Tài liệu Xác định vận tốc dập tối ưu khi gia công kim loại tấm

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Light-weight, high strength, low density and extreme corrosion aspects must be almost guaranteed in a deep drawn product. However, due to those requirements, thinning and wrinkling and other defects will be increased also. Numerous elements such as blank-holder pressure, punch force, speed of punch, blank shape, thickness variation, surface-to-surface friction coefficient, material characteristic«LQIOXHQFHG WR the success of methods as well as the quality of the products. In addition, worldwide manufacturers keep getting the most goods done in less time. Indeed, the increasing of productivity should be also dealt because it proportionally relates to the stamping speed. This paper investigates the influence of punch velocity on deformation behavior of aluminum alloy 5052±H112. Finite Element Method was used to perform Nakajima test at several of punch velocities of specimen widths and monitor fluctuations in magnitude of von Mises stress, the major strain and minor strain. Forming Limit Curve (FLC) will be obtained. The results will be compared with experiment work. That will pave the way for appropriate adjustments for next tasks that lead to find out the optimal stamping speed in deep drawing for AA5052-H112. 7+Ҫ<+ѬӞ1*'Ү13*6 769lj&Ð1*+Ñ$ HV7+ĈӚ0,1+'lj1* /8Ұ19Ă17+Ҥ&6Ƭ Page vi LӠ, CAM ĈOAN 7{L[LQFDPÿRDQWҩWFҧFiFNӃWTXҧQJKLrQFӭXWUuQKEj\WURQJOXұQYăQ©Xác ÿӏQK tӕF ÿӝ dұS tӕL ѭu khi gia công kim loҥL tҩP» là do W{LWKӵFKLӋQGѭӟLVӵKѭӟQJGүQFӫD PGS. TS. 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