沟槽形表面织构对摩擦噪声的影响

发布时间：2018-04-22 20:16

本文选题：表面织构 + 摩擦噪声　；参考：《中国机械工程》2012年18期

【摘要】：用电加工方法在制动盘蠕墨铸铁材料表面加工出沟槽形表面织构(沟槽深度为30μm、宽度为150μm、间距为500μm),采用球—平面接触方式,选取直径为10mm的Si3N4球为对磨副,对沟槽形织构表面和光滑表面进行了摩擦噪声对比试验,研究了沟槽形表面织构对界面摩擦振动噪声的影响。试验结果表明(以下结论只针对本试验选定尺寸规格的沟槽形表面织构):法向载荷对织构表面产生摩擦噪声强度的影响较小,而对光滑表面产生摩擦噪声的水平具有重要影响;沟槽形织构表面在低法向载荷下较光滑表面更易产生摩擦噪声,但随着法向载荷从5N增大到10N,光滑表面产生的摩擦噪声强度迅速增大并与织构表面的接近;沟槽形表面织构使摩擦系统更易产生多频率的摩擦振动,较早地产生摩擦噪声且其主频率成分较复杂;沟槽形织构表面比光滑表面具有较高的摩擦因数和耐磨性,沟槽形织构的存在明显地改变了接触界面摩擦磨损行为和摩擦噪声特性,但其对应关系需要进一步深入研究。
[Abstract]:The groove surface texture (groove depth is 30 渭 m, width is 150 渭 m, spacing is 500 渭 m) is machined on the surface of vermicular graphite cast iron with brake disc by electromachining method. The spherical plane contact mode is adopted and the Si3N4 ball with diameter of 10mm is selected as the pair. The friction noise of grooved texture surface and smooth surface was compared and the effect of groove texture on the interface friction vibration noise was studied. The results show that: (the following conclusions are only for the groove surface texture of selected dimensions in this test: normal load has little effect on the intensity of friction noise on the texture surface, but has an important effect on the level of friction noise on the smooth surface; Grooved texture surface is more prone to produce friction noise than smooth surface under low normal load, but with the increase of normal load from 5N to 10N, the intensity of friction noise of smooth surface increases rapidly and is close to that of texture surface. The texture of the grooved surface makes the friction system more easily produce friction vibration with multiple frequencies, and the friction noise and its main frequency component are more complicated, the surface of the groove texture has higher friction coefficient and wear resistance than the smooth surface. The existence of grooved texture obviously changes the friction and wear behavior of contact interface and the characteristics of friction and noise, but the corresponding relationship needs further study.
【作者单位】：西南交通大学;清华大学摩擦学国家重点实验室;
【基金】：国家自然科学基金资助项目(51005191) 中央高校基本科研业务费专项资金资助(SWJTU09CX015)
【分类号】：TH117.1;TB533

【参考文献】