基于MSC.Marc的钛合金激光快速成形过程模拟  

Simulation on Titanium Alloy Prepared by Laser Rapid Prototyping Process Based on MSC.Marc

作　　者：宋丽莉[1] 李庆[1] 

机构地区：[1]重庆电子工程职业学院机电学院,重庆400030

出　　处：《热加工工艺》2013年第15期68-71,73,共5页Hot Working Technology

摘　　要：钛合金激光快速成形是结合CAD/CAM、高功率激光熔覆和快速原型制造的先进技术。利用准确的热传递数学模型,建立起符合实验的物理模型,计算出正确的快速成形温度场、热应力场和残余热应力场。本文面热源模型采用高斯热源,考虑了材料热物理性能参数与温度的非线性关系,研究了用激光快速成形技术制造TC4零件过程中温度场的分布,并利用有限元软件MSC.Marc求解了相应热应力场和冷却后的残余热应力场和位移变化分布,分析了指定点的温度和应力随时间变化曲线,对成形过程进行了详细分析,为TC4零件的激光快速成形提供指导。Laser rapid prototyping for titanium alloy is the technology of combination of CAD/CAM and high power laser cladding and rapid prototyping manufacturing of advanced technology. For calculating the exact mathematical model of temperature field, the accurate model of rapid prototyping and the physical experiment must be established. Using the gaussian heat source, considering the material thermal physical property parameters, and paying attention to the temperature of the nonlinear relationship, the temperature field distribution in the process of manufacturing TC4 parts was studied by using laser rapid prototyping technology. By finite element software MSC.Marc, the corresponding thermal stress field and residual thermal stress field after cooling for TC4 parts were obtained. The curve of the temperature of the specified point changing with time and the forming process were analyzed. The results can provide guidance for manufacturing TC4 parts usiang laser ranid orototvoing.

关 键 词：钛合金 激光快速成形 高斯面热源 温度场 应力场 

分 类 号：TH164[机械工程—机械制造及自动化] TN249[电子电信—物理电子学]