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

9309430 Sheng本研究是为了开发一种激光机床，用于轴对称和棱柱形零件的精加工，特别是由高强度金属合金、陶瓷和复合材料制成的零件。研究了切线激光束撞击、激光束光栅扫描、高波长辐射、离轴水射流、工件预热、激光束时空模式控制等具体技术，以提高表面光洁度，减少表面热损伤。将构建一个原型机床，评估几种工程材料的可加工性，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完成的工件几何形状方面具有灵活性，并将材料去除和热处理相结合。这些应用将特别适合于一些新兴的商业激光器，如准分子激光器、高辐射可调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. ***