Narrow gap three-beam laser welding method

A laser welding, narrow gap technology, applied in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problems of poor metal droplet transition stability of welding wire, and achieve the effect of improving welding quality, transition stability and easy realization

Active Publication Date: 2011-05-18
HARBIN INST OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a narrow gap three-beam laser welding method in order to solve the pr

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  • Narrow gap three-beam laser welding method
  • Narrow gap three-beam laser welding method
  • Narrow gap three-beam laser welding method

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specific Embodiment approach 1

[0010] Specific implementation mode one: the following combination Figure 1 to Figure 3 Describe this embodiment, in this embodiment, during the welding process, the main beam emitted by the laser is divided into three welding beams, the energy of the three welding beams is respectively one-third of the energy of the main beam, and the three welding beams The three focused light spots formed in the groove of the narrow gap weld are arranged in parallel or in an equilateral triangle.

[0011] This embodiment is a laser wire-filling welding method, which solves the problems of air holes, unfused side walls, unfused interlayers, and unstable metal droplet transition of welding wire during narrow-gap laser wire-filled welding. There are deficiencies in laser welding technology.

specific Embodiment approach 2

[0012] Specific implementation mode two: the following combination Figure 1 to Figure 3 Describe this embodiment, this embodiment is a further description of Embodiment 1, the implementation method of dividing the main beam emitted by the laser into three welding beams is as follows:

[0013] After the main beam passes through the first beam splitter 1-1, it is divided into the first transmitted beam and the first reflected beam. The first reflected beam is focused by the first reflective focusing mirror 2-1 to form the first welding beam. The first The focused spot formed by the welding beam is on one side of the narrow gap weld groove,

[0014] The first transmitted beam passes through the second beam splitter 1-2 and is divided into the second transmitted beam and the second reflected beam, and the second transmitted beam passes through the transmissive focusing lens 3 to form a second welding beam, and the second welding beam forms The focused spot is in the center of th...

specific Embodiment approach 3

[0018] Embodiment 3: This embodiment is a further description of Embodiment 2. The transmitted beam of the first beam splitter 1-1 accounts for two-thirds of the total energy of the incident beam. The first beam splitter 1-1 The reflected beam accounts for one-third of the total energy of the incident beam.

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Abstract

The invention discloses a narrow gap three-beam laser welding method, and belongs to the technical field of laser processing. The method solves the problem of poor transition stability of welding wire metal molten drops in the conventional swinging or rotating double-beam welding method. In the welding process of the method, a main beam emitted by a laser device is split into three welding beams, the energy of the three welding beams is one third of the energy of the main beam respectively, and three focusing light spots of the three welding beams in a narrow gap weld groove are arranged in parallel or in a regular triangle. The method is suitable for narrow gap laser welding.

Description

technical field [0001] The invention relates to a narrow-gap three-beam laser welding method, which belongs to the technical field of laser processing. Background technique [0002] In the existing narrow-gap laser wire-filling welding methods, single-beam welding, double-beam welding, swing or rotating double-beam welding are mostly used. The disadvantage of single-beam welding is that the diameter of the laser spot is small, the heat action area is small, and side walls are prone to appear. Insufficient fusion phenomenon affects welding quality. When double-beam welding is used, although the heat action area of ​​welding is improved, the two beams act on both sides of the weld pool, and there is no laser beam in the center of the molten pool, which will cause insufficient stirring in the center of the molten pool and easily generate pores. The filler wire is generally located in the center of the weld, and the laser beams on both sides cannot provide sufficient heat to me...

Claims

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Application Information

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IPC IPC(8): B23K26/20B23K26/067B23K26/24
Inventor 李俐群雷正龙冯杰才陶汪
Owner HARBIN INST OF TECH
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