1. Study on methods to optimize laser-sharpening quality, efficiency and topography
- Author
-
Li Shichun, Deng Hui, and Zhaohui Deng
- Subjects
0209 industrial biotechnology ,Engineering drawing ,Materials science ,business.industry ,General Engineering ,Diamond grinding ,02 engineering and technology ,Grinding wheel ,Sharpening ,Chip ,Laser ,01 natural sciences ,law.invention ,010309 optics ,chemistry.chemical_compound ,020901 industrial engineering & automation ,Optics ,Quality (physics) ,chemistry ,law ,Fiber laser ,0103 physical sciences ,Silicon carbide ,business - Abstract
This paper aims to improve bond surface smoothness, sharpening quality and efficiency as well as control grain protrusion height. Systematic research was performed on pulsed fiber laser sharpening of a coarse-grained bronze-bonded diamond grinding wheel. The results show that bond surface smoothness is related to the laser spot overlap ratio Uc and the laser scan track overlap ratio Ul. In the range 10–70%, an increase in Uc and Ul improved the sharpened bond surface smoothness. Sharpening quality and efficiency are both related to laser power density Ip. In the range 2.115–6.344 × 107 W cm−2, an increase in Ip gradually improved sharpening efficiency, but the sharpening quality trend initially improved followed by a subsequent decline. The grain protrusion height is related to the laser scan cycles N. An excessively small N will result in an insufficient chip space such that the grinding wheel is likely blocked. Grains will likely fall off due to an insufficient holding force if N is excessively large. Compared with silicon carbide grinding wheel sharpening, a pulsed laser-sharpened grinding wheel exhibits less surface grain fall-off, better grain height uniformity, more chip space around the grain and superior grinding wheel surface topography.
- Published
- 2016