The difference between laser welding machine and ultrasonic welding machine

In the precision equipment manufacturing industry, laser welding machines and ultrasonic welding machines are both common equipment. Many companies do not know which equipment to choose when purchasing welding equipment. Today, the editor will specifically talk about the difference between laser welding machines and ultrasonic welding machines.

In fact, both laser welding and ultrasonic welding have their own characteristics. First, let's take a look at their special processes. This article introduces a laser welding machine, which uses high-energy laser pulses to locally heat in a small area, and transmits heat conduction to the inside of the material to melt the material and form a specific molten pool. Ultrasonic welding uses high-density energy generated by high-frequency ultrasonic mechanical vibration to produce plastic deformation on the surface of the workpiece, destroy the welding layer under pressure, and make the solder physically connected at room temperature. The thermal conductivity is relatively good, and there are certain advantages in material cost.

Laser welding is a non-contact welding method. Its advantages are that the workpiece does not need to be subjected to pressure, the overall deformation of the workpiece is small, and the micro deformation of the surface of the heat-absorbing coating is also small. Laser welding is suitable for thicker materials, such as the thickness of aluminum plates is generally 0.4mm, which leads to higher material costs.

Ultrasonic welding is a process that uses high-frequency ultrasonic mechanical vibration to generate high-density energy on the surface of the workpiece. Under the action of force, the surface of the weldment undergoes plastic deformation, thereby achieving physical connection of the weldment. It is suitable for ultrasonic welding of thin products. The mainstream flat copper plate in the world is usually between 0.12mm-0.2mm. In order to consider the material cost, some companies now choose aluminum plates, and ultrasonic welding chooses 0.2-0.3mmmm.

Generally speaking, the two welding technologies have their own characteristics. Enterprises should choose more suitable welding equipment according to their actual situation, and cannot use two welding processes in general. Ultrasonic welders are suitable for welding thin products, and are suitable for thick products. Second, there is another important aspect. The price of laser welding machines is generally higher than that of ultrasonic welding machines.