摆动焊接动态过程温度场数值模拟
Numerical simulation on temperature field of dynamic welding processing with weaving
-
摘要: 通过对常用的摆动式焊接的温度场进行数值模拟,根据摆动式焊接的速度和方向变化的特点,在经典的双椭球热源模型的基础上建立了摆动电弧动态热源模型,采用大型商用MARC.MSC软件进行了三维温度场模拟,并采用热电偶进行测温,计算结果与试验结果相吻合。通过对摆动焊熔池的演变过程、温度曲线、峰值温度曲线进行了分析,研究发现,摆动式焊接与常规的无摆动焊的温度场特征不同,摆动焊的温度曲线在加热过程和冷却过程都有一个小波峰出现,熔池经历了多次加热冷却过程,并且熔池的峰值温度随横向摆动速度的增大而减小。Abstract: Numerical simulation the temperature field of welding with weaving widely adopted was numerically simulated. Heat source model of dynamic weaving arc was developed based on the classical double ellipsoid heat source model according to the character of velocity and direction variation of welding with weaving. Three dimension numerical model of welding with weaving was developed by MARC.MSC software.To verify the calculated results, the temperature was measured by the thermo-couple and the simulated curve agrees approximately with experiment data.Melten pool evolution, transient temperature and peak temperature were determined. Comparing with the results of the welding without weaving, a little peak appears during heating and cooling.Melten pool was multiple heated and cooled and its peak temperature decreased with increasing of weaving velocity.
-
点击查看大图
计量
- 文章访问数: 207
- HTML全文浏览量: 3
- PDF下载量: 62
- 被引次数: 0
下载:
