Analysis of Laser beam welding of SS316L butt joints using Design of Experiments

Process control plays a significant role in increasing customer demand for quality, performance, cost; safety and reliability are essential for continuous growth, securing a process that allows least distortion after the laser welding process by applying with Experimentation Design. In the current experiments, the parameters of Laser power, welding speed, and Argon shielding are being used with L4 orthogonal array. These variables were checked to find the best control level combination of output and its related least distortion and maximum tensile strength. The X-ray radiography has tested the welds’ consistency and found that they are free from the surface and internal defects. The results show that welding speed, weld processes are critical parameter, and a shielding gas are not critical.

COMSOL SIMULATION OF LASER WELDING OF ALUMINUM

This research includes a Comsol Mutiphysics model describing the temperature distribution on aluminum during the laser conductivity welding process. The influence of laser power and speed on the welding process is discussed and compared with experiments. Numerical simulations of laser welding process have been performed to determine the temperature fields of laser impact to samples of aluminum. Numerical calculations are made for fiber laser. The plots of the temperature dependence on the surface and in the depth of aluminum samples on the velocity are analyzed for several power densities for this laser.

On the Development of a Surrogate Modelling Toolbox for Virtual Assembly

Virtual assembly (VA) is a method to simulate the physical assembly (PA) of scanned parts. Small local part deviations can accumulate to large assembly deviations limiting the product quality. The propagation of geometrical deviations onto the assembly is a crucial step in tolerance management to assess the assembly quality. Current approaches for VA do not sufficiently consider the physical joining process. Therefore, the propagated assembly geometry may deviate strongly from the PA. In the state of the art, only specific and complex methods for particular joining processes are known. In this paper, the concept of Surrogate Models (SMs) is introduced, representing the connection between part and assembly geometries for particular joining processes. A Surrogate Modelling Toolbox (SMT) is developed that is intended to cover the variety of joining processes by the implementation of suitable SMs. A particular SM is created by the composition of suitable Surrogate Operations (SOs). An open list of SOs is presented. The composition of a SM is studied for a laser welding process of two polymer components. The resulting VA is compared to the PA in order to validate the developed model and is quantified by the exploitation ratio R.