【摘要】：設(shè)備的可靠性、工作精度、壽命、性能等,均與軸承質(zhì)量的好壞關(guān)系密切。根據(jù)軸承性能要求和結(jié)構(gòu)特點(diǎn),以提高軸承滾柱的加工質(zhì)量為目的,突破現(xiàn)有老化的加工工藝,實(shí)現(xiàn)創(chuàng)新,進(jìn)而使軸承的性能和壽命有所提高,對(duì)軸承制造業(yè)具有很重要的意義。 紡織機(jī)械中使用到的紡錠軸承由于無(wú)內(nèi)圈,滾柱與錠子直接接觸,且軸承轉(zhuǎn)速較高(10000r/min),滾柱端面與錠子形成接觸滑動(dòng),引起滾柱端部的嚴(yán)重磨損;同時(shí)也形成錠子的磨損,所以倒圓小或無(wú)圓角,直接影響著軸承與錠子的壽命。針對(duì)現(xiàn)有生產(chǎn)工藝存在的問(wèn)題(倒圓小,加工時(shí)間長(zhǎng)),提出化學(xué)機(jī)械復(fù)合的方法對(duì)滾柱進(jìn)行倒圓角。采用本工藝,滾柱的倒角時(shí)間可縮短9倍。 本課題所研究的工藝主要是由兩個(gè)正交試驗(yàn)的對(duì)比組成。通過(guò)這兩組正交試驗(yàn)的對(duì)比,得出工藝的最佳配比:粉末研磨為120g,設(shè)備為離心研磨機(jī),磨料為棕剛玉斜圓柱體磨料(8mm×16mm),時(shí)間為8h,工件與磨料的容積比為1:4,水為2L。對(duì)圓角進(jìn)行測(cè)量,符合要求(要求0.25mm-0.5mm)。對(duì)加工后工件的表面粗糙度、硬度、微觀形貌,光澤度進(jìn)行對(duì)比分析,得出經(jīng)過(guò)本工藝加工的工件,優(yōu)于用振動(dòng)機(jī)、滾筒的加工。 本文研究了研磨劑、設(shè)備、磨料以及綜合因素對(duì)倒圓效果的影響。研究表明,粉末研磨劑在低于120g時(shí),滾柱表面的去除不是很明顯,并且滾柱表面呈黑色無(wú)光亮;當(dāng)粉末研磨劑的含量達(dá)到120g時(shí),可以獲得很好的加工效果,即圓角的生成較快,外圓的去除也較快。當(dāng)粉末研磨劑的含量超過(guò)120g時(shí),產(chǎn)生的氧化膜不能及時(shí)被溶解,影響了加工效率,所以圓角的加工時(shí)間將被延長(zhǎng)�；剞D(zhuǎn)式滾筒、離心機(jī)、振動(dòng)機(jī)在相同條件下進(jìn)實(shí)驗(yàn)對(duì)比,得出離心機(jī)的效率是最高;綜合因素的影響中對(duì)磨料的選擇做出分析,最終得出斜圓柱棕剛玉磨料(8×16)符合本工藝要求。
[Abstract]:The reliability, working precision, service life and performance of the equipment are closely related to the quality of bearing. According to the performance requirements and structural characteristics of bearings, the purpose of improving the processing quality of bearing roller is to break through the existing aging processing technology, to realize innovation, and then to improve the performance and life of bearings. It is of great significance to the bearing manufacturing industry. Because the spindle bearing used in textile machinery has no inner ring, the roller is in direct contact with the spindle, and the speed of the bearing is higher (10000r/min), the end surface of the roller and the spindle form contact sliding, which causes serious wear at the end of the roller. At the same time, spindle wear is also formed, so the reverse circle is small or not, which directly affects the life of bearings and spindles. In view of the problems existing in the existing production process (the reverse circle is small and the processing time is long), the chemical-mechanical compound method is put forward to reverse the round angle of the roller. With this process, the chamfering time of roller can be reduced by 9 times. The process studied in this paper is mainly composed of two orthogonal experiments. Through the comparison of the two groups of orthogonal experiments, the optimum ratio of the technology is obtained: the powder grinding is 120g, the equipment is a centrifugal grinder, the abrasive is 8mm 脳 16mm, the time is 8 h, the volume ratio of workpiece to abrasive is 1: 4, the ratio of workpiece to abrasive is 1: 4, and the ratio of workpiece to abrasive is 1: 4. Water is 2L. Measure the rounded corners to meet the requirements (0.25mm-0.5mm). The surface roughness, hardness, micromorphology and glossiness of the workpiece are compared and analyzed, and it is concluded that the workpiece processed by this process is superior to the machining with vibration machine and drum. In this paper, the effects of abrasive, equipment, abrasive and synthetic factors on the reverse circle effect are studied. The results show that the removal of roller surface is not obvious when powder grinding agent is less than 120g, and the roller surface is black and without brightness. When the content of powder abrasives reaches 120g, a good processing effect can be obtained, that is, the formation of round corners is faster, and the removal of outer circles is also faster. When the content of powder abrasive is more than 120g, the oxide film produced can not be dissolved in time, which affects the processing efficiency, so the processing time of round angle will be prolonged. The rotary drum, centrifuge and vibration machine are compared under the same conditions. The result shows that the efficiency of centrifuge is the highest. The choice of abrasive is analyzed in the influence of comprehensive factors, and finally, it is concluded that the oblique cylindrical brown corundum abrasive (8 脳 16) meets the requirements of this process.
【學(xué)位授予單位】：江南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH133.3

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