tailieunhanh - Numerical simulation of the bulk forming process to manufacture coupling details from tube billet

This article presents the research on the forming process of the coupling details using numerical simulation and based on the obtained results, the suitable geometric size of tube billet for the forming operation in closed die can be determined. | Vietnam Journal of Science and Technology 55 (5) (2017 612-619 DOI: NUMERICAL SIMULATION OF THE BULK FORMING PROCESS TO MANUFACTURE COUPLING DETAILS FROM TUBE BILLET Phan Thi Ha Linh1, 2, *, Nguyen Dac Trung2 1 Faculty of Mechanical Engineering, Hung Yen University of Technology and Education, Dan Tien commune, Khoai Chau district, Hung Yen province 2 School of Mechanical Engineering, Hanoi University of Science and Technology, No 1, Dai Co Viet street, Hanoi * Email: halinhcokhi@ Received: 20 January 2017; Accepted for publication: 28 June 2017 ABSTRACT Currently, most coupling details in the actuators are made by traditional methods such as bulk forming from block billet and then metal cutting. Such manufacturing methods often lead to material wastes due to cutting a large amount of excess processing. To save material and improve production efficiency, tube billet would be selected for bulk forming. However, when tube billet is used for bulk forming, it should be carefully calculated to avoid instability and folding defects in workpiece. This article presents the research on the forming process of the coupling details using numerical simulation and based on the obtained results, the suitable geometric size of tube billet for the forming operation in closed die can be determined. Keywords: bulk forming, numerical simulation of forming process, coupling detail, defect in bulk formed product. 1. INTRODUCTION Coupling is a mechanical element used to connect details and transmit a rotary motion from a detail to another. It is also used to connect eccentric shafts due to their elastic deformation or incorrect assembly in production process. There is a variety of coupling. However, clutch coupling is commonly used in actuators (Figure 1). Because coupling must last great load, shock load and high torque moment while it is working, coupling is often made from high durability materials and not produced by casting method or metal