Modeling and Experimental Investigation of Pressure Field in the Grinding Zone with Nanoparticle Jet of MQL

Abstract

Solid nanoparticles were added in minimum quantity lubrication (MQL) fluid medium to make nanofluids, that is, after the mixing and atomization of nanoparticle, lubricants and high pressure gas, to inject solid nanoparticle in the grinding zone with the form of jet flow. The mathematical model of two-phase flow pressure field of grinding zone with nanoparticle jet flow of MQL was established, and the simulation study was conducted. The results show that pressures in the grinding zone increased with the acceleration of grinding wheel, sharply decreased with the increased minimum clearance, and increased with the acceleration of jet flow. At three spraying angles of nozzles, when the nozzle angle was 15 ∘ , the pressure of grinding zone along the speed of grinding wheel was larger than the rest two angles. On the experimental platform built by KP-36 precision grinder and nanoparticle jet flow feed way, CY3018 pressure sensor was used to test the regularities of pressure field variations. The impact of the speed of grinding wheel, the gap between workpiece and grinding wheel, jet flow velocity, and spraying angles of nozzles on the pressure field of grinding zone was explored. The experimental result was generally consistent with the theoretical simulation, which verified the accuracy of the theoretical analysis.

Application of the auxiliary wheel cleaning jet in the plunge cylindrical grinding with Minimum Quantity Lubrication technique under various flow rates

“…Regarding Li et al, 29 in accordance with the strengthened heat transfer theory, the heat transfer ability of the liquid and gas is significantly exceeded by the solid. In this sense, the coefficient of thermal conductivity of solid materials is higher than the fluid material by several orders of magnitude at room temperature.…”

Modeling and Simulation of the Single Grain Grinding Process of the Nano-Particle Jet Flow of Minimal Quantity Lubrication

“…In addition, the surface of the workpiece after grinding will have elastic recovery, leading to the finally formed surface generation curve higher than the actual interfered curve between the grinding wheel and the workpiece, as shown in Fig. (4) [12].…”

“…However, studies show that the limited cooling effect of *Address correspondence to this author at the School of Mechanical Engineering, Qingdao Technological University, 266033 Qingdao, China; Tel: +86-532-85071757; Fax: +86-532-85071286; E-mail: sy_lichanghe@163.com the high-pressure airflow can not satisfy the need for the enhanced heat transfer in the high-pressure grinding zone. In addition, the machining quality of the work pieces and the service life of the grinding wheel are significantly lower than those with the traditional pouring grinding, indicating that the MQL technology needs further improvement [10][11][12][13].…”

Investigation into Engineering Ceramics Grinding Mechanism and the Influential Factors of the Grinding Force

“…Their study pointed out that transverse crack is a major factor of material damaging, and derived that the relational expression between the grinding force of ceramics grinding and the material removal rate. Yao Chunyan et al [35][36][37] investigated on the regression analysis of artificial neural network and its application in the forecast of the grinding force. They introduced simple regression and multiple regression analysis methods based on artificial neural networks.…”