锻压技术

旋转挤压过程中凸模结构参数对成形质量的影响

英文标题：Influence of punch structure parameters on forming quality during rotary extrusion

作者：吴耀金何金龙陈喆张治民李国俊薛勇

单位：中北大学

分类号：TG379

出版年,卷(期):页码：2019,44(3):65-71

摘要：

在Deform-3D有限元模拟过程中采用正交实验的设计方法，系统研究了双工作带凸模不同迎流面形态参数对AZ80镁合金内环高筋筒体旋转挤压过程中折叠与成形损伤的影响规律。结果表明：在变形温度为380 ℃，模具温度为410 ℃，变形速率为0.5 mm·s-1，摩擦系数为0.3的成形条件下，张开角α对折叠角γ有显著影响，但对损伤值的影响不显著；倾斜角β和倒角半径R对折叠角和损伤值的影响不显著。综合考虑，当迎流面相关参数分别为：张开角α为90°、倾斜角β为 8°、倒角半径R为3 mm时，所得构件凹槽的相关性能最佳。同时，按照优化后的工艺参数进行了物理实验，证实了数值模拟的可靠性。

The influences of different flow-surface morphology parameters of double working belt punch on the fold defects and forming damage in the rotary extrusion of AZ80 magnesium alloy cylinder with inner ring ribs were systematically analyzed by the orthogonal experimental design method in the simulation process of software Deform-3D. The results show that when the deformation temperature is 380 ℃, the mold temperature is 410 ℃, the deformation rate is 0.5 mm·s-1, the friction coefficient is 0.3, the opening angle α has a significant effect on the folding angle γ, but the effect on the magnitude of the damage value is not significant, and the inclination angle β and the chamfering radius R have no significant effect on the size of the folding angle and the magnitude of the damage value. In summary, when the relevant parameters of the flow-surface are opening angle α of 90°, inclination angle β of 8°, the chamfering radius R of 3 mm, the related performance of the component groove is the best. In the meanwhile, physical experiments are carried out according to the optimal technological parameters, and the reliability of numerical simulation is confirmed.

基金项目：

国家重点研究计划资助项目(2016YFB0301103)；山西省基础研究计划资助项目(201601D102018)

吴耀金(1975-)，男，博士，副教授，E-mail：wyj@nuc.edu.com；通讯作者：薛勇(1978-)，男，博士，教授，E-mail：YongXue395@163.com

参考文献：

［1］王渠东，王俊，吕维洁.轻合金及其工程应用
［M］.北京：机械工业出版社，2015.

Wang Q D, Wang J, Lyu W J.Light Alloy and Its Engineering Application
［M］.Beijing: China Machine Press,2015.

［2］周宇静，程秀全，夏琴香. 细长薄壁筒形件错距旋压成形工艺研究
［J］.轻合金加工技术,2011,39(8): 30-34.

Zhou Y J，Cheng X Q，Xia Q X. Research on stepped spinning process of long and slim thin wall tube
［J］.Light Alloy Fabrication Technology,2011,39(8):30-34.

［3］侯令华,李新和,俞大辉,等.薄壁曲面构件旋压成形工艺
［J］.锻压技术,2018,43(11):59-65.

Hou L H, Li X H, Yu D H.Spinning process for thin-walled spherical part
［J］. Forging & Stamping Technology, 2018,43(11):59-65.

［4］杨合，詹梅，李甜，等.铝合金大型复杂薄壁壳体旋压研究进展
［J］.中国有色金属学报，2011，21(10)：2534-2550.

Yang H, Zhan M, Li T,et al. Advances in spinning of aluminum alloy large-sized complicated thin-walled shells
［J］.The Chinese Journal of Nonferrous Metals,2011,21(10):2534-2550.

［5］张治民，李国俊，王强，等.一种筒形件的内横筋挤压方法
［P］.中国：CN104624694A，2015-05-20.

Zhang Z M, Li G J, Wang Q,et al. Internal transverse bar extrusion method for tube shaped parts
［P］.China: CN104624694A,2015-05-20.

［6］Zhang Z M, Yu J M, Wang Q, et al. Rotary extrusion producing method for producing inner ring rib with large aspect ratio formed of hollow billet
［P］. America: US20180056351, 2018-03-01.

［7］Yu J M, Zhang Z M, Li X B, et al. Rotary extrusion producing mold for producing inner ring rib with large aspect ratio formed of hollow billet
［P］ . America: US20180056353, 2018-03-01.

［8］Yu J M, Zhang Z M, Wang Q, et al. Rotary extrusion as a novel severe plastic deformation method for cylindrical tubes
［J］. Materials Letters, 2018, 215:195-199.

［9］贾艳楠，吴耀金，薛勇，等.镁合金厚壁锥壳构件内环筋挤压成形金属充填规律研究
［J］.锻压技术，2015，40(2)：93-97，126.

Jia Y N, Wu Y J, Xue Y, et al. Research on metal filling regularity of inner annular rib extrusion forming in the thick conical shell of magnesium alloy parts
［J］. Forging & Stamping Technology, 2015, 40(2):93-97,126.

［10］白蕊.AZ80镁合金杯形件旋转挤压成形研究
［D］.太原：中北大学，2015.

Bai R.The Study of Rotating Extrusion for AZ80 Magnesium Alloy Cup
［D］.Taiyuan: North University of China, 2015.

［11］李天宇，王强，张治民.基于凸模结构的内筋壳体旋转挤压成形折叠缺陷研究
［J］ .中北大学学报：自然科学版，2017，(2)：237-242.

Li T Y, Wang Q, Zhang Z M. Research on folding defects of inner ribbed shell based on punch structure
［J］. Journal of North University of China：Natural Science Edition, 2017, (2):237-242.

［12］雷煜东，王强，张治民，等.旋转挤压裂纹萌生趋势的数值模拟
［J］.塑性工程学报,2018,25(2):122-127.

Lei Y D, Wang Q, Zhang Z M, et al. Numerical simulation of crack initiation trends during rotating extrusion
［J］.Journal of Plastics Engineering, 2018, 25(2):122-127.

［13］陈喆,张宝红,李国俊,等.旋转挤压过程中凸模高径比和进给速度对成形精度的影响
［J］.锻压技术,2018,43(2):84-89.

Chen Z, Zhang B H, Li G J, et al. Influence of height-to-diameter ratio and loading speed of the punch on forming accuracy in the process of rotating extrusion
［J］.Forging & Stamping Technology, 2018,43(2):84-89.

［14］Xue Y, Zhang Z M, Wu Y J. A study on processing map and flow stress model of AZ80 magnesium alloy forming at elevated temperature
［J］. Applied Mechanics & Materials, 2011, 121-126: 3-9.

［15］庄楚强，何春雄. 应用数理统计基础
［M］.广州：华南理工大学出版社，2006.

Zhuang C Q, He C X . Apply Mathematical Statistics Basis
［M］. Guangzhou: South China University of Technology Press,2006.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】