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마멸에 기초한 비대칭 열간단조 금형수명 예측에 관한 유한요소 시뮬레이션
최창혁(Chang-Hyok Choi),정경빈(Kyung-Bin Jung),김용조(Yohng-Jo Kim) 한국기계가공학회 2013 한국기계가공학회지 Vol.12 No.4
The main cause of die failure in hot forging is wear. Die wear directly generates the gradual loss of part tolerances, thereby causing deterioration in the dimensional accuracy of a forged part. It is very important to estimate forging cycles, called as die life, at which the die should be repaired or replaced. In this study, in order to estimate the hot forging die life, the finite element simulation of wear on an asymmetric part like a ball joint socket used in vehicle was carried out based on Archard"s model. Finite element simulation results were compared with wear amounts of a used die that were measured using a contact stylus profilometer. The simulation results were in relatively good agreement with measurements obtained from the virtual die which was used by 7,000 forging cycles in a forging industry. Consequently, the die life in the hot forging of the ball joint socket was estimated by 10,500 forging cycles on the finisher die.