中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 25 No. 3 March 2015 |
（1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
2. Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education,
Taiyuan University of Technology, Taiyuan 030024, China）
Abstract:Based on the design of the multi-row sprocket with a new tooth profile, a cold semi-precision forging process for manufacturing 5052 aluminum alloy multi-row sprocket was presented. Through simulating the forging process of 5052 aluminum alloy sprocket billet with 3D rigid-viscoplastic FEM, both the distributions of flow velocity field in axial (UZ), radial (UR) and circumferential (Uθ) directions and the curves of velocity component in different deformation regions were respectively obtained. By comparison and analysis of the velocity varying curves, the velocity component relation conditions for filling the die cavity were clarified. It shows that when the die cavity is almost fully filled, the circumferential velocity Uθ increases sharply, implying that Uθ plays a key role in fully filling the die cavity.
Key words: multi-row sprocket; cold semi-precision forging; 5052 aluminum alloy; flow velocity field; 3D FEM
