摘要
分析了汽轮机叶片锻坯设计所存在的问题:锻件飞边不均匀、试锻次数多等缺点;介绍了汽轮机叶片锻坯优化设计方法、步骤及其关键技术;借助于有限元正向模拟的方法,通过对叶片模锻成形模拟分析,得到了较为合理的叶片锻坯形状与尺寸。以RL1016叶片锻坯设计为例,进一步阐述了采用合理的经验参数初步设计汽轮机叶片锻坯,应用有限元数值模拟进行检验,经生产实践证明是可行的。这种设计方法提高了材料利用率,减少了试验次数,甚至可取消试锻,对于形状类似锻件的工艺设计有参考价值。
The problems on forging stock design of the steam turbine blade, such as non-uniform forging flash and overmuch times of testing forging were analyzed; the method, procedure and its key technology of optimized design for those problems were introduced. Simulation and analysis were carried out by using 3D rigid-viscoplastic FEM forward simulation for forging deformation of blade, and a reasonable shape and dimension of forging stock were obtained. As an example of the forging stock design for the steam turbine blade RL1016, the initial design of turbine blade＇s forgings by adopting available experience parameter was further described, the verification by application of forging simulation with the advanced Deform software was made. And it is proved that the optimized design is feasible in practice. With this new method, the material＇s utilizing rate is improved, the test times of forging are decreased effectively and even to be canceled, and it also has the reference value for the similar forging process.
出处
《锻压技术》
CAS
CSCD
北大核心
2008年第4期19-21,共3页
Forging & Stamping Technology
