摘要
叶片是航空发动机中一类量大面广的重要零件,精锻是叶片锻造的发展趋势。叶片精锻过程属于高温大变 形过程,坯料与模具和环境之间存在着热交换,同时塑性变形功以及坯料和模具间的摩擦功不断转化为热能,其结 果促使坯料内的温度场不断发生变化,进而影响到坯料的变形行为,并进一步影响锻件的微观组织及机械性能。因 此,本文采用三维热力耦合有限元数值模拟技术,利用自行开发的叶片锻造过程三维刚粘塑性热力耦合有限元模拟 系统对单榫头叶片精锻过程进行了模拟分析,研究了叶片精锻成形规律。该研究对制定叶片精锻工艺以及发展叶 片精锻技术具有重要的理论意义和实用价值。
A blade is one of the most important mechanical components in an aero-engine. Precision forging of blades is a tendency for development of blade-forging technology. However, precision forging process of blades involves high temperature and large deformation. There is heat transfer on billet-die interface, and plastic work and frictional work is turned to heat; all these factors make the temperature field of billet continually change. The change of temperature field will affect the deformation behavior of a billet, and the mechanical capability and microstructure of a blade. Therefore, the forging process of blade with a tenon is simulated and analyzed using a 3D-CTM(3-Dimensional Coupled Thermo-Mechanical Forming Simulation) in order to obtain forming laws in the precision forging process of blade. This study is important to optimization of precision forging technology and the development of its precision forging.
出处
《机械科学与技术》
CSCD
北大核心
2005年第2期135-138,共4页
Mechanical Science and Technology for Aerospace Engineering
基金
教育部国家重点实验室访问学者基金
陕西省自然科学基金(2001CS0401)资助
关键词
叶片
精锻
成形规律
热力耦合
有限元模拟
Blade with a tenon
Precision forging
Forming laws
Thermal-mechanical coupling
FEM (finite element method) simulation
