| NOMEX honeycomb core materials is made by human on the principle of hexagonal honeycomb structure of bees, because of its low density, light quality, high specific strength and stiffness, the stronger capability of the impact resistant, self-extinguishing and is widely applied in many fields such as aerospace and high-speed train. However, this kind of special structure and mechanical properties of honeycomb core materials showed poor performance, low efficiency and low tool life, causing quality problems, and even lead to parts scrap in the traditional machining process. So the high efficient and high quality machining technology of its application in many fields has very important significance.Ultrasonic assisted processing technology as a new processing technology, to overcome the disadvantages caused by the traditional processing technology and which can effectively reduce the cutting force and extend the service life of cutter and improve the quality of surface processing, has been widely used in the honeycomb material processing. Around the key technology research of the ultrasonic auxiliary cutting machining system in this paper, experimental platform which has been set up for the ultrasonic cutting honeycomb material, comparative study of different shape ultrasonic cutting straight blade cutting tool performance, determine appropriate straight blade cutting tool structure and the ultrasonic cutting experiments have been carried out to verify performance of straight blade cutter, the preliminary analysis of ultrasonic machining performance and the effect of straight blade cutter. In this paper the main research contents and research results are as follows:(1) According to the characteristics of honeycomb core materials and its processing requirements, combined with the requirements of the cutting tool material and strength for the ultrasonic vibration system, to develop special cutting tools for ultrasonic cutting the honeycomb core, through the theoretical and simulation analysis, combining with the experimental contrast two kinds of structure forms of cutting tool performance, analyzed the amplitude change of transversal tool and determined the appropriate cutters’structure.(2) As a research tool and the matching performance of ultrasonic vibration system, the ultrasonic cutting technology was studied further, need corresponding ultrasonic cutting experiment platform to implement the corresponding requirements. On the basis of predecessors’research, we have set up a stable performance and can meet the basic requirements of the experimental ultrasonic cutting experiment platform, platform are verified by the experimental debugging and after matching the overall performance of the ultrasonic system.(3) Perfect tool structure parameters on the basis of analysis of the simulation tool, change the cutting tool material, through the simulation and experiment, compare the different parameters of the cutting tool matching the change of the resonance frequency and the amplitude of the whole after ultrasonic system, at the same time amplitude change of transversal study tools. Using the development of ultrasonic vibration cutting system in ultrasonic machining experiment platform for ultrasonic machining honeycomb core material test, verify the actual cutting performance of different parameters of the cutting tool, under the same process parameters, analysis of different parameters of the cutting tool matching the effective length of cutting after ultrasonic system, and study different cutting tool length effect on machining accuracy and surface quality of workpiece. |
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