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Beam shaping based hidden added material type laser butt welding method

A beam shaping and butt welding technology, used in laser welding equipment, welding equipment, edge parts of workpieces, etc.

Active Publication Date: 2018-01-05
深圳市天策激光科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no good way to ensure the welding quality for occasions with special requirements for welded joints, such as dissimilar material welding and ultra-high-strength material welding.

Method used

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  • Beam shaping based hidden added material type laser butt welding method
  • Beam shaping based hidden added material type laser butt welding method
  • Beam shaping based hidden added material type laser butt welding method

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] The invention provides a laser butt welding method based on beam shaping, which includes the following steps:

[0023] (1) Clamping the workpiece, setting a welding filling cutout along the welding path at the butt welding joints of the two plate workpieces to be welded, and inserting the welding filling into the welding filling cutout to form a welding with built-in filling structure (such as figure 1 shown), set the relative orientation of the laser welding head and the workpiece, so that the double-circle compound shaping beam output by the laser welding head is vertically incident on the butt welding joint of the workpiece and focused on the surface, and the welding material is located in the double-circle compound Below the inner circular laser irradiation area in the shaping beam;

[0024] The cross-sectional shape of the...

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Abstract

The invention provides a beam shaping based hidden added material type laser butt welding method. The method comprises the steps that (1) workpieces are clamped, a welding added material is embedded to the portion of a butt welding joint of the two to-be-welded plate workpieces, the relative directions of a laser welding joint and the workpieces are set, a dual circular ring composite shaping beamoutput by the laser welding joint is vertically incident to the portion of the butt welding joint of the workpieces and is focused to the surface; and (2) lasers are started to output the dual circular ring composite shaping beam, the dual circular ring composite shaping beam is controlled to advance in the welding seam direction, the welding seam area is subjected to overlapping scanning three times successively through an outer circular ring Bessel laser beam, an inner circle Gaussian laser beam and an outer circular ring Bessel laser beam, and finally a welding joint containing enriched added material metal is formed through solidification. According to the method, added materials of different materials and components can be selected for different kinds of plate base metal according tothe needs of application occasions, welding joints of various special properties can be achieved, a good welding seam structure can be obtained easily, and the welding joint property can be improved.

Description

technical field [0001] The invention belongs to the field of laser processing, and in particular relates to a laser butt welding method based on beam shaping with hidden material addition. Background technique [0002] The purpose of laser welding is to generate a liquid molten pool through laser radiation and the absorption of laser energy by the welded material, and make it grow to an ideal size, and then move the molten pool along the solid-liquid interface to eliminate the initial gap between the welded components. Creates high-quality welds. Laser welding is to radiate a high-intensity laser beam to the metal surface. Through the interaction between the laser and the metal, the metal absorbs the laser and converts it into heat energy to melt the metal and then cool and crystallize to form a weld. There are two principles of laser welding machine: the first is heat conduction welding. When the laser is irradiated on the surface of the material, a part of the laser is re...

Claims

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Application Information

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IPC IPC(8): B23K26/26B23K26/064B23K26/067B23K33/00
Inventor 曹宇孙轲孙兵涛刘文文朱德华张健徐文俊
Owner 深圳市天策激光科技有限公司
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