摘要
针对6082铝合金U型臂三向压弯过程中因模具结构参数设计不合理导致的载荷波动大、端部折叠缺陷等问题,提出基于主动模结构参数协同优化的工艺调控策略。通过DEFORM-3D有限元模拟,系统分析了主动模型腔深度h与型腔倾斜角度θ对预弯曲及弯曲压扁阶段载荷分布、应力场及成形质量的影响。结果表明:型腔倾斜角度对预弯曲阶段最大载荷影响较大;当型腔倾斜角度θ≥80.5°时,型腔深度对弯曲压扁阶段的最大载荷影响较大。最优工艺参数组合为h=80 mm、θ=80.5°,此参数下的总成形载荷降低了18.7%,且预弯曲后坯料角度为最小的73°,在有效抑制压弯结束后端部折叠缺陷的同时降低了设备的最大载荷。本研究为三向压弯模具的结构优化设计及铝合金U型臂成形质量的提升提供了理论依据。
Aiming at the problems of large load fluctuation and end folding defects caused by irrational design of die structure parameters in the three-directional press bending process of 6082 aluminum alloy U-shaped arm,a process control strategy based on the cooperative optimization of active die structure parameters was proposed.Then,through DEFORM-3D finite element simulation,the influences of active die cavity depth h and tilt angleθon the load distribution,stress field and forming quality in the pre-bending,bending and flattening stages were systematically analyzed.The results show that the tilt angle of cavity has a greater effect on the maximum load in the pre-bending stage.When the tilt angle of cavityθ≥80.5°,the cavity depth has a greater effect on the maximum load in the bending and flattening stage,and the optimal process parameter combination is h=80 andθ=80.5°,which reduces the total forming load by 18.7%,and the angle of billet is a minimum of 73°after pre-bending.The end folding defect after bending is effectively controlled while the maximum load of equipment is reduced.This study provides a theoretical basis for the structural optimization design of three-directional press bending die and the improvement of the forming quality for aluminum alloy U-shaped arms.
作者
闫卓
来文信
陈钰金
梁培新
高俊峰
袁红霞
石一磬
王腾
Yan Zhuo;Lai Wenxin;Chen Yujin;Liang Peixin;Gao Junfeng;Yuan Hongxia;Shi Yiqing;Wang Teng(China Academy of Machinery Beijing Research Institute of Mechanical&Electrical Technology Co.,Ltd.,Beijing 100083,China;Shaoxing Jinjiang Machinery Co.,Ltd.,Shaoxing 312085,China)
出处
《锻压技术》
北大核心
2025年第5期234-244,共11页
Forging & Stamping Technology
基金
国家科技重大专项(2024ZD0608100)。
关键词
铝合金
U型臂
三向压弯技术
主动模结构参数
成形载荷
aluminum alloy
U-shaped arm
three-directional press bending technology
active die structure parameters
forming load
