Optimization of Process Parameters for WEDM Processing SiCp/Al Based on Graphene Working Fluid
2025
Zhou Sun | Weining Lei | Linglei Kong | Yafeng He
In the process of machining an aluminum matrix silicon carbide (SiCp/Al) composite material using wire electric discharge machining (WEDM), the thermal conductivity and dielectric properties of working fluid, such as discharge medium and cool carrier, directly determine the material removal rate (MRR) and surface roughness (Ra). In this paper, graphene-working fluid is innovatively used as working medium to optimize the discharge process due to its high thermal conductivity and field emission characteristics. The single-factor experiments show that graphene can increase the MRR by 11.16% and decrease the Ra by 29.96% compared with traditional working fluids. In order to analyze the multi-parameter coupling effect, an L16 (44) orthogonal test is further designed, and the effects of the pulse width (Ton), duty cycle (DC), power tube number (PT), and wire speed (WS) on the MRR and Ra are determined using a signal-to-noise analysis. Based on a gray relational grade analysis, a multi-objective optimization model was established, and the priority of the MRR and Ra was determined using an AHP, and finally the optimal parameter combination (Ton = 22 &mu:s, DC = 1:4, PT = 3, WS = 2) was obtained.
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