板料拉深中的拉延筋设置规律研究

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1、山东犬学硕士学位论文板料控深中镌拉廷篱设罴规律臻究摘要设霪控延篾楚掇囊复杂塑嚣挽深枣}残影缘馋蛙魏有效等爱，等效拉廷瓣技术使挝延筋数值模拟成为当今扳料成形中拉延筋设计的主螫途径。然而，在模拟试验中，要确定等效拉延筋的类骢、参数及能置是一个较为复杂的问题，需要锻纛蘸久墓结煞经验霖瓣，逶避不断戆谖整j瓣试验方麓褥麓交爨缝暴。钤对这一现状，本文对不同形状拉深件中拉延筋的设置规律进杼了研究。本文将常见的舆型形状拉深件进行分类，应用板料成形分析软件D鞠峨FOt爱Ⅺ豹等效控延麓摸羧凌缝，对这些典蘩拉深谗分麓逐嚣蕴延笈浚嚣的数锻模拟试验。通道对模拟试验结果的分析，得出拉延筋凝型随拉深件凹模口轮廓

2、形状的设置舰律，并通过在某蹲便器拉深件和车身覆盖件模具设计中的痤溺，谖饔了其《鼗淫，垒嚣总续鼹验涯了瑰蠢熬、奏美控延楚设萋爨经羧移原则。为探讨拉深件心模口轮廓圆弧部分的拉媛筋在类型选择上的规律，利用正交试验浚诗方法，遴逶大量弱摸羧试验巍试骏缝栗分辑，急络逡鋈嚣繇分羧廷筋的炎溅随板料厚度、拉深件尺寸，临边轮辞曲线曲率的变化趋势，以及搬延筋拉题阻力与以上因素之间的关系。从而使实际生产中，拉殛筋的类比设嚣以及在按深王转尺寸绶藁些王艺参数交曩二豹薅濒下强餐调整缎延荔有了魏德可循。关键词：板料成形数值模拟；挽深；DYNAJ嗡RM；等效投延筋；芷交试验设诤ABSTRACT■■■S!s!t!■■

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7、eanalysisoftheresults，therelationshipbetweenthedrawbead’s咖ewhichnexttothearcpartofthedic'scontourandtheblankthickness,thedrawingpareslengthorothersizeofthepart’sisfounded。whichissupposedtodirectthedrawbcadinstallationintherealsheetmetal