In this research, the wire wear ratio (WWR), material removal rate (MRR) and surface roughness (SR) of cryogenic cooled near dry wire-cut electrical discharge machining (NDWEDM) is compared with the existing NDWEDM process. Cryogenic cooled and un-cooled molybdenum wires and Inconel 718 alloy have been used as the electrodes and work-material respectively. The novel experimental setup has been fabricated to mix the minimum amount of water with pressurized air as a dielectric fluid. The control variables such as Air pressure (P), Flow rate (F), Current (I), Pulse width (PW), and Pulse Interval (PI) are measured to conduct both NDWEDM experiments using the L27 Taguchi method. It was revealed from systematic studies that WWR of cryogenic cooled NDWEDM is reduced to 29%, MRR is increased to 15.6% and SR is reduced to 7.23% than existing NDWEDM due to an increase in electric conductivity and effective spark strengths by cryogenic cooled wire. It was revealed from SEM images that the macro crater in the existing NDWEDM and the micro crater of wire in the cryogenic NDWEDM process have been studied.

在这项研究中，将低温冷却近干线切割电火花加工 (NDWEDM) 的线磨损率 (WWR)、材料去除率 (MRR) 和表面粗糙度 (SR) 与现有的 NDWEDM 工艺进行了比较。低温冷却和未冷却的钼丝和 Inconel 718 合金分别用作电极和工作材料。新的实验装置已被制造为将最少量的水与作为介电流体的加压空气混合。测量空气压力 (P)、流量 (F)、电流 (I)、脉冲宽度 (PW) 和脉冲间隔 (PI) 等控制变量，以使用 L27 田口方法进行 NDWEDM 实验。系统研究表明，低温冷却NDWEDM的WWR降低到29%，MRR提高到15.6%，SR降低到7。由于低温冷却线提高了电导率和有效火花强度，因此比现有的 NDWEDM 高 23%。从 SEM 图像中可以看出，已经研究了现有 NDWEDM 中的宏观火山口和低温 NDWEDM 工艺中线材的微观火山口。