摘要
基于表面带有浮雕图案的双层金属保温容器外壳同步液压胀形成形技术特点和Dynaform软件,建立了相应的三维弹塑性有限元模型,采用正交试验法对篮球形双层金属保温容器外壳同步液压胀形成形过程进行了数值模拟;根据正交试验所得到的优化工艺参数,对足球及排球形双层金属保温容器外壳同步液压胀形成形过程进行了模拟研究,获得了同步液压胀形成形时,工艺参数对3种不同浮雕图案的成形质量、应力分布的影响规律,分析了影响外壳表面浮雕图案成形质量及产生成形缺陷的原因。结果表明,影响双层不锈钢真空保温容器外壳表面浮雕图案质量因素的主次顺序为:板料厚度、加载时间、加载压力;不同表面浮雕图案成形所需压力大小与图案复杂程度及纹理方向有关。
Based on the characteristics of synchronous hydro-bulging technology for producing double-layered metal vacuum containers and software Dynaform, a 3D FEA elasto-plastic model is established. The numerical simulation of the hydro-bulging process of the container with basketball shape is carried out by orthogonal experiment method. The numerical simulation on the container with football and volleyball shapes is carried out with the optimal process parameters obtained by the orthogonal experiment method for the basketball shaped container. The effect of the technology parameters on the forming quality and stress distribution of three empaistic patterns is obtained. The forming quality of the empaistic pattern on the outer-layer surface and the forming defect are analyzed. The results indicate that the factors affecting the quality of empaistic pattern on the outer-layer surface of the double-layered metal vacuum container are material thickness, loading time, loading pressure; the maximum principal stress of workpiece occurs mostly near the ridge regions of empaistic pattern, and the pressure of hydro-bulging for forming the different empaistic patterns is related to the complexity of empaistic pattern and the shape of empaistic ridge.
出处
《模具工业》
北大核心
2008年第5期27-33,共7页
Die & Mould Industry
关键词
双层金属容器外壳
同步液压胀形成形
正交试验
数值模拟
double-layered metal container
synchronous hydro-bulging
orthogonal experiment method
numerical simulation
