Laser technology for copper welding with flexibility and automation
Release time:
2022-12-01
【Summary Description】 Manufacturers are looking for efficient, feasible and easily automated solutions to fully meet the increasingly stringent requirements in terms of quality and quantity of power electronic components for electric mobility. In addition, construction and connection techniques are included. The commonly used copper joining process has limitations due to long cycle times and insufficient solder quality. The interference factors such as spatter and heat input will cause damage to the surrounding components, so laser technology is very important for the welding of power electronic components. In addition, fluctuations in weld depth can cause problems. Laser technology has the characteristics of flexibility and automation, and has become a good alternative to traditional welding technology. And fully able to meet customer demand for production capacity and quality. However, it is difficult to weld copper, a highly reflective material, due to the current infrared laser. Especially in the field of small parts with small welding depth (<1mm), near-infrared laser cannot accurately control the welding depth and quality. However, new developments in beam sources are changing this: lasers, which can be better coupled to green wavelengths, are now available in industry, with enough power to increase productivity while achieving virtually spatter-free processing. For applications where green power is still limited (e. g., large part sizes and weld depths> 1mm),BrightLine Weld enables infrared laser technology with better laser-material coupling performance, which greatly improves productivity and quality. Power electronics manufacturers in the field of electric vehicles are facing the challenge of adopting automation and more efficient production processes to meet the growing demand. The traditional process can not meet the requirements of resistance welding and ultrasonic welding. For example, the welding of internal direct brazing (DCB) and the welding of the external bus bars of the inverter and control unit.
Manufacturers are looking for efficient, feasible and easily automated solutions to fully meet the increasingly stringent requirements in terms of quality and quantity of power electronic components for electric mobility.
In addition, construction and connection techniques are included. The commonly used copper joining process has limitations due to long cycle times and insufficient solder quality. The interference factors such as spatter and heat input will cause damage to the surrounding components, so laser technology is very important for the welding of power electronic components. In addition, fluctuations in weld depth can cause problems. Laser technology has the characteristics of flexibility and automation, and has become a good alternative to traditional welding technology.
And fully able to meet customer demand for production capacity and quality. However, it is difficult to weld copper, a highly reflective material, due to the current infrared laser. Especially in the field of small parts with small welding depth (<1mm), near-infrared laser cannot accurately control the welding depth and quality.
However, new developments in beam sources are changing this: lasers, which can be better coupled to green wavelengths, are now available in industry, with enough power to increase productivity while achieving virtually spatter-free processing. For applications where green power is still limited (e. g., large part sizes and weld depths> 1mm),BrightLine Weld enables infrared laser technology with better laser-material coupling performance, which greatly improves productivity and quality.
Power electronics manufacturers in the field of electric vehicles are facing the challenge of adopting automation and more efficient production processes to meet the growing demand. The traditional process can not meet the requirements of resistance welding and ultrasonic welding. For example, the welding of internal direct brazing (DCB) and the welding of the external bus bars of the inverter and control unit.
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