A processing method that can improve the strength of laser welding

Abstract

The invention discloses a processing method capable of improving the strength of laser welding, which includes welded part weldments, workpiece weldments and support bodies, because the intersecting welds between the part weldments, support bodies and workpiece weldments form gap spaces, The interstitial space accommodates a welded combination formed by solidification of molten metal in the molten pool during welding for improving welding strength. The welded combination includes a molten pool part, a welded wide part and a welded thin waist part. During welding, the welded parts to be welded and the welded parts of the workpiece are welded and fixed together through the molten pool part, the welded thin waist part and the welded width part in the welding combination, which avoids the welding of thin-walled materials in the prior art due to the formation of only the molten pool The deformation or breakdown of the welded parts caused by the penetration or penetration of the molten pool or the penetration of the molten pool is beneficial to improve the welding strength of the welded parts, and at the same time avoid affecting the quality of the welded parts. Therefore, to improve the appearance welding quality.

Description

[0001] 【Technical field】 [0002] The invention relates to a processing method for laser welding that can improve the strength of laser welding. [0003] 【Background technique】 [0004] Please refer to Figure 1 to Figure 4 As shown, the existing laser welding method is as follows: firstly, the two workpieces to be welded are stacked and closely attached together, and then welded together from one side of the two workpieces to be welded, and then welded together from the other side of the two workpieces. Welding together, so that the workpieces are welded together, and obtain a certain welding strength. During welding, due to the small spot at the laser focus, the volume of the joint produced during welding is small, and brittle crystal phases are easily produced, so that the welding strength is often insufficient. For this reason, the solution of increasing the welded points or repeated or continuous welding is generally realized by adjusting the positional relationship of th...

AI Technical Summary

Problems solved by technology

However, this welding processing method is relatively thin-walled materials such as thin plates or sheets or compact small workpieces or workpieces with limited welding positions or appearance requirements. When welding thin-walled materials, since there is no gap between the parts and the workpiece, when the laser power When the density increases until the molten pool penetrates, the molten metal in the molten pool collapses and leaks under the action of metal vapor pressure and gravity, the residual molten metal becomes cylindrical, the heat capacity becomes smaller, cooling and solidification is rapid, and embrittlement is easy to occur , The welding strength is reduced, and the surface of the part is also damaged at this time, so it is easy to form only the molten pool penetration phenomenon or the molten pool penetration phenomenon or the molten pool penetration phenomenon at the welded part of the two workpieces, making it easy to strike It is easy to deform through the workpiece to be welded or the intersection of the welded workpieces, resulting in relatively low welding strength of the welded parts

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