Advanced Joining Processes by Unknown

Author:Unknown
Language: eng
Format: epub
ISBN: 9789811529573
Publisher: Springer Singapore

It can be clearly seen with increasing focal length, on the one hand, the minimum beam diameter increases, and on the other hand, the divergence angle decreases. The right diagram also shows that the relative intensity distribution in the focus area changes with the focal length. If the focal length increases, the maximum relative intensity decreases and the width of the Gaussian curve increases.

4 Results and Discussion

Welding tests are now being carried out with the introduced experimental setup. The feed rate is varied with a constant optical power of 64 W. The welding process is carried out with the experimental setup. The entire process window is imaged, from the first slight adhesion to the first damage to the outer film layers. For evaluation, the samples are viewed from above with a light microscope, and cross section is performed which is analyzed by using a polarized microscope. This gives the opportunity to examine the heat-affected zone (HAZ) and also the weld seam width in detail (Figs. 7, 8, 9 and 10).

Fig. 7Laser optics design—focal length (PET12/PE90, 64 W, 100 mm)

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