Laser-electric resistance seam welding in-phase compound welding method of frame-covering structure

A skeleton structure, resistance seam welding technology, applied in laser welding equipment, roller electrode welding, welding equipment, etc., can solve the problems of narrow weld seam and low shear strength of weld seam, improve weld seam structure, improve static load and fatigue resistance, and improve the effect of mechanical properties
CN101306491AInactive Publication Date: 2008-11-19HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2008-11-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

A laser and electric-resistance seam-welding synchronous composite welding method for an envelope-framework structure relates to a novel laser and electric-resistance seam-welding synchronous composite welding method, belongs to the welding field, and aims to solve the problems in welding the envelope-framework structure by the single laser, such as narrow seam, low shear strength of the seam, a plurality of air vents on the faying surface of the envelope and the framework. The invention aims at the workpiece with the envelope-framework structure to be welded, and adopts the laser and the electric-resistance seam-welding synchronous composite welding; the electric-resistance seam-welding adopts double-roller single-side welding, two roller electrodes are disposed on the front and the back sides of the upper top surface of the envelope along the seam formed by the contact of the envelope and the framework, so that the envelope is pressed to the lower framework in the travel forward, and the laser beam is always positioned in the middle position of the two roller electrodes during the welding process. The seam formed by the welding method can improve the shear strength more than twice in comparison with the base material, and the air vent amount per area can be reduced from about 10% to about 2% of the laser welding.
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Description

technical field

[0001] The invention relates to a novel composite welding method of laser and resistance seam welding, which belongs to the field of welding. Background technique

[0002] With the increasing awareness of energy conservation and environmental protection in the automotive industry, as well as the requirements of aerospace and military industries for weight reduction and high structural resistance, more and more structural designs use skin-skeleton connections. Compared with riveting and bonding, welding has high production efficiency and high joint strength, and is the most important method for connecting skin skeleton structural parts. However, traditional welding methods such as arc welding and plasma arc welding have large heat input, low welding speed, large welding stress and deformation; and due to the large size of the structure, it is difficult to apply brazing or diffusion welding and other connection methods.

[0003] Laser welding has the advantage...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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