Research Initiation Award: Laser-Based Machine Tool for Surface Grinding

小行星9309430 本研究是为轴对称和棱柱形零件，特别是由高强度金属合金，陶瓷和复合材料制成的零件的激光加工机床的发展。 研究了切向激光束冲击、激光束光栅扫描、使用高波长辐射、使用离轴水射流、工件预热以及控制激光束时间和空间模式等具体技术，以提高表面光洁度并减少表面热损伤。 将建造一个原型机床，几类工程材料的可加工性进行评估，梁/材料相互作用的理论分析。 预期所得到的机床在工件几何形状方面是灵活的， 可以完成，并将联合收割机材料去除和热处理相结合。 这些应用特别适合于商业上出现的一些新激光器，如准分子激光器、高辐射率可调谐染料激光器和铜蒸气激光器。***

9309430 Sheng This research is for the development of a laser based machine tool for the finishing of axisymmetric and prismatic parts, especially parts made from high strength metal alloys, ceramics, and composites. Specific techniques such as tangential laser beam impingement, raster scanning of the laser beam, use of high wavelength radiation, use of off axis water jet, workpiece preheating, and control of laser beam temporal and spatial modes are researched to improve surface finish and reduce surface thermal damage. A prototype machine tool will be constructed, several classes of engineering materials evaluated for their machinability, and theoretical analysis of beam/material interaction performed. The resulting machine tool is expected to be flexible in terms of the workpiece geometries that could be finished, and would combine material removal and heat treatment. The applications would be especially well suited to some new lasers emerging commercially, such as excimer, high radiance tunable dye, and copper vapor lasers. ***