Forward extrusion through steadily rotating conical dies. Part II: theoretical analysis |
| |
| Authors: | X Ma M R Barnett Y H Kim |
| |
| Affiliation: | a Cooperative Research Centre for Cast, Metals Manufacturing, School of Engineering and Technology, Deakin University, Geelong, Vic. 3217, Australia;b Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong;c ERC/NSDM, School of Mechanical Engineering, Pusan National University, Republic of Korea |
| |
| Abstract: | Forward extrusion of a cylindrical rod from a round billet was carried out through steadily rotating conical dies. Die rotation was shown to decrease the extrusion load and impose a twist shear strain into the partially extruded billet. The material twisting occurred both inside the container and inside the convergent die. However, not all the rotary work was transferred into shearing the bulk of the material, and this led to circumferential slippage at the rotating tool/material interface. The twisting degree on the outer surface of the material is quantified by a simple measurement technique. The influences of various process parameters on the extrusion load are also studied, including die semi-cone angle, die rotating speed and lubrication condition. |
| |
| Keywords: | Forward extrusion Rotating dies Load reduction Material twisting |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
