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While the current warm forming press systems are complicated to operate as they require the preliminary building of stroke and force profiles for the specific products using data acquisition modules and forming simulation softwares, the increased replacement of aluminum and plastics with magnesium for handheld electronic devices may well accelerate this process. Article: Magnesium is the lightest structural material offering very good damping characteristics, weldability and excellent shielding as to electro-magnetic interferance, and is unlimited in supply. It has been an excellent material for making portable electronic and telecommunication devices, and automotive and favourable wind equipment such as MD player casings, receiving set for cell phones, video cameras and notebook computers, automotive gear housings, car wheels and engine blocks. The most estate method to produce magnesium parts is by die calculation and thixomolding processes. However, these runner and gating processes provide a low material yield of only 30% for thin-wall milling and can only produce thin walls of betwixt and between 0.7mm to 1.2mm. If we can form magnesium parts from sheet metal just like metal stamping of steel and aluminum parts, we can commit think twice material yield of all but 80% and possibly safer operation due to the lower processing temperature. However, magnesium is known to be non-formable as it is very resistant to deformation due to its hexagonal close-packed structure. The only way is warm forming of magnesium as deformation of magnesium then 225 degrees Celsius will suit supplemental slip planes to change operative. Extensive process research in this area have resulted in a few warm forming hydraulic presses within call in the market for draw forming. Recently, research in warm draw forming of magnesium to make cell phone shell has successfully shown that 0.4mm thin walls can be discharged consistently. Metallographic tests of the radio have also demonstrated that there is zero porosity and increased rigidity.
While the current warm forming press systems are complicated to operate as they require the preliminary pile of stroke and force profiles for the specific products using data procurement modules and forming simulation softwares, the increased replacement of aluminum and plastics with magnesium for handheld electronic devices may well redouble this process. Progressive early adopters of this technology would have a first mover wisdom in the competitive global manufacturing industry. |
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