Cutting Performance of Tool with Continuous Lubrication at Tool-chip Interface

To improve lubricating effect and reduce cutting fluid, a new lubricating method was proposed and a new cutting tool was fabricated. A micro-channel connected tool rake face with hydraulic pressure system was fabricated to continuously supply cutting fluid to tool-chip interface. Cutting tests on cast iron were carried out with the new cutting tool and conventional tools. Results show that the cutting forces, the friction coefficient at the tool-chip interface, chip size, the wear area and the adhesive effect of the new tool were significantly reduced compared with those of the conventional tool. EDS analysis results and SEM micrograph of worn surface verified that more cutting fluid can enter into the inner of interface between chip and tool through the micro-channel than flood lubricating. So more area can form liquid film that can reduce cutting force and friction and promote anti-wear. This is the main mechanisms responsible. Although adhesion is reduced, adhesive wear is the main wear mechanism for the new cutting tool as same as conventional tool.