【作者】 黄玉娟；

【导师】 郑敏利；

【作者基本信息】 哈尔滨理工大学 ， 机械制造及其自动化， 2008， 硕士

【摘要】 高速切削技术具有高效率、高精度和高表面质量等无可比拟的优越性,广泛地应用于汽车、航空航天、模具等制造领域,取得了显著的技术经济效益。高速切削刀具及其相关技术直接决定了高速切削的效益、质量和安全,是推广和应用高速切削技术的基础。高速面铣刀是目前应用比较广泛的高效金属切削加工刀具,在高速、断续切削的条件下,离心力和动态切削力所产生的冲击和振动是影响刀具使用寿命、加工质量、生产效率和机床高速切削效能发挥的重要因素,有必要对高速面铣刀的动态特性及其减振机理进行深入探讨,以改善切削质量,提高加工效率。本文以已有的高速铣削机理、高速铣刀安全性要求和高速刀具技术研究成果为基础,采用系统动态设计技术对高速面铣刀进行研究,主要研究内容为:1.针对高速面铣刀切削加工过程特点,建立高速面铣刀动态切削模型和高速面铣刀动力学微分方程,为高速面铣刀动态特性的研究奠定了基础;2.通过对高速面铣刀切削加工时所受动态载荷的研究,进行了高速面铣刀在离心力和动态切削力作用下振动模型预报;3.以减小高速面铣刀离心力和动态切削力作用下刀具振动幅值为目标,以高速面铣刀的切削特点、加工特征和高速面铣刀的安全性要求为基础,进行切削铝合金的高速面铣刀产品开发设计;4.通过有限元分析技术,对所开发的高速面铣刀进行减振性能预报。进行高速面铣刀在离心力作用下的变形分析,使刀具结构合理。5.对高速面铣刀进行动平衡试验和切削性能试验,对高速面铣刀的动态切削性能进行评价。研究结果表明,控制刀具的不平衡量,提高刀具的动平衡品质等级,进行刀具齿距的合理设计,能显著减小高速面铣刀离心力和动态切削力作用下振动幅值,可使高速面铣刀具有良好的动态切削性能,该方法具有很好的实用性。更多还原

【Abstract】 High speed cutting technology has incomparable superiority, such as high efficiency, high precision and high surface quality; it has been widely used in automotive, aerospace, mold and other manufacturing fields and has made significant technical and economic benefits. High speed cutter and its related technology which directly determine the efficiency, quality and security of high speed cutting are the foundation of the promotion and application of high speed cutting technology.High speed face milling cutter is the widely used high efficiency metal cutting tool, under the high speed, intermittent cutting conditions, shock and vibration caused by centrifugal force and dynamic cutting force are important factors affecting tool life, machining quality, productivity and the machine effectiveness of the high speed cutting, it is necessary to explore the dynamic characteristics of the high speed face milling cutter and its vibration mechanism for improving cutting quality and increasing machining efficiency.Based on the existing high speed milling mechanism, high speed milling cutter security requirements and study of the high speed cutter technology, this paper researches on high speed face milling cutter using system dynamic design technology, its major study are as follows:1. For the machining features of the high speed face milling cutter, establishes dynamic cutting force model and kinetics differential equations of the high speed face milling cutter, laid the foundation for the research of high speed face milling cutter dynamic characteristics.2. Through the research on dynamic forces in the machining process of high speed face milling cutter, makes the vibration model prediction of the high speed face milling cutter when the centrifugal force and dynamic cutting force play roles.3. To reduce the vibration amplitude of the cutter under the force of centrifugal force and dynamic cutting force, based on the cutting characteristics of the high speed face milling cutter, machining features and its security requirements, develop and design the high speed face milling cutter used to high speed machining aluminum alloy.4. By finite element analysis technology, the performance of vibration reducing of the developed high speed face milling cutter has been predicted. Deformation of the high speed face milling cutter under the centrifugal force has been analyzed so that the structure of the cutter will be more reasonable.5. Evaluate the dynamic cutting performances of the high speed face milling cutter based on its dynamic balancing test and cutting performance test.The research shows that controlling the imbalance of the cutter, improving the balancing quality grade of the cutter, reasonable design of the tooth pitch, reducing the amplitude of the high speed face milling cutter under the role of dynamic cutting forces can make the cutter have good dynamic cutting performance, the method is practical.更多还原