Vibration-assisted vat photopolymerization for pixelated-aliasing-free surface fabrication  

作　　者：Han Xu Renzhi Hu Shuai Chen Junhong Zhu Chi Zhou Yong Chen 

机构地区：[1]Center for Advanced Manufacturing,University of Southern California,Los Angeles,CA 90007,United States of America [2]Daniel J.Epstein Department of Industrial and Systems Engineering,University of Southern California,Los Angeles,CA 90089,United States of America [3]Department of Aerospace and Mechanical Engineering,University of Southern California,Los Angeles,CA 90089,United States of America [4]Department of Industrial and Systems Engineering,University of Buffalo,Buffalo,NY 14260,United States of America

出　　处：《International Journal of Extreme Manufacturing》2024年第3期440-456,共17页极端制造（英文）

摘　　要：Mask image projection-based vat photopolymerization(MIP-VPP)offers advantages like low cost,high resolution,and a wide material range,making it popular in industry and education.Recently,MIP-VPP employing liquid crystal displays(LCDs)has gained traction,increasingly replacing digital micromirror devices,particularly among hobbyists and in educational settings,and is now beginning to be used in industrial environments.However,LCD-based MIP-VPPsuffers from pronounced pixelated aliasing arising from LCD’s discrete image pixels and itsdirect-contact configuration in MIP-VPP machines,leading to rough surfaces on the 3D-printed parts.Here,we propose a vibration-assisted MIP-VPP method that utilizes a microscalevibration to uniformize the light intensity distribution of the LCD-based mask image on VPP’s building platform.By maintaining the same fabrication speed,our technique generates asmoother,non-pixelated mask image,reducing the roughness on flat surfaces and boundary segments of 3D-printed parts.Through light intensity modeling and simulation,we derived an optimal vibration pattern for LCD mask images,subsequently validated by experiments.We assessed the surface texture,boundary integrity,and dimensional accuracy of componentsproduced using the vibration-assisted approach.The notably smoother surfaces and improved boundary roughness enhance the printing quality of MIP-VPP,enabling its promisingapplications in sectors like the production of 3D-printed optical devices and others.

关 键 词：additive manufacturing vat photopolymerization piezo vibration sub-pixel resolution ALIASING 

分 类 号：TP391.73[自动化与计算机技术—计算机应用技术] TH74[自动化与计算机技术—计算机科学与技术]