In order to improve the cutting performance in broaching, the lubrication and cleaning effects offered by water-based cutting fluids with green additives need to be studied from the viewpoint of green manufacturing. Therefore, water-based solutions with castor oil, surfactant (linear alkylbenzene sulfonate, LAS), and nanographite were prepared by ultrasonic agitation and sprayed into the zone of broaching via atomization. The performances of the cutting fluids, in terms of the viscosity, specific heat, wetting angle, and droplet size, were evaluated to discuss their effects on the broaching load. Among the fluids, the addition of LAS into oil-in-water (WO-S), where its cutting fluid with 10 wt.% castor oil and 1.5 wt.% surfactant, exhibited the lowest broaching force. With regard to the lubricating and cleaning mechanisms, WO-S has good wettability and permeability, and hence, can lubricate the cutting edge of the tool to decrease the cutting load, cool the cutting edge to keep it sturdy, and clean the surface of the cutting edge to keep it sharp. The results reveal that the simultaneous addition of castor oil and LAS had remarkable effects on the lubrication and cleaning, and resulted in a broaching load reduction of more than 10% compared to commercial cutting fluids. However, the addition of nanographite could not improve the lubrication owing to its agglomeration.

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评估拉削中含绿色添加剂的水性切削液

为了改善拉削中的切削性能，需要从绿色制造的角度研究具有绿色添加剂的水基切削液提供的润滑和清洁效果。因此，通过超声搅拌制备了具有蓖麻油，表面活性剂（直链烷基苯磺酸盐，LAS）和纳米石墨的水性溶液，并通过雾化将其喷涂到拉削区域中。评估了切削液在粘度，比热，润湿角和液滴尺寸方面的性能，以讨论其对拉削负荷的影响。在这些流体中，将LAS添加到水包油（WO-S）中时，其切削液中含10％（重量）的蓖麻油和1.5％（重量）的表面活性剂，其拉削力最低。关于润滑和清洁机制，WO-S具有良好的润湿性和渗透性，因此可以润滑工具的切削刃以减少切削负荷，冷却切削刃以保持坚固，并清洁切削刃的表面以保持锋利。结果表明，蓖麻油和LAS的同时添加对润滑和清洁效果显着，与商用切削液相比，拉削载荷降低了10％以上。然而，由于纳米石墨的团聚，其添加不能改善润滑性。结果表明，蓖麻油和LAS的同时添加对润滑和清洁效果显着，与商用切削液相比，拉削载荷降低了10％以上。然而，由于纳米石墨的团聚，其添加不能改善润滑性。结果表明，蓖麻油和LAS的同时添加对润滑和清洁效果显着，与商用切削液相比，拉削载荷降低了10％以上。然而，由于纳米石墨的团聚，其添加不能改善润滑性。