Is it better to choose a laser welding machine with higher power? 

Many people think that for a laser welding machine, the higher the power, the faster the welding speed is the best, but this is not the case, because the power and welding speed of the laser welding machine will have a direct impact on the welding penetration and width, thus affecting the welding. quality. Therefore, the speed and power of the laser welding machine for different materials should be determined according to the specific product, and it is better for the product. Today we will learn about the influence of the speed and power of the laser welding machine on the welding quality.

When the laser welding machine performs welding work, the main function is the laser power density value. Different materials have a critical power density threshold. In order to weld, the power must exceed this critical threshold, so that the material can be melted and the welding effect can be achieved. When the laser power is constant, the welding speed becomes the main factor affecting the welding strength, and the suitable laser welding speed is the guarantee of the welding firmness.

For high-power laser welding machines, it is easy to burn the alloying elements in the weld area, which reduces the strength and mechanical properties of the weld, and also because the high-power welding machine deteriorates the weld formation and increases the number of surface holes. Excessive welding speed will reduce the strength of the weld, which is due to the increase of pores in the weld and the reduction of the effective bearing area.

The welding speed together with the laser power affects the welding depth. At a certain speed, the weld strength has a critical region. When the power is lower than its lower limit, the strength increases with the increase of the power, because with the increase of the power, the penetration increases and the bond strength also increases;

When the power is greater than the upper limit of the critical region, the intensity decreases as the power increases.

The working principle of the TRIUMPH laser welding machine is to heat the surface of the workpiece by laser radiation, and the surface heat diffuses to the inside through heat conduction. By controlling the parameters such as the width, energy, peak power and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool. But sometimes the light energy is not completely converted into metal melting, but manifested in other forms, such as vaporization, plasma formation, etc.

Therefore, the ability to control the light energy conversion rate has become the key to the technology, rather than blindly increasing the power of the fiber laser welding machine to make up for this deficiency.

When the welding speed of TRIUMPH laser welding machine is constant, the laser power should also be kept constant. However, it is also possible to increase the laser power and speed up the welding speed, which can improve the efficiency and ensure that the weld just penetrates.

This is Yolanda from triumphlaser If you want to learn more about laser welding machine, please don’t hesitate to contact with me.

Email:sales1@triumphlaser.com