Laser incident angle determination method for T-joint full penetration laser hybrid welding

Abstract

The invention provides a laser incidence angle determining method for full penetration laser hybrid welding of a T-shaped connector, and relates to the professional technical field of laser welding. The problems that in the implementation process of an existing full penetration T-shaped connector, when the laser incidence angle is designed, a large number of process tests are adopted for the trial-and-error process, so that a large quantity of manpower and material resources are consumed are solved. The method includes the steps that the laser incidence angle is preliminarily calculated, wherein a laser beam comes in from one side of a vertical plate, the axis of the laser beam passes through the focal point position, at the root position of a weld joint, of the vertical plate and a bottomplate, the included angle between the axis of the laser beam and the surface of the bottom plate is the laser incidence angle theta, and the maximum value of the laser incidence angle theta is obtained; the size of a groove is designed, wherein whether the depth of penetration is larger than the distance, passing through the vertical plate, of lasers in the optical axis direction or not is judged, if yes, full penetration welding is achieved through square groove welding; if not, the truncated edge thickness and the groove angle of the groove are determined, and the distance, passing throughthe vertical plate, of the lasers in the optical axis direction is smaller than the depth of penetration of hybrid welding; and the laser incidence angle is obtained. By means of the method, the process design efficiency is improved.

Description

technical field [0001] The invention relates to the professional technical field of laser welding, in particular to a method for determining a laser incident angle for full-penetration laser composite welding of a T-shaped joint. Background technique [0002] T-joint is a common joint type in bogie frame welding. At present, gas metal shielded welding is used for welding. This method has a shallow penetration depth and requires a large groove to achieve full penetration welding. As for frame products, the material is mostly medium-thick plate. When the groove is large, a large amount of metal needs to be filled in the welding process, resulting in problems such as low welding efficiency, many welding layers, and large weld deformation. The above problems can be solved well when laser arc hybrid welding is used, but the laser incident angle needs to be reasonably designed to achieve a fully penetrated T-shaped joint. At present, a large number of process tests are used for tr...

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Problems solved by technology

[0004] In order to solve the problem of a large amount of manpower and material consumption and the like when designing the laser incidence angle in the process of realizing the existing T-shaped joint, the present invention provides a T-shaped joint. Method for Determining Laser Incidence Angle of Full Penetration Laser Hybrid Welding of Joints

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