CAJ | 학술논문

研究影响板料拉深失稳的因素大都忽略凸模运动曲线对板料成形极限性能的影响，利用伺服压力机可加载任意滑块速度和位移，以筒形件拉深为研究对象，加载了不同的凸模运动曲线，采用ANSYS／LS‐DYNA进行拉深模拟并经实验论证。结果表明，不同的凸模运动曲线对拉深件厚度减薄率分布会产生很大的差异，其中台阶式凸模运动曲线对提高板料极限成形能力最为显著。
연구영향판료랍심실은적인소대도홀략철모운동곡선대판료성형겁한성능적영향，이용사복압력궤가가재임의활괴속도화위이，이통형건랍심위연구대상，가재료불동적철모운동곡선，채용ANSYS／LS‐DYNA진행랍심모의병경실험론증。결과표명，불동적철모운동곡선대랍심건후도감박솔분포회산생흔대적차이，기중태계식철모운동곡선대제고판료겁한성형능력최위현저。
Most research works about unstability deep‐drawing of sheet metal didn't take the influences of die motion curves on limited forming property of sheet metal into considerations . T he application of servo‐press makes it possible to change the speed and position of the slide . Taking the cylindrical cup as an example , the ANSYS/LS‐DYNA is used to simulate the process of the deep drawing with the various curves of the die motion .The results illustrate that various die motion curves influences significantly on the distribution o f thickness reduction rate in a cylindrical cup .The most significant influence on the improvement of limited forming capacity of sheet metal is the stair‐alike die motion curve .