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A method and system for high-power laser welding of magnesium alloy thick plates

A laser welding and laser welding head technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problem of unstable welding process, and achieve the effect of improving assembly clearance and good engineering adaptability

Active Publication Date: 2022-06-07
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0010] Aiming at the problem that the plasma / metal vapor plume generated during high-power laser deep-penetration welding of magnesium alloy thick plates shields the incident laser and causes instability in the welding process, the invention provides a method and method for high-power laser welding of magnesium alloy thick plates system, with good welding effect

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  • A method and system for high-power laser welding of magnesium alloy thick plates
  • A method and system for high-power laser welding of magnesium alloy thick plates
  • A method and system for high-power laser welding of magnesium alloy thick plates

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Embodiment Construction

[0047] The following will be combined Figure 1-4 and specific embodiments to elaborate on the technical solution of the present invention.

[0048] as Figure 1 -4, as shown in an embodiment of the present invention, a high-power laser thick plate welding method comprises the following steps.

[0049] Step 1, provide the first workpiece 1 and the second workpiece 2 that need to be deeply melted, and the first workpiece 1 and the second workpiece 2 are magnesium alloy plates, which can be prepared by mechanical processing methods. In the present embodiment, the thickness of the first workpiece 1 and the second workpiece 2 is 12 to 20mm.

[0050] Step 2, remove the impurities on the upper and lower surfaces of the first workpiece 1 and the second workpiece 2, and accurately dock and clamp the first workpiece 1 and the second workpiece 1, so that the first workpiece 1 and the second workpiece 2 are closely fitted, that is, the gap between the butt plates is zero.

[0051] Step 3, to p...

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Abstract

The invention discloses a method for high-power laser welding magnesium alloy thick plates, which comprises the following steps: step 1, providing a first workpiece and a second workpiece to be welded; step 2, docking and clamping the workpieces; step 3, providing three Beam laser welding system, the laser head is fixed at the end of the manipulator; step 4, start the laser welding system, the laser beam of the first laser head irradiates the butt surface of the workpiece vertically, and the second and third laser heads obliquely irradiate both sides of the weld. Step 5. Turn on the plasma detector to detect the size of the plasma and feed it back to the power regulator. Step 6. The manipulator holds the three laser heads and moves forward synchronously with the plasma detector. Step 7. When the manipulator moves to the end of the welding seam, the welding process is completed. The invention also discloses a system for welding magnesium alloy thick plates with high power laser. Compared with the prior art, the invention can effectively solve the shielding problem of the incident laser caused by plasma generated by high-power deep penetration welding.

Description

Technical field [0001] The present invention relates to a field of laser welding, in particular to a high-power laser welding magnesium alloy thick plate method and system. Background [0002] Laser welding has the advantages of non-contact, high efficiency and small thermal deformation, and has been widely used in automotive, mold, electronics and other industries. With the continuous development of laser technology, the maximum power that laser equipment applied in the field of laser welding can be continuously improved, and in recent years it has reached the level of 10,000 watts; In the ultra-high power laser welding process, due to the extremely high energy density brought by the extremely high power, the welded material is severely evaporated, resulting in different characteristics from conventional laser welding with a power of less than 10,000 watts. Examples include the extremely large photoreogenic plasma / metal vapor plume that occurs during welding, and the presence of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/26B23K26/067B23K26/03
CPCB23K26/26B23K26/0673B23K26/032
Inventor 李康为张明军李河清张焱毛聪
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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