CAJ | 학술논문

针对某轨道客车顶端板拉深成形存在的缺陷，运用塑性力学理论进行应力分析，提出优化补充造型和翼边反向拉深的控制方法，并运用数值模拟分析不同因素对板料拉深回弹和翘曲的影响规律。结果表明，进行板料工艺补充、增加翼边拉深工序能有效地减小端壁翘曲和拱顶外张。增大板料大曲率半径段外扩量、增大压边力和减小凹模圆角半径能有效减小端壁翘曲回弹量。控制翼边顶料板圆角半径在R4~R8 mm，凸、凹模间隙在1.6~2 mm，翼边压边力小于3000 kN都能有效地控制板料拉深回弹。
침대모궤도객차정단판랍심성형존재적결함，운용소성역학이론진행응력분석，제출우화보충조형화익변반향랍심적공제방법，병운용수치모의분석불동인소대판료랍심회탄화교곡적영향규률。결과표명，진행판료공예보충、증가익변랍심공서능유효지감소단벽교곡화공정외장。증대판료대곡솔반경단외확량、증대압변력화감소요모원각반경능유효감소단벽교곡회탄량。공제익변정료판원각반경재R4~R8 mm，철、요모간극재1.6~2 mm，익변압변력소우3000 kN도능유효지공제판료랍심회탄。
Plastic mechanics theory was applied to carry out stress analysis on the defects existing in the drawing of a rail passenger car top plate. The optimization of supplementa-ry modeling and the control method of wing side reverse drawing were proposed; and then the influence law of different factors on the plate drawing springback and warping was ana-lyzed by using numerical simulation. The result shows that the process supplement of plate and the addition of wing side drawing process can effectively reduce the endwall warping and vault extension; and the enlargement of outside expanding amount of large curvature radius section, the increase of blank holder force and decrease of cavity die fillet radius can effectively reduce the warping springback amount. The drawing springback of plate can be controlled effectively by controlling of the fillet radius of wing side ejector plate in R4~R8 mm, the punch and die clearance in 1.6~2 mm, and the blank holder force of wing side less than 3000 kN.