Distribution of Radial Stresses in Deep Drawing Process
R. Uday Kumar
R.Uday Kumar, Associate Professor, Dept.of Mechanical Engineering, Mahatma Gandhi Institute of echnology, Gandipet, Hyderabad. 500075. Andhra Pradesh. India.
Manuscript received on April 11, 2013. | Revised Manuscript Received on April 12, 2013. | Manuscript published on April 25, 2013. | PP: 92-95 | Volume-1, Issue-6, April 2013. | Retrieval Number: F0281041613/2013©BEIESP
Open Access | Ethics and Policies | Cite
© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Deep drawing is one of the sheet metal forming processes; it is widely used in industry for making seamless shells, cups and boxes of various shapes. The Fluids are introduced in this area of deep drawing process is get higher in forming limits. In this the viscosity is maintained the major role in the hydro forming-deep drawing process. The Hydraulic pressure can enhance the capabilities of the basic deep drawing process for making metal cups and this hydraulic pressure contributes positively in several ways to the deep drawing process. In hydro assisted deep drawing process, applying the hydraulic pressure in radial direction on the periphery of the blank is obtained through the punch movement with in the fluid chamber. The fluid is taking place in the die cavity and punch chamber and these are connected with the bypass path provided in the die. The pressure is generated in fluid due to punch movement with in the fluid chamber and directed through the bypass path to blank periphery and is to reduce tensile stresses acting on the wall of the semi drawn blank. This fluid creates the fluid film on the upper and lower surfaces of the blank and subsequently reduces frictional resistance. During the process, the blank is taking at centre place in between blank holder and die surface with supporting of pressurized viscous fluid. In this process the radial stresses are produced in the blank due to punch force applied on it, the shear stresses acted by viscous fluid on the both sides of blank, so apply viscosity phenomenon to this analysis. The blank holder pressure is controlled by the radial pressure of fluid and these are equal for uniform deformation of blank to obtain required shape and also elimination of failure of blank in deformation. In this paper, the radial stresses are evaluated through caster oil medium for magnesium alloy using FEA and also the radial stress distribution of magnesium alloys and fluid pressure were studied.
Keywords: Deep Drawing Process, viscosity, radial Stress and fluid pressure.