激光金属制造薄壁零件z轴单层行程模型

Model of layer thickness of thin-walled parts in laser metal direct manufacturing

为了提高激光金属直接制造薄壁零件的成形精度,制备出表面平整的薄壁零件,研究了z轴单层行程参数对成形薄壁试件表面精度的影响规律,提出并验证了z轴单层行程理论模型.结果表明,在一定简化条件下,根据质量守恒定律,推导出任意参数下的z轴单层行程模型,该模型显示z轴单层行程是单道熔覆层宽度与高度的函数,当z轴单层行程与模型计算值一致时,能够制造出表面平整的薄壁零件.

To improve the forming accuracy of thin-walled parts with smooth surface in laser metal direct manufacturing, the effect on the surface smoothness of samples is studied by different layer thicknesses. A model of layer thickness of thin-walled parts by single-trace laser cladding is proposed theoretically and studied by experimentally. The results indicate that the layer thickness can be defined as a function of the width and height of single-trace cladding layer under some conditions; when the layer thickness is equal to the value calculated, the sample can be fabricated with smooth surface. It is beneficial to choose process parameters for forming thin-walled parts in laser metal direct manufacturing.