Numerical Simulation of Closed-die Extrusion Process of Oil Drill Stem Joints
Oil drill stem joints are typically hollow shaft parts. Aiming at problems of oil drill stem joints in hot forging, a hot closed-die extrusion forming process of vertical two-way with horizontal parting die was proposed. Combined with floating die technology, the forming process of drill stem joints was simulated by using the finite element software DEFORM-3D. Metal flow law, forming force and clamping force were analyzed. Research results show that vertical extrusion forming process is feasible, which has significant advantages of shortening the process flow and reducing the forming load.