Laser welding machine: How to ensure welding quality?

June 21, 2024

Laser welding is a high-precision and high-efficiency welding technology that is widely used in the automotive, aerospace, electronics, and


other industries. To ensure welding quality, the following are some common methods and measures.

First, choose a suitable laser welding machine. There are many types of laser welding machines, and it is necessary to select the appropriate


equipment according to the specific welding materials and requirements. Different equipment has different output power, wavelength, and focal


diameter. Choosing the right equipment can guarantee the welding quality to the greatest extent.

Secondly, prepare before welding. The cleanliness of the welding surface has an important influence on the welding quality. Surface


contaminants, oxides, or coatings will affect the absorption and transfer of welding energy, resulting in a decrease in the quality of the weld.


Therefore, before laser welding, the welding surface needs to be thoroughly cleaned, such as mechanical grinding, solvent cleaning, or laser


cleaning, to ensure that the welding surface is clean and flat.

Then, reasonably determine the welding parameters. Welding parameters are the key factors in the laser welding process and directly affect


the morphology and organizational structure of the weld. Common welding parameters include laser power, welding speed, weld size, and


working distance. According to the type and requirements of welding materials, reasonable adjustment and control of these parameters can


ensure welding quality.

In addition, welding quality is guaranteed by introducing welding monitoring and control systems. The welding monitoring system can monitor


parameters such as temperature, speed, energy, etc. in real-time during the welding process, and the welding parameters can be adjusted and


optimized through feedback control to ensure the stability and consistency of welding quality. At the same time, infrared camera technology


can be used to observe the morphology of the weld in real-time, and the weld morphology can be analyzed through image processing


algorithms, thereby providing a basis for quality assessment and quality control.

In addition, maintaining a stable working environment during the welding process is also an important factor in ensuring welding quality. Laser


welding has high requirements for ambient temperature, humidity, and atmosphere. Different materials have different requirements for the


environment. For example, for the welding of aluminum, the welding environment is required to be dry and dust-free to avoid oxidation and


foreign matter. At the same time, environmental factors that are not conducive to welding should be blocked or adjusted, such as preventing


excessive wind speed and preventing beam obstruction.

Regularly maintain and service welding equipment to ensure the stability and reliability of the equipment. For welding equipment that is used


frequently, regular inspection and replacement of key components, such as optical lenses and reflectors, can avoid equipment failures and


affect welding quality.

In summary, ensuring the quality of laser welding requires comprehensive consideration of aspects such as selecting appropriate equipment,


conducting pre-welding preparations, reasonably determining welding parameters, introducing monitoring and control systems, maintaining a


stable working environment, and regularly maintaining and servicing equipment, to ensure the stability and reliability of welding quality.