Study on methods to optimize laser-sharpening quality,efficiency and topography |
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| Affiliation: | 1. Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material, Hunan University of Science and Technology, Xiangtan 411201, China;2. College of Mechanical and Electrical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;1. Mechanical Engineering Department, Imperial College London, UK;2. AMME Department, University of Sydney, Australia;1. School of Mechanical Engineering, Qingdao University of Technology, 266520 Qingdao, China;2. Shanghai Jinzhao Energy Saving Technology Co. Ltd., 200436 Shanghai, China;1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;1. Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China;2. Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China;3. State Key Laboratory of Special Surface Protection Materials and Application Technology, Wuhan Research Institute of Materials Protection, Wuhan 430030, China |
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| 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. |
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| Keywords: | Pulsed fiber laser sharpening Bronze-bonded diamond grinding wheel Quality Efficiency Topography |
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