沥青路面铣刨机截齿的失效研究及结构设计

发布时间：2018-05-16 00:34

本文选题：铣刨机截齿 + ABAQUS　；参考：《湘潭大学》2017年硕士论文

【摘要】：路面冷铣刨机作为一种沥青路面的养护施工设备应用广泛,铣刨机截齿作为铣刨机的铣削执行部件,目前铣刨截齿的失效问题已经成为影响铣刨机施工质量和进度的一个关键因素。笔者在依托前人研究成果的基础上,探讨了截齿的磨损失效机理,在一定程度上改进了铣刨截齿的结构;以ABAQUS软件为工具对截齿的磨粒磨损过程以及单把截齿参数对铣削阻力的影响规律进行了研究,本文的主要研究内容如下:1.对铣刨机截齿进行简要分析,发现磨损是截齿失效的主要形式,并且发现截齿头参与铣削以及截齿存在偏磨情况;对铣刨机相关领域的研究现状进行了分析,并对现有研究中存在的问题进行了探讨。2.总结了铣刨截齿的失效方式;通过建立铣刨截齿的单颗粒磨粒磨损模型,得到了影响截齿磨损的主要因素是截齿的硬度、铣削阻力和截齿遇到的硬质颗粒的数目;并对铣刨截齿磨粒磨损过程进行了三维数值仿真分析,探讨了铣刨截齿的磨损机理。3.通过分析路面冷铣刨机的铣削过程,结合铣刨截齿铣削力学模型,对铣刨机截齿的受力进行了详细的分析。利用MATLAB软件计算出截齿的铣削阻力,得到铣刨机水平进给速度、铣刨鼓转速和安装截齿的角度对铣削阻力的影响规律。4.利用ABAQUS软件建立截齿铣削路面的有限元模型,以截齿的齿尖角和齿身夹角为变量进行多次铣削模拟仿真,得到了截齿参数对铣削阻力的影响规律。5.对现有的截齿进行分析,得知由于截齿头的硬度不够导致截齿磨损失效速度较快;讨论了分段式截齿的可行性,在此基础上设计了两种分段式截齿,通过比较分析得到两段式结构的截齿较为合理;通过对现有的截齿与刀座的连接方式进行分析,得知铣削废料较为容易进入刀座内而导致截齿在刀座内无法正常自转,从而使得截齿产生偏磨;改正现有结构的缺点,设计了一种截齿与刀座装配的新方法。
[Abstract]:Pavement cold milling machine is widely used as a kind of asphalt pavement maintenance construction equipment, and milling machine cutter is used as milling executive part of milling machine. At present, the failure of milling cutter has become a key factor affecting the construction quality and progress of milling machine. On the basis of previous research results, the author discusses the wear failure mechanism of gear cutting, and improves the structure of cutting gear to a certain extent. The abrasive wear process of cutter and the influence of single cutter parameters on milling resistance are studied with ABAQUS software. The main contents of this paper are as follows: 1. Through the brief analysis of the cutting of the milling machine, it is found that the wear is the main form of the cutter failure, and it is found that the cutter takes part in the milling and there is a partial wear of the cutter, and the research status in the related fields of the milling machine is analyzed. At the same time, the problems existing in the existing research are discussed. 2. 2. The failure mode of milling cutter is summarized, the single particle wear model is established, and the main factors affecting gear cutting are the hardness of cutter, milling resistance and the number of hard particles. Three dimensional numerical simulation analysis was carried out on the wear process of grinding cutter, and the wear mechanism of milling cutter was discussed. Based on the analysis of the milling process of the cold milling machine and the mechanical model of milling the cutter, the force of the cutter is analyzed in detail. The milling resistance of the cutter is calculated by using MATLAB software, and the influence law of the horizontal feed speed of the milling machine, the rotation speed of the milling drum and the angle of mounting the cutter on the milling resistance is obtained. The finite element model of cutter milling pavement is established by using ABAQUS software, and the simulation of multiple milling is carried out with the tooth angle and tooth body angle as variables, and the influence of cutter parameters on milling resistance is obtained. Based on the analysis of the existing cutters, it is found that the wear failure rate of the cutters is faster because the hardness of the cutters is not enough, and the feasibility of the segmented cutters is discussed, and on the basis of this, two kinds of segmented cutters are designed. Through comparison and analysis, it is found that the cutter of two-section structure is more reasonable, and through the analysis of the existing connection between the cutter and the cutter holder, it is known that the milling waste is easy to enter the tool holder, which results in the tooth cutting can not be rotated normally in the tool holder. A new method of assembly between cutter and tool holder is designed to correct the shortcomings of the existing structure.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U418.3

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