选区激光熔化成形系统的动态聚焦技术研究  

Dynamic Focusing Technology for Laser Galvanometer Scanning of a Selective Laser Melting System

作　　者：章文献[1] 史玉升[1] 贾和平[1] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074

出　　处：《应用激光》2008年第2期99-102,共4页Applied Laser

基　　金：国家科技型中小企业创新基金(项目编号:05C26214201059)

摘　　要：针对二维振镜存在的聚焦误差问题,根据产生聚焦误差的原理,采用动态聚焦技术补偿聚焦误差。分析振镜激光扫描过程中的图形失真机理,采用坐标映射方式补偿图形畸变方法。基于PCI总线控制技术实现动态聚焦振镜扫描的控制,并将该动态扫描系统应用于选区激光熔化成形设备,通过选区激光熔化成形工艺实验,验证了所开发的动态聚焦系统满足选区激光熔化成形工艺要求。According to the principle of focusing error for two dimensions laser galvanometer scanning, a dynamic focusing optical model for correcting this error was put forward. Causes of Image distortion in the scanning process were analyzed, and mapping transformation for the focus positions was used. A dynamic focusing system based on the PCI bus control technique was developed. Then it was installed in a selective laser melting （SLM） machine. The tests results show that the developed dynamic focusing system can adapt to the SLM processing.

关 键 词：激光技术 动态聚焦 PCI总线控制技术 聚焦误差 

分 类 号：TH164[机械工程—机械制造及自动化]