Hydrodynamic deep drawing of double layered conical cups

详细信息    查看全文

• 作者：Alireza JALIL^a ; Mohammad HOSEINPOUR GOLLO^a ; ^{m.hoseinpour@srttu.edu" class="auth_mail" title="E-mail the corresponding author} ; M. Morad SHEIKHI^a ; S.M. Hossein SEYEDKASHI^b
• 关键词：hydrodynamic deep drawing ; radial pressure ; double layered sheet ; conical cup ; critical pressure
• 刊名：Transactions of Nonferrous Metals Society of China
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：26
• 期：1
• 页码：237-247
• 全文大小：3180 K

文摘

Hydrodynamic deep drawing assisted by radial pressure is an advanced sheet forming technology with great advantages such as higher drawing ratio, good surface quality and higher dimensional accuracy. In this process, both the bottom surface and the peripheral edge of sheets are under hydrodynamic pressure, so that the forming procedure is more uniform with low failure probability. Multi-layered sheets with complex geometries could be formed more easily with this technique compared with other traditional methods. Rupture is the main irrecoverable failure form in sheet forming processes. Prediction of rupture occurrence is of great importance for determining and optimizing the proper process parameters. In this research, a theoretical model was proposed to calculate the critical rupture pressure in production of double layered conical parts with hydrodynamic deep drawing process assisted by radial pressure. The effects of other process parameters on critical rupture pressure, such as punch tip radius, drawing ratio, coefficient of friction, sheet thickness and material properties were also discussed. The proposed model was compared with finite element simulation and validated by experiments on Al1050/St13 double layered sheets, where a good agreement was found with analytical results.