本文選題：葉序理論　切入點(diǎn)：電鍍工藝　出處：《沈陽(yáng)理工大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：傳統(tǒng)固結(jié)磨料砂輪和絕大多數(shù)電鍍砂輪的磨料在砂輪表面呈無(wú)規(guī)則排布,且無(wú)法實(shí)現(xiàn)磨粒的可人為控制,導(dǎo)致參與磨削的動(dòng)態(tài)有效磨粒數(shù)減少,并且砂輪表面的容屑空間難以控制,砂輪工作表面容易出現(xiàn)堵塞現(xiàn)象,從而導(dǎo)致磨削溫度和磨削力的升高,降低了砂輪的磨削性能。針對(duì)以上問(wèn)題,本文提出將自然界仿生學(xué)中的葉序理論應(yīng)用到電鍍砂輪的制造過(guò)程中,使磨粒在砂輪表面呈現(xiàn)有序化排布,這將對(duì)改善砂輪的磨削性能有著重要的意義。首先,本文對(duì)仿生學(xué)中的兩種葉序排布數(shù)學(xué)模型(H.Vogel數(shù)學(xué)模型和Van Iterson數(shù)學(xué)模型)進(jìn)行分析,研究了上述兩種模型中的葉序系數(shù)、發(fā)散角、磨粒半徑對(duì)磨粒排布的影響,通過(guò)對(duì)影響結(jié)果的分析,選取最優(yōu)參數(shù)對(duì)端面葉序排布砂輪和外圓葉序排布砂輪進(jìn)行設(shè)計(jì)。重點(diǎn)分析了單顆磨粒葉序排布端面電鍍砂輪的制造工藝及操作規(guī)范,并提出了一種制造磨粒族葉序排布外圓砂輪的新方法,即采用電解蝕刻法在外圓柱面上蝕刻出按不同葉序排布的凸臺(tái),在此凸臺(tái)上進(jìn)行電鍍上砂,最終制造出了滿(mǎn)足實(shí)驗(yàn)加工要求的葉序排布電鍍砂輪。然后,對(duì)電鍍砂輪表面磨粒的等高性的影響因素進(jìn)行定性分析,并提出了改善砂輪表面磨粒等高性的方法,如對(duì)砂輪表面磨粒的擠壓、基于微復(fù)制技術(shù)的制造方法和磨粒的篩選等,重點(diǎn)對(duì)磨粒篩選的原理、篩選工藝過(guò)程以及磨粒篩選結(jié)果進(jìn)行分析,并選擇篩選出的部分磨粒進(jìn)行了等高性砂輪的制造。最后,對(duì)端面單顆磨粒葉序排布砂輪和外圓磨粒族葉序排布砂輪進(jìn)行磨削性能實(shí)驗(yàn),通過(guò)對(duì)端面砂輪表面磨粒磨損的測(cè)量和分析,得出了不同端面砂輪表面磨粒磨損量的關(guān)系,結(jié)果表明:端面等高性葉序排布砂輪的磨損量小于其他端面砂輪的磨損量;在單一因素條件下(砂輪速度ns、工件進(jìn)給速度vw、磨削深度ap),分析了其對(duì)磨削試件的表面粗糙度、磨削溫度、磨削力的影響,同時(shí)分析了外圓磨粒族砂輪的葉序系數(shù)h、工件進(jìn)給速度vw、磨削深度ap對(duì)磨削試件表面粗糙度的影響,結(jié)果表明:葉序排布電鍍砂輪的磨削性能優(yōu)于其他排布的電鍍砂輪。
[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
【學(xué)位授予單位】：沈陽(yáng)理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TG743

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

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本文編號(hào)：1579736