Transactions of Materials and Heat Treatment

Title：Numerical simulation and experimental study on drawing process of cylindrical cup based on AFDEX

Authors： Qi Pengfei Liu Guihua Bian Yi Peng Chong Zhong Zhiping Ma Xiaohui Li Qian

Unit： Beijing Research Institute of Mechanical & Electrical Technology

KeyWords： cylindrical cup drawing process die-entrance taper downflow default numerical simulation

ClassificationCode：TG316.3

year,vol(issue):pagenumber：2014,39(6):24-28

Abstract：

Upsetting，cupping and drawing are the most common processes for thick wall and deep hole cylindrical cup，and the forming of billet is very violent and unstable during drawing. The forming defects easily happen, including downflow, decentration, surface scratch phenomenon and etc., so drawing is the key process to hot stamping of thick wall and deep hole cylindrical cup. Drawing process with one bottom die and two bottom dies were researched based on theoretical analysis, numerical simulation and process experiment. The results show that the tensile stress value of billet is the maximum in the cross-sectional Ⅱ-Ⅱof bottom die. When the die-entrance taper of die was 15°, the axial tensile stress value is the mininum, which is the most benifit for forming. The better lubrication condition between bottom die and billet, the worse one between top die and billet, and the more serious downflow phenomenon. When two-pass drawing was used, the diameters of bearing land of bottom die respectively are Φ47 and Φ44 mm, the distance between two dies is 105 mm, and formed parts whose average wall thickness difference is 0.82 mm are obtained.

Funds：

国家科技重大专项资助项目（2011ZX04001-051-03）

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