Jo A Ra, Jeong Myeong Sik, Lee Sang Kon, Moon Young Hoon, Hwang Sun Kwang
Mechanical Components and Materials R&D Group, Korea Institute of Industrial Technology, Daegu 42994, Korea.
Department of Mechanical Engineering, Pusan National University, Busan 46241, Korea.
Materials (Basel). 2021 Jan 22;14(3):532. doi: 10.3390/ma14030532.
A multi-stage cold forging process was developed and complemented with finite element analysis (FEA) to manufacture a high-strength one-body input shaft with a long length body and no separate parts. FEA showed that the one-body input shaft was manufactured without any defects or fractures. Experiments, such as tensile, hardness, torsion, and fatigue tests, and microstructural characterization, were performed to compare the properties of the input shaft produced by the proposed method with those produced using the machining process. The ultimate tensile strength showed a 50% increase and the torque showed a 100 Nm increase, confirming that the input shaft manufactured using the proposed process is superior to that processed using the machining process. Thus, this study provides a proof-of-concept for the design and development of a multi-stage cold forging process to manufacture a one-body input shaft with improved mechanical properties and material recovery rate.
开发了一种多阶段冷锻工艺，并辅以有限元分析（FEA），以制造一种高强度一体式输入轴，该输入轴具有长身主体且无单独部件。有限元分析表明，一体式输入轴的制造没有任何缺陷或断裂。进行了拉伸、硬度、扭转和疲劳试验等实验以及微观结构表征，以比较所提出方法生产的输入轴与采用加工工艺生产的输入轴的性能。极限抗拉强度提高了50%，扭矩增加了100 Nm，证实了采用所提出工艺制造的输入轴优于采用加工工艺制造的输入轴。因此，本研究为设计和开发一种多阶段冷锻工艺提供了概念验证，该工艺可制造具有改善机械性能和材料回收率的一体式输入轴。
