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Precautions for laser welding machine when welding various metal materials

Apr 20,2023 | TOPTEK

In recent years, the application range of stainless steel plate has become wider and wider, widely used in mold repair, spot welding of hardware handicrafts, electronic components, stainless steel bathroom kitchen utensils, faucets, mobile phone shell studs, stainless steel elbow joints, clocks, precision machinery products, etc. . Therefore, the packaging and welding of ultra-thin stainless steel products is very important. The traditional welding method is difficult to guarantee the welding quality of the plate. Laser welding has incomparable advantages over traditional welding, and can effectively reduce welding defects. In the laser welding industry, there are many laser welding manufacturers for stainless steel workpieces, and the welding effect of laser welding machines is also very good. Laser welding is also a good choice for 304 stainless steel.

As a kind of austenitic stainless steel, 304 stainless steel is a general stainless steel material with the characteristics of corrosion resistance, heat resistance and non-magnetic properties. Corrosion resistance is stronger than 200 series stainless steel. Good high temperature resistance, good weldability, low sensitivity to welding cold cracks and hot cracks, good hot workability such as stamping and bending, no heat, can be as high as 1000-1200 degrees.

Welding stainless steel sheets has always been a troublesome process. The thermal effect of traditional cold welding or secondary protection welding is too large, which is easy to cause burn-through and deformation; welding used by many customers can solve the problem, but it is easy to cause defects such as traces on the surface of the workpiece and unsightly appearance; the emergence of stainless steel sheet laser welding machines, workers The automation of the entire welding process can be realized only by loading and unloading, which completely solves defects such as welding deformation, blackening, burn-through, and weld marks during the welding process. Formed in one go. After production, it was shown that the laser welding of stainless steel plates can well meet the process requirements and does not affect the subsequent steamer bending process. It not only realizes welding automation, improves welding efficiency and yield, but also reduces customers' production costs.

Many customers ask how thick the 304 stainless steel plate can be welded by the laser welding machine?
The welding thickness mainly depends on the power of the stainless steel welding machine laser. Jikang self-developed dissimilar metal laser precision spot welding machine, the welding seam is firm and beautiful, the heat affected zone is small, the welding seam is flat and free of pores, the welding strength and toughness are at least equivalent to the base metal, and the welding speed is fast. The traditional fixed optical path and welding and machine head Compared with the welding method, the efficiency is increased by more than 10 times, and it has great advantages in the field of small plane orbital welding.

Is laser welding related to sheet thickness?
The depth of laser welding is related to the properties of the material, including the thickness of the material. It is absolutely impossible to choose the same parameters for the welding of carbon steel and titanium.
The problem of how thick the laser welding machine can weld is mainly steel plates with different thicknesses of 1mm, 2mm, 3mm, 4mm, and 5mm and welding machines with different powers of 200W, 300w, 600w, and 1000w.
YAG laser welding machine: 3mm inner wall welding effect is good.
300w laser welding machine: the thickness of the stitch welding shall not exceed 1.5mm. Of course, sometimes the parameter setting is slightly thicker and can be welded. Penetration strength and heat distortion are generally unacceptable.
600w laser welding machine: It can meet the needs of kitchen, household appliances, high-speed stainless steel laser welding processing 1.5mm steel plate thickness and 1mm penetration depth.

1000W laser welding machine: 2mm thick stainless steel plate, requires deep penetration, the thinner the weld, the better. It is recommended to use 1000W fiber laser welding, the speed can reach 1m/min or 500W, but the speed is slower.

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