Fluid-solid coupling parameters of metal deposition forming
1.State Key Laboratory for Manufacturing Systems Engineering, Xi′an Jiaotong University, Xi′an, Shaanxi 710049, China; 2.CNC Engineering, Shaanxi Institute of Technology, Xi′an, Shaanxi 710300, China; 3.College of Mechanical Engineering, Shaanxi Institute of Technology, Xi′an, Shaanxi 710300, China
Abstract：To investigate the solid coupling process parameters of metal deposition, the VOF theory model was established to analyze the fluid-solid coupling deformation process for the whole droplet deposition. By changing related parameters, the fall and the spread out of molten droplets on the substrate surface were analyzed to discuss the effects of droplet diameter, impacting velocity and substrate temperature on the deformation process. The results show that in the dripping process of droplets, the temperature is gradually reduced from outer to inner, and the solidified layer is increased with basically unchanged internal center temperature. After hitting substrate, the molten droplets spread along the radius with gradually increased horizontal radius and decreased height. For different substrate temperature, the corresponding drop coagulation times are different. The lower the substrate temperature is, the faster the droplet solidification is. After impacting the preheated substrate, due to the metal droplet solidification, the volume fraction of droplets is decreased with the increasing of deposition time, but it has no effect on spreading time.
2015, Vol. 36 
