Thermal Analysis of 3J33 Grinding Under Minimum Quantity Lubrication Condition

With the increasing requirements of environmental protection, energy conservation, and low consumption, minimum quantity lubrication (MQL) technology has attracted people's attention. In the grinding process, the cooling performance of MQL has always been the focus. In this study, considering the influence of the grinding wheel speed, grinding fluid flow rate, and gas pressure on the useful flow rate, the MQL grinding cooling performance was studied and analyzed, and the MQL grinding heat transfer coefficient model, grinding energy partition model and grinding temperature calculation model were established. Grinding experiments were carried out with maraging steel 3J33 as the experimental object, of which the results verified the accuracy of the model. The error of temperature calculation model is 9.45%. The influence of different parameters on the surface processing quality of the workpiece was studied through experimental results. The results show that the grinding wheel speed and gas pressure have a more significant influence on the useful flow rate of the grinding fluid. The grinding fluid flow rate but significant impact on the surface quality of the workpiece.