摘要
采用正交试验设计的方法,选择聚乳酸(PLA)作为3D打印材料打印标准单拉试件,并对不同打印参数的试件进行抗拉强度、硬度和表面粗糙度等指标进行测试分析,优化打印工艺参数。实验结果表明:随着打印层高的增加,试件的抗拉强度出现先下降后上升的趋势,且当打印层高为0.25mm时,试件抗拉强度达到53.187MPa;试件的邵氏硬度出现了先上升后下降的趋势,在打印层高为0.2mm时,试件硬度达到最大值80.008;试件的表面粗糙度近似呈线性增长,当打印层高为0.1mm时,试件表面粗糙度为7.582μm。随着打印温度的增加,试件的抗拉强度出现波动下降趋势,当打印温度为185℃时,试件抗拉强度达到最大值53.382MPa;试件的硬度在205℃时,达到最高值80.418,随后出现明显的下降;打印温度的变化对试件表面粗糙度影响较小。随着打印速度的增加,试件的抗拉强度先明显下降,随后缓慢升高,当打印速度为30mm/s时,试件抗拉强度达到最大值53.186MPa;试件的硬度随着打印速度的增加而显著降低;打印速度的变化对试件表面粗糙度影响较小。
Using the orthogonal test method,PLA was selected as the standard single-pull test piece for 3D printing materials.The test parameters of tensile strength,hardness and surface roughness of the test specimens with different printing parameters were tested and analyzed to optimize the printing process parameters.The results show that with the increase of printing layer height,the tensile strength of the specimen decreases at beginning and then rises.When the printing layer height is 0.25 mm,the tensile strength of the specimen reaches 53.187 MPa.The Shore hardness of the specimen rose at early stage and then decreased.The hardness of the specimen reached a maximum of 80.008 when the print height was 0.2mm.The surface roughness of the specimen increases approximately linearly.When the print height is 0.1mm,the surface roughness of the specimen is 7.582μm.With the increase of printing temperature,the tensile strength of specimens fluctuates.When the printing temperature is 185°C,the tensile strength of the specimen reaches a maximum of 53.382 MPa.When the hardness of the specimen reaches 205°C,it reaches the highest value of 80.418,and then there is a significant decrease.The change of printing temperature has little effect on the surface roughness of the specimen.With the increase of printing speed,the tensile strength of the specimen firstly decreased,and then slowly increased.When the printing speed was 30mm/s,the tensile strength of the specimen reached a maximum of 53.186MPa.The hardness of the specimen decreases significantly with the increase of the printing speed;the change of the printing speed has little effect on the surface roughness of the specimen.
作者
石庆杰
肖军杰
程光耀
王天雨
文伟力
张睿
蒋小珊
SHI Qing-jie;XIAO Jun-jie;CHENG Guang-yao;WANG Tian-yu;WEN Wei-li;ZHANG Rui;JIANG Xiao-shan
出处
《绿色包装》
2018年第8期55-61,共7页
Green Packaging
基金
北京市优秀人才培养资助项目(No.2014000020124G109)
北京市教委科技计划重点项目(No.KZ201510015017)和北京市教委科技计划面上项目(No.KM201710015001
No.KM201710015002
No.KM201510015006
No.KM201610015010)
