文档介绍：中文摘要中文摘要花键冷滚压成形是-Too高效、精密、无切削的先进制造技术。采用冷滚压成形工艺具有生产率高、节能节材及产品性能好等优点,在高强度、高精度的花键轴类零件生产制造中得到越来越广泛的应用。但目前国N多'I-在花键冷滚压成形工艺与理论方面的研究较少,尤其对成形件的质量性能的研究还未见报道。现有的生产制造工艺基本上是依靠经验或试验方法来确定,缺乏系统的理论指导。根据金属塑性加原理和齿轮啮合原理,对花键冷滚压成形工艺原理及成形过程进行了分析,揭示了花键冷滚压成形机理。重点分析了成形过程中的分齿条件,滚压轮与工件的相对运动关系,建立了花键齿部成形过程的数学模型。建立了花键冷滚压成形有限元模型,应用DEFORM一3D软件对花键冷滚压成形过程进行了数值模拟。分析了滚压过程中力一行程变化规律,工件内部等效应力和等效应变的分布情况及工件材料的流动趋势。结果表明:在整个成形过程中,金属产生剧烈流动的范围集中在工件表层,中心部位基本不产生变形,最大等效应力出现在滚压轮与工件接触的位置,最大等效应变出现在花键齿槽处。对花键冷滚压成形工艺进行了实验研究,验证了理论分析和数值模拟方法的正确性。对比研究了冷滚压成形和传统插齿加工花键的表面粗糙度、金相组织及齿部轴截面硬度分布,结果表明:用新方法成形的花键齿面粗糙度得到了提高,齿形部分的晶粒得到了细化,连续分布的条形纤维流线保留完整,花键齿面的硬度有较大提高。本课题的研究为进一步研究花键冷滚压成形新技术和花键冷滚压生产提供了理论依据,对我国自主开发研制花键类零件冷滚压成形设备和冷滚压成形技术的推广应用具有重要意义。关键词:花键:冷滚压成形;数值模拟;微观组织;性能万方数据花键冷滚压成形研究万方数据 ABSTRACT ABSTRACT Cold rollingprocess ofspline is one ofthehigh—efficiency,precision and non-chip forming advanced manufacturing hasmany advantages such ashigh forming efficiency,energy-saving,low material consumption and betterforming properties coldrolling iswidely used inproduction ofhigh-strength andhigh-precision thetheory andprocess ofspline coldrolling are few studied ,there is no research on the quality and performance of the rolled existing forming technology andtheproduction oftendepend on systemic theory instructing theproduction islack. Based on theprinciples ofmetalplasticity andthemeshing,the processing mechanics ofspline coldrolling was analyzed and deforming mechanism inthe process ofspline coldrolling was spline tooth indexing principle, relative motion between rollerand workpiece were analyed emphasisly,The mathematical models oftoothprofile were built. The model offiniteelement was process ofspline cold rolling was simulated on DEFORM一3D software。The force—stroke curve, distribution ofequivalent stress,equivalent strainandtherule ofmetal material flowing were results showed mat material dramatic plastic def