立式加工中心切削稳定性建模与分析

发布时间：2018-05-27 13:03

本文选题：铣削颤振 + 铣削力系数　；参考：《天津理工大学》2017年硕士论文

【摘要】：为了适应现代化制造业的发展需求,人们对机床加工性能要求也不断增加。而机床加工性能往往是由切削时发生颤振的条件所决定,机床颤振除了与机床本身的特性有关外,还与加工是所选取的切削参数有关。本文在再生型理论基础上,对机床加工稳定性进行研究,通过理论与试验结合的方法对二维、三维稳定域进行分析。本文主要内容和成果:(1)本文首先对国内外学者对颤振的研究进行简单了解、介绍,并提出目前颤振方面存在的研究缺陷,在目前的理论基础上进行下一步分析。(2)在理论基础上建立静态铣削力模型,并通过分析再生型颤振中切削厚度的变化建立对应动态铣削力模型。并建立对应铣削力系数辨识模型,为下文要进行的两个试验提供了理论知识。然后通过试验获取模型中所需的系数。(3)文章采用数值解析法进行二维计算并得到对应的稳定性lobe图。由于二维稳定性有时候不够全面,本文在二维基础上进行了三维稳定域的计算分析。(4)通过文献可知在大径向切深条件下,进给量对加工稳定性影响不大所以可以忽略不计;但是在小径向切深时,会造成比较明显的影响,对此建立铣削力系数和进给量的关系模型,通过试验去求解并验证。
[Abstract]:In order to meet the needs of the development of modern manufacturing industry, the requirements for machine tool processing performance are also increasing, and the machining performance of machine tools is often determined by the conditions of chatter during cutting. The chatter of the machine tool is related to the machining parameters, besides the characteristics of the machine tool itself. This paper is based on the regenerative theory. Study the machining stability of the machine tool, analyze the two-dimensional and three-dimensional stable domain through the combination of theory and experiment. The main contents and achievements of this paper are as follows: (1) first of all, this paper first gives a simple understanding of the research of flutter at home and abroad, introduces the research defects of the current chatter, and carries out the current theoretical basis. The next step analysis. (2) to establish the static milling force model on the basis of theory, and to establish the dynamic milling force model by analyzing the change of the thickness of the regenerative Chan Zhenzhong cutting, and establish the identification model of the corresponding milling force coefficient, which provides the theoretical knowledge for the two experiments to be carried out below. Then the coefficients needed in the model are obtained by the test. (3) the article uses the numerical analytic method to calculate and obtain the corresponding stability lobe diagram. Because the two-dimensional stability is sometimes not comprehensive enough, this paper carries out the calculation and analysis of the three-dimensional stable domain on the basis of two dimensions. (4) through the literature, we can see that under the condition of large radial depth, the influence of feed amount on the stability of machining is negligible. No, but when the diameter of the path is cut to the depth, it will have a more obvious effect. The relationship model of the milling force coefficient and the feed rate is established, which is solved and verified by the experiment.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG659

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