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为了研究青铜金刚石砂轮光纤激光辅助侧吹修锐效果,通过青铜结合剂轮,开展功率密度与去除深度以及烧蚀区域表面形貌关系的研究,利用超景深三维扫描显微镜对烧蚀结果进行观测。结果表明:激光功率密度是光纤激光修锐青铜金刚石砂轮的核心工艺参数,激光功率密度为5×107 W/cm2时,既保证较高结合剂材料去除效率,又可以获得微观形貌较为理想的青铜结合剂轮表面。采用优化的工艺参数开展了光纤激光修锐青铜金刚石砂轮的试验,借助SEM电镜扫描和超景深三维显微镜对添加侧吹气体前后金刚石磨粒形态和砂轮表面形貌进行观测。结果表明:辅助侧吹修锐,不仅能减少覆盖在金刚石磨粒表面的熔融物,而且能在一定程度上抑制石墨化的产生,金刚石磨粒凸出于结合剂表面适宜高度,砂轮表面形貌明显优于未添加侧吹气体时。
In order to study the laser-assisted side-blowing effect of bronze diamond grinding wheel, the relationship between power density and depth of removal and surface topography of the ablation area was studied by using bronze binder wheel. The ablation results were observed by using the depth of field 3D scanning microscope. The results show that the laser power density is the core process parameter of fiber laser repairing bronze diamond wheel. When the laser power density is 5 × 10 7 W / cm 2, the removal efficiency of the higher binder material is guaranteed and the microstructure is better. Bronze binder wheel surface. The experiment of fiber laser repairing of the bronze diamond wheel was carried out by using the optimized process parameters. The morphology of the diamond abrasive grains and the surface of the grinding wheel were observed by SEM and scanning electron microscopy. The results show that the auxiliary side blowing sharpening can not only reduce the melt covering the surface of the diamond abrasive grains, but also inhibit the graphitization to a certain extent. The diamond abrasive grains protrude from the suitable height of the bonding agent surface, the surface morphology of the grinding wheel Obviously better than when no side blown gas was added.