A novel approach of jet polishing for interior surface of small-grooved components using three developed setups  

作　　者：Qinming Gu Zhenyu Zhang Hongxiu Zhou Jiaxin Yu Dong Wang Junyuan Feng Chunjing Shi Jianjun Yang Junfeng Qi 

机构地区：[1]State Key Laboratory of High-performance Precision Manufacturing,Dalian University of Technology,Dalian 116024,People’s Republic of China [2]School of Energy and Power Engineering,Dalian University of Technology,Dalian 116024,People’s Republic of China [3]Key Laboratory of Testing Technology for Manufacturing Process,Ministry of Education,Southwest University of Science and Technology,Mianyang 621010,People’s Republic of China [4]Beijing Spacecraft Manufacturing Co.,Ltd,China Academy of Space Technology,Beijing 100094,People’s Republic of China [5]School of Mechanical Engineering,Hangzhou Dianzi University,Hangzhou,Zhejiang,People’s Republic of China [6]Facility Design and Instrumentation Institute,China Aerodynamics Research and Development Center(CARDC),Mianyang 621000,People’s Republic of China

出　　处：《International Journal of Extreme Manufacturing》2024年第2期428-447,共20页极端制造（英文）

基　　金：the National Key Research and Development Program of China(2018YFA0703400);the Young Scientists Fund of the National Natural Science Foundation of China(52205447);Changjiang Scholars Program of the Chinese Ministry of Education。

摘　　要：It is a challenge to polish the interior surface of an additively manufactured component with complex structures and groove sizes less than 1 mm.Traditional polishing methods are disabled to polish the component,meanwhile keeping the structure intact.To overcome this challenge,small-grooved components made of aluminum alloy with sizes less than 1 mm were fabricated by a custom-made printer.A novel approach to multi-phase jet(MPJ)polishing is proposed,utilizing a self-developed polisher that incorporates solid,liquid,and gas phases.In contrast,abrasive air jet(AAJ)polishing is recommended,employing a customized polisher that combines solid and gas phases.After jet polishing,surface roughness(Sa)on the interior surface of grooves decreases from pristine 8.596μm to 0.701μm and 0.336μm via AAJ polishing and MPJ polishing,respectively,and Sa reduces 92%and 96%,correspondingly.Furthermore,a formula defining the relationship between linear energy density and unit defect volume has been developed.The optimized parameters in additive manufacturing are that linear energy density varies from 0.135 J mm^(-1)to 0.22 J mm^(-1).The unit area defect volume achieved via the optimized parameters decreases to 1/12 of that achieved via non-optimized ones.Computational fluid dynamics simulation results reveal that material is removed by shear stress,and the alumina abrasives experience multiple collisions with the defects on the heat pipe groove,resulting in uniform material removal.This is in good agreement with the experimental results.The novel proposed setups,approach,and findings provide new insights into manufacturing complex-structured components,polishing the small-grooved structure,and keeping it unbroken.

关 键 词：abrasive air jet polishing multi-phase jet polishing interior curved surface small-grooved component aluminum alloy 

分 类 号：TG175[金属学及工艺—金属表面处理]