研究目的
Investigating the analytical prediction of laser mediated polymer melt and damage width for process parameter prediction in manufacturing environments.
研究成果
The analytically derived, spatially discretized volumetric heating model is a viable real-time tool to facilitate automated laser process parameter prediction for polymer net-shape bonding with the provision of accurate materials data. However, the model exhibits minor melt width under-prediction and false positive damage prediction, indicating the need for accurate materials data and consideration of optical scattering within the material.
研究不足
The model's ideal Gaussian treatment of the transverse beam profile led to an under-prediction of the laser melting operational window. Combustion fumes witnessed also led to a gross reduction in damage width compared to that predicted.
1：Experimental Design and Method Selection:
An analytical model was developed to predict the line width of phase change in polypropylene (PP) sheets and films irradiated by a CO2 laser with a Gaussian beam profile.
2：Sample Selection and Data Sources:
A 3mm thick virgin PP sheet and a 25μm thick PP film were used as reference materials.
3：List of Experimental Equipment and Materials:
CO2 laser (F201, Synrad), 3x beam expander, galvanometric beam deflection mirrors (Flyer FH, Synrad), F-Theta lens (Synrad), and irradiated sample.
4：Experimental Procedures and Operational Workflow:
The laser was applied at varying incident spot diameters, powers, and traverse velocities to the PP materials.
5：Data Analysis Methods:
The model's predictions were compared to empirical data using Chi squared (χ2) goodness of fit factor to quantify the variation between predicted and empirical results.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
