Development of a novel method for the backward extrusion |
| |
| Affiliation: | 1. Department of Aerospace and Mechanical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran;2. School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran 11155-4563, Iran;3. Young Researchers Club, Central Tehran Branch, Islamic Azad University, Tehran, Iran;1. Department of Materials Science, Harbin Institute of Technology, Harbin 150001, China;2. Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2V4, Canada;1. School of Mechanical Engineering Engineering, KIIT University, Bhubaneswar 751024, Odisha, India;2. Departmrnt of Manufacturing Engineering, National Institute of Foundry and Forge technology, Hatia, Ranchi 834003, India;1. School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran 11155-4563, Iran;2. Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;1. Department of Mechanical Engineering, Imperial College London, London, SW7 2AZ, UK;2. Department of Mechanical Engineering, University of Birmingham, Birmingham, B15 2TT, UK;1. Division of Materials Science and Chemical Engineering, Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan;2. Department of Mechanical Engineering, Toyohashi University of Technology, Toyohashi, Aichi 441-8580, Japan |
| |
| Abstract: | In this study, a new method of backward extrusion using small diameter billet is proposed. In this new process, the die setup consists of three main parts of the fix-punch, the moveable punch and the matrix. The fix-punch has been used to decrease the cross section of applied billet and finally reducing the total force of the process. To investigate the capability of this process, experimental and finite element (FE) methods were used. The results showed that the first advantageous of the new process is that the load is reduced to about less than a quarter in comparison with the conventional backward extrusion process. This higher reduction in the required force is due to reduce of the cross section of the initial billet. EF results showed that while needing lower loads, the applied plastic strain through the processed sample is about two times higher than that in the sample processed via conventional backward extrusion. This is the second advantageous of the process. Eventually, the most important advantages of the novel method of backward extrusion are the lower process force, imposing higher effective strain and a better strain homogeneity through the tube length. This new process is also very promising for producing ultra fine grained (UFG) samples because the higher level of shear strains. |
| |
| Keywords: | Backward extrusion Lower process load Plastic strain Strain homogeneity |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
