Effect of Coolant Supplied through Grinding Wheel on Residual Stress of Grinding Surface

Abstract

We explored the effect of supplying coolant from the inner side of a grinding wheel on the residual stress caused by grinding. Effect of depth of cut on grinding temperature and residual stress was also studied. Results clarified that grinding with an internal coolant supply induced a larger compressive residual stress compared to a conventional external grinding fluid supply when depth of cut was large. In addition, grinding temperature in the internal grinding fluid supply was lower than in the external grinding fluid supply, as measured by infrared thermograph camera. Findings suggested that large compressive residual stress was obtained in the case of the coolant supplied from the inner side of the grinding wheel because temperature was lower than external coolant supply.

A Study on Coolant Parameters in Internal Grinding of 9CrSi Steel

“…Although, using coolant can reduce the cutting heat significantly, the thermal problem in the internal grinding always is complex and there is no a complete solution [3][4][5][6][7]. Thus, there are many researches have been done to improve the efficiency of cooling process in cutting area to minimize surface roughness [7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Many authors have investigated different coolant materials or recipes [8][9][10].…”

“…Some studies have tried to improve the cooling-lubrication techniques [12]. However, most of published researches have been done to study and optimize the effect of cooling parameters on surface finish [13][14][15][16][17][18][19][20]. Because, the cooling parameters are not fixed for all internal cylindrical grinding processes.…”

Formation mechanism study on tooth surface of two gear finishing processes: combined theoretical and experimental approaches

“…Fergani [22] made a quantitative research on the effect of temperature distribution on the tooth surface residual stress. Nakatsuka [23] made a comparative experiment analysis between internal cooling and external cooling method of the grinding wheel, and found that the internal cooling method (coolant supplied through grinding wheel) had a higher tooth surface compressive residual stress than the other one. Nélias [24] built a thermal mechanical coupling residual stress prediction model in grinding process based on semi-analytical method and solved the transient contact problem along the grinding feeding direction, and the computation speed was greatly improved compared with the finite element method.…”