spacing and adjust...

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Abstract

The invention provides a method for improving the laser welding seam strength of a panel and a web in a T-shaped joint. The method comprises the following steps that decontamination treatment is carried out on the welding surfaces of the panel and the web in the T-shaped joint to be welded, a welding tool is fixed, and it is ensured that the gap between the panel and the web is less than 0.4 mm after the tool is fixed; a panel to be welded and a web to be welded are subjected to laser welding through a double-beam welding head with the adjustable distance and the adjustable power distribution; according to the thickness of the panel and the web, the distance between the centers of the two light beam spots is selected to be 1-3 mm, and the included angle between the connecting line of the centers of the two light beam spots and the vertical welding direction is smaller than or equal to 10 degrees; and the double beams adopt the same power and defocusing amount, and penetration welding of the panel and the web is completed with appropriate welding parameters. The width of the joint of the panel and the web is increased, the bonding strength and rigidity between the panel and the web in the sandwich structure T-shaped joint are improved, and a new thought is provided for improving the performance of the welding seam of the sandwich structure of the marine clamping plate or the bulkhead.

Description

technical field [0001] The invention relates to the technical field of T-joint welding in a sandwich structure, in particular to a method for improving the laser weld strength of a panel and a web in a T-joint. Background technique [0002] The metal sandwich sandwich structure improves the strength, rigidity, safety and reliability of the ship, and reduces the weight by 40%, which improves production efficiency and reduces manufacturing costs, and has been widely used in European ships and other fields. The laser welding method is usually used in the manufacturing process of the sandwich structure. Using the characteristics of good penetration and deep penetration of laser welding, welding is performed on the panel. The laser beam is incident perpendicular to the surface of the panel and melts the panel. Under the action of the laser beam energy Form deep-penetrating small-hole welding, penetrate the panel, and further melt the web next to the panel to realize the connectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/50B23K26/21B23K26/70
CPCB23K26/50B23K26/21B23K26/702
Inventor 崔海超马江坤吴广明韩正君芦凤桂邵晨东兰玲任闻杰王高飞
Owner SHANGHAI JIAO TONG UNIV
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