To fully soften the consumable bar metal material in the preheating stage of the frictional surface deposition additive manufac-turing(FSD-AM)process and form a uniform temperature field,the three-dimensional complete thermodynamic coupling model of the FSD-AM was established based on ABAQUS/Explicit,with AA6061 as the consumable bar and AA2024 as the substrate.The dual re-sponse surface method was used to optimize the process parameters of FSD-AM in preheating stage.The process window of rotation speed,downward pressure speed and preheating time was determined through single factor test.Box-Behnken response surface method was used to optimize the process parameters by taking the ratio of the center temperature at the bottom of the consumption rod to its melting point and the absolute value of the difference between the center temperature at the bottom of the consumption rod and the substrate temperature as the double response values.By optimized process parameters,the consumable rod is fully softened in preheating stage,and the tempera-ture difference between the consumable rod and the substrate is small,which provides a good preheating effect for the stable deposition stage.
关键词
摩擦表面沉积增材制造/数值模拟/双响应面/预热工艺/温度场
Key words
FSD-AM/numerical simulation/dual response surface/preheating process/temperature field
维普
万方数据