Numerical Simulation on Temperature Field of the Molten Pool under the Variable Duty Ratio Laser with the inner Coaxial Powder Feeding

被引：0

作者：

Shi, Gao-lian ^{[1
,2
]}

Shi, Shi-hong ^{[2
]}

Wu, Shao-hua ^{[1
]}

Wang, Yong-Kang ^{[2
]}

机构：

[1] Suzhou Inst Ind Technol, Suzhou 215104, Peoples R China

[2] Soochow Univ, Sch Mech & Elect Engn, Suzhou 215021, Peoples R China

来源：

FUNCTIONAL MANUFACTURING TECHNOLOGIES AND CEEUSRO II | 2011年 / 464卷

基金：

中国国家自然科学基金;

关键词：

duty ration; ring laser; inner powder feeding; molten pool; temperature field;

D O I：

10.4028/www.scientific.net/KEM.464.405

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Aimed at the process of laser rapid prototyping with inner coaxial powder feeding, the finite element model on the transient temperature field of the molten pool is built and the transient temperature field of the molten pool under the laser with variable duty ratio is simulated numerically. The results show that the duty ratio of the laser affects the shape, dimension and power distribution of the molten pool. With the processing parameters: laser power (P)=3000W, outer diameter(d2)=4mm, scanning speed(V=5mm/s), the ideal value of ratio duty(K) is from 0.35 to 0.6. The shape of the molten pool is saddle shape or crescent. The position of the molten pool falls behind the center of the laser beam with the deviation to the both sides. Through shooting the molten pool with the high speed CCD camera, we find the experiments show that the images are close to the numerical simulation nephograms and then demonstrate that the numerical simulations are right.

引用

页码：405 / +

页数：2