The invention provides a preparation method of a
cutting fluid for
metal processing. The preparation method comprises the following steps: firstly, mixing materials; then carrying out three-stage cooling; and finally, putting a formed mixture into a reaction kettle for a reaction. Compared with the preparation process of a traditional
cutting fluid, the preparation method of the
cutting fluid comprises the two extra steps of three-stage cooling and reaction in the reaction kettle;
graphene, hollow carbon nanospheres and
ceramic micro-
powder are subjected to three-stage cooling, a
mixed solution having undergone the three-stage cooled is put into the reaction kettle for the reaction, and under the combined action of three-stage cooling and the stirring reaction of the reaction kettle, uniform dispersion of the
graphene, the hollow carbon nanospheres and the
ceramic micro-
powder in the
cutting fluid can be promoted; and meanwhile, covalent bonds are formed among all the components of thecutting fluid, so the cooling and lubricating properties of the
cutting fluid are further improved, the feeding amount of a cutter can be increased,
machining precision and quality are improved, theservice life of the cutter is finally prolonged, the possibility of cutter breaking and blade breaking is greatly reduced, and production cost can be reduced.