第48卷第3期Vol.48No.3FORGING&STAMPINGTECHNOLOGY2023年3月Mar.2023■■■■■■■■■■■■■■■■■■板料成形盘形件两工步对称增厚旋压工艺刘发美,金俊松,李斌,高畅,张蕾,王新云(华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074)摘要:对称增厚旋压是一种针对薄辐板厚轮缘类盘形件的特种旋压技术,利用有限元模拟研究了两工步对称增厚旋压过程中坯料的变形规律、成形特点和缺陷的产生,以及各工艺参数对成形的影响。结果表明:摩擦因数μ、旋轮进给速度v以及坯料旋转速度ω对成形过程影响较小。在第1工步中,旋轮槽底宽度h、旋轮凹槽倾角α以及坯料长厚比γ对成形影响显著,随着旋轮槽底宽度h和旋轮凹槽倾角α的增大以及坯料长厚比γ越大,坯料越容易失稳形成缺陷;在第2工步中,旋轮槽底宽度h以及坯料的初始形状对成形影响显著,旋轮槽底圆角半径R能够改善坯料外边缘的应力状态,且R越大改善效果越明显。关键词:盘形件;对称增厚旋压;旋轮槽底宽度;旋轮凹槽倾角;圆角半径DOI:10.13330/j.issn.1000-3940.2023.03.006中图分类号:TG306文献标志码:A文章编号:1000-3940(2023)03-0043-11Atwo-stepsymmetricalthickeningspinningprocessfordisk-shapedpartLiuFamei,JinJunsong,LiBin,GaoChang,ZhangLei,WangXinyun(StateKeyLaboratoryofMaterialsProcessingandDie&MouldTechnology,HuazhongUniversityofScienceandTechnology,Wuhan430074,China)Abstract:Symmetricalthickeningspinningisaspecialspinningprocessfordisc-shapedpartswiththinspokeandthickrim.Therefore,thedeformationlawsandformingcharacteristicsofblank,thecauseofdefectsandtheinfluencesofprocessparametersonforminginthetwo-stepsymmetricalthickeningspinningprocesswerestudiedbyfiniteelementsimulation.Theresultsshowthatfrictioncoefficientμ,feedingspeedvoftherollerandrotationspeedωofblankhavelittleeffectontheformingprocess,whilegroovebottomwidthofrollerh,inclinationangleαofrollergrooveandlengthtothicknessratioγofblankhavesigmificanteffectontheforminginthefirststep.Withtheincreasingofgroovebottomwidthofrollerhandinclinationangleαofrolleraswellaslengthtothicknessratioγofblank,theblankismorepronetolosestabilityandformdefects.Furthermore,inthesecondstep,thegroovebottomwidthhofrollerandtheinitialshapeofblankhavesi...
