超声切割铝蜂窝试验研究
发布时间：2018-10-14 17:53
【摘要】：超声切割技术作为快速发展的加工工艺,越来越广泛地应用于复合材料的加工,尤其是以纸蜂窝材料为代表的弱刚度复合材料。开展了超声切割铝蜂窝试验研究,通过分析不同振幅、不同进给速度下的切割力、超声切割后蜂窝工件的宏观和微观形貌,验证了超声切割铝蜂窝的可行性和优势。试验结果显示,超声切割后蜂窝宏观结构无明显破坏,无明显毛刺毛边产生,提高超声振幅和进给速度可以改善蜂窝切割后微观表面形貌;刀具的超声振动可以显著减小切割力,且在相同进给速度下随着超声振幅的提高,切割力变小;在相同超声振幅下随着进给速度的提高,切割力变大,但变化幅度较小。通过对超声切割铝蜂窝过程的受力分析,讨论了超声振幅、进给速度的变化对切割力的影响规律,并与试验结果进行对比,从理论上分析了造成超声切割力规律性变化的内在原因。
[Abstract]:As a rapid development of processing technology, ultrasonic cutting technology is more and more widely used in the processing of composite materials, especially the weak stiffness composites represented by paper honeycomb materials. Ultrasonic cutting aluminum honeycomb experiments were carried out. The feasibility and advantages of ultrasonic cutting aluminum honeycomb were verified by analyzing the cutting force under different amplitudes and different feed speeds and the macroscopic and microscopic morphology of honeycomb workpiece after ultrasonic cutting. The experimental results show that there is no obvious damage to the macrostructure of honeycomb after ultrasonic cutting, and no obvious burr is produced. The microstructure of honeycomb can be improved by increasing the ultrasonic amplitude and feeding speed. The ultrasonic vibration of the cutting tool can significantly reduce the cutting force, and the cutting force decreases with the increase of the ultrasonic amplitude at the same feed speed, and the cutting force increases with the increase of the feed speed at the same ultrasonic amplitude, but the change is smaller. Through the stress analysis of ultrasonic cutting aluminum honeycomb, the influence of ultrasonic amplitude and feed velocity on the cutting force is discussed, and the results are compared with the experimental results. The internal causes of the change of ultrasonic cutting force are analyzed theoretically.
【作者单位】： 大连理工大学精密与特种加工教育部重点实验室;
【基金】：国家高技术研究发展计划(863计划,2015AA043402) 国家自然科学基金(51575085)资助项目
【分类号】：TG48
本文编号：2271192
[Abstract]:As a rapid development of processing technology, ultrasonic cutting technology is more and more widely used in the processing of composite materials, especially the weak stiffness composites represented by paper honeycomb materials. Ultrasonic cutting aluminum honeycomb experiments were carried out. The feasibility and advantages of ultrasonic cutting aluminum honeycomb were verified by analyzing the cutting force under different amplitudes and different feed speeds and the macroscopic and microscopic morphology of honeycomb workpiece after ultrasonic cutting. The experimental results show that there is no obvious damage to the macrostructure of honeycomb after ultrasonic cutting, and no obvious burr is produced. The microstructure of honeycomb can be improved by increasing the ultrasonic amplitude and feeding speed. The ultrasonic vibration of the cutting tool can significantly reduce the cutting force, and the cutting force decreases with the increase of the ultrasonic amplitude at the same feed speed, and the cutting force increases with the increase of the feed speed at the same ultrasonic amplitude, but the change is smaller. Through the stress analysis of ultrasonic cutting aluminum honeycomb, the influence of ultrasonic amplitude and feed velocity on the cutting force is discussed, and the results are compared with the experimental results. The internal causes of the change of ultrasonic cutting force are analyzed theoretically.
【作者单位】： 大连理工大学精密与特种加工教育部重点实验室;
【基金】：国家高技术研究发展计划(863计划,2015AA043402) 国家自然科学基金(51575085)资助项目
【分类号】：TG48
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