【作者】 郭卫华；

【导师】 谭光宇；

【作者基本信息】 哈尔滨理工大学 ， 机械设计及理论， 2008， 硕士

【摘要】 刀具质量的好坏是机械加工设备长期有效运行的决定性因素之一。传统的平前刀面铣刀片已越来越不能满足生产的需要,设计、开发一种铣削力小,铣削温度低的新型铣刀片势在必行。三维复杂槽型铣刀片具有逐步替代平前刀面铣刀片的趋势,但目前三维复杂槽型铣刀片的种类较少,并且其槽型也多由经验定型,研究方法有限。本论文以铣削试验为基础,结合元胞自动机理论、传热学理论、切削理论,建立了三维复杂槽型铣刀片前刀面不规则热源的元胞自动机算法;进行了铣刀片温度场的模拟仿真分析,得到了基于元胞自动机算法的铣刀片温度场。论文研究的内容如下:1.进行了铣削试验,采用红外热成像仪和压电式测力仪,实现对铣刀片的铣削力、铣削温度的同步测量;对不同的切削参数进行了正交试验,分析了各参数对铣削力、铣削温度的影响,为元胞自动机模型的建立提供试验数据。2.利用传热学理论、切削理论建立了铣刀片温度传递模型;依据傅立叶导热定律、差分理论,结合实验测量数据,推导了基于元胞自动机理论的铣刀片前刀面不规则热源的温度场模型。3.在VC++环境下,结合MATLAB混合编程,完成了基于元胞自动机理论的铣刀片前刀面不规则热源温度场模型的程序实现,建立了该模型的仿真系统。4.利用Origin软件对计算数据进行可视化显示,拟合出前刀面各时刻的温度分布图,对照试验采集到的温度值,结果能够达到期望的精度,验证了采用元胞自动机理论进行铣刀片温度场研究的可行性。更多还原

【Abstract】 Quality of tool is one of the decisive factors of machining equipment run long time and work well. Traditional flat rake milling insert has not been meeting with production requirement gradually. It is necessary that designed and developed a new type of tool with low milling force and temperature. It is a trend that flat rake milling insert is replaced by milling Insert with 3 dimension complex groove, but the type of milling Insert with 3 dimension complex groove is less at present, also the groove is determined by experience and it’s research method is limited. This thesis construct the CA algorithm of irregular gradient hot source on the anterior surface of milling insert with 3 dimension complex groove, which is based on the milling test, also combining with the Cellular Automata theory, heat transfer theory and cutting theory; then simulation analyse the temperature field distribution and achieve temperature field of milling insert based CA algorithm.The content of the thesis is show as below:1.Use infrared heat imaging apparatus and piezoelectric dynamometer apparatus make synchronous measure milling force and temperature come true in the milling test; do orthogonal test aim at variant cutting parameter, and analyse how do these parameters affect on milling force and temperature, this provided test data for CA model.2.This paper establish temperature transfer model of milling insert utilize heat transfer theory and cutting theory, According to the Fourier’s heat transfer conduction and the difference theory and combine with measured data, temperature field model of irregular gradient hot source on the anterior surface of milling insert based CA algorithm is deduced. 3.Under VC++ environment and combine with MATLAB mixed program, implement the temperature field program of irregular gradient hot source on the anterior surface of milling insert based CA algorithm, and built up emulate system model.4.Then the calculational datas were displayed visually utilize Origin software, fitting each moment’s temperature distribution of anterior surface of milling insert by using this software, compared with milling experiment data, the results received from this system can meet the expectated precision. The result of validate test prove that research temperature field of milling insert utilize CA algorithm is practicable.更多还原