膛线拉刀的受力分析和数值模拟

发布时间：2018-04-24 09:09

本文选题：膛线加工 + 拉削　；参考：《中北大学》2015年硕士论文

【摘要】：近年来生产高射程、高射击精度火炮是火炮制造技术发展的总体趋势，身管作为火炮最关键的构件，长径比大、材料硬度高、结构复杂都加大了身管的制造难度。其中膛线加工是身管制造中最重要的工艺步骤，膛线的表面质量对火炮使用寿命和打击目标精确度有着决定性影响，提高膛线制造工艺水平成为了研究现代火炮制造技术的主要课题。文章介绍了一种不同于现有技术的新型膛线拉削设备，并对该设备的工作的原理进行说明。根据金属切削刀具的设计理论，对拉线刀具的刀片和刀座进行了重新设计。针对膛线拉削的特殊加工要求，，提出了实际生产加工时，所使用的切削液和切削参数的选择标准。为了进一步对拉线刀具进行分析，使用Solidworks软件建立了拉线刀具的三维实体模型。之后，分析了膛线拉刀的受力情况，结合镗刀和拉刀的切削加工特点，建立了刀具简化后的力学模型。并且对刀具切削刃和刀具的几何角度也进行了理论分析，建立了相关的数学模型。论文采用有限元分析软件Derform-3D对膛线拉削过程进行了模拟，在对刀具和工件划分网格软件求解后，分析了工件和刀具的应力、应变情况。在改变单一切削参数的情况下，得出了不同的切削力数据。运用线性回归的方法，对数据进行了讨论，得出背吃刀量对膛线拉刀的切削力影响最大的结论。
[Abstract]:In recent years, the production of high range and high firing precision artillery is the general trend of the development of gun manufacturing technology. As the most important component of artillery, the barrel is more difficult to manufacture because of its high aspect ratio, high hardness of material and complicated structure. Rifling processing is the most important technological step in barrel manufacturing. The surface quality of the rifling has a decisive effect on the service life of the gun and the precision of the target. Improving the level of rifling manufacturing technology has become the main subject of modern artillery manufacturing technology. This paper introduces a new type of rifling broaching equipment, which is different from the prior art, and explains the working principle of the equipment. According to the design theory of metal cutting tool, the blade and tool holder of wire cutting tool are redesigned. According to the special processing requirements of rifling broaching, the selection standard of cutting fluid and cutting parameters used in actual production and processing is put forward. In order to further analyze the drawing wire cutting tool, the 3D solid model of the drawing wire cutter is established by using Solidworks software. After that, the force of the rifling broach is analyzed, and the simplified mechanical model of the cutting tool is established according to the cutting characteristics of the boring tool and the broach. The cutting edge and the geometric angle of the cutting tool are also analyzed theoretically, and the relevant mathematical models are established. In this paper, the process of rifling broaching is simulated by finite element analysis software Derform-3D. The stress and strain of workpiece and tool are analyzed after meshing the cutting tool and workpiece. Different cutting force data are obtained by changing a single cutting parameter. The linear regression method is used to discuss the data and the conclusion is drawn that the amount of the back feed has the greatest influence on the cutting force of the rifling broach.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TJ305;TG715

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