深孔刮滚切削机理及刀具的结构优化设计

发布时间：2019-04-27 16:30

【摘要】：随着航空、航天、汽车制造、石油开采等领域的的迅速发展,对深孔件的需求量越来越多,而且对工件内孔的质量要求也越来越高,因此,高效的深孔刮滚加工工艺也备受关注。深孔刮滚切削是一种高效的深孔精加工工艺,采用深孔刮滚复合刀具对内孔进行一次加工成型,将以前的粗镗、半精镗、精镗、滚压等工序进行简化,大大节省了加工时间,提高了生产效率。例如油缸内孔精加工,在采用刮滚切削时与传统的珩磨机相比,不但相噪音低,并可大大节省劳动力成本,且加工精度高,加工后表面粗糙度可达到Ra0.05-0.4?m,表面硬度可提高一倍,增加油缸的使用寿命。这篇文章分主要对刮滚刀具的刮削和滚压两部分进行了分析。(1)通过ABAQUS有限元分析软件模拟二维切削过程,分析了切削机理及特点,并对各项参数做了分析。(2)得到四种不同刀具角度条件下切削残留面积的最大高度,并对粗糙峰某一界面在滚压中的塑性流动规律采用滑移线场法进行了研究,得到了理论最佳的表面光整效果,并得到了滚压表面光整效果与滚压力的关系公式。(3)通过ABAQUS软件,对滚压的各项参数进行了有限元模拟,得到了各项参数对滚压效果的影响。(4)最后对刮滚切削刀具提出了设计和优化的方法。并通过计算公式对滚柱的数量和尺寸的确定、对滚压前刮削刀具及滚压头的尺寸提供了设计依据。
[Abstract]:With the rapid development of aviation, spaceflight, automobile manufacturing, oil exploitation and other fields, the demand for deep-hole parts is increasing, and the quality requirements for inner holes of workpieces are also getting higher and higher. The high efficiency deep hole scrape rolling processing technology has also been paid close attention to. Deep hole scraping and rolling cutting is an efficient deep hole finishing process. The deep hole scraping and rolling composite tool is used to process the inner hole once, simplifying the previous rough boring, semi-fine boring, rolling and other processes, thus greatly saving the processing time. Improved production efficiency. For example, when scrape and roll cutting is used, compared with the traditional honing machine, it can not only reduce the phase noise, but also save the labor cost greatly, and the machining precision is high, and the surface roughness can reach Ra0.05-0.4?m, after machining. The surface hardness can be doubled and the service life of the cylinder will be increased. This paper is divided into two parts: scraping and rolling. (1) the two-dimensional cutting process is simulated by ABAQUS finite element analysis software, and the cutting mechanism and characteristics are analyzed. The parameters are analyzed. (2) the maximum height of the residual cutting area is obtained under the conditions of four different tool angles, and the plastic flow law of a certain interface of rough peak in rolling is studied by using slip line field method. The best theoretical surface finishing effect is obtained, and the formula of the relation between rolling surface finishing effect and rolling pressure is obtained. (3) the parameters of rolling are simulated by finite element method (FEM) through ABAQUS software. The influence of various parameters on rolling effect is obtained. (4) at last, the design and optimization method of scraping cutting tool is put forward. The calculation formula is used to determine the number and size of the roller, and the design basis is provided for the size of the scraping tool and the roller head before rolling.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG713

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