Abstract:Predicting the core temperature during welding is an ambitious aim in many research works. In this work, a 3D-scanner with integrated pyrometer is characterized and used to measure the temperature during quasi-simultaneous laser transmission welding of polyamide 6. However, due to welding in an overlap configuration, the heat radiation emitted from the joining zone of a laser transmission weld has to pass through the upper polymer, which is itself a semi-transparent emitter. Therefore, the spectral filtering o… Show more
“…The results indicated that the use of infrared radiation could be a promising tool for the temperature detection and weld quality control. Another work [55] has been reported a 3D-scanner with integrated pyrometer was designed to real-time monitor the temperature during quasi-simultaneous laser transmission welding of polyamide 6. By changing the laser power, the laser beam diameter and carbon black content in the lower polymer, the temperature information was acquired under different welding conditions.…”
“…The results indicated that the use of infrared radiation could be a promising tool for the temperature detection and weld quality control. Another work [55] has been reported a 3D-scanner with integrated pyrometer was designed to real-time monitor the temperature during quasi-simultaneous laser transmission welding of polyamide 6. By changing the laser power, the laser beam diameter and carbon black content in the lower polymer, the temperature information was acquired under different welding conditions.…”
“…The addition of particles or other materials can also be carried out to purposely alter the properties of the laser welded materials, changing their response to the laser radiation (Schmailzl et al 2020). This is useful, for example, in applications based in transmission laser welding processes, as described in Section 2 of this document.…”
Section: Additives For Enhanced Laser Weldability Of Polymersmentioning
Laser welding of polymers is a very popular industrial joining process, creating joints with good mechanical performance. However, the implementation of optimized laser welding processes is still quite limited since most industrial applications adopt an empirical approach to adjust the process parameters. The current work provides a summary of new findings on the subject of laser joining of polymers, describing the key operation modes of this joining method, its process parameters and how they affect the joint characteristics. The response of polymers to temperatures generated during laser welding is also discussed, as well as the effect of additives on the weldability of polymers.
“…Laser power [28,29,31,33,34,35,37,12,46,41,43,62,63,88,89,50,52,53,54,55,56,57,64,65,6,70,71,72,82,83,101,102,114,112,73,58,90,91,75,109,59,117,105,120,116,84] Welding speed [28,29,31,33,37,12,46,…”
Section: Tablementioning
confidence: 99%
“…This technique enables not only the development of a nondestructive technique to control the welding process, but also facilitates the part and process design as well as quality check in mass production. Schmailzl et al [90] used a 3D-scanner with integrated pyrometer to measure the temperature during quasi-simultaneous LTW of PA6 taking into account the spectral filtering of the laser radiation in the semi-transparent emitter upper polymer. Process simulations were performed to compare the temperature field with the measured temperature signal.…”
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