选择性激光烧结预热温度的自适应控制研究  

Investigation on the Adaptive Control Preheating in Selective Laser Sintering(SLS)

作　　者：钟建伟[1] 史玉升[1] 蔡道生[1] 黄树槐[1] 

机构地区：[1]华中科技大学塑性成形模拟及模具技术国家重点实验室,武汉430074

出　　处：《机械科学与技术》2004年第11期1370-1373,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：湖北省重点科技攻关项目 (2 0 0 1A10 7B0 2 )资助

摘　　要：SLS成形过程中 ,粉末预热温度是决定制件精度、强度的重要因素。当零件截面形状发生突然变化时 ,粉末预热温度需要随之变化 ,否则成形件将严重变形甚至不能使用。原有SLS设备采用人工干预实现变预热温度调节 ,劳动强度大且工艺参数不好控制。本文提出一种粉末预热温度的模型参考自适应控制方法 ,使预热温度随着具体切片几何形状变化而变化 ,真正实现生产过程的自动化、智能化。During the manufacturing period of SLS, temperature is one of the most important factors that affect the precision and intensity. In our practice, when the shape of section change greatly, we should improve the preheat temperature quickly for the powder, otherwise the last part will be deformed, the worst is to be destroyed. The former control system change the various temperature manually, but it is hard to control the last part′s precision. We bring forward a new MRAC control model in our temperature control period. This model is proved successful by practice.

关 键 词：SLS 预热温度 自适应控制 切片 

分 类 号：TG2[金属学及工艺—铸造]