研究目的
Investigating the process reliability and quality criteria of laser welding for hairpin windings in automotive traction drives.
研究成果
The laser beam welding process shows significant potential for the contacting of hairpin windings, with a proven short-term process capability suitable for series production. Optimization of the welding strategy can reduce displacement of the weld seam and avoid insulation damage.
研究不足
The study acknowledges the need for further stabilization of the process and ensuring the quality of contacts, suggesting the use of machine learning algorithms in future investigations.
1：Experimental Design and Method Selection:
The study focuses on the laser welding process for contacting hairpin windings, analyzing the process capability and optimizing the welding strategy.
2：Sample Selection and Data Sources:
Rectangular enameled copper wire with a cross-section of
3：2 * 5 mm is used, straightened, cut into 100 mm long pieces, and skinned in the joining zone. List of Experimental Equipment and Materials:
A TruDisk 8001 disk laser with a fiber diameter of 150 μm and a maximum output power of 8 kW is used for welding experiments.
4：Experimental Procedures and Operational Workflow:
The welding process involves positioning the sample parts under the optics by means of a specially designed clamping device, with variations in welding lines and power settings.
5：Data Analysis Methods:
The electrical resistance of the contacts is measured, and the relationship between welding depth and resistance is analyzed using regression analysis.
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