1. A study of the grinding performance of laser micro-structured coarse-grained diamond grinding wheels.
- Author
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Deng, Hui and He, Jie
- Subjects
- *
WORKPIECES , *GRINDING & polishing , *GRINDING wheels - Abstract
Considering the relatively poor surface and subsurface quality of workpieces that are ground by coarse-grained grinding wheels, the nanosecond ultraviolet laser micro-structuring of coarse-grained diamond grinding wheels and the grinding performance of micro-structured grinding wheels were investigated in this study. In addition, the effect of two processing sequences on the topographical characteristics of the grooves and the effect of the groove angle ( α) on the surface roughness ( R ) of the ground workpiece were explored. Furthermore, the surface quality of workpieces that were ground by micro-structured (V-shaped and W-shaped patterns) and non-structured diamond grinding wheels and the grinding ratio ( G) of the grinding wheels were comparatively analyzed. The results demonstrate the following: Compared with the grinding wheel that was subjected to micro-structuring followed by sharpening, the surface of the grinding wheel that was subjected to sharpening followed by micro-structuring had a more integral groove structure. Neither an overly large α nor an overly small α was favorable for improving the surface quality of the workpiece that was ground by a micro-structured grinding wheel. When α = 60°, the minimum R of the workpiece was attained. The R of the workpieces that were ground by the grinding wheel with a V-shaped pattern (grinding wheel A) was 17-31% less than the R of the workpieces that were ground by the non-structured grinding wheel (grinding wheel C). The R of the workpieces that were ground by the grinding wheel with a W-shaped pattern (grinding wheel B) was 32-41% less than the R of the workpieces that were ground by grinding wheel C. The grinding performance of the micro-structured grinding wheels was related not only to the geometric parameters of the grooves but also to the micro-structure pattern. The W-shaped pattern was superior to the V-shaped pattern in terms of cooling and chip removal. Grinding wheel A and grinding wheel B had similar abrasion resistance, which were 26% less and 23% less than the abrasion resistance of grinding wheel C, respectively. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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