How does laser welding machine work?

All materials that can be welded by conventional methods can also be welded by the laser welding machine. In terms of quality, speed and economy, laser welding systems are superior to traditional processes in industrial projects, making laser welding machines and services popular. According to the different laser radiation intensity, laser welding can be divided into heat conduction welding and deep penetration welding.This article is all about the working process of the laser welding machine.

The following knowledge points are listed below:

The working process of the laser welding machine

The components of the laser welding machine

The speed of the laser welding machine

The temperature of the laser welding machine

1. The working process of the laser welding machine

Laser welding is basically very simple: two precisely cut sheets are glued together. The laser melts the edges of the metal sheet. The melt flows into each other and the joint is complete.

There are two types of laser welding: heat conduction welding and deep nenetration welding.

Using thermal conduction welding, only the surface of the workpiece is hot-melted. During laser welding, energy only enters the workpiece through thermal conduction. The welding depth of this process is generally less than 2mm. The laser beam melts the material connected along the joint. The melts flow to each other, and the solidified melts permanently connect the materials together. Heat conduction welding is mainly used for the connection of thin-walled parts. Once the laser beam welding process is complete, the smooth circular welds do not require further processing.

With deep welding, energy is also applied below the workpiece surface. It is used when a higher welding depth is needed or when different layers of materials need to be welded at the same time.

2. The components of the laser welding machine

The laser welding system is composed of laser optics, electric guide rails and necessary worktables. In any case, the semi-finished product to be welded must be clamped to ensure a precise connection. Therefore, there is a difference between a mobile laser welding machine and a fixed laser welding machine . In the case of a mobile laser beam laser welding machine, the device is close to the product. The fixed laser welding machine has a working table and a clamping device. The insertion and clamping of fixed laser welding systems are either electric or automatic. However, the size of the worktable limits the size of the product to be processed. The control system is the most important part of the laser welding system, in addition to the precision servo system for welding optics and robotic arms. It guides the arm to a predetermined point and adjusts the duration and intensity of the laser beam.

The ideal complement to the laser welding system is the laser cutting system. Precise laser cutting shapes provide precise geometric shapes, and laser welding machines can be used to produce the best possible results.

3. The speed of the laser welding machine

In addition to accuracy and low heat input, working speed is also one of the outstanding properties of laser welding machine. Under ideal conditions, a long straight circular weld can be welded at a speed of up to 60 m / min. Since the intensity of the laser beam can be changed, the influence of the use of materials on the working speed of the laser welding machine is not very obvious. Even thick plates can be accurately connected in seconds.

4. The temperature of the laser welding machine

To weld a material, it must reach a temperature above its melting point. In the traditional welding process, the melting temperature of the material is a limiting factor: not every material can be processed with every welding process. Only electric welding can produce a certain range of spot heat intensity on its electrodes. Laser welding is different: in all welding processes, it provides maximum flexibility in welding temperature. An overview of commonly used materials and their melting points, and the range of laser weldable materials:

Plastic: 150 to 350 ° C

Aluminum: 600 ° C

Glass: 600 to 800 ° C

Copper: 1085 ° C

Steel: 1400 ° C

In practical applications, laser welding can achieve higher temperatures. However, this spectrum clearly shows how fickle the connection process is.

So now you know the working process of laser welding machine? We also provide CO2 laser marking machine, UV laser marking machine.