The thesis addresses the development of a laser welding cell for welding rotor lamination stacks made of electrical steel. The key challenge is achieving the prescribed weld dimensions while preserving the magnetic properties of the material. The cell employs two disk laser sources with a wavelength of 1030 nm and a rated power of 2000 W, which simultaneously weld both sides of the stack.
The effects of laser power and welding speed were evaluated across 70 parameter combinations; the weld dimensions were measured using an optical microscope. Weld dimensions increase with increasing power and decreasing speed. Welding occurs in the transitional region between conduction and keyhole welding modes. A range of suitable parameters was determined. A comparison of the two laser sources revealed a difference in energy efficiency amounting to 64 W, which was compensated by setting different powers for the two sources.
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