可转位波形刃铣削刀片的铣削机理及实验研究

发布时间：2018-01-20 15:07

本文关键词： 可转位铣刀片波形刃铣削力刀具磨损　出处：《华东理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：波形刃铣刀作为一种新型高效高性能刀具,具有铣削力小、耐磨损性能好、加工稳定性好、分屑效果好以及加工效率高等诸多优点,因此广泛应用于粗加工领域。由于波形刃结构的独特性和复杂性,国内对可转位后波形刃铣刀片的研究较少。本文以可转位后波形刃铣削刀片为研究对象,从铣削力、切屑形态、铣削振动和刀具磨损等方面对其铣削机理展开理论分析和实验研究。首先从理论上分析了波形刃铣刀片的铣削作用机理和受力特点,并建立了波形刃铣刀的铣削力数学模型和铣削加工动力学模型。其次研究了铣削参数对波形刃铣刀片铣削力和铣削振动的影响规律,获得了铣削力的经验模型。实验结果表明:1)铣削力和铣削振动位移随每齿进给量、轴向切深和径向切深的增大而增大,垂直于进给方向的振动随铣削速度的增大而减小;进给量对铣削力的影响最大,铣削速度对铣削力和进给方向振动的影响很小。2)在相同条件下,与直线刃铣刀片相比,波形刃铣刀片的铣削力减少了 10%～20%,且具有更好的加工稳定性;波形刃具有良好的分屑作用,其切屑为细小的鳞片状。最后对比研究了波形刃和直线刃铣刀片刀具磨损。实验结果表明:与单齿铣削相比,采用双齿铣削时,波形刃铣刀片的耐磨性能明显提高,且明显优于直线刃铣刀片。本论文的研究工作为结构复杂的可转位铣削刀片的开发和刀具性能的改善提供了一定的理论依据和指导。
[Abstract]:As a new type of high efficiency and high performance cutting tool, wavy edge milling cutter has many advantages, such as low milling force, good wear resistance, good machining stability, good chip separation effect and high machining efficiency. Therefore, it is widely used in rough machining field. Because of the unique and complexity of waveform edge structure, there is less research on indexable post-waveform edge milling cutter in China. In this paper, the indexable post-waveform edge milling blade is taken as the research object. Theoretical analysis and experimental study on milling mechanism are carried out from milling force, chip shape, milling vibration and tool wear. Firstly, the milling mechanism and mechanical characteristics of corrugated milling cutters are analyzed theoretically. The milling force mathematical model and milling dynamic model are established. Secondly, the effects of milling parameters on milling force and milling vibration of corrugated milling cutters are studied. The experimental results show that the milling force and milling vibration displacement increase with the increase of feed, axial and radial depth. The vibration perpendicular to the feed direction decreases with the increase of milling speed. The effect of feed rate on milling force is the biggest, and the effect of milling speed on milling force and feed direction vibration is very small. 2) under the same conditions, compared with linear edge milling cutters. The milling force of the corrugated edge milling cutter is reduced by 10% and 20%, and has better processing stability; The corrugated edge has a good chip separation effect, and the chip is small scale. Finally, the wear of the wavy edge and the linear edge milling cutters is compared. The experimental results show that: compared with the single-tooth milling, the double-tooth milling is used. The wear resistance of corrugated edge milling cutters is improved obviously. The research work in this paper provides some theoretical basis and guidance for the development of indexable milling blade with complex structure and the improvement of tool performance.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG714

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