CAJ | 학술논문

微挤压模约束下的激光冲击微体积成形技术是利用激光诱导的冲击波使局部金属在凹模约束下产生体积变形的一种成形新技术。为了分析不同板厚（0．12mm，0．15mm，0．17mm和0．22mm）的3003铝合金在不同凹模孔径（0．4mm，0．7mm，0．9mm和1．1mm）约束下的成形深度，采用建立有限元模型进行数值分析的方法，进行了理论分析和实验验证，取得了不同板厚和不同孔径成形下成形深度的数据。结果表明，成形深度随板厚的增大而增大趋势逐渐减小；对于同一厚度，板料成形深度随孔径的增大呈非线性增大趋势；对于同一点冲击，冲击次数对板料的成形深度影响很大。数值分析结果与实验吻合度较好，这一结果对微体积成形质量控制是有帮助的。
미제압모약속하적격광충격미체적성형기술시이용격광유도적충격파사국부금속재요모약속하산생체적변형적일충성형신기술。위료분석불동판후（0．12mm，0．15mm，0．17mm화0．22mm）적3003려합금재불동요모공경（0．4mm，0．7mm，0．9mm화1．1mm）약속하적성형심도，채용건립유한원모형진행수치분석적방법，진행료이론분석화실험험증，취득료불동판후화불동공경성형하성형심도적수거。결과표명，성형심도수판후적증대이증대추세축점감소；대우동일후도，판료성형심도수공경적증대정비선성증대추세；대우동일점충격，충격차수대판료적성형심도영향흔대。수치분석결과여실험문합도교호，저일결과대미체적성형질량공제시유방조적。
The micro-bulk forming with laser shock under the restriction of micro-extrusion die is a kind of new forming technology , which utilizes shockwave induced by laser to produce volume deformation of local sheet metal under the constraint of the die .A model of micro-extrusion of laser shock was developed to analyze the forming depth of different sheet thickness (0.12mm, 0.15mm, 0.17mm and 0.22mm) of 3003 aluminum alloy under different diameters of the micro-dies (0.4mm, 0.7mm, 0.9mm and 1.1mm).After establishing finite element model for numerical analysis , theoretical analysis and experimental verification were carried out and the data of the forming depth were obtained under different thickness and different diameters of the micro-dies.The results show that the forming depth increases sharply , then slowly with the increase of sheet thickness .For the same thickness , the sheet forming depth increases with the increase of diameter of the micro-die in a non-linear way.For the single shock, the number of shock has a great influence on the sheet forming depth.It is found that the simulation results are in accordance with experimental results , which gives support for the quality control of micro-bulk forming .