高速轻载摩擦副的无油润滑研究
发布时间：2018-11-17 07:03
【摘要】：以缝纫机导杆的减摩耐磨以及缝料清洁性需求为背景,对高速轻载摩擦副的缝纫机针导机构进行了无油润滑研究。本课题分别对缝纫机针杆试样采用化学复合镀技术和微弧氧化技术进行处理,从而提高针杆试样的自润滑性和耐磨性,并对其摩擦学性能作出比较。用D8-ADVANCE型X射线衍射仪分析薄膜的物相成分;用HXS-1000AK自动转塔显微硬度仪测量薄膜表面硬度;在UMT-2摩擦磨损实验机测试薄膜的摩擦磨损性能;用称重法计算薄膜的磨损质量,以磨损质量的测量值计算薄膜的磨损率;用VHX-600数码显微镜观察薄膜磨痕表面微观形貌。研究结果表明: Ni-P-MoS_2复合镀层中除了含有Ni相外,还含有MoS_2相,镀层的显微硬度为HV 654;未镀时的摩擦因子随法向载荷和滑行频率的增加从0.51增大到0.62,Ni-P镀层从0.38下降到0.29,Ni-P-MoS_2复合镀层从0.21下降到0.18;未镀时的磨损率随法向载荷和滑行频率的增加从8.33×10~(-2)mg/min增大到13.33×10~(-2)mg/min,Ni-P镀层和Ni-P-MoS_2复合镀层的磨损率则分别从3.67×10~(-2)mg/min增大到10×10~(-2)mg/min和从3.33×10~(-2)mg/min增大到6×10~(-2)mg/min,且在相同的实验参数下,未镀试样的摩擦因子和磨损率最大,Ni-P镀层的次之,Ni-P-MoS_2复合镀层最小。微弧氧化陶瓷膜层主要由α-Al_2O_3和γ-Al_2O_3相组成,陶瓷膜最高显微硬度为HV 1161;氧化铝陶瓷薄膜的摩擦因子在干摩擦时随着法向载荷和滑行频率的增加从0.75增大到0.88;油润滑时从0.25下降到0.14;MoS_2润滑时从0.26下降到0.19;它的磨损率在干摩擦时随着法向载荷和滑行频率的增加从6×10~(-2)mg/min增大到11.67×10~(-2)mg/min;油润滑时则从1.67×10~(-2)mg/min增大到4×10~(-2)mg/min;MoS_2润滑时则从1.33×10~(-2)mg/min增大到2.67×10~(-2)mg/min,且在相同的实验参数下,干摩擦时的摩擦因子和磨损率最大,油润滑时的次之,MoS_2固体润滑时的最小。 最后,对Ni-P-MoS_2复合镀层和-MoS_2固体润滑时的氧化铝陶瓷薄膜的摩擦学性能作出了比较,在相同的实验参数下,Ni-P-MoS_2复合镀层的摩擦因子要低于MoS_2固体润滑的氧化铝陶瓷薄膜的摩擦因子,其磨损率却要高于MoS_2固体润滑的氧化铝陶瓷薄膜的磨损率。
[Abstract]:Based on the anti-friction and wear resistance of the guide rod of the sewing machine and the requirement of the cleaning of the sewing material, the oil-free lubrication of the needle guide mechanism of the sewing machine with high speed and light load friction pair was studied. In this paper, electroless composite plating and micro-arc oxidation were used to treat needle rod specimen of sewing machine, so as to improve the self-lubricity and wear resistance of needle rod sample, and to compare their tribological properties. D8-ADVANCE X-ray diffractometer was used to analyze the phase composition of the film, HXS-1000AK automatic turret microhardness instrument was used to measure the surface hardness of the film, and the friction and wear properties of the film were tested by UMT-2 friction and wear tester. The wear quality of the film was calculated by weighing method, the wear rate of the film was calculated by the measured value of the wear mass, and the micro-morphology of the wear trace surface was observed by VHX-600 digital microscope. The results show that the Ni-P-MoS_2 composite coating contains not only the Ni phase but also the MoS_2 phase. The microhardness of the coating is HV 654. The friction factor decreases from 0.38 to 0.29 Ni-P-MoS2 composite coating from 0.21 to 0.18 with the increase of normal load and sliding frequency. The wear rate increases from 8.33 脳 10 ~ (-2) mg/min to 13.33 脳 10 ~ (-2) mg/min, with the increase of normal load and sliding frequency. The wear rate of Ni-P coating and Ni-P-MoS_2 composite coating increased from 3.67 脳 10 ~ (-2) mg/min to 10 脳 10 ~ (-2) mg/min and from 3.33 脳 10 ~ (-2) mg/min to 6 脳 10 ~ (-2) mg/min, respectively. Under the same experimental parameters, the friction factor and wear rate of the uncoated samples are the highest, the Ni-P coating is the second, and the Ni-P-MoS_2 composite coating is the least. The ceramic film is mainly composed of 伪-Al_2O_3 and 纬-Al_2O_3 phases. The highest microhardness of the ceramic film is HV 1161. The friction factor of alumina ceramic film increases from 0.75 to 0.88 with the increase of normal load and sliding frequency in dry friction, and decreases from 0.25 to 0.14 MoS2 in oil lubrication from 0.26 to 0.19. The wear rate increases from 1.67 脳 10 ~ (-2) mg/min to 4 脳 10 ~ (-2) mg/min; when dry friction increases from 6 脳 10 ~ (-2) mg/min to 11.67 脳 10 ~ (-2) mg/min; oil. The MoS_2 lubrication increased from 1.33 脳 10 ~ (-2) mg/min to 2.67 脳 10 ~ (-2) mg/min,. Under the same experimental parameters, the friction factor and wear rate were the highest in dry friction, followed by oil lubrication. MoS_2 solid lubrication of the smallest. Finally, the tribological properties of the Ni-P-MoS_2 composite coating and the alumina ceramic film with-MoS_2 solid lubrication are compared. Under the same experimental parameters, The friction factor of Ni-P-MoS_2 composite coating is lower than that of MoS_2 solid lubricated alumina ceramic film, but its wear rate is higher than that of MoS_2 solid lubricated alumina ceramic film.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH117.2
本文编号：2336889
[Abstract]:Based on the anti-friction and wear resistance of the guide rod of the sewing machine and the requirement of the cleaning of the sewing material, the oil-free lubrication of the needle guide mechanism of the sewing machine with high speed and light load friction pair was studied. In this paper, electroless composite plating and micro-arc oxidation were used to treat needle rod specimen of sewing machine, so as to improve the self-lubricity and wear resistance of needle rod sample, and to compare their tribological properties. D8-ADVANCE X-ray diffractometer was used to analyze the phase composition of the film, HXS-1000AK automatic turret microhardness instrument was used to measure the surface hardness of the film, and the friction and wear properties of the film were tested by UMT-2 friction and wear tester. The wear quality of the film was calculated by weighing method, the wear rate of the film was calculated by the measured value of the wear mass, and the micro-morphology of the wear trace surface was observed by VHX-600 digital microscope. The results show that the Ni-P-MoS_2 composite coating contains not only the Ni phase but also the MoS_2 phase. The microhardness of the coating is HV 654. The friction factor decreases from 0.38 to 0.29 Ni-P-MoS2 composite coating from 0.21 to 0.18 with the increase of normal load and sliding frequency. The wear rate increases from 8.33 脳 10 ~ (-2) mg/min to 13.33 脳 10 ~ (-2) mg/min, with the increase of normal load and sliding frequency. The wear rate of Ni-P coating and Ni-P-MoS_2 composite coating increased from 3.67 脳 10 ~ (-2) mg/min to 10 脳 10 ~ (-2) mg/min and from 3.33 脳 10 ~ (-2) mg/min to 6 脳 10 ~ (-2) mg/min, respectively. Under the same experimental parameters, the friction factor and wear rate of the uncoated samples are the highest, the Ni-P coating is the second, and the Ni-P-MoS_2 composite coating is the least. The ceramic film is mainly composed of 伪-Al_2O_3 and 纬-Al_2O_3 phases. The highest microhardness of the ceramic film is HV 1161. The friction factor of alumina ceramic film increases from 0.75 to 0.88 with the increase of normal load and sliding frequency in dry friction, and decreases from 0.25 to 0.14 MoS2 in oil lubrication from 0.26 to 0.19. The wear rate increases from 1.67 脳 10 ~ (-2) mg/min to 4 脳 10 ~ (-2) mg/min; when dry friction increases from 6 脳 10 ~ (-2) mg/min to 11.67 脳 10 ~ (-2) mg/min; oil. The MoS_2 lubrication increased from 1.33 脳 10 ~ (-2) mg/min to 2.67 脳 10 ~ (-2) mg/min,. Under the same experimental parameters, the friction factor and wear rate were the highest in dry friction, followed by oil lubrication. MoS_2 solid lubrication of the smallest. Finally, the tribological properties of the Ni-P-MoS_2 composite coating and the alumina ceramic film with-MoS_2 solid lubrication are compared. Under the same experimental parameters, The friction factor of Ni-P-MoS_2 composite coating is lower than that of MoS_2 solid lubricated alumina ceramic film, but its wear rate is higher than that of MoS_2 solid lubricated alumina ceramic film.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH117.2
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