Transactions of Materials and Heat Treatment

Title：Influence of tool speed on sheet temperature and formability of magnesium alloy AZ31B cone box in frictional heat incremental forming

Authors： Zhou Liuru Zheng Zhiqiang Luo Zhongmin

Unit： Nanchang University

KeyWords： incremental forming sheet metal form tool rotation speed frictional heating forming performace of magnesium alloy

ClassificationCode：TG381

year,vol(issue):pagenumber：2016,41(9):31-34

Abstract：

For the poor formability of magnesium alloys at room temperature, it was studied the

frictional heat incremental forming method for magnesium allog sheets from self frictional

heat instead of external heating to improve forming performance. The forming principle,

process plans and forming process were introduced, and the process plan was designed that a

circular conical cup magnesium alloy AZ31B with 2 mm thickness was formed with 45°

inclination angle and 60 mm height. Furthermore, the forming trajectory was designed, and then

incremental forming experiments were done by choosing tool rotational speeds 0-6000 r·min-1

and feed rates 1000-2000 mm·min-1. Experiment results show that forming height and feed rate

have little effect on forming performance, and the tool rotation speed has great influence on

the forming performance, thus, the faster the tool rotation speed is, the higher the

temperature is. But the forming is failed when the tool rotation speed is 0-1000 r·min-1 or

≧1500 r·min-1，while the forming is successful at 1000 r·min-1 ≤ω≤1500 r·min-1. The

forming performance is enhanced by frictional heat from tool rotation speed.

Funds：

国家自然科学基金资助项目（51465038）

周六如（1963－），男，博士，副教授

Reference：

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

［2］ Iseki H, Naganawa T. Vertical wall surface forming of rectangular shell using multistage incremental forming with spherical and cylindrical rollers[J]. Journal of

Materials Processing Technology,2002,130,657-662.

［3］ Hagan E, Jeswiet J. Analysis of surface roughness for parts formed by CNC incremental forming[J]. Journal of Engineering Manufacture,2004, 10: 1307-1312.

［4］ Zhang Q, Xiaoa F, Guoa H, et al. Warm negative incremental forming of magnesium alloy AZ31 sheet: New lubricating method[J]. Journal of Materials Processing Technology,2010,210, 323-329.

［5］ Duflou J R, Callebaut B, Verbert J, et al. Laser assisted incremental forming: Formability and accuracy improvement[J].CIRP Ann.,2007, 56(1): 273-276.

［6］ Duflou J R, Callebaut B, Verbert J, et al. Improved SPIF performance through dynamic local heating[J]. International Journal of Machine Tools & Manufacture,2008, 48(5):543-549.

［7］ Ambrogio G, Filice L, Manco G L. Warm incremental forming of magnesium alloy AZ31[J]. CIRP Ann.,2008, 57(1):257-260.

［8］ Salandro W A, Jones J J, Mcneal T A, et al. Formability of Al 5xxx sheet metals using pulsed current for various heat treatments[J]. Journal of Manufacturing Science and Engineering,2010, 132(5):1-11.

［9］ Hino R, Yoshida F, Nagaishi N, et al. Incremental sheet forming with local heating for lightweight hard-to-form material[J]. International Journal of Modern Physics B,2008, 22(31-32):6082-6087.

［10］范国强，高霖，刘鹏，等. TC4板料电辅助加热数控渐进成形工艺分析及优化[J]. 南京航空航天大学学报,2010,(4): 238-243.

Fan G Q, Gao L, Liu P, et al. Technology analysis and optimization for electric hot incremental forming of Ti-6Al-4V sheet[J]. Journal of Nanjing University of Aeronautics & Astronautics,2010, 42(2):238-243.

［11］Taleb Araghi B, Gttmann A, Bergweiler G, et al. Investigation on incremental sheet forming combined with laser heating and stretch forming for the production of lightweight structures[J]. Key Engineering Materials,2011, 473:919-928.

［12］Durante M, Formisano A, Langella A, et al. The influence of tool rotation on an incremental forming process[J]. Journal of Materials Processing Technology,2009, 209:4621-4626.

［13］Hamilton K, Jeswiet J. Single poin incremental forming at high feed rates and rotational speeds: Surface and structural consequences[J]. CIRP Ann.,2010, 59(1):311-314.

［14］Otsu M, Matsuo H, Matsuda M, et al. Friction stir incremental forming of aluminum alloy sheets[J]. Steel Research International,2010, 81(9):942-945.

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