磨粒叶序排布电镀砂轮制造中的若干研究

发布时间：2018-03-07 14:47

本文选题：叶序理论　切入点：电镀工艺　出处：《沈阳理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：传统固结磨料砂轮和绝大多数电镀砂轮的磨料在砂轮表面呈无规则排布,且无法实现磨粒的可人为控制,导致参与磨削的动态有效磨粒数减少,并且砂轮表面的容屑空间难以控制,砂轮工作表面容易出现堵塞现象,从而导致磨削温度和磨削力的升高,降低了砂轮的磨削性能。针对以上问题,本文提出将自然界仿生学中的叶序理论应用到电镀砂轮的制造过程中,使磨粒在砂轮表面呈现有序化排布,这将对改善砂轮的磨削性能有着重要的意义。首先,本文对仿生学中的两种叶序排布数学模型(H.Vogel数学模型和Van Iterson数学模型)进行分析,研究了上述两种模型中的叶序系数、发散角、磨粒半径对磨粒排布的影响,通过对影响结果的分析,选取最优参数对端面叶序排布砂轮和外圆叶序排布砂轮进行设计。重点分析了单颗磨粒叶序排布端面电镀砂轮的制造工艺及操作规范,并提出了一种制造磨粒族叶序排布外圆砂轮的新方法,即采用电解蚀刻法在外圆柱面上蚀刻出按不同叶序排布的凸台,在此凸台上进行电镀上砂,最终制造出了满足实验加工要求的叶序排布电镀砂轮。然后,对电镀砂轮表面磨粒的等高性的影响因素进行定性分析,并提出了改善砂轮表面磨粒等高性的方法,如对砂轮表面磨粒的挤压、基于微复制技术的制造方法和磨粒的筛选等,重点对磨粒筛选的原理、筛选工艺过程以及磨粒筛选结果进行分析,并选择筛选出的部分磨粒进行了等高性砂轮的制造。最后,对端面单颗磨粒叶序排布砂轮和外圆磨粒族叶序排布砂轮进行磨削性能实验,通过对端面砂轮表面磨粒磨损的测量和分析,得出了不同端面砂轮表面磨粒磨损量的关系,结果表明:端面等高性叶序排布砂轮的磨损量小于其他端面砂轮的磨损量;在单一因素条件下(砂轮速度ns、工件进给速度vw、磨削深度ap),分析了其对磨削试件的表面粗糙度、磨削温度、磨削力的影响,同时分析了外圆磨粒族砂轮的叶序系数h、工件进给速度vw、磨削深度ap对磨削试件表面粗糙度的影响,结果表明:叶序排布电镀砂轮的磨削性能优于其他排布的电镀砂轮。
[Abstract]:The abrasive of traditional consolidated abrasive wheel and most electroplated grinding wheel is arranged irregularly on the surface of grinding wheel, and can not realize the artificial control of abrasive particles, which results in the reduction of the number of dynamic effective abrasive particles participating in grinding. It is difficult to control the chip-bearing space on the grinding wheel surface, and the working surface of the grinding wheel is easily clogged, which leads to the increase of grinding temperature and grinding force, and reduces the grinding performance of the grinding wheel. In this paper, it is proposed that the theory of leaf sequence in nature bionics be applied to the manufacturing process of electroplated grinding wheel, so that the abrasive particles can be arranged in an ordered manner on the surface of the wheel, which will be of great significance to improve the grinding performance of the wheel. In this paper, two mathematical models of leaf sequence arrangement in bionics, H. Vogel mathematical model and Van Iterson mathematical model, are analyzed, and the effects of leaf order coefficient, divergence angle and abrasive particle radius on the distribution of abrasive particles are studied. Through the analysis of the influence results, the optimum parameters are selected to design the finishing wheel for the sequence arrangement of the end blade and the arranged wheel for the outer circular leaf. The manufacturing technology and operation standard of the electroplating wheel for the arrangement of the end surface of the single abrasive blade sequence are emphatically analyzed. In addition, a new method of manufacturing abrasive grain family leaf sequence arranged round grinding wheel is put forward, that is, electrolysis etching method is used to etch the convex table arranged according to different leaf sequence on the outer cylinder surface, and the sand is electroplated on this convex table. Finally, the electroplated grinding wheel is manufactured, which meets the requirements of experimental processing. Then, the influence factors of the surface abrasive height of the electroplated grinding wheel are analyzed qualitatively, and the methods to improve the surface abrasive height of the electroplated wheel are put forward. For example, extrusion of abrasive particles on the surface of grinding wheel, manufacturing method based on microcopy technology and selection of abrasive particles, etc., the principle, process and result of abrasive particle screening are emphatically analyzed. At last, the grinding performance experiments were carried out on the single abrasive grain arrangement grinding wheel and the outer circular abrasive grain family blade arrangement grinding wheel, which were selected and selected for the manufacture of the equal height grinding wheel. Based on the measurement and analysis of the abrasive wear on the surface of the end grinding wheel, the relationship between the abrasive grain wear on the surface of the different end grinding wheels is obtained. The results show that the wear amount of the end face equal height arrangement wheel is less than that of the other end grinding wheels. Under the condition of single factor (grinding wheel speed ns, workpiece feed speed vw, grinding depth app), the influence of grinding speed on surface roughness, grinding temperature and grinding force of grinding specimen is analyzed. At the same time, the influence of the blade order coefficient h, the feed speed of the workpiece and the grinding depth AP on the surface roughness of the grinding specimen is analyzed. The results show that the grinding performance of the electroplated grinding wheel arranged by the blade sequence is better than that of the electroplated grinding wheel arranged by other arrangement
【学位授予单位】：沈阳理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG743

【参考文献】