Global InformationMicroextrusion information
Microextrusion is a microforming extrusion process performed at the submillimeter range. Like extrusion, material is pushed through a die orifice, but the resulting product's cross section can fit through a 1mm square. Several microextrusion processes have been developed since microforming was envisioned in 1990.[1][2][3] Forward (ram and billet move in the same direction) and backward (ram and billet move in the opposite direction) microextrusion were first introduced, with forward rod-backward cup and double cup extrusion methods developing later.[2][4] Regardless of method, one of the greatest challenges of creating a successful microextrusion machine is the manufacture of the die and ram. "The small size of the die and ram, along with the stringent accuracy requirement, needs suitable manufacturing processes."[2] Additionally, as Fu and Chan pointed out in a 2013 state-of-the-art technology review, several issues must still be resolved before microextrusion and other microforming technologies can be implemented more widely, including deformation load and defects, forming system stability, mechanical properties, and other size-related effects on the crystallite (grain) structure and boundaries.[2][3]
- ^ Engel, U.; Eckstein, R. (2002). "Microforming - From Basic research to its realization". Journal of Materials Processing Technology. 125–126 (2002): 35–44. doi:10.1016/S0924-0136(02)00415-6.
- ^ a b c d Dixit, U.S.; Das, R. (2012). "Chapter 15: Microextrusion". In Jain, V.K. (ed.). Micromanufacturing Processes. CRC Press. pp. 263–282. ISBN 9781439852903.
- ^ a b Fu, M.W.; Chan, W.L. (2013). "A review on the state-of-the-art microforming technologies". International Journal of Advanced Manufacturing Technology. 67 (9): 2411–2437. doi:10.1007/s00170-012-4661-7.
- ^ Fu, M.W.; Chan, W.L. (2014). "Chapter 4: Microforming Processes". Micro-scaled Products Development via Microforming: Deformation Behaviours, Processes, Tooling and its Realization. Springer Science & Business Media. pp. 73–130. ISBN 9781447163268. Retrieved 19 March 2016.