冷弯管模具有限元优化设计

采用基于有限元理论的优化设计方法对应用于反变形冷弯管弯曲的模具进行设计研究.将需要进行大量试验来改进的弯管工艺通过计算机模拟仿真来替代,预测出模具的变形和优化工艺参数,从而大大降低了生产加工成本.     

基于点云的可变式进气歧管曲面重建

文中提出一种基于截面线的方法重构可变式进气歧管曲面,用截平面数据点拟合一组截面线,在截面线的基础上进行蒙面操作,进而构造出符合点云外形的曲面.通过光顺性评价证明该方法简单有效.     

Finite element and experimental analysis for cold tube-bending of a power station boiler

Combining the computer simulation, theoretical analysis and experiments, this paper studies the process of tube-bending production of a power station boiler. The FEM-numerical simulation system was set up to study the performance features in the process of manufacturing cold tube-bending, such as ovality, thinning ratio of wall and the equipment driven force. Experiments were carried out in Harbin boiler factory. The parametric FEM model can simulate the force and quality parameters for tube-bending process and the error is within 5%. Experiments have demonstrated that the results achieved by this system are more useful and economical than those obtained through trial-produce method. It greatly reduces the production cost using computer simulation than conducting lots of experiments.