INFLUENCE OF PUNCH ON BLANK HOLDER PRESSURE IN HYDROFORMING DEEP DRAWING PROCESS
| Author(s) | : | Dr.R.Uday Kumar, Dr.P.Ravinder Reddy, Dr.A.V.SitaRamaraju |
| Institution | : | Associate Professor, Dept.of Mechanical Engineering, Mahatma Gandhi Institute of Technology, Gandipet, Hyderabad. 500075. Telangana. India |
| Published In | : | Vol. 2, Issue 8 — August 2015 |
| Page No. | : | 60-64 |
| Domain | : | Engineering |
| Type | : | Research Paper |
| ISSN (Online) | : | 2348-4470 |
| ISSN (Print) | : | 2348-6406 |
The hydro formed components are used in the aerospace, automotive, marine and other industries. In hydroforming deep drawing process, applying the hydraulic pressure in radial direction on the periphery of the blank isobtained through the punch movement with in the fluid chamber. The fluid is taking place in the die cavity and punchchamber and these are connected with the bypass path provided in the die. The gap is provided between die surface andblank holder bottom surface for movement of pressurized fluid and blank in the process. The pressure is generated influid due to punch movement within the fluid chamber and directed through the bypass path to the blank periphery and isto reduce tensile stresses acting on the wall of the semi drawn blank. The fluid pressure is obtained through ANSYSFlotran CFD analysis software for castor oil. The evaluation of fluid pressure with changing the punch speed at constantpunch radius. The pressure of fluid is acting radially on surface of blank during the process. The radial pressure of fluidis controlled by the blank holder pressure. This pressure of fluid is used to evaluate the blank holding pressure. In thisprocess of hydro forming deep drawing the fluid pressure is equal to blank holder pressure is to be obtained. Thedeformation of blank is uniform to get a required shape and also it prevents the blank failure during deformation due tothese two pressures are being equal. The pressure of fluid and blank holder pressure depends on punch speed. The fluidpressure and blank holder pressure increases with increasing in the punch speed. The fluid pressure and blank holderpressures are the dominant parameter for failure and success of forming of cups from the cylindrical blanks. In thispaper the numerical studies are carried on the determination of fluid pressure, blank holder pressure through punch byvarying its punch speed at constant its radius in hydro forming deep drawing process.
Dr.R.Uday Kumar, Dr.P.Ravinder Reddy, Dr.A.V.SitaRamaraju, “INFLUENCE OF PUNCH ON BLANK HOLDER PRESSURE IN HYDROFORMING DEEP DRAWING PROCESS”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 2, Issue 8, pp. 60-64, August 2015.
