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AISI 4140 시편의 미세단조 공정 충격력 및 표면 변형량 측정
정창호(Chang-ho Jung),홍민성(Min-Sung Hong),전용호(Youngho Jeon) 한국생산제조학회 2018 한국생산제조학회지 Vol.27 No.5
The micro-forging process improves the surface quality of the workpiece by micro tip impacting. In this study, the impact force is generated using a terfenol-D oscillator (ETREMA Product. lnc.), and it is measured when the actual impact is in action. The experimental results show that the amplitude of the force in the no-load state is approximately 325.6 N, and the impact force is 116.6 N and 118.6 N when the static load is changed. As the output of the oscillator was changed by energy loss and structural damping, the impact force was found to be as 29.1 N and 36.4 N, respectively. The impact test was performed on the AISI 4140 specimen under these conditions, and the deformation of the surface was measured and compared. Hence, the impact force measurement results obtained in this study can be used as an important parameter for the optimization of micro-forging process.