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Product Title: Analysis and Validation of Laser Spot Weld-Induced Distortion

Updated from Personify: 2014-11-06

Personify Product Code: TP01PUB102

Personify Product ID:       126059

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Author: G A Knorovsky, M P Kanouff, D O Maccallum, P W Fuerschbach



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Published Date: 2001-01-10

Page Count: 10

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Product Type:   TECHPAPER




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Laser spot welding is an ideal process for joining small parts with tight tolerances on weld size, location, and distortion, particularly those with nearby heat sensitive features. It is also key to understanding the overlapping laser spot seam welding process. Rather than attempting to simulate the laser beam-to-part coupling (particularly if a keyhole occurs), it was measured by calorimetry. This data was then used to calculate the thermal and structural response of a laser spot welded SS304 disk using the finite element method. Five combinations of process parameter values were studied. Calculations were compared to experimental data for temperature and distortion profiles measured by thermocouples and surface profiling. Results are discussed in terms of experimental and modeling factors. We then suggest appropriate parameters for laser spot welding. Authors: G. A. Knorovsky, M. P. Kanouff, D. O. MacCallum, P. W. Fuerschbach, Sandi National Laboratories, Albuquerque, NM and Livermore, CA.


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