Sustainable machining utilizing vegetable oil based nanofluids

Abstract

Machining industry utilizes cutting fluids to increase the performance of the metal cutting process. However, several environmental and health issues limit their usage. Minimum Quantity Lubrication (MQL) with nano cutting fluids is proposed in this paper as a better option for sustainable machining. In the literature, nanofluids are formulated, characterized and tested for their basic properties and performance in different applications. Nanofluids have been found to provide superior thermal and friction reduction qualities depending upon the formulation and application. Combination of vegetable cutting fluids with nanoparticles applied in the form of MQL will provide major environmental benefits without sacrificing the machining performance.

Energy field-assisted high-speed dry milling green machining technology for difficult-to-machine metal materials

“…The heat of the cutting fluid is uneven, and local droplets can start boiling [23]. A large number of microbubbles are blocked by an oil film, resulting in an increase in the heat transfer resistance and a decrease in the heat exchange efficiency [24]. In addition, the extensive use of cutting fluid not only endangers the health of operators (cancer, asthma, and skin diseases) but also seriously pollutes the environment (air, soil, and water) and increases the economic cost of processing waste liquid and chips; the cost of cutting fluid from purchase to processing accounts for 16% to 30% of the total cost of manufacturing difficult-to-machine metal materials, which is much higher than the tool cost of only 7% [25][26][27][28][29].…”

“…Fig 24. Ultrasonic vibration-assisted milling (UVAM) principle and logic: (a) UVAM principle and device[159,160] and (b) logical structure of laser-assisted milling difficult-to-machine metal materials.…”