Laser-double arc double sided compound welding method of T shaped joint

A hybrid welding and double arc technology, which is applied in laser welding equipment, arc welding equipment, welding equipment, etc., can solve the problems of small fusion diameter of lap joint surface, low weld shear strength and high cost, and increase the area of ​​fusion surface , The effect of improving the energy utilization rate and increasing the welding speed

Inactive Publication Date: 2008-11-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that single laser penetration welding for T-joint welding currently has strict requirements on the assembly gap of the weld seam, and the fusion diameter of the lap joint sur

Method used

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  • Laser-double arc double sided compound welding method of T shaped joint
  • Laser-double arc double sided compound welding method of T shaped joint
  • Laser-double arc double sided compound welding method of T shaped joint

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Specific implementation manner one: the following combination figure 1 , figure 2 To illustrate this embodiment, this embodiment adopts laser and double arc double-sided hybrid welding for the workpiece to be welded in the T-shaped joint. The laser beam 5 is formed along the welding seam formed by the contact between the vertical plate 1 and the top plate 2 of the T-shaped joint from the top plate 2. The top surface is perpendicularly incident for penetration welding, while the first arc welding torch 3 and the second arc welding torch 4 perform simultaneous welding with laser welding from both sides of the weld seam of the T-joint, maintaining the first arc welding torch 3 and the second arc welding torch 4 is placed symmetrically with respect to the vertical plate 1.

[0014] Welding effect comparison:

[0015] Figure 5 ~ Figure 7 The weld morphology of the T-joint workpieces welded by different welding methods are respectively shown. When a single laser is used for pe...

Example Embodiment

[0016] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the type of laser beam 5 is CO 2 Gas laser beam, YAG solid laser beam, semiconductor laser beam or fiber laser beam, and the others are the same as the first embodiment.

Example Embodiment

[0017] Specific embodiment 3: The difference between this embodiment and the first embodiment is that the welding method of the present invention is suitable for the connection of T-joint structures of the same material or different materials, and the others are the same as the first embodiment.

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Abstract

A laser and double-electric-arc double-faced composite welding method for a T-type joint relates to a welding method for laser and electric arc composite welding, and particularly relates to applying the laser and the double-electric-arc double-faced composite welding to a workpiece with a T-type joint to be welded. The invention aims to solve the problems that the single laser penetration welding has strict requirement to the seam fit-up gap and smaller fusion diameter of the faying surface, which results in low shear strength of the seam; and the laser wire filling welding or the double-beam laser synchronous welding process has strict requirement and high cost in the prior T-type joint welding. The laser beams are vertically incident for penetration welding from the top surface of a top plate along the seam formed by the contact of a vertical slab and the top plate of the T-type joint, at the same time, a first electric arc welding gun and a second electric arc welding gun carry out synchronous welding from the two sides of the seam, and the first electric arc welding gun and the second electric arc welding gun are remained to be arranged symmetrically on the left and the right sides of the vertical slab. Compared with the single laser welding, the composite welding method of the invention has the advantages that the capacity usage ratio is improved by more than 30%, the welding speed is increased by more than twice, and the welding efficiency is improved by two to three times.

Description

technical field [0001] The invention relates to a welding method for hybrid welding of laser and electric arc, in particular to welding for T-shaped joints. Background technique [0002] At present, whether it is aerospace vehicles, car bodies, or hulls, they are all pursuing thin-walled new lightweight structures and light metal alloys to achieve weight reduction, reduce material waste, and reduce manufacturing processes. At the same time, the work performance of the new structure needs to be further improved, such as high specific strength, good corrosion resistance, high fatigue life and good compatibility with surrounding components. Therefore, the design of T-joint connection structural parts composed of skin and skeleton has become the mainstream, and many of them are large-scale structural parts. [0003] Considering the reliability, low deformation and flexibility requirements of the connection process, laser welding technology has become the most potential and matu...

Claims

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Application Information

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IPC IPC(8): B23K28/02B23K9/095B23K26/348
Inventor 陈彦宾雷正龙李俐群苗玉刚
Owner HARBIN INST OF TECH
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