Study on the Technology of Electrical Discharge Machining Al-SiC_p Composites
|School||Xi'an University of Technology|
|Course||Mechanical Design and Theory|
|Keywords||Aluminum matrix composites EDM Crafts Processing efficiency Surface roughness|
Aluminum matrix composites based on aluminum alloy as the metal substrate was added enhanced phase , after a series of treatment processes , casting out of special materials . Aluminum matrix composites performance depends on the phase matrix alloy and enhanced features, content, distribution and so on . Compared with the matrix alloy , aluminum matrix composites have good physical and chemical properties, as a new material has a wide range of applications in the automotive, aerospace and other areas . Study of aluminum matrix composites processing technology, to explore the mechanism of processing , has great significance for the promotion of the application of this material . This thesis WEDM processing the main electrical parameters of pulse width , pulse peak current and servo voltage reinforcing phase SiC particles content of 5% and 10% of two aluminum matrix composites processing efficiency and surface roughness investigated. EDM copper and graphite as electrode experiments to study the influence of different electrode aluminum matrix composite material removal rate , and the EDM electrical parameters were optimized . Observed by the SEM method WEDM processing the sample surface morphology, structure , and the energy spectrum analysis , preliminary study of the electrical discharge machining aluminum matrix composites removal mechanism . The study results showed that : wire cutting experiments , reduce processing efficiency increases with the increase in pulse width is increased to a peak , decreased with the pulse and servo voltage increases , and increases with increasing peak current ; surface roughness with the pulse width and the peak current increases with the pulse and servo voltage increases and decreases ; different electrical parameters of the optimal combination of processing of different SiC particle content . The EDM experimental results show that the graphite electrode machining , the pulse width of 17μs pulse of 55μs - 95μs peak current of 50A , servo voltage of 75V , high material removal rate , the optimal processing parameters ; copper electrode machining , pulse width of 19μs-21μs, clock is 65ms at a peak current to 65A , servo voltage of 75V , the maximum material removal rate , the optimal parameters .