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A ZL114A, dissimilar aluminum alloy technology, applied in laser welding equipment, welding equipment, welding/welding/cutting items, etc., can solve problems such as pits and air holes weld defects, weld undercuts, etc., and achieve good performance results
Active Publication Date: 2021-10-15
BEIJING HANGXING MACHINERY MFG CO LTD
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[0004] Due to the difference in physical and chemical properties between the 5A06 aluminum alloy and the ZL114A aluminum alloy, when the welding depth of the 5A06 aluminum alloy and the ZL114A aluminum alloy is 3 to 5 mm, there is still undercut, Pit and Porosity Weld Defects
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Embodiment example 1
[0045] This embodiment provides a 4mm thick 5A06 aluminum alloy plate and a 4mm thick ZL114A aluminum alloy plate butt joint laser swing welding method, which specifically includes:
[0046] (1) Before laser welding, clean the scale, oil and other impurities within 20mm from the center of the weld, place the 5A06 aluminum alloy plate and the ZL114A aluminum alloy plate directly on the workbench, and fix them with a pressure plate;
[0047] (2) The seams of the two are welded by the oscillating laser welding process. During oscillating welding, the laser power P is 4500W, the laser beam is vertically incident, the welding speed ν is 1800mm / min, the spot diameter D is 0.3mm, and the defocusing amount l is 0mm, the swing frequency f is 300Hz, the swing amplitude h is 3mm, and the swing mode adopts "8" mode; high-purity argon gas with a mass concentration of 99.9% is used for front and back protection, the front gas flow is 16L / min, and the back gas flow 4L / min;
[0048] (3) Afte...
Embodiment example 2
[0051] This embodiment provides a 5mm thick 5A06 aluminum alloy plate and a 5mm thick ZL114A aluminum alloy plate butt joint laser swing welding method, which specifically includes:
[0052] (1) Before laser welding, clean the scale, oil and other impurities within 20mm from the center of the weld, place the 5A06 aluminum alloy plate and the ZL114A aluminum alloy plate on the workbench, and fix them with a pressure plate;
[0053] (2) The seams of the two are welded by the oscillating laser welding process. During oscillating welding, the laser power P is 4800W, the laser beam is vertically incident, the welding speed ν is 1800mm / min, the spot diameter D is 0.3mm, and the defocusing amount l is 0mm, the swing frequency f is 300Hz, the swing amplitude h is 2mm, and the swing mode adopts "O" mode; high-purity argon gas with a mass concentration of 99.99% is used for front and back protection, the front gas flow is 17L / min, and the back gas flow 4L / min;
[0054] (3) After the we...
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Abstract
The invention provides a laser swing welding method for the butt joint of 5A06 / ZL114A dissimilar aluminum alloy parts, which belongs to the field of welding technology. The method comprises: placing 5A06 aluminum alloy parts and ZL114A aluminum alloy parts butt joints to form a structure to be welded, the welding depth of the structure to be welded is 3 to 5 mm; welding the structure to be welded by laser swing welding to obtain an initial welding When welding, the incident angle of the laser beam is 90°, the laser power is 4500‑5000W, the welding speed is 1500~1800mm / min, the spot diameter is 0.2~0.3mm, the defocus is ‑1~1mm, and the swing frequency is 100 ~300Hz, the swing amplitude is 1-3mm; laser swing welding is performed on the initial welding piece again to obtain the final product. When welding, the incident angle of the laser beam is 80-85°, the laser power is 1000‑2000W, and the welding speed is 2000~2200mm / min, the spot diameter is 0.1~0.2mm, the defocus is 3~6mm, the swing frequency is 200~300Hz, and the swing amplitude is 2.5~3mm. The weld seam obtained by this method has no undercut, pits, bumps, surface or near-surface pores, and the internal quality meets the strict B-level requirements of the GB / T 22085.2-2008 standard, without internal cracks and pores.
Description
technical field [0001] The invention relates to the field of welding technology, and in particular provides a laser swing welding method for the butt joint of 5A06 / ZL114A dissimilar aluminum alloy thin-walled parts. Background technique [0002] With the application and development of aerospace technology, the application of aluminum alloys in this field is becoming more and more extensive. Aluminum alloy materials can effectively reduce product weight and improve product performance. Laser welding energy is highly concentrated, which can significantly increase welding speed and achieve high-precision, low-distortion welding characteristics. Aluminum alloy laser welding can greatly increase the processing speed and reduce post-weld deformation, which has obvious advantages compared with traditional joining methods. However, the stability of the welding process of aluminum alloy laser welding is poor, and the plasma fluctuation is large, which is easy to form forming defect...
Claims
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