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전병철(B. C. Jeon),김지훈(J. H. Kim) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.5
According to the development of modern computers to store large amounts of data, development of the hard disk also tend to be parallel, as are prominent. However, these developments over the speed on the hard disk into many parts, still rely on cutting most of the processing is haneungeot. In order to solve these problems on your hard disk that connects the motor and the disk plate without cutting important components: the hub using cold forging process for manufacturing it was necessary to develop the material and cut wires to the supply of material on your hard disk by a cold forging process design and process simulation for the process was carried out.
연속적 강소성 가공을 위한 스프링 가압형 ECAP 설계
진영관(Y. G. Jin),전병철(B. C. Jeon),임용택(Y. T. Im) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
Severe plastic deformation processing by equal channel angular pressing (ECAP) has attracted noticeable attention because it is an effective technique to produce the ultrafine-grained materials with enhanced mechanical properties. In the present study, split dies combined with the principle of spring-loaded preform process were newly proposed to provide a solution for the inefficiency of ECAP process. The designed and constructed spring-loaded ECAP set-up was used to make the continuous process feasible. Experiments for a single pass of ECAP were carried out to process aluminum alloy AA6061 by using the multi-stage former at room temperature. Vickers microhardness test was applied to investigate strength increase in the specimen deformed by ECAP. The spring-loaded ECAP proposed might be beneficial in commercializing a continuous application of ECAP to produce a high strength part in industry.
최진화(J-H Choi),전병철(B-C Jeon),조명우(M-W Cho) 한국생산제조학회 2005 한국공작기계학회 추계학술대회논문집 Vol.2005 No.-
A feature-based inspection planning system for On-Machine Measurement (OMM) is proposed to inspect the complicated mechanical parts efficiently during machining or after machining. The inspection planning consists of Global Inspection Planning (GIP) and Local Inspection Planning (LIP). In the GIP stage of the proposed strategy, the system creates an optimum inspection sequence of the features in a part. In the LIP stage, the system generates inspection parameters such as the suitable number of measuring points, their locations, and the optimum probing paths for each feature. The results are simulated and analyzed to verify the effectiveness of the proposed methods.
10T급 고강도 냉간압조용 선조질강 제품의 신뢰성 평가
강대식(D. S. Kang),김지훈(J. H. Kim),전병철(B. C. Jeon) 한국소성가공학회 2011 한국소성가공학회 학술대회 논문집 Vol.2011 No.5
Development trend and current status were surveyed for pre-heat-treated hight strength cold heading quality wire and it"s forming technology for cylinder head bolt. Spheroidizing, quenching, and tempering heat treatments are eliminated by adapting the pre-heat-treated wire, which could reduce energy consumption and green house gas emission rate during produce parts requiring high strength. There are some challenging problems to expand application area such as enhancing forming tool life, and preventing delayed failure. Domestic research movement concerning the development and application of the new high strength cylinder bolt and reliability Assessment was introduced.