How to Choose Laser Welder Power Parameters Based on Material Thickness

The thickness of the material is the core factor in choosing an appropriate laser welding machine.By analyzing material characteristics, consulting power-thickness tables, and conducting practical tests to optimize parameters, they can precisely match the power needs of the device.Thin sheets should be welded at low power and high frequency to avoid distortion, while thicker sheets require higher power and greater attention to penetration.Reasonable adjustment of parameters can effectively improve the quality of the weld, and prevent the waste of energy and damage to materials.

Why does the thickness of the material determine the choice of power?

The laser power parameters and the thickness of the material to be welded have a relationship like that between a key and a lock.The thicker the material, the more energy is required, and the power must be turned up accordingly.But blindly raising power not only wastes energy, it also risks burning through the material.For instance, a 500-watt laser is sufficient to weld 1 mm of stainless steel, but if you switch to 3 mm of stainless steel, you might need to jump to 1500 watts or more.Only by getting a feel for this pattern can the welding be both strong and beautiful.

That's all it takes to adjust the power parameters.

1. Determine the type and thickness of the material.

Different materials have very different absorption rates and thermal conductivity.For example, aluminum is a good heat conductor, so it requires more laser energy. Stainless steel, on the other hand, is easier to control.First, measure the thickness with a vernier caliper, then check the material parameters table provided by the manufacturer, and you'll have a basic idea.

Step 2: Refer to the thickness-power conversion table.

Most laser welding machine manufacturers provide a reference range for power and thickness.For example, for 0.5-1 mm carbon steel, we recommend a power range of 300-800W, with the pulse frequency set at 20-50Hz.But don't blindly copy these settings. It is recommended that you begin with a low power setting when you actually weld, and then gradually increase it.

Step three: Field testing and optimization.

First, he found some scrap pieces to test his welding.He also checks for air bubbles or over-burning.If the welded seam turns black, it may be that the power is too high; if the connection is not firm, it may be necessary to appropriately increase the power or extend the operating time.Don't be afraid of the hassle. You have to try a few times before you'll find the "sweet spot.

Some tricks to avoid common pitfalls.

When welding thin plates (less than 0.3mm thick), it is easy for the workpiece to deform, so it is advisable to use low power with high frequency, such as 200W at 100Hz, to reduce the heat affected zone.When welding thick plates, you need to be concerned about penetration, so you can appropriately lower the frequency to concentrate the energy.In addition, be sure to check the flow of the protective gas. If the flow is too great, it will interfere with the molten pool, resulting in uneven welding.