本文關(guān)鍵詞：超精研加工對軸承套圈溝形偏差影響的研究　出處：《河南科技大學》2011年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 球軸承 超精研 溝形偏差 表面干涉 有限元分析 接觸應(yīng)力

【摘要】：球軸承套圈溝道的溝形誤差會影響溝道與鋼球的密合程度,進而影響軸承工作性能,所以需要在溝道加工中嚴格控制。油石超精研廣泛應(yīng)用于球軸承套圈溝道的精密加工,一般是溝道加工中最后一道去除材料的工序,其主要作用是提高溝道的表面質(zhì)量。生產(chǎn)中人們認識到該工序會產(chǎn)生破壞前工序磨削溝形的現(xiàn)象,只是由于超精研屬于微量加工,其對溝形的影響往往被忽視。在精密軸承加工中,為了更好地控制溝形誤差,有必要深入研究超精研對溝形的影響,以便采取有針對性的控制措施。 本文基于球軸承套圈溝道超精研加工方式和油石的磨損特性,通過理論分析,探討了一種原理性溝形誤差的形成機制:油石的擺動使得油石的工作形面與溝道表面之間產(chǎn)生干涉,造成油石沿溝道寬度方向?qū)系赖牟痪鶆蜓心?從而改變溝道原來的圓弧形狀,形成原理性溝形誤差;表面干涉程度越嚴重,溝形誤差越大。通過算例定量分析了油石厚度和溝道寬度對這種表面干涉的影響。討論了一些工藝參數(shù)和因素對這種原理性溝形誤差大小的影響:油石的厚度、擺動頻率、擺動幅度、硬度及切削能力越大,引起的溝形誤差越大;套圈溝道寬度越大,產(chǎn)生的溝形誤差越大。 在套圈溝道超精研加工中,油石是彈性地壓在套圈溝道表面上的,可以自動退讓,而且油石對套圈材料的切除能力也遠沒有砂輪或刀具那么強,因此,理論分析中的干涉并不意味著處于干涉區(qū)域的套圈材料被完全切除從而形成溝形偏差。實際套圈表面各點材料被油石切除的多少是不均勻的,依據(jù)材料磨損的基本規(guī)律,套圈表面材料研磨量的分布與油石工作面和套圈表面接觸應(yīng)力的分布和變化有關(guān),因此接觸應(yīng)力的分布和變化規(guī)律可以在一定程度上反映溝形的變化規(guī)律。本文基于ANSYS軟件,建立超精研油石和工件套圈的三維有限元模型,求解油石工作面和套圈表面的接觸應(yīng)力分布,并通過分析油石厚度和油石擺動幅度等因素對油石工作面和套圈表面接觸應(yīng)力分布的影響,進一步研究這些因素對溝形偏差的影響。研究結(jié)果同樣表明,油石的厚度和擺動幅度越大,引起的溝形誤差越大。 本文的研究成果可以促進人們對超精研影響套圈溝形誤差的機理和規(guī)律的認識,對精密軸承加工中更好地控制溝形誤差有一定指導作用。
[Abstract]:The groove shape error of the ball bearing ring groove will affect the degree of the close connection between the groove and the steel ball, and then affect the bearing working performance. Therefore, it is necessary to strictly control in the channel processing. Oil stone superfine research is widely used in the precision machining of ball bearing ring groove, generally is the last material removal process in channel processing. The main function of this process is to improve the surface quality of the channel. In production, people realize that this process will produce the phenomenon of grinding groove shape before destroying the process, only because ultrafine research belongs to micro machining. In order to better control the groove shape error, it is necessary to study the effect of super precision research on groove shape in order to take targeted control measures. Based on the super-finishing machining method of ball bearing ring and the wear characteristics of oil stone, this paper analyzes theoretically. In this paper, the forming mechanism of the groove shape error is discussed: the swinging of the oil stone causes the interference between the working shape surface and the channel surface of the oil stone, resulting in the uneven grinding of the oil stone along the channel width direction. Thus the original arc shape of the channel is changed and the principle groove shape error is formed. The more serious the surface interference. The influence of the thickness and channel width of the oil stone on the surface interference is analyzed quantitatively by a numerical example. The influence of some technological parameters and factors on the error of this kind of principle groove shape is discussed: the thickness of the oil stone. The larger the swing frequency, swing amplitude, hardness and cutting ability, the greater the error of groove shape. The wider the raceway width, the greater the groove error. In the super-finishing of ring raceway, the oil stone is elastic pressed on the surface of the ring groove, which can automatically give way, and the removal ability of the oil stone to the ring material is not as strong as that of the grinding wheel or cutting tool. The interference in the theoretical analysis does not mean that the ring material in the interference region is completely removed to form a groove deviation. The actual number of material removed by the oil stone on the surface of the ring is uneven. According to the basic law of material wear, the distribution of material grinding amount on the ring surface is related to the distribution and change of contact stress on the face of oil stone face and ring surface. Therefore, the distribution and variation of contact stress can reflect the variation law of groove shape to some extent. Based on ANSYS software, the three-dimensional finite element model of super-fine grinding stone and workpiece ring is established in this paper. The contact stress distribution of the workface and the ring surface is solved, and the influence of the thickness of the oil stone and the swing amplitude of the oil stone on the contact stress distribution of the oil stone face and the ring surface is analyzed. The influence of these factors on the groove shape deviation is further studied. The results also show that the greater the thickness and the swing amplitude of the oil stone, the greater the groove shape error. The research results in this paper can promote the understanding of the mechanism and law of the influence of superfine research on the groove shape error of the ring, and have a certain guiding role for better controlling the groove shape error in the precision bearing machining.
【學位授予單位】：河南科技大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH133.3

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