高速铣刀安全性跨尺度设计方法

发布时间：2018-06-13 22:15

本文选题：高速铣刀 + 安全性　；参考：《机械工程学报》2016年05期

【摘要】：高速、断续切削载荷作用下的铣刀,其内部不断积聚的能量会引起铣刀原子不可逆运动和宏观结构的改变,高速铣刀安全性具有跨尺度的关联特性。为了提高铣刀安全性,提出一种高速铣刀跨尺度设计方法。采用力连接的方法实现铣刀连续介质力学与分子动力学跨尺度关联,引入熵值法,定量描述铣刀介观安全性。构建铣刀安全性熵值模型,探究铣刀宏介观结构之间的关系,揭示铣刀宏介观安全性对铣刀直径、齿数、齿根结构、刀齿分布、刀片安装前角和铣刀原子群构型参数的响应特性。利用公理设计方法建立高速铣刀安全性跨尺度关联设计模型,并进行铣刀安全性试验验证。分析和试验结果表明,在铣刀高低熵值区内分别发生了属性和程度不同的原子不可逆运动,齿根结构和刀片安装前角对原子群构型具有显著性影响,利用高速铣刀跨尺度设计方法可以提高其安全性,从而为实现高速铣刀高效、可靠、稳定加工提供了保证。
[Abstract]:Under the action of high speed and intermittent cutting load, the accumulation of energy inside the milling cutter will cause the irreversible movement of the atom and the change of macroscopic structure. The safety of high speed milling cutter has the characteristics of cross-scale correlation. In order to improve the safety of milling cutters, a cross-scale design method for high-speed milling cutters is proposed. The method of force connection is used to realize the cross-scale correlation between the mechanics of continuous medium and molecular dynamics of milling cutter. The entropy method is introduced to quantitatively describe the mesoscopic safety of milling cutter. The safety entropy model of milling cutter is constructed, and the relationship between the mesoscopic structure of milling cutter and the mesoscopic structure of milling cutter is explored, and the relationship between the safety of milling cutter and the diameter, number of teeth, tooth root structure and tooth distribution of milling cutter is revealed. The response characteristics of the front angle of the blade and the atomic group configuration parameters of the milling cutter. The safety model of high speed milling cutter is established by axiomatic design method, and the safety of milling cutter is verified by experiments. The results of analysis and test show that the irreversible movement of atoms with different properties and degrees occurs in the range of high and low entropy of milling cutter, and the tooth root structure and the angle before the blade installation have a significant influence on the atomic group configuration. The safety of high speed milling cutter can be improved by using the method of cross scale design of high speed milling cutter, which provides a guarantee for the high efficiency, reliability and stability of machining of high speed milling cutter.
【作者单位】：哈尔滨理工大学高效切削及刀具国家地方联合工程实验室;
【基金】：国家自然科学基金资助项目(50975067)
【分类号】：TG714

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