發(fā)布時間：2019-04-21 13:38

【摘要】：不銹鋼管由于具有強(qiáng)度高、耐腐蝕性強(qiáng)和耐熱性好等優(yōu)點(diǎn)，被廣泛地用作石油、化工、醫(yī)療、食品、輕工和機(jī)械儀器與儀表等工業(yè)輸送管道或機(jī)械結(jié)構(gòu)部件。然而，在不銹鋼管的實(shí)際生產(chǎn)過程中往往要經(jīng)過高溫固溶處理，這就使得在不銹鋼管的表面極易形成一層組織致密且堅(jiān)硬，并且與基體結(jié)合牢固的氧化皮[1]。正是由于氧化皮的存在，使得其在一些領(lǐng)域的應(yīng)用受到限制，如何快速、有效地去除不銹鋼管內(nèi)表面的氧化皮，同時提高其內(nèi)表面的質(zhì)量，對提高不銹鋼管的自身價值及拓寬其應(yīng)用領(lǐng)域都具有重大的實(shí)際意義。 磁力珩磨技術(shù)是一項(xiàng)充分結(jié)合了磁技術(shù)與珩磨技術(shù)各自優(yōu)點(diǎn)的內(nèi)表面光整加工新方法。它巧妙地借助于磁場之間的相互作用力來驅(qū)動磁性珩磨頭在不銹鋼管內(nèi)腔運(yùn)動，既可克服傳統(tǒng)加工對工件的運(yùn)動要求以及珩磨中珩磨桿剛度受限等問題，同時又能較好地發(fā)揮磨削的效率高以及加工后的工件表面質(zhì)量高等優(yōu)點(diǎn)。尤其，對于那些由于結(jié)構(gòu)的特殊性，在加工中難以運(yùn)動的不銹鋼管其內(nèi)表面氧化皮的去除難題可得到有效的解決。此外，對于其它一般長圓形管狀類零件的內(nèi)表面加工，它也將是一種非常行之有效的加工新方式。 本文以解決由于結(jié)構(gòu)的特殊性在加工過程中難以運(yùn)動的不銹鋼管內(nèi)表面氧化皮的去除難題為研究目的。在前期研究的基礎(chǔ)之上，針對在以往研究及試驗(yàn)中采用電磁定子式旋轉(zhuǎn)磁場發(fā)生器所出現(xiàn)的定子發(fā)熱嚴(yán)重的問題： 1)提出采用另外一種形式的旋轉(zhuǎn)磁場發(fā)生器(即永磁機(jī)械式)來驅(qū)動磁性珩磨頭旋轉(zhuǎn)，以解決電磁定子式定子發(fā)熱嚴(yán)重所導(dǎo)致的單次連續(xù)加工時間受限的問題。 2)為了對比兩者的實(shí)際加工效果，在原有設(shè)備的基礎(chǔ)上，設(shè)計(jì)并搭建了基于永磁機(jī)械式旋轉(zhuǎn)磁場發(fā)生器的磁力珩磨系統(tǒng)，并設(shè)計(jì)了與之配套的磁性珩磨頭。 3)借助磁場有限元分析軟件Ansoft，針對基于兩種不同形式磁場發(fā)生器下的磁力珩磨系統(tǒng)分別進(jìn)行了有限元建模與磁場分析，通過對分析結(jié)果與理論計(jì)算值的比較，驗(yàn)證了磁力珩磨加工的可行性。 4)圍繞兩種不同形式磁場發(fā)生器下的磁力珩磨系統(tǒng)分別進(jìn)行了磁力珩磨加工試驗(yàn)，并針對三種不同材料的珩磨油石，在兩種不同轉(zhuǎn)速以及是否有冷卻液等部分加工工藝參數(shù)進(jìn)行了探索。 試驗(yàn)結(jié)果顯示：采用永磁機(jī)械式旋轉(zhuǎn)磁場發(fā)生器下的磁力珩磨系統(tǒng)，能夠很好地避免電磁定子式發(fā)熱嚴(yán)重所導(dǎo)致的單次連續(xù)加工受限的問題，且由于其永磁磁極的位置徑向可調(diào)，不僅可適用于一定范圍內(nèi)不同直徑工件的加工，，而且工件在加工前后進(jìn)行裝卸時的操作性也更好。
[Abstract]:Stainless steel tubes are widely used as industrial transportation pipes or mechanical structural components such as petroleum, chemical, medical, food, light industrial and mechanical instruments and instruments because of their advantages of high strength, strong corrosion resistance and good heat resistance. However, in the actual production process of stainless steel pipe, high temperature solution treatment is often required, which makes it easy to form a dense and hard layer of oxide coating on the surface of stainless steel pipe, and the oxide scale is firmly bonded with the matrix [1]. It is because of the existence of oxide scale that its application in some fields is limited. How to quickly and effectively remove the oxide scale on the inside surface of stainless steel tube and improve the quality of its inner surface at the same time? It is of great practical significance to improve the value of stainless steel pipe and widen its application field. Magnetic honing technology is a new method of inner surface finishing, which combines the advantages of magnetic technology and honing technology. It skillfully drives the magnetic honing head to move in the inside cavity of stainless steel by means of the interaction force between magnetic fields. It can not only overcome the motion requirement of traditional machining to the workpiece, but also overcome the limited stiffness of honing rod in honing. At the same time, it can give full play to the advantages of high grinding efficiency and high surface quality of machined workpiece. Especially, the problem of removing the oxide scale on the inner surface of stainless steel tube, which is difficult to move in the machining, can be effectively solved due to the special structure of the stainless steel tube. In addition, it will be a very effective new way to process the inner surface of other general oblong tubular parts. The purpose of this paper is to solve the problem of removing the surface oxide scale of stainless steel tube, which is difficult to move in the process of machining due to the particularity of the structure. On the basis of previous research, In view of the serious problem of stator heating caused by electromagnetic stator rotating magnetic field generator used in previous researches and experiments: 1) another kind of rotating magnetic field generator (permanent magnet mechanical type) is put forward. Drive the magnetic honing head to rotate, In order to solve the problem of single continuous machining time limitation caused by the serious heating of stator of electromagnetic stator. 2) in order to compare the actual machining effect, the magnetic honing system based on the permanent magnet mechanical rotating magnetic field generator is designed and built on the basis of the original equipment, and the matching magnetic honing head is designed. 3) the finite element modeling and magnetic field analysis of the magnetic honing system based on two kinds of magnetic field generators are carried out with the help of the magnetic field finite element analysis software Ansoft, and the results are compared with the theoretical calculated values. The feasibility of magnetic honing is verified. 4) the honing test of magnetic honing system based on two different kinds of magnetic field generator is carried out, and the honing stone of three different materials is studied. The processing parameters of two kinds of different rotational speed and whether there is coolant and so on are explored. The experimental results show that the magnetic honing system based on the permanent magnet mechanical rotating magnetic field generator can avoid the limitation of single continuous machining caused by the serious heating of electromagnetic stator type. Because the position of permanent magnet pole is radial adjustable, it can not only be applied to the machining of workpieces with different diameters within a certain range, but also be operated better when the workpiece is loaded and unloaded before and after machining.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TG589

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