This study proposes a hot-cold complex forging process for e automobile engine mounting parts from existing cold rging process. Material properties evaluation, forming alysis, mold design and fabrication, and performance aluation for a good product were performed in order to oduce automobile engine mounting parts with a hot-cold rging technology. The results obtained through this study are mmarized as follows. ) It was possible to save the cost by reducing number of processes comprising hot forging, trimming, and cold sizing forging of the engine mounting parts, which otherwise produced through a total of nine processes. ) Compression load of material SM45C according to the compression height was checked through high temperature compression tests at 1,100 °C and 1,200 °C. ) Strain, stress, and temperature distribution according to the heating temperature were checked by performing a hot forging simulation, and formability of engine mounting parts was checked at 1,100 °C as well as at 1,200 °C to get a good product. ) Breakage of the engine mounting mold which otherwise might occur in the conventional cold forging process could be reduced by implementing the hot-cold complex forging technology, so that mold life was improved at least more than five times. REFERENCES Han, M. S., Cho, J. U., "Structural Analysis of Engine Mounting Bracket," Journal of the Korean Society of Manufacturing Technology Kỹ sư, Vol. 21, số 4, tr. 525 ~ 531, 2012. Park U. H., bài hát, Y. C., "tối ưu hóa của chiếc xe có động cơ lắp ráp Hệ thống sử dụng kỹ thuật DFSS (thiết kế cho 6 sigma)." Triều tiên Xã hội của tiếng ồn và rung động kỹ thuật, Vol. 20, No. 3, pp. 235 ~ 241, năm 2010. Park, S. S., Kim, B. M., Lee, J. M., "xử lý thiết kế của rèn cho Trống khớp nối với các thành phần bên trong răng,"các tạp chí của Triều tiên Xã hội kỹ thuật chính xác, quyển 22, số 2, tr. 30 ~ 37, 2005.
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