How does laser welding make perfect car taillights?

Under the influence of the new era, appearance has become an important productivity in any industry, and any field cannot do without appearance. With the rapid development of the automobile industry, the role of taillights in automobile structure is becoming more and more important.

The taillights of cars are no longer just to meet basic lighting needs. Instead, they are beginning to pay more attention to the design, appearance and recognition of the lights themselves, which is also an important part of realizing brand value. In recent years, car buyers have not only considered the performance of the car itself, but also gradually considered the overall design of the car's taillights.

So how to make a perfect taillight?

Automotive laser welding machine: A pioneer in the lamp welding industry, hot plate welding is an early development of the plastic welding industry. The welding method is simple, but with the development of society, it cannot meet the current market demand. The emergence of laser welding machines has attracted the attention of large companies.

The feasibility of laser welding is closely related to the optical properties of the material itself. What other issues should be paid attention to in the implementation of laser welding technology?

First, we also need to pay attention to the following from the perspective of materials:

1. The different compatibility and melting temperature difference between the two polymers will directly affect the laser welding strength. Conversely, the simpler the laser welding process, the higher the welding strength is. The direct welding strength of the same material is also the highest.

2. Volume expansion is the conversion of laser energy into heat energy by the absorbing layer polymer. Therefore, a certain clamping force should be applied to the upper and lower layers through the fixture to avoid deformation of the welding interface due to expansion. In addition, the clamping force ensures better heat transfer between the two layers, ensuring that both polymer layers melt at the same time, resulting in a higher weld strength.

In addition, when using the laser welding process, if the laser power is too large or the welding time is too long, it is easy to cause excessive melting of the material and degradation. To achieve the ideal welding quality, the appropriate laser power should be selected. And the scanning speed of the welding time.

Laser welding is not only suitable for a variety of different polymers, but also different from the traditional plastic welding process, laser radiation can weld two polymers. Flexible welding. High welding strength characteristics. Plastic laser welding puts forward special requirements on the selectivity and passing of material characteristics. In order to obtain a satisfactory position, it is necessary not only to adjust the welding process parameters, but also the appropriate material selection is essential!

Laser welding is smooth. Flexible welding. High strength. Advantages such as fast welding speed have become the potential stock of lamp welding. With the development of laser technology and the reduction of equipment costs, laser welding is becoming the mainstream process of lamp welding. Laser welding uses a high-energy-density laser beam as a heat source, heats the surface of the workpiece with laser radiation, transfers the surface heat to the inside through heat conduction, melts the workpiece, and forms a specific molten pool. Therefore, in order to achieve a good welding effect, the energy of the laser beam must be absorbed.

Therefore, the plastic must have special optical properties, the upper layer should ensure the passage of near-infrared lasers, and the lower layer should ensure near-infrared absorption. So, what are the optical properties of the plastic itself? In terms of polymer form, amorphous polymers only absorb a small amount of incident light and obtain a higher penetration depth.