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Trans. Nonferrous Met. Soc. China 25(2015) 2308-2320 Prediction of crack location and propagation in stretch flanging process of aluminum alloy AA-5052 sheet using FEM simulation Y. DEWANG1, M. S... 2015 Abstract: The stretch flanging process is significantly affected by various geometrical, material and process parameters. The punch-die clearance and initial flange length are main parameters......
Hole flanging with ironing process of two-ply thick sheet metal HUANG Yuung-ming(黄永明) Department of Mechanical and Computer-Aided Engineering, St. John’s University, Taipei 25135, Taiwan, China... of circular plates leading to fracture of the lip in the hole-flanging process. They applied the plastic anisotropy of the Hill onto the plane stress condition to forecast the change in thickness along......
Process design for multi-stage stretch forming of aluminium alloy aircraft skin HE De-hua(何德华), LI Xiao-qiang(李小强), LI Dong-sheng(李东升), YANG Wei-jun(杨伟俊) School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China Received 8 September 2009; accepted 24 November 2009 Abstract: A process design approach for multi-stage stretch......
unloading the stretch force, while the residual stress in width direction is released during the stretching process. The study of residual stress elimination is beneficial for optimizing stretch rate... should be cut. So, the stretch process will involve residual stress elimination, sawing quantity and rolling yield. However, it is still not clear about the relationship between the stretch rate......
the aircraft aerodynamic configuration and requires high shape accuracy, which is mainly manufactured by stretch forming process in the aerospace industry[1]. Since aircraft surface is subjected... 2.1 Stretch wrap forming process Stretch wrap forming process is widely used to produce skins in practice, whose basic principle is illustrated in Fig.1. First, the sheet is tensed with a force of F1......
the dimension precision of bent part, the multi-pass RDB process that is very low efficiency is used in industrial production. Due to the weakness above, rotary stretch bending(RSB) has been developed... Numerical analysis of dimension precision of U-shaped aluminium profile rotary stretch bending YU Zhong-qi(于忠奇), LIN Zhong-qin(林忠钦) School of Mechanical Engineering, Shanghai Jiao Tong......
Theoretical analysis on springback of L-section extrusion in rotary stretch bending process YU Cheng-long, LI Xiao-qiang School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China Received 19 November 2010; accepted 4 March 2011 Abstract: The theoretical analysis of springback in rotary stretch bending process of L-section extrusion was studied. The models......
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Trans. Nonferrous Met. Soc. China 25(2015) 2285-2292 Mechanical properties, electrical conductivity and microstructure of CuCrZr alloys treated with thermal stretch process Bei ZHANG, Zhi-guo ZHANG... with the thermal stretch process at various temperatures from 100 to 300 °C. The results reveal that the thermal stretch process is successfully developed to manufacture the precipitation hardening CuCrZr alloys......
Algorithm design and application of novel GM-AGC based on mill stretch characteristic curveJI Ya-feng(姬亚锋), ZHANG Dian-hua(张殿华), CHEN Shu-zong(陈树宗), SUN Jie(孙杰), LI Xu(李旭), DI Hong-shuang(邸洪双)(State... of novel GM-AGC system based on mill stretch characteristic curve was proposed. The error existing in calculating strip thickness by spring equation were analyzed first. And then the mill stretch......
