Study on machinability for laser-assisted machining of hydraulic carbon-graphite seal rings
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摘要: 为了实现液压碳石墨密封环的高效车削加工,采用激光辅助加工方法,进行了碳石墨密封环材料的激光辅助车削加工研究.考虑到碳石墨密封环材料具有高强度、高硬度等特点,利用激光束对工件进行局部加热,以提高加工效率、减小切削力和刀具磨损.针对碳石墨M104密封环的车削加工过程,进行了常规切削和激光辅助切削的对比实验研究.设计了激光辅助加工的实验流程,并进行了工艺参量的合理选择,得到了较高的切削效率.结果表明,激光辅助切削的主切削力和径向力分别比常规切削下降了23.5%和19.9%;激光辅助切削的切削区温度分布与常规切削相近;刀具磨损和破损的程度较小,能获得较好的表面加工质量.Abstract: To perform high efficient turning of hydraulic carbon-graphite seal rings,the laser-assisted machining of the material of carbon-graphite seal ring was conducted using laser pre-heating.The material of carbon-graphite seal rings has the characteristics of high strength and high hardness,and is typical non-metallic difficult-to-machine material.The laser-assisted machining heats the workpiece using laser beam,improving machining efficiency as well as reducing cutting force and tool wear.The turning process of carbon-graphite M104 seal ring was focused on,and the conventional machining was compared with the laser-assisted machining.The experimental process of laser-assisted machining was designed and reasonable process parameters were selected.A high cutting efficiency was obtained.The main cutting force and radial force decreased by 23.5% and 19.9% compared with conventional machining.The temperature distribution in the cutting zone of laser-assisted machining is similar to conventional machining.The laser-assisted machining has less tool wear and can get a better surface quality.
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