摘要
为研究多技术辅助作用下的单点增量成形力变化情况,以静压支撑和超声振动两个技术同时辅助单点增量成形为例,对其成形力进行仿真模拟。以圆锥台为目标制件,利用ABAQUS对板料、夹具和工具头进行造型装配、材料定义、网格划分和边界约束,借助设定均布载荷和周期幅值,引入静压支撑载荷和超声振动轨迹,建立考虑静压支撑和超声振动的单点增量成形过程有限元仿真模型。仿真模拟成形力发现:垂向力F Z整体呈现阶梯式增大变化规律,F X与F Y整体呈现正弦交错式周期波动规律;垂向力F Z远大于水平力F X与F Y,是主要成形力;垂向力F Z随静压的增大而增大,随振幅和频率增大呈现先减小后增大的变化规律。为验证仿真模拟结果,设计相应的实验方案,结果与仿真结果趋势一致,验证了仿真模拟的正确性。该研究解决了多技术辅助单点增量成形在仿真模拟方面的不足,具有一定的参考和借鉴性。
To evaluate the change of single point incremental forming force under the multiple assistive technologies,two technologies of static pressure support and ultrasonic vibration simultaneously assisted single point incremental forming are taken as an example to simulate the forming force.The truncated cone is used as the target part,and ABAQUS is used to perform modeling assembly,material definition,meshing and boundary constraints for the sheet metal,fixture and tool head.Under the assumption of uniform load and periodic amplitude setting,the static pressure support load and ultrasonic vibration track are introduced to establish a finite element simulation model of the single point incremental forming process considering hydrostatic support and ultrasonic vibration.The following laws are found in simulating the forming force:The vertical force F Z obeys a stepwise increase change law as a whole,and F X and F Y obey a sinusoidal staggered periodic fluctuation law as a whole;The vertical force F Z is much larger than the horizontal forces F X and F Y,indicating that F Z is the main forming force;The vertical force F Z increases with the increasing static pressure,and the vertical force F Z first decreases and then increases with the increasing amplitude and frequency.To verify the simulative results,a corresponding experimental program is designed,and the obtained results coincide well with the trend of the simulative ones.
作者
王肖烨
李春磊
WANG Xiaoye;LI Chunlei(College of Mechanical Engineering,Baoji University of Arts and Science,Baoji,Shaanxi 721016,China;Shaanxi Key Laboratory of Advanced Manufacturing and Evaluation of Robot Key Components,Baoji,Shaanxi 721016,China)
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2020年第12期176-184,共9页
Journal of Xi'an Jiaotong University
基金
陕西省自然科学基础研究计划资助项目(2019JQ-896)
宝鸡文理学院博士启动费资助项目(ZK16043)。
关键词
多技术辅助
成形力
仿真模拟
multi-technical assistance
forming force
simulation
