Transactions of Materials and Heat Treatment

Title：Experimental study on forming limit of variable angle incremental flanging for copper tube

Authors： Hou Xiaoli Li Yan Qiu Xu Xiao Xudong Yang Mingshun

Unit： Xi′an University of Technology

KeyWords： variable angle incremental flanging tube flanging T2 copper fracture forming limit curve

ClassificationCode：变角度；增量翻边成形；圆管翻边；T2紫铜；破裂；成形

year,vol(issue):pagenumber：2022,47(10):162-168

Abstract：

In incremental flanging of thin-walled circular tube components, tube material is prone to fracture, wrinkling and other defects, and the evolution of material deformation mechanism is complex and very sensitive to loading conditions, which makes it difficult to predict and control the fracture of tube material in the incremental flanging forming. Therefore, in order to solve this problem, for T2 copper, a variable angle incremental flanging experiment platform of metal tube was built, and the forming performance of tube material in the variable angle incremental flanging process was studied by experiments to realize the prediction and control of fracture. Then, the mesh data of part was measured and extracted by digital microscope, and the data were fitted by interpolation method. Furthermore, the strain loading path and the thinning conditions of deformation area of parts in the variable angle incremental flanging process were analyzed, and the forming limit curve (FLC) of T2 copper tube under the variable angle incremental flanging process was obtained. Finally, through the analysis and research of FLC, the strain distributions in the fracture and safety areas of circular tube flanging parts were obtained, and the prediction and control of part fracture were realized.

Funds：

国家自然科学基金资助项目(52075437,51905423)

侯晓莉（1979-）女，硕士，工程师，E-mail：xiaolihou@xaut.edu.cn

Reference：

[1]Jeswiet J, Micari F, Hirt G, et al. Asymmetric single point incremental forming of sheet metal [J]. CIRP Annals-Manufacturing Technology, 2005, 54(2):88-114.

[2]周六如.板料数控增量成形变形区厚度变化规律的研究[J].机械工程学报, 2011,47(18)：50-54.

Zhou L R. Research on the thickness change laws in numerical control incremental sheet forming [J]. Journal of Mechanical Engineering, 2011,47(18)：50-54.

[3]Bhattacharya A, Maneesh K, Reddy N V, et al. Formability and surface finish studies in single point incremental forming [J]. Journal of Manufacturing Science and Engineering, 2011, 133(6): 621-627.

[4]Li Y L, Liu Z B, Lu H B, et al. Experimental study and efficient prediction on forming forces in incremental sheet forming [J]. Advanced Materials Research, 2014, 939: 313-321.

[5]Becker C, Tekkaya A E，Kleiner M. Fundamentals of the incremental tube forming process [J]. CIRP Annals-Manufacturing Technology, 2014, 63(1):253-256.

[6]刘天聪. 翻边成形制件的常见缺陷及修正方法[J].模具技术，2000，(4)：70-73.

Liu T C. The common-flaws of the flange and correction measure [J]. Die and Mould Technology, 2000，(4)：70-73.

[7]Bagudanch I，Centeno G，Vallellano C, et al. Forming force in single point incremental forming under different bending conditions [J]. Procedia Engineering, 2013, 63: 354-360.

[8]贾俐俐, 高锦张, 王书鹏. 直壁筒形件多道次增量成形工艺研究[J].中国制造业信息化,2007,36(19)：133-135.

Jia L L, Gao J Z, Wang S P. Research on the multistage incremental forming of tube-like part[J]. Manufacturing Information Engineering of China, 2007,36(19)：133-135.

[9]李娟, 陈东升, 王辉，等. 2024铝合金异形孔渐进成形工艺研究[J].精密成形工程,2018,10(4)：55-60.

Li J, Chen D S, Wang H, et al. Research on incremental forming process of 2024 aluminum alloy with special shaped hole[J].Journal of Netshape Forming Engineering, 2018,10(4)：55-60.

[10]罗云华, 张祥林, 黄早文. 管材向内翻卷变形的力学分析[J].华中科技大学学报：自然科学版, 2005,33(12)：16-18.

Luo Y H, Zhang X L, Huang Z W. Mechanical analysis of the deformation produced by internal inversion on round tubes [J]. Journal of Huazhong University of Science and Technology：Natural Science Edition, 2005, 33(12):16-18.

[11]Wen T, Yang C, Zhang S, et al. Characterization of deformation behavior of thin-walled tubes during incremental forming: A study with selected examples [J]. International Journal of Advanced Manufacturing Technology, 2015, 78(9-12): 1769-1780.

[12]Wen T, Zheng J, Qing J, et al. Outwards and inwards crimping of tube ends by single-point incremental forming [J]. Procedia Engineering, 2017, 207:854-859.

[13]吴航,游建豪,周银,等. 管壁异形渐进翻孔成形的力与变形特征分析[J].锻压技术,2021,46(8):103-108.

Wu H，You J H，Zhou Y, et al. Analysis on force and deformation characteristics of incremental hole-flanging on tube wall with special shapes [J]. Forging & Stamping Technology, 2021, 46(8):103-108.

[14]张成兴.1060铝薄板超声振动单点增量成形极限研究[D].西安：西安理工大学，2017.

Zhang C X. Research on Forming Limit of Ultrasonic Vibration Single Point Incremental Forming of 1060 Aluminum Sheet[D]. Xi′an: Xi′an University of Technology, 2017.

[15]侯晓莉，李言，杨明顺，等. 铝板数控单点渐进成形的成形极限曲线研究[J].中国机械工程，2020,31(8):960-967.

Hou X L, Li Y, Yang M S, et al. Research on FLC in CNC single point incremental forming of aluminum sheets[J]. China Mechanical Engineering, 2020,31(8):960-967.

[16]邱旭，高新勤，侯晓莉，等. 金属管材变角度单点渐进翻边成形方法研究[J]. 机械科学与技术, 2022, 41(4): 566-572.

Qiu X, Gao X Q, Hou X L, et al. Research of forming method of variable angle single point in incremental flanging of metal tube[J]. Mechanical Science and Technology for Aerospace Engineering, 2022, 41(4): 566-572.

[17]曹晓卿，刘毅，王敬伟，等. AZ31镁合金薄板在热态下的成形极限图及其应用[J]. 稀有金属材料与工程，2013,42（3）：550-554.

Cao X Q, Liu Y, Wang J W, et al. Forming limit diagram and application of AZ31 magnesium alloy sheet at elevated temperatures[J]. Rare Metal Materials and Engineering，2013,42（3）：550-554.

Service：

【This site has not yet opened Download Service】【Add Favorite】