چكيده به لاتين
Today, special attention is paid to micro-scale parts, devices and systems, especially in the field of manufacturing processes. It is concluded that the forming processes are well suited to the demands for the production of micro-parts and micro-systems, since the most important advantages of forming processes are improvement of mechanical properties by maintaining the granularity and grain boundary structure.
In the present thesis, the fabrication of two different micro-scale products were considered: 1)Micro-tube with medical applications 2) Bipolar plates used in fuel cell batteries. For micro-tube fabrication, three factors of loading force, temperature and gas protection were examined. It was found the best result (min. diameter) can be achieved at loading force equal to 30% of the yield stress at the corresponding temperature. Increasing the temperature to 700°C and using a protective gas also would result the lowest diameter. Also, in the study for fabrication of bipolar plates, two processes of incremental forming method and rubber pad forming method were investigated. The second process was more successful and its effective variables were studied by DOE method. By investigating of the micro-channels formed in different experiment conditions, the effects of each variable were determined and the results were reported in detail. Finally, the fabrication of AISI 304 bipolar plate with average channel depth of 491 µm (STD13 µm).
Keywords: Micro parts, Forming, Micro-tube, Bipolar plates
