【摘要】 目的 研究高温合金薄壁在V型密封环滚压成形时的应力应变规律，以解决成形过程中起皱缺陷难题。方法 基于ABAQUS有限元分析软件，建立了密封环多道次滚压成形三维弹塑性有限元模型，系统地分析了模具结构对高温合金V型密封环滚压成形变形特征的影响，并通过单因素法研究了工艺参数（滚轮直径、芯模转速和滚轮进给量）对密封环起皱、壁厚及外径的影响规律。结果 密封环滚压起皱本质上是坯料末端因缺乏模具约束而易发生周向屈曲进而形成褶皱，在芯模两端增设加强筋提高了滚压成形的稳定性，有效避免了起皱缺陷的发生；增大滚轮直径可降低壁厚减薄率，但对外径的影响较小；随着芯模转速的增大，壁厚减薄呈先增大后减小的趋势，外径基本不变；滚轮进给量的增加会加剧壁厚减薄并增大外径。结论 基于上述规律，在合适的工艺参数组合（滚轮直径为60 mm、芯模转速为6.3 rad/s、滚轮进给量为2.1 mm/r）下进行了密封环滚压试验，外径模拟值与试验测量值的误差小于1%，截面壁厚模拟值与试验测量值的误差小于10%。实现了高温合金V型密封环的精确成形。更多还原

【Abstract】 The work aims to study the stress-strain law of thin-walled superalloys during the rolling forming of V-shaped sealing rings to address the issues of wrinkling in the forming process. A 3D elastoplastic finite element model for multi-pass rolling forming of sealing rings was established using ABAQUS software. The influence of die structure on the deformation characteristics of V-shaped superalloy sealing rings during rolling forming was systematically analyzed. Additionally, the effects of process parameters(roller diameter, mandrel rotational speed, and roller feed rate) on wrinkling, wall thickness, and outer diameter of the sealing rings were investigated via a single-factor approach. The wrinkling defect in sealing ring rolling forming was fundamentally attributed to circumferential buckling of the blank ends due to insufficient die constraints. Adding stiffening ribs to both ends of the mandrel significantly enhanced forming stability and effectively mitigated wrinkling. Roller diameter increase reduced the wall thickness thinning rate but had negligible impact on outer diameter. Mandrel rotational speed increase initially intensified then suppressed wall thickness thinning, while outer diameter remained stable. Roller feed rate increase exacerbated wall thinning and expanded outer diameter. Based on the above findings, rolling experiments are conducted using optimized process parameters(roller diameter 60 mm, mandrel rotational speed 6.3 rad/s, roller feed rate 2.1 mm/r), outer diameter deviations are within 1%, cross-sectional wall thickness deviations remain below 10%. This validates the precision forming capability of V-shaped superalloy sealing rings.更多还原