双光源选择性激光烧结成型中预热温度场研究

Study on the Preheating Temperature Field of the Double Light Source Selective Laser Sintering

双光源选择性激光烧结成型可以制作大尺寸的制件,但对加工面预热温度场的均匀性提出了更高的要求。提出了一种不等高预热方法,并用ANSYS分析了各加热管组在不同高度、不同辐射力时的受热面温度的分布规律,获得了最佳温度场分布时各个加热管的具体高度,并在实验平台中进行了验证。

The double light source selective laser sintering can make big size of the parts,but a higher demand is put on uniformity of temperature field on the workpiece surface.It puts forward a method of unequal altitude preheating,using the finite element method to analyze the influence on preheating temperature field when the heating tube is at different heights and power,and optimum distribution of preheating temperature field are obtained with this method,and verified in the experiment.