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基于有限元模拟技术,对包括切边工序在内的叶片精锻过程进行了准确模拟,并针对叶片锻造过程中叶身型面产生的尺寸偏差,采用模具型面直接补偿的方法对叶片精锻模具进行了三维优化设计.通过模拟,定量给出了锻件型面的尺寸偏差,建立了偏差类型与型面变形之间的关系.以锻件型面偏差总量最小为优化目标,设计了基于变化的权重优化算法,准确计算了模具型面各节点上的插补值,并利用B样条曲面构建技术对优化后的模具型面进行了重构.开发了模具型面直接补偿优化设计系统,并对镍基叶片模具进行了优化设计.结果表明,模具型面偏差明显减小,优化效果显著.
Based on the finite element simulation technology, the precise forging process of the blade, including the trimming process, was accurately simulated. According to the dimensional deviation of the blade body during the forging process, the die forging die The three dimensional optimization design was carried out.The size deviation of the forging surface was quantitatively given by simulation and the relationship between the deviation type and the deformation of the surface was established.Taking the minimum total deviation of the forging surface as the optimization objective, Weight optimization algorithm to accurately calculate the interpolation value of each node on the mold surface, and use the B-spline surface construction technology to reconstruct the optimized mold surface.The mold surface direct compensation optimization design system The optimal design of the nickel-based blade mold is carried out.The results show that the deviation of the mold surface is obviously reduced and the optimization effect is remarkable.