Welding process of high-power laser welding equipment for sheets

Abstract

The invention provides a welding process of high-power laser welding equipment for sheets. The welding process includes the specific steps that the sheets are taken, welding surfaces are polished through abrasive paper, and the to-be-welded surfaces are polished into smooth flat surfaces; the to-be-welded surfaces of the sheets are subjected to oil and dirt removal, and the to-be-welded surfaces are kept clean; a special clamp is used for clamping the to-be-welded sheets, and the two stainless steel sheets are spliced in parallel; tack welding is carried out, in other words, points are fixed to the two ends and the middle of a weld joint separately, and the shapes and the sizes of the sheets are fixed to certain positions of a welding line; welding parameters of a laser welding machine areadjusted, and laser backing welding is carried out; a welding track is split into multiple sub welding sections, the sub welding sections are identified in sequence, multiple welding points are preset in each sub welding section, and the welding points are identified in sequence; and the welding parameters of the laser welding machine are adjusted, and formal welding operation is carried out. Thesheet welding process is simplified, the operation is easy, the welding efficiency is high, the sheets can be welded, and the welding effect is extremely good.

Description

technical field [0001] The invention relates to the field of thin plate welding, in particular to a high-power laser welding equipment welding process for thin plates. Background technique [0002] Laser welding has the advantages of good forming quality, small heat-affected zone, small workpiece deformation, less subsequent processing, and high flexibility. It is very suitable for welding and forming of metal sheets. Laser welding can be roughly divided into laser welding according to the heat conduction mechanism of welding. There are two types of heat conduction welding and laser deep penetration welding; when the laser heat input exceeds a certain threshold, the welding mode changes from heat conduction welding to deep penetration welding with "small hole effect", so as to realize full penetration welding of metal sheets. Under the condition of full penetration of laser deep penetration welding of thin metal plates, when the laser heat input is low, the welding shape of ...

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Problems solved by technology

[0002] Laser welding has the advantages of good forming quality, small heat-affected zone, small workpiece deformation, less subsequent processing, and high flexibility. It is very suitable for welding and forming of metal sheets. Laser welding can be roughly divided into laser welding according to the heat conduction mechanism of welding. There are two types of heat conduction welding and laser deep penetration welding; when the laser heat input exceeds a certain threshold, the welding mode changes from heat conduction welding to deep penetration welding with "small hole effect", so as to realize full penetration welding of metal sheets. Under the condition of full penetration of laser deep penetration welding of thin metal plates, when the laser heat input is low, the welding shape of the thin plate is nailhead shape, that is, the front weld seam of the thin plate directly affected by the laser is wider and the back weld seam is narrower; When the heat input is large enough, there will be an hourglass-shaped weld with one-sided welding and double-sided forming, that is, the width of the weld on the front and back of the thin plate is roughly the same, and the hourglass-shaped weld has better mechanical properties than the nail-head weld. ; However, the existing thin plate welding process is relatively complicated, and high-power laser welding is difficult to weld thin plates, and the welding efficiency and welding effect need to be improved

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