摘要
针对微成形技术中存在的脱模问题,提出利用激光冲击波在模具与工件界面上产生界面力进行脱模的新工艺。根据冲击波在介质中传播的特点,分别从冲击波垂直入射、冲击波脱模压力的计算、冲击波斜入射的角度讨论激光冲击波脱模的机理;然后在LS-DYNA软件中进行数值模拟,分析工件从模具上脱落的过程,并进一步讨论在一定冲击波压力下工件的脱模性能;最后按照数值模拟条件进行脱模实验,证实激光冲击波脱模的可能性。
The demolding problem in micro-forming technology often occurs.Our work was to present a new demolding process with the interface force which induced by laser shock wave between the interfaces of mold and work piece. According to the features of shock wave transmission in medium, the principles of the demolding using laser shock were concerned with the vertical incident of the shock wave, demolding pressure and shock wave oblique incident. The influence of the above three parameters on the demolding was discussed. Then the numerical simulation of the demolding process was analyzed using LS--DYNA software. The demolding property at certain shock pressure was fur-ther discussed. Finally, according to the optimized conditions of numerical simulation, the experiment was carried on to confirm the feasibility of laser shock wave demolding.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2009年第1期78-81,共4页
China Mechanical Engineering
基金
国家自然科学基金资助项目(50605029
50805069)
中国博士后科学基金资助项目(20060390961)
江苏省自然科学基金资助项目(BK2006551)
江苏大学高级人才启动基金资助项目(128300090
128300087)
关键词
激光冲击波
脱模
数值模拟
微成形
laser shock wave
demolding
numerical simulation
micro-- forming
