不锈钢0Cr18Ni9熔滴沉积参数优化
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摘要
在熔融沉积成型(FDM)过程中,为保证熔滴与基板之间有较好融合,本文首先对送丝速度、焊炬不同姿态以及焊炬与基板距离等参数下的熔滴沉积质量以及与基板融合变形过程进行了分析,采用VOF方法对熔滴的自由表面进行跟踪和修正,通过数值计算分别模拟了熔滴以一定速度撞击基板后铺展、融合的过程。通过模拟与试验验证得到可视化结果,表明不锈钢0Cr18Ni9熔滴沉积融合变形过程受多种因素影响,与实际相吻合。
In the process of fused deposition molding(FDM), in order to ensure a good convergence between the molten droplet and the substrate, under the parameters such as the wire feed speed, the different attitude of the welding torch, the distance between the welding torch and substrate, as well as molten droplet deposition quality and the deformation process when molten droplet merging with substrate has been respectively analyzed. The VOF method has been used to trace the free surface of the molten droplets with correction. The process of spreading and fusion of the molten droplet after it hitting the substrate at a certain speed has been respectively simulated through numerical calculation. Visualization results have been obtained with simulation and experiment confirmation. It showed that the stainless steel 0Cr18Ni9 molten droplet deposition fusion deformation process has been influenced by many factors, in conformity with the actual.
In the process of fused deposition molding(FDM), in order to ensure a good convergence between the molten droplet and the substrate, under the parameters such as the wire feed speed, the different attitude of the welding torch, the distance between the welding torch and substrate, as well as molten droplet deposition quality and the deformation process when molten droplet merging with substrate has been respectively analyzed. The VOF method has been used to trace the free surface of the molten droplets with correction. The process of spreading and fusion of the molten droplet after it hitting the substrate at a certain speed has been respectively simulated through numerical calculation. Visualization results have been obtained with simulation and experiment confirmation. It showed that the stainless steel 0Cr18Ni9 molten droplet deposition fusion deformation process has been influenced by many factors, in conformity with the actual.
引文
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[2]邹国林,郭东明,贾振元.FDM工艺出丝过程影响因素分析[J].制造技术与机床,2002,12:10-15.
[3]刘光富,李爱平.熔融沉积快速成型机的螺旋积压机构设计[J].机械设计,2003,20(9):11-16.
[4]宋丹路,周红燕,马德毅.熔融沉积快速成型的翘曲变形分析和解决方法[J].组合机床与自动化加工技术,2004,3:20-24.
[5]张家宽.熔融液滴撞击金属粉末表面的铺展和凝固模型[D].南京:南京航空航天大学,2008.
[6]汪洋,叶春生,黄树槐.熔融沉积成型材料的研究与应用进展[J].塑料工业,2005,33(11):21-26.
[7]林柳兰,莫健华.快速成型材料及应用[J].模具,2003,2(8):73-79.
[8]江开勇.熔融挤压堆积成形中材料丝的熔融过程分析[J].华侨大学学报(自然科学版),2000,21(3):302~306.
[9]唐志玉.挤塑模设计[M].北京:化学工业出版社,1997.6~74.
[10]江开勇.聚合物熔融挤压成形技术[J].工程塑料应用,2000,28(6):16~18.
[11]CHANG.DH.Rheology in polymer processing[M].New York:Academic press,1976,89-100.