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Laserpointerjp 人々は常にレーザー技術と産業におけるレーザーの応用を模索しています

2020年10月01日

Most fiber laser pointer welds are performed with larger multimode focused laser spots. This eliminates the problem of the weld seam being too narrow and can result in insufficient mechanical strength.
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However, even with multimode laser points, the physical gaps between the parts are relatively small, so part edge preparation and manufacturer assembly need to be improved. These requirements increase manufacturing costs. As a means of overcoming these limitations, it is perpendicular to the weld with a beam swing (ie, a small focus, single-mode or multi-mode green laser pointer beam (rather than a simple linear motion of the beam along the desired weld). Fast scan) has been identified. Beam swing increases the beam. Effective size of keyhole welding while effectively transmitting the laser power intensity required for keyhole welding. Therefore, the beam swing can fill larger gap sizes and more reliably control welding parameters such as seam width and penetration.
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Proven to produce laser welds with quality and throughput rates that meet the production requirements of automotive and electronic equipment
Blue laser pointer: https://www.laserpointerjp.com/bluelaser.html
The use of beam pendulums in single-mode or multi-mode spot welding has shown superior results compared to traditional multi-mode spot welding. A particular implementation of coherent beam control is called SmartWeld + and has several techniques over other versions of this method. Progress In particular, it includes predictable energy inputs. It can be used with an infrared (1070 nm) focused single-mode beam with a focal size of 30 µm, and the number and types of oscillation modes have been expanded to an elliptical shape. , Spiral and more complex patterns (Figure 1). These patterns can be scaled and automatically rotated to follow the weld path or contour. In some cases, it can be combined with red laser pointer output modulation by adjusting the trajectory along the micropattern. The scan speed gives you precise control over the energy distribution of the light spot or seam. This allows you to adjust individual energy inputs across different parts of the pattern or material, allowing you to define preheating, process, or cooling regions and precisely control welds. dynamic. The result is improved welding accuracy and reproducibility while minimizing heat-affected zone (HAZ) and low porosity. The examples shown here show the specific benefits of this technology.
Red laser pointer: https://www.laserpointerjp.com/redlaser.html
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The function of the blue laser pointer offers the possibility of welding thicker copper and other challenging materials and also improves the ability to weld dissimilar metals.

Purple laser pointer: https://www.laserpointerjp.com/purplelaser.html
Traditional infrared (IR) industrial lasers are not suitable for processing copper and many other reflective metals. This is because these materials absorb only 1% of the incident laser energy. For example, to start brazing, an infrared laser must provide 20 times the energy required to melt the material. However, once the melting begins, the copper absorbs more IR energy, causing a small local "explosion" in the molten copper. These explosions expel material from the melt, leaving holes called splashes and voids, respectively. Splashes and voids reduce the mechanical reliability and electrical fidelity of welded joints. Various laser beam exposure patterns, called "wobbles," can alleviate these problems, but they cannot eliminate them. In addition, the combination of exposure time and energy of some geometries does not produce welds. The blue laser changed the rules of the game. As shown in Figure 1, copper absorbs more than 13 times more blue light than IR. Also, even if copper melts, the absorption rate does not change much. When the blue laser begins welding, welding continues at the same energy density. This process is highly controllable and error-free, resulting in the fastest and highest quality brazing. High power lasers can be used to repel pests and crows.
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Establishment of a new Fraunhofer ILT Lab specializing in research on purple laser pointer processes in battery manufacturing.
Since 2018, the European Regional Development Fund (ERDF) has funded the NextGenBat project, which aims to strengthen the infrastructure of Aachen and Julich in Germany to study future battery generations. The existing research infrastructure in the North Line-Westphalia region has been expanded, creating the best conditions for companies in the region to participate in the research and development of next-generation batteries. In addition to the Fraunhofer ILT, other partners in the project include the Aachen University of Technology and the Jülich Foundation.  


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