Fiber laser is a laser that uses optical fiber to amplify and transmit the generated excitation light, and has a wavelength of 1070nm that is easily absorbed by metals. Among many lasers, it has a particularly high energy density and has the characteristics of easy convergence of the beam, and its major advantage is that it can achieve deep melting of metals. Compared with YAG laser, it has many advantages such as deep melting, low running cost, and almost no trouble and cost for adjustment and maintenance, and its popularity has accelerated in recent years. Although fiber laser has the characteristics of high power and high efficiency, if the power is too high in manual welding of sheet metal, it will cause danger to the operator, so the power is usually limited to about 1kW when making products. When pursuing higher power and greater penetration depth, mechanical welding and robot welding can be studied.

Application background Laser oscillating welding technology was born out of the urgent need for welding quality and efficiency in modern manufacturing. Traditional welding technology has deficiencies in precision, strength and complex structure, which has prompted the rapid application of laser welding in various fields. However, it still has defects such as pores and cracks, and has limitations in welding dissimilar materials and complex-shaped parts. It is difficult to meet the stringent requirements of high-end fields such as aerospace and automobile manufacturing, affecting product quality, safety, production efficiency, etc., and increasing the manufacturing cost of enterprises. Against this background, laser oscillating welding technology came into being.

Laser cleaning has become an important cleaning method and is widely used in the manufacturing industry. With the rise of refined production, laser cleaning hardware technology has also undergone multiple upgrades.

Our country is in the process of transformation and upgrading of manufacturing from low-end to high-end manufacturing. Low-end manufacturing accounts for a high proportion. The macro-processing market covers both low-end and part of high-end manufacturing. The market demand is large. Therefore, the market capacity of fiber lasers is relatively large. The domestic low-power fiber lasers are highly localized, and there are many large-scale domestic manufacturers. According to the "China Laser Industry Development Report", low-power fiber lasers have been fully replaced by domestic products; in terms of medium-power continuous fiber lasers, domestic quality has no obvious disadvantages, the price advantage is obvious, and the market share is equivalent; in terms of high-power continuous fiber lasers, domestic brands have achieved partial sales.