A Brief Analysis of the Characteristics of Laser Swing Welding Head in Improving Welding Process Technology
2019-07-01
Metal laser welding is an essential processing procedure in industrial production, and its demand will continue to grow. However, traditional welding has technical limitations. In recent years, advancements in laser welding technology have significantly improved the application of laser welding equipment in industry. How to combine laser welding technology with metal welding is a new challenge in the welding field.
If you have been researching welding processes, you must have encountered the impact of the weld seam on welding. In the past, laser welding typically involved a fixed spot size, which could not change in real-time according to the size of the weld seam. Recently, IPG launched a Wobbler swing welding head. This welding head combines laser beam oscillation with seam tracking technology, allowing it to adjust the lateral position of the welding head when the seam position changes, and it can also provide superior welding quality on highly reflective materials. The standard welding head is designed to focus the collimated laser beam to the desired spot size while maintaining a static beam path during beam transmission, presenting a static spot on the focal plane.
This standard configuration limits each setting to specific applications. In contrast, the swing welding head integrates scanning galvanometer technology within the standard welding head. By moving the beam with internal mirrors, the focal spot is no longer static and can be dynamically adjusted by changing the shape, amplitude, and frequency of various patterns, providing optimal frequency settings based on spot size, swing diameter, and linear welding speed. Moreover, this welding technology is compatible with standard coaxial nozzles and auxiliary gas devices, which can suppress the metal vapor generated during welding and help control the occurrence of plasma phenomena, thereby managing spatter.
The benefits of this swing welding method become more apparent when using smaller laser spots. When using near-infrared (NIR) wavelengths, smaller spots achieve tremendous power density, overcoming the high reflectivity of materials such as copper and aluminum, thus forming a stable state with a wide processing window. Additionally, when using optimal swing parameters, it avoids the formation of pores and cracks. This opens up new applications for infrared fiber lasers in the fields of electric vehicles and battery manufacturing.
Furthermore, different metal manufacturers often need to weld various parts, which requires welding equipment to have a certain degree of flexibility to meet the specific requirements of each part. Changing the swing diameter can alter the welding width and penetration depth without changing any optical configuration or spot size. For a constant energy input, as the swing amplitude increases, the shape of the weld seam changes from the traditional nail head shape to a rectangular shape. This customizable control of the welding cross-section can be used in the welding of battery connectors for high-power battery packs, producing a larger welding contact area, thereby reducing resistance in the weld joint and providing good mechanical connection performance.
When welding heterogeneous materials (such as copper and aluminum) in an overlapping manner, the dilution rate of the materials can be controlled by managing the penetration depth. By shallow melting of the underlying metal sheet, the amount of molten material can be minimized, and dilution can be controlled to reduce the formation of intermetallic compounds without the need for filler materials.
Generally, traditional laser welding requires high-precision fixtures, but in many cases, the welded parts are not actually clamped in the ideal position. Beam oscillation technology can significantly reduce the clamping requirements for these workpieces, and the acceptable seam gap and offset for swing welding are 2 to 3 times that of conventional laser welding.
Swing laser welding technology has been well applied at SHINHOP Laser Equipment Company, which is developing its own swing welding head system based on years of accumulated experience in laser application technology, further optimizing the performance of swing laser welding in industrial applications to better meet user needs and usage habits.
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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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Company Address：Building 6, Jingneng Science and Technology Environmental Protection Industrial Park, No.3 Baolong 2nd Road, Longgang District, Shenzhen City, Guangdong Province
Customer service hotline:18898357350
Customer service E-mail:info@shinhop.com
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