In addition to good coating cutting fluid, thermal current loop is cut off and the new process.

As is known to all, because the chip deformation and friction in metal cutting process, the cutting area has a high temperature, due to the different cutting tool and workpiece materials at the same time, form the poles of thermocouple thermoelectric emfs, dc thermal flow. Thermal current easily enhancing tool work surface oxidation process, speed up the tool wear. Under certain conditions, the cutting tool and machine tool, workpiece and machine tool in the contact zone, and in the contact region between the friction pair of machine itself also can produce thermoelectric emfs - hot current. Cutting heat is produced during the process of magnetic and electromagnetic effects, and high temperature in contact zone surface will produce electron emission - discharge phenomenon.

Technology at home and abroad in recent years, researchers study shows that the heat produced in the cutting process of current, and other factors caused by the thermal currents, the two heat current is formed by machine tools, cutting tool, workpiece, system circuits. At the same time there are local hot current loop in a cutting tool, workpiece with limited contact area, therefore, adds to the tool wear. So, improve tool cutting performance and increase tool life apart from the above basic way, also workable in a new way - that is, with improved thermal current effect of tool wear, namely thermal current loop is cut off to take.

Cutting method of thermal current loop is very simple, even if the cutting tool and machine tool or workpiece and machine tool insulation, heat current through cutting area cannot forming circuit, so that it can reduce the affinity between metal, reduce the devolop lump and the production of flake's burr, and improve the cutting performance, cutting tool to improve the tool life and processing quality.

How to cut off heat current loop. For lathe work, each with a bakelite pads on the surface of the tool up and down board or plastic pad knife plate, tool rod up and down surface and side with a machine on the party head insulation; For millers, planer, if use flat cutting pliers clamping workpiece, between the jaw and the artifacts cushion rubber wood or rubber, to insulate the artifacts and flat nose pliers; Can be used for drilling and vertical milling cutter, drilling and plastic end milling cutter with high strength plastic handle, the handle and machine tool spindle hole insulation.

Thermal current loop is cut off by production practice has proved that especially suitable for the processing of high strength, high hardness and difficult to machining materials processing to show its effect, often can improve the tool life 1 ~ 2 times. Therefore, it is effective one of the most simple and most easy to implement method.