摘要
为了满足功能梯度材料零件快速成形和制备的需要,开发了高精度数字化功能梯度送粉系统.该系统采用同步送粉带结构、优化的落粉调节装置和全程封闭负压式载气系统,实现了实时精确配比的多粉末梯度变比例送粉.送粉单元中30 kHz高频振动装置保证了系统对超精细粉末具有极好输送性.基于Lab Windows/CVI开发了送粉控制系统,并与功能梯度材料(FGM)快速成形系统集成和连接.试验结果表明:送粉系统在常速和低速送粉率下,具有送粉量精度高、线性度好、送粉稳定和均匀等特点,送粉误差小于1.5%,送粉重复误差在1%以下,最小送粉速率为0.005 g/s,能顺畅输送纳米陶瓷粉末.
The high accuracy numerical controlled functionally gradient powder feeding system was de- veloped to meet the requirements for functionally gradient materials （FGM） rapid manufacturing. In the system, timing driving belt, powder falls adjusting device and pneumatic conveying principle were adopted, the real time multi-powder precisely mixed proportion with desired ratio according to the FGM component ingredients distribution requirement was realized to manufacturing the metal or met- al-cermets FGM components with multi-material three dimensional body distributes. Vibrators shake in a vibration frequency of 30 kHz guarantee system good transportation characteristic with the ultra fine powders. The powder feeding control program was developed based on Lab Windows/CVI, and can be integrated in FGM rapid manufacturing system. Powders feeding experimental results indicate that the developed powder feeding system has high powder deliver quantity precision, stability and good linearity both in the constant powder febding speed and in very low feeding speed. The powder feeding quantity error is less 1.5 %, the powder feeding repetitive error below 1%, slightly powder feeding speed is 0. 005 g/s.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第5期86-89,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家高技术研究发展计划资助项目(2007AA04Z142)
国家自然科学基金资助项目(50675081)
关键词
快速成形
功能梯度材料
送粉系统
数字控制
调节装置
载气系统
rapid prototyping
functionally graded materials
powder feeding system
numerical control
adjusting device
pneumatic conveying system
