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Research on the embossment phenomenon of disc grinding by workpiece's removal rate

Sun Cong, Xiu Shichao, Li Qingliang, Wang Jingyu, Zhao Yu

Archives of Civil and Mechanical Engineering

2019

Vol. 19, no. 3

739--755

The disc grinding has become a widely used technology in the precision-manufacturing process for plate stainless steel. However, embossment phenomenon occurs on the ground workpiece's surface. Moreover, the workpiece's removal rate can be applied to measure the embossment. In most studies, the researches on the disc grinding technology mainly focus on the trajectory distributions, which might be not appropriate enough to capture the workpiece's removal rate. To this end, this paper has presented a multiple grits-discretized (MGD) model on the workpiece's removal rate to identify the formation mechanism of the embossment phenomenon. Meanwhile, the current model is established based on the grits' distributions, the grits' size and the kinematic multiple grits' trajectory. The theoretical prediction for the distribution of workpiece's removal rate shows a reasonable agreement with the experimental validation. It shows that the removal rate is non-uniformly distributed on the workpiece's surface, which results in the workpiece's embossment. Furthermore, the workpiece's removal rate is greatly affected by the speed ratio. Therefore, the proposed model is not only anticipated to be meaningful for improving the uniformity of the machined workpiece by adjusting the speed ratio, but also expected to be useful for enhancing the understanding on the disc grinding enterprises.

Kompleksowa identyfikacja współczynnika prędkości osiadania dla warunków jednej z kopalń GZW

Ścigała R.

Górnictwo i Geologia

2012

T. 7, z. 1

199-210

W artykule przedstawiono praktyczny przykład identyfikacji wartości współczynnika prędkości osiadania na podstawie wyników pomiarów geodezyjnych obniżeń według zaproponowanej przez autora metodyki [7], polegającej na jednoczesnym wyznaczaniu wartości tego parametru zarówno w przestrzeni współrzędnych geometrycznych, jak i współrzędnej czasowej. Prezentowany przykład oparto na wynikach pomiarów geodezyjnych z terenu jednej z kopalń GZW.

The practical example of determination of subsidence rate coefficient on the basis of geodetic measurements results has been presented in this paper. The presented example bases on the Author's proposal of parameter "c" identification methodology by simultaneous best fit searching in the space and time coordinates. In identification procedure, the geodetic measurements results were used from one of Upper Silesia Basin coal mines.