目的 针对柔性旋压技术成形精度差、工件形状回弹严重的问题,研究旋压过程中回弹的影响因素,分析不同工艺参数的影响规律,并提出相关措施以提高工件精度、减小回弹。方法 以5A06铝合金锥形旋压构件为研究对象,引入回弹角作为评价标准,通过有限元仿真和试验相结合的方法,分析工艺参数对旋压构件回弹的影响,确定最优的工艺参数及回弹补偿方法。结果 根据模拟及试验分析,当采用等环向应变、小的进给比、小的道次变形量时,能够有效抑制工件回弹,并且通过增加 3°目标偏转角度的回弹补偿方式,将构件主要部分回弹偏差减少至-0.21°。结论 通过有限元与工艺试验相结合的方式,总结出了柔性旋压的回弹补偿措施,为控制柔性旋压构件回弹提供了有效的理论指导。
Abstract
Aiming at the problems of poor forming accuracy and severe spring-back of workpiece shapes in flexible spinning technology, the work aims to study the influencing factors of spring-back during the spinning process, analyze the influence laws of different process parameters, and propose relevant measures to improve workpiece accuracy and reduce spring-back. With 5A06 aluminum alloy conical spun components as research objects, the spring-back angle was introduced as an evaluation criterion. Through a combined approach of finite element simulation and experiments, the influence of process parameters on the spring-back of spinning components was analyzed to determine the optimal process parameters and spring-back compensation methods. Based on simulation and experimental analysis, adopting equal circumferential strain, a small feed ratio, and a small pass deformation could effectively suppress the spring-back of the workpiece. The spring-back compensation of adding 3° target deflection angle reduced the spring-back deviation of the main part of the component to -0.21°. By combining the finite element method with process tests, the rebound compensation measures for flexible spinning are summarized, providing effective theoretical guidance for controlling spring-back in flexible spinning components.
关键词
5A06铝合金 /
柔性旋压 /
回弹 /
无芯模旋压 /
有限元模拟
Key words
5A06 aluminum alloy /
flexible spinning /
spring-back /
die-less spinning /
finite element simulation
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基金
国家重点研发计划（2022YFB3404700）
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