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To improve the tool lubrication performance and reduce the use of cutting fluid as much as possible, a new type of tool with continuous lubrication on the tool-chip contact interface has been fabricated. The atomized cutting fluid can be directly delivered to the tool-chip contact interface through the inner microchannel. Experiments were conducted on the new lubrication method, dry cutting, and traditional MQL cutting of 45 steel. The three-dimensional cutting forces and the cutting temperatures were measured. The wear surface of the rake face was analyzed through SEM micromorphology and EDS element detection. The results showed that the main cutting force of the tool with continuous lubrication at the tool-chip interface decreased by 14.5% and 5.9% compared with the conventional tools of dry cutting and MQL cutting. Moreover, the friction coefficient decreased by 14.2% and 9.8%, the length of the tool-chip contact interface decreased by 35.4% and 19.1%, and the amount of cutting fluid was only 1/10 of that in MQL cutting. The new lubrication method had better cutting fluid penetration and lubrication film formation performance than the traditional MQL method on the tool-chip interface. Furthermore, the surface wear of the new lubrication method was significantly reduced, and the main wear form of the new lubrication method was adhesive wear. [ABSTRACT FROM AUTHOR]

In recent years, there has been a challenge: how to meet the requirements of cutting lubrication and use the least cutting fluid for environmental protection simultaneously. To resolve this problem, novel cutting tools with micro textures on the rake face for lubrication were proposed, which can directly transport the cutting fluid to the tool-chip contact interface by using a micro-pipe. Cutting tests were performed on AISI 1045 steel. Then, the cutting force, friction coefficient, tool-chip contact length as well as wear of tools were investigated. The results show that the novel tools with micro textures have better cutting performance than other tools, by using much less cutting fluid than traditional flood lubricating cutting. Especially for the TVT tool, it has the best comprehensive performance. The main lubricating mechanism is that the cutting fluids can be more widely distributed on the tool rake face by the micro textures. This leads to better lubrication and less adhesion of the rake face. [ABSTRACT FROM AUTHOR]