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자동변속기용 부품의 에너지 절감을 위한 최적 설계 연구
김선현(S. H. Kim),김태형(T. H. Kim),이학선(H. S. Lee),홍의창(E. C. Hong),이정환(J. H. Lee) 한국소성가공학회 2014 한국소성가공학회 학술대회 논문집 Vol.2014 No.10
Lots of the industrial world with high energy consumption are trying to reduce energy of manufacturing product. Energy saving is cost reduction. So it is absolutely necessary for profit improvement of selling cost. Turning process after hot forging in vehicle auto transmission part changed to turning after plate cold forging for the energy and cost saving in former research. So it got weight saving of forging part. Heat energy can be reduce from hot forging to plate cold forging and weight saving of forging part got the energy and cost saving as reduction of turning volume. This study suggest a effective way to reduce an input material in cold forging and volume of turning operation. Therefore, this study presents optimum design for energy saving of manufacturing product.
자동변속기용 고강도 소재의 경제성을 만족하는 최적 선삭 가공 조건 선정
김선현(S. H. Kim),김태형(T. H. Kim),이학선(H. S. Lee),홍의창(E. C. Hong),이정환(J. H. Lee) 한국소성가공학회 2014 한국소성가공학회 학술대회 논문집 Vol.2014 No.10
Most industries are required low manufacturing cost according to high competition recently. To get a low cost, manufacturing cost have to reduce more quickly and efficiently. But to get an optimum cutting condition, it highly tends to depend on a lot of test according to individual field experience. So it is necessary for change of the flexible cutting conditions in industrial site, because the society becomes high technology gradually. This study presents the selection of optimum cutting condition for high strength material used automotive transmission parts in turning and if selected minimum cutting force is satisfied an optimum manufacturing and tooling cost.
펀치&다이 클리어런스를 고려한 후판의 성형성 향상에 관한 연구
허영민(Y. M. Huh),정헌욱(H. U. Jung),차황환(H. H. Cha),홍의호(H. E. Hong),홍의창(E.C. Hong) 한국소성가공학회 2013 한국소성가공학회 학술대회 논문집 Vol.2013 No.10
Recently manufacturing field of Automobile has been requested cost reduction and long life, various studies have been developed by changing the forming method reducing cost with same quality level. The product in this paper is one of automobile auto-transmission parts changed forming method from hot forging to cold thick plate forming. The objective of this paper is a research work for the improvement of formability of thick plate considering the clearance between punch and die as clod thick plate forming. In order to find an optimized clearance between punch and die with a thick plate that is 6mm thickness based on S53C material, tensile test was carried out for the finite element analysis (FEA). The computational analysis and experiment were tested. They were compared each other with 3 cases; 5%, 10%, 15% clearance between punch and die. Thus, the best shear surface was shown at 5%, 10% clearance from the computational analysis and it was shown the same result from the experiment. However, it showed that the experiment shows damaged portions in both die and punch. In conclusion, the optimum condition for a good shear surface or protecting die is 13% clearance between punch and die. Moreover, it can expect that the percentage of the clearance can improve a die life.