CAJ | 학술논문

采用有限元模拟方法分析大径厚比带轮筒壁铲旋成形过程，对成形过程中变形区域材料流动距离长、变形程度剧烈、易出现带轮筒壁欠肉及筒壁表面隆起等缺陷的形成机理进行研究。结果表明，带轮直筒壁上端部欠肉，是由于材料变形处于自由变形状态所致；筒壁内壁表面欠肉和外壁表面隆起，则是旋轮圆角半径、进给速度、摩擦条件等多种因素共同作用的结果。提出了相应的解决措施，并在CDC-400旋压机上进行试验，验证了数值模拟结果和解决措施的有效性。
채용유한원모의방법분석대경후비대륜통벽산선성형과정，대성형과정중변형구역재료류동거리장、변형정도극렬、역출현대륜통벽흠육급통벽표면륭기등결함적형성궤리진행연구。결과표명，대륜직통벽상단부흠육，시유우재료변형처우자유변형상태소치；통벽내벽표면흠육화외벽표면륭기，칙시선륜원각반경、진급속도、마찰조건등다충인소공동작용적결과。제출료상응적해결조시，병재CDC-400선압궤상진행시험，험증료수치모의결과화해결조시적유효성。
In boss forming of belt pulley cylinder with large diameter-thickness radio ,the flow distance of metal materials in de-formation area is long and the deformation is severe .The defects such as shrinkage of metal and surface uplift at the cylinder are prone to occur .In this study ,the forming mechanisms of these defects were investigated by finite element simulation .Free de-formation of metal at the top cylinder of belt pulley caused the shrinkage .The shrinkage of metal at the inner wall and the surface uplift were the result of joint influence of the roller roundness radii ,the roller feed velocity and the friction conditions .Some measures were proposed to avoid these flaws .A corresponding experiment was done with the CDC-400 spinning machine to vali-date the numerical simulation and those measures .