振动利用对FDM薄板机械性能的影响研究
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摘要
熔融沉积成型(Fused Deposition Modeling,FDM)是当今迅速发展起来的一种快速成型技术,然而其产品在机械强度方面很难与传统加工方式生产的零件相媲美,成为制约该技术发展的重要因素之一。首次将振动应用于FDM 3D打印过程以期提高制品的机械性能。首先,将振动引入FDM过程,完成了振动式FDM 3D打印机的改装;然后分别制备了振动引入前、后Z和X两个方向的拉伸试件,并完成了抗拉强度的检测试验;最后,对比分析利用振动加工的FDM试件和普通试件的实验结果,以研究振动对FDM薄板抗拉强度和正交各向异性的影响。试验表明,利用振动能够显著提高FDM薄板Z方向的抗拉强度、弹塑性以及稳定性,并能明显降低FDM薄板的正交各向异性。
Fused deposition modeling(FDM) is a current fast-growing rapid prototyping(RP) technology. However, products manufactured using FDM technology are hardly comparable to those manufactured with the traditional processing methods in mechanical strength to become one of important factors restricting the development of this technology. Here, vibration was applied in FDM sheets' 3 D printing process to improve their mechanical performances. Firstly, vibration was introduced into FDM process to complete refitting a vibration FDM 3 D printer. Secondly, specimens for tensile tests before introducing vibration and after introducing vibration in Z and X directions were manufactured, respectively to conduct their tensile strength detection tests. Finally, effects of vibration application on tensile strength and orthogonal anisotropy of FDM plates were investigated through contrastively analysis test results of specimens before introducing vibration and those after introducing vibration. Tests showed that vibration can significantly improve FDM sheets' tensile strength in Z direction, elasto-plasticity and stability; vibration can obviously reduce FDM sheets' orthogonal anisotropy.
Fused deposition modeling(FDM) is a current fast-growing rapid prototyping(RP) technology. However, products manufactured using FDM technology are hardly comparable to those manufactured with the traditional processing methods in mechanical strength to become one of important factors restricting the development of this technology. Here, vibration was applied in FDM sheets' 3 D printing process to improve their mechanical performances. Firstly, vibration was introduced into FDM process to complete refitting a vibration FDM 3 D printer. Secondly, specimens for tensile tests before introducing vibration and after introducing vibration in Z and X directions were manufactured, respectively to conduct their tensile strength detection tests. Finally, effects of vibration application on tensile strength and orthogonal anisotropy of FDM plates were investigated through contrastively analysis test results of specimens before introducing vibration and those after introducing vibration. Tests showed that vibration can significantly improve FDM sheets' tensile strength in Z direction, elasto-plasticity and stability; vibration can obviously reduce FDM sheets' orthogonal anisotropy.
引文
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[5] SERRA T,PLANELL J A,NAVARRO M.High-resolution PLA-based composite scaffolds via 3-D printing technology[J].Acta Biomaterialia,2013(9):5521-5530.
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[10] MOHAMED O A,MASOOD S H,BHOWMIK J L.Optimization of fused deposition modeling process parameters:a review of current research and future prospects[J].Advances in Manufacturing,2015(3):42-53.
[11] SHAFFER S,YANG K,VARGAS J,et al.On reducing anisotropy in 3D printed polymers via ionizing radiation[J].Polymer,2014,55:5969-5979.
[12] CARNEIRO O S,SILVA A F,GOMES R.Fused deposition modeling with polypropylene[J].Materials & Design,2015,83:768-776.
[13] NARAHARA H,SHIRAHAMA Y,KORESAWA H.Improvement and evaluation of the interlaminar bonding strength of FDM parts by atmospheric-pressure plasma[J].Procedia CIRP,2016,42:754-9.
[14] STAVA O,VANEK J,BENES B,et al.Stress relief:improving structural strength of 3D printable objects[J].ACM Trans Graph,2012,31:1-11.
[15] FOROOZMEHR E,LIN D,KOVACEVIC R.Application of vibration in the laser powder deposition process[J].Journal of Manufacturing Processes,2009,11(1):38-44.