High speed quasi-simultaneous welding of polymers can be considered as a process which can create high quality welds with short welding times and a wide power range. The flexibility of the process and processing tools makes it possible to create welds with complex shapes and sizes and it enables new design possibilities for polymer components. In most of cases laser welding results in scientific articles are studied by performing weld tests and the welding result i.e. the weld quality is evaluated afterwards. With a suitable simulation program most of this stage could be avoided. This study presents computer software Flexi2D for simulation of polymer welding. The software calculates the weld dimensions according to material properties and welding parameters. By the input data, a visual image about the heat input is created, which helps to understand the welding process.
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