Laser CMT composite welding system, welding method and aluminum alloy vehicle body welding component

A hybrid welding and welding method technology, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problem of molten pool gas not escaping pores in time, reducing and other problems, and achieves low cost, good process stability, and low welding The effect of heat input

Inactive Publication Date: 2019-10-01
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a laser CMT composite welding system and welding method to solve the problem that the gas inside the molten pool is too late

Method used

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  • Laser CMT composite welding system, welding method and aluminum alloy vehicle body welding component
  • Laser CMT composite welding system, welding method and aluminum alloy vehicle body welding component

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1

[0040] see figure 1 and figure 2 As shown, Embodiment 1 of the present invention provides a laser-CMT composite welding system, including a welding tooling platform 4, a laser 1, a CMT welding torch 2 and a vibration exciter 7; A welding seam is formed between the workpieces 3 to be welded, a gap is left between the laser 1 and the CMT welding torch 2 and both are located at the welding seam, and the laser generated by the laser 1 is connected to the CMT welding torch. 2. The generated welding arcs act together at the weld and form a molten pool, the exciter 7 is used to provide mechanical vibration, and the vibration generated by it is transmitted to the molten pool to promote the gas in the molten pool. discharge.

[0041] It should be noted that, in this embodiment, the “weld seam” refers to the gap formed between the adjacent workpieces 3 to be welded when they are not welded.

[0042] In this embodiment, the vibration of the exciter 7 is introduced...

Example Embodiment

[0051] Example 2

[0052] like figure 1 and figure 2 As shown, Embodiment 2 of the present invention provides a welding method using a laser CMT hybrid welding system, which may specifically include the following steps:

[0053] Step 1: Before welding, the workpiece 3 to be welded can be wiped with acetone to remove oil stains on the surface, and the surface oxide film can be removed by mechanical grinding with a wire wheel until the metallic luster is exposed, and the treated workpiece 3 to be welded is fixed on the welding tooling platform 4;

[0054] Step 2, fix the vibration exciter 7 on the welding tool platform 4 or the suitable position of the workpiece 3 to be welded, and at the same time stick the acceleration sensor 5 to the position near the vibration exciter 7 through the adhesive, and detect and ensure the vibration exciter 7. For the stability of the system operation, the surface where the acceleration sensor 5 is installed should be smooth and smooth to ensur...

Example Embodiment

[0067] Example 3

[0068] Embodiment 3 of the present invention also provides an aluminum alloy vehicle body welding component, which at least includes a first workpiece and a second workpiece, and the first workpiece and the second workpiece are welded together by the above-mentioned welding method, that is, using The laser-CMT hybrid welding method described above welds the weld formed between the first workpiece and the second workpiece, and welds the first workpiece and the second workpiece into one. It can greatly reduce or even eliminate the pores generated in the welding process, ensure the welding quality of the welded components of the aluminum alloy car body, and improve the structure and performance of the welded joints.

[0069] The embodiments of the present invention are described by taking the application of the laser CMT hybrid welding technology to the body of a high-speed train, especially the aluminum alloy body. , Laser-MIG hybrid welding, laser-TIG hybrid...

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Abstract

The invention relates to the field of laser arc composite welding, and provides a laser CMT composite welding system, a welding method and an aluminum alloy vehicle body welding component. The laser CMT composite welding system comprises a welding tool platform, a laser, a CMT welding gun and a vibration exciter, wherein workpieces to be welded are fixed on the welding tool platform and a weldingseam is formed between the adjacent workpieces to be welded; gaps are reserved between the laser and the CMT welding gun and are arranged at the welding seams; and laser right generated by the laser and welding arc generated by the CMT welding gun jointly act at the welding seams to form a molten pool, and the vibration generated by the vibration exciter is transmitted to the molten pool to discharge gas in the molten pool. According to the system, air holes can be greatly reduced or even eliminated, the structural performance of a welding joint can be improved, and the quality of the weldingjoint can be improved.

Description

technical field [0001] The invention relates to the technical field of laser arc hybrid welding, in particular to a laser CMT hybrid welding system, a welding method and aluminum alloy car body welding components. Background technique [0002] Laser and CMT (Cold Metal Transfer, cold metal transition) hybrid welding can obtain lower welding heat input, faster welding speed, and more Good process stability and higher energy control precision make it easier to meet the high-speed train body, especially the demanding welding requirements of aluminum alloy car body welding components for low deformation and high quality. [0003] However, in the hybrid welding process, no matter how strictly the process measures are controlled, it is still difficult to completely eliminate the pores, especially in high-speed deep penetration welding, where the depth of the molten pool is large and the solidification speed is fast, and the gas inside the molten pool is too late It escapes and is...

Claims

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Application Information

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IPC IPC(8): B23K26/348B23K26/70
CPCB23K26/348B23K26/70
Inventor 韩晓辉马寅杨志斌李帅贞
Owner CRRC QINGDAO SIFANG CO LTD
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