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In the development of advanced welding torches, a significant challenge lies in optimizing design and performance while minimizing costs and environmental impact. Traditionally, this has involved extensive physical testing, which is both time-consuming and resource-intensive. To address this, we increasingly use simulations to reduce the reliance on physical prototypes and welding tests, thereby accelerating the development process and promoting more sustainable practices. Our use of COMSOL Multiphysics typically involves simulations with multiphysics coupling, such as joule heating or induction coupling. For more basic cases, we primarily utilize the heat transfer physics. One of our newest tools to reduce welding tests are our time-dependent COMSOL Multiphysics simulations, which combine the heat transfer module, providing detailed insights into temperature distributions, and the events module, which controls heat fluxes over the duration of the test. Due to the operational methods of welding torches and the heat generated during the process, it is necessary to shut off the torch after a defined period and allow it to cool down. These temperature differences for the entire torch and individual parts are well approximated with COMSOL Multiphysics. To enhance the accuracy and applicability of our simulations, they are parallel-checked with real tests. The Application Builder within COMSOL Multiphysics has been instrumental in streamlining our workflow. We have developed specialized applications that encapsulate our simulation processes into user-friendly interfaces. These applications allow our engineering team to run simplified simulations and analyze results without needing extensive knowledge of the models. In conclusion, the integration of Simulations into our development process has proven to be a valuable resource, simplifying the extensive welding tests.