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

9309430盛本研究旨在开发一种基于激光的机床，用于轴对称和棱柱体零件的精加工，特别是由高强度金属合金、陶瓷和复合材料制成的零件。为了改善表面光洁度，减少表面热损伤，研究了切向激光入射、激光光栅化扫描、使用高波长辐射、使用离轴水射流、工件预热以及控制激光的时间和空间模式等具体技术。将建造一台原型机床，对几类工程材料的加工性进行评估，并进行梁/材料相互作用的理论分析。由此产生的机床预计在可加工的工件几何形状方面是灵活的，并将材料去除和热处理结合在一起。这些应用将特别适合于一些商业上出现的新激光器，如准分子、高辐射可调谐染料和铜蒸气激光器。***

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. ***