研究目的
To estimate the bending angle of stainless steel-carbon steel laminated plates (SCLP) accurately by establishing an analytical model based on the temperature gradient mechanism.
研究成果
The proposed analytical model effectively predicts the bending angle of the SCLP, with an average error of 9.95%, significantly improving the accuracy compared to Liu’s model (38.02%). The model accounts for the depth of the plastic zone and the average compressive stress in the plastic zone, providing a theoretical and experimental basis for laser bending of the SCLP.
研究不足
The model results of the bending angle are slightly larger than those of the experimental verification, possibly due to higher maximum temperature in the heat-affected zone of materials during laser bending, resulting in larger error in material properties.
1：Experimental Design and Method Selection:
The study is based on the temperature gradient mechanism, using a piecewise function to establish the temperature distribution equation of the SCLP. The depth of the plastic zone is calculated by the recrystallization temperature. The average compressive stress of the plastic zone is calculated through the integral method by fitting the yield strength curves of stainless steel and carbon steel.
2：Sample Selection and Data Sources:
The SCLP combines the stainless steel layer and the carbon steel layer with a special preparation technique.
3：List of Experimental Equipment and Materials:
An LMT-5040 precise numerical control machine using a JK701H Nd:YAG pulsed laser (with a wavelength of
4：064 μm) was used for the laser bending experiment. Experimental Procedures and Operational Workflow:
The laser bending experiment was performed with different laser powers and scanning speeds. The bending angles were measured using a trilinear coordinates measuring instrument.
5：Data Analysis Methods:
The analytical model results were compared with experimental results to verify the accuracy of the model.
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