摘要
使用尼龙6(PA6)粉末材料进行选择性激光烧结(SLS)成型实验,以成型件的成型精度和表面粗糙度作为衡量指标,通过控制变量法、正交试验以及极差分析研究了预热温度、激光功率和扫描速度对其成型质量的影响。结果表明,PA6粉末材料SLS成型件的X向和Y向尺寸精度以及侧面表面粗糙度并不会明显受到相关工艺参数的影响,其均存在于-1.26%^-0.99%和-1.96%^-1.29%以及16.91~19.87μm范围内;以成型件的成型精度和上表面粗糙度作为衡量指标,PA6粉末材料SLS成型的最优工艺参数组合为:预热温度115℃,激光功率35 W和扫描速度1800 mm/s;在最优条件下进行烧结验证实验,得出成型件的X向、Y向和Z向的成型尺寸精度分别为-1.13%、-1.48%和0.75%;上表面及侧面的粗糙度分别为14.6和18.55μm。
The selective laser sintering(SLS)molding experiment was carried out with nylon 6(PA6)powder material.Taking the molding precision and surface roughness of the molded parts as the measurement index,the effects of preheating temperature,laser power and scanning speed on the forming quality of PA6 powder were studied by control variable method,orthogonal experiment and range analysis.The results show that the X-direction and Y-direction dimensional accuracy and the side surface roughness of PA6 SLS parts are not significantly affected by the relevant process parameters,which are all within the range of-1.26%^-0.99%and-1.96%^-1.29%and 16.91~19.87μm.The optimal process parameters of PA6 SLS parts are determined,which the preheat temperature is 115℃,laser power is 35 W and scanning speed is 1800 mm/s.The sintering verification experiment is carried out under the optimal conditions,and the forming dimensional accuracy in X-direction,Y-direction and Z-direction is-1.13%,-1.48%and 0.75%,respectively.The roughness values of the upper surface and the side are 14.6 and 18.55μm,respectively.
作者
李晓茸
张武
LI Xiao-rong;ZHANG Wu(College of Mechanical and Electrical Engineering,Xi an Railway Vocational&Technical Institute,Xi an 710026,China;College of Mechanical Engineering,Xi an University of Science and Technology,Xi an 710054,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2020年第4期61-66,共6页
China Plastics Industry
基金
陕西省重点研发计划项目(2018GY-163)
西安市科技计划项目(2019217714GXRC013CG014-GXYD13.7)。
关键词
选择性激光烧结
尼龙6
成型工艺
成型精度
表面粗糙度
Selective Laser Sintering
Nylon 6
Molding Process
Molding Precision
Surface Roughness
作者简介
通信作者:李晓茸,女,1983年生,讲师,主要从事机械制造与自动化方面的研究。19324390@qq.com。
