Myriawatt-level laser double-beam welding method for inhibiting welding liquid column and splashing

A welding method and double-beam technology, applied in welding equipment, laser welding equipment, manufacturing tools, etc., can solve problems such as welding spatter

Inactive Publication Date: 2021-07-30
HARBIN WELDING INST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the technical problem that the existing 10,000-watt-level high-power laser is easy to form a large-scale welding liquid column and evolve into welding spat

Method used

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  • Myriawatt-level laser double-beam welding method for inhibiting welding liquid column and splashing
  • Myriawatt-level laser double-beam welding method for inhibiting welding liquid column and splashing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Carry out surfacing welding of Q235 low carbon steel plate, specifically:

[0029] The test base material is Q235 low carbon steel, and the test plate size is 300×300×30mm. The laser used is a YLS-30000 fiber laser, pure argon is used as the shielding gas, and the shielding gas flow rate is 25L / min.

[0030] Double-beam laser welding parameters in the implementation process: two laser beams are obtained after one beam of laser beam is split by an optical lens, such as figure 2 As shown, the front beam laser P 1 The power is 3000W, the rear beam laser P 2 The power of the laser is 20000W, the distance between the two laser beams is 5mm, and the welding speed is 1m / min.

Embodiment 2

[0035] Carry out surfacing welding of stainless steel flat plate, specifically:

[0036] The test base material is 316 stainless steel, and the size of the test plate is 300×300×30mm. The laser used is a YLS-30000 fiber laser, pure argon is used as the shielding gas, and the shielding gas flow rate is 25L / min.

[0037] The parameters of the double-beam laser welding during the implementation process: the front beam laser is an oscillating laser, the oscillating amplitude is 3mm, the oscillating frequency is 100Hz, the power is 3000W, the rear beam laser power is 20000W, the distance between the two laser beams is 10mm, and the welding speed is 1m / min.

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Abstract

The invention discloses a myriawatt-level laser double-beam welding method for inhibiting a welding liquid column and splashing, and belongs to the technical field of laser processing. The technical problem that a large welding liquid column is prone to be formed and is evolved to welding splashing according to an existing myriawatt-level high-power laser in a non-penetration welding mode is solved. According to the method, two double-beam lasers which are arranged front and back in the welding direction and are different in light spot size and laser power are adopted for metal material welding, the rear laser beam is large in power and small in light spot diameter and is used for penetration fusion welding, and the front laser beam is small in power and large in light spot diameter and is used for melting base metal shallow metal to form a front molten pool, which is in Communication with a rear molten pool formed through the rear laser beam, during welding, through the mode that part of metal surges of the rear molten pool are guided to enter the front molten pool, the pressure of liquid metal on the front edge of a keyhole of the rear light beam is reduced, a longitudinal liquid column is prevented from growing and being evolved to splashing, and good surface forming of myriawatt-level high-power laser welding is achieved.

Description

technical field [0001] The invention relates to a 10,000-watt-level laser double-beam welding method for suppressing welding liquid column and splash, and belongs to the technical field of laser processing. Background technique [0002] The 10,000-watt laser welding technology is a new type of advanced welding technology. Using the ultra-high power density of the 10,000-watt laser, a weld with a larger depth-to-width ratio can be obtained, which can effectively reduce the amount of groove processing and narrow the weld bead. The number of layers and the number of cleaning between layers are reduced, so it has outstanding and efficient technical advantages in the welding of medium and thick plates. However, since the energy density of a 10,000-watt-class laser is much higher than that of a kilowatt-class laser, the intense energy interaction inside the keyhole will produce extremely strong ejected substances such as metal vapor. Under the action of these ejected substances, ...

Claims

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Application Information

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IPC IPC(8): B23K26/21B23K26/14B23K26/70
CPCB23K26/21B23K26/14B23K26/702
Inventor 雷振蒋宝孙谦黄瑞生曹浩徐楷昕
Owner HARBIN WELDING INST LTD
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