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Characteristics of New Processes of Laser Welding Equipment and Development Trends of Industry Application Effects

2018-08-07

From the name, it is clear that laser welding processing equipment is mainly used in welding production. It can connect different materials or the same materials through laser, allowing them to merge by raising the temperature of the materials themselves through the energy converted from the laser output. So, what types of laser welding equipment are there, and what welding materials are available? We need to first understand the types of laser welding machines and their welding principles.
There are many types of laser welding machines. Regardless of their type, they all require a laser as their energy supply source, just like the "heart" of humans, which shows the importance of lasers. However, due to the variety of laser types, the functions and technical characteristics of laser welding equipment also vary. Currently, the types of lasers include CO2 lasers (carbon dioxide lasers), fiber lasers, semiconductor lasers (including UV lasers, green lasers, end-pumped/side-pumped lasers), YAG lasers, disc lasers, quasi-continuous lasers, etc. The reason for having such a variety of laser types is mainly due to the diverse materials used in industrial production, which require targeted lasers to complete production. The most important consideration here is the wavelength of the laser beam produced. We all know that different materials have different absorption rates for lasers. For example, materials like copper, aluminum, and nickel have strong reflective capabilities, with a maximum absorption rate of only about 3% for lasers. Most of the energy from the laser that hits their surface is reflected. The higher the conductivity, the higher the reflectivity. Sometimes, to better weld related materials, a high-power laser is needed to generate enough energy to complete the welding tasks, but the cost is also quite high.
Types of laser welding equipment and their corresponding Applications:
CO2 laser: Mainly used for marking and cutting non-metallic materials, with high power, but requires maintenance and replacement of related parts, and is gradually being replaced by other lasers.
Fiber laser: Can weld, mark, and cut metal materials, with limited small-scale applications for non-metal marking. When used for welding or cutting, the power can reach 300-5000W.
YAG laser: This laser mainly requires optical path design and calibration, which takes a lot of time. Currently, it is mainly used for metal welding, with a power generally below 1000W, but the beam quality is still good.
Semiconductor laser: Laser welding equipment equipped with semiconductor lasers has a wide welding range and high welding quality, but its welding speed is relatively low, mainly because the power of semiconductor lasers is generally not high. However, its welding quality and the types of materials it can weld are unmatched by other lasers.

What are the actual Applications of laser welding equipment?
Laser welding equipment is used to weld a variety of products, usually including stainless steel kitchen and bathroom utensils, battery welding, hardware tool welding, automotive welding, shipbuilding, medical devices, and other metal welding, involving heavy industry production, aerospace, military technology, and the biological field, covering almost all aspects of production and life. Currently, the most promising application field is the new energy sector, which is a common recognition internationally. The rapid development of new energy in China, including the current manufacturing and promotion of new energy vehicles, has significantly increased the demand for power batteries, leading to a sharp rise in the demand for laser equipment for battery welding. Therefore, the demand for battery laser welding equipment has become the most urgent product in the current and next 20 years. Its welding plays an irreplaceable role in aspects such as battery cap welding, explosion-proof valve (hole) welding, liquid injection hole welding, cell welding, nickel tab welding, busbar welding, soft connection, battery tab welding, and cover plate welding. Its process technology is also unattainable by other traditional welding methods.
The new characteristics of laser welding technology are fast welding speed, uniform energy distribution, small weld seams, small heat-affected zones, no need for post-processing, smooth welding surfaces, and strong welding strength. The key point is that its welding cost is low. A laser welding machine can cost around 100,000 yuan, or even more than 200,000 yuan, but in long-term industrial production applications, it is the most advantageous, with a higher cost-performance ratio and better process quality, making it an essential tool for future industrial production.

About Us

Shenzhen SHINHOP Laser Equipment Co., Ltd. It is a scientific and technological enterprise specializing in the research and development, production and sales of industrial laser processing equipment. It has been deeply engaged in the new energy industry for 20 years, focusing on the non-standard customization of automatic lithium battery cell assembly line and module PACK production line. It has successively obtained the national high-tech and specialized new enterprise certification.

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