http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김동진(D. J. Kim),정덕진(D. J. Jeong),김병민(B. M. Kim),최재찬(J. C. Choi) 한국자동차공학회 1997 한국 자동차공학회논문집 Vol.5 No.4
The inner pulley is an automobile component used as air conditioner clutch assembly. In cold forging af inner pulley, the design requirements are to keep the same height of the inner rib and outer one, and to make uniform the hardness distribution in the forged product. In industry, the design of forging processes is performed based on experience -oriented technology, that is, designers experience and expensive trial and error. Using the rigid -plastic finite element simulations, we design the optimal process conditions, which has a preforming operation. Also the final product configuration of forging has to be designed again in view of metal flow involved in the operation, derived from the finite element simulations. The forged pulley is investigated by checking the hardness distribution and it is noted that the distribution has improved to be even and high enough for industrial application.<br/>
조창연(C. Y. CHO),박주성(Z. S. PARK),이종억(J. O. Lee),정덕진(D. J. JEONG) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.10
The plastic working process is a well-known molding method to produce products with good mechanical properties whilst reducing material loss and production time at the same time. Among those methods, the nosing process is commonly used for valves, tubes and ammunition which require high mechanical properties since it provides change in shape without additional mechanical process, minimum material loss during the post-process and superior properties. However, high manufacturing cost and time are required for the large-size tubes due to the multi-step nosing processes. In addition, there are some potential risks due to the buckling and property variation caused by the nosing process, too. Therefore, the shell nosing process is investigated and used in this study in order to resolve the problems described previously. Thus, we could obtain the process with lower cost and improved efficiency by means of the shell nosing process.