Forming Simulation of the Extrusion Process by Rotating Extrusion Dies

회전압출다이를 이용한 압출가공에 관한 성형 해석

In the previous experimental study about extrusion of circular product with four helical fins, it was known that product with helical fins may not to be rotated during extruding with rotating extrusion dies in spite of using twisted dies. According to the results of experiments with Plasticin material, it was anticipated that the extrusion load could be reduced if rotating dies could be used, because it needs high pressure in order to twist billet and form fin shape on the surface of product in the case of using conventional fixed helical dies. So, in this paper, according to the extrusion load analyzed by DEFORM-3D software, optimal rotational velocity of rotating dies can be obtained, and the twisting, angle of product can be analyzed during extruding product with helical fins in the case of two types of rotating of dies. The results of analysis by DEFORM-3D show that the twisting angle of product can be controlled by twisted angle of extrusion helical dies and the rotational velocity of helical dies.