【摘要】：以縫紉機(jī)導(dǎo)桿的減摩耐磨以及縫料清潔性需求為背景,對(duì)高速輕載摩擦副的縫紉機(jī)針導(dǎo)機(jī)構(gòu)進(jìn)行了無(wú)油潤(rùn)滑研究。本課題分別對(duì)縫紉機(jī)針桿試樣采用化學(xué)復(fù)合鍍技術(shù)和微弧氧化技術(shù)進(jìn)行處理,從而提高針桿試樣的自潤(rùn)滑性和耐磨性,并對(duì)其摩擦學(xué)性能作出比較。用D8-ADVANCE型X射線衍射儀分析薄膜的物相成分;用HXS-1000AK自動(dòng)轉(zhuǎn)塔顯微硬度儀測(cè)量薄膜表面硬度;在UMT-2摩擦磨損實(shí)驗(yàn)機(jī)測(cè)試薄膜的摩擦磨損性能;用稱重法計(jì)算薄膜的磨損質(zhì)量,以磨損質(zhì)量的測(cè)量值計(jì)算薄膜的磨損率;用VHX-600數(shù)碼顯微鏡觀察薄膜磨痕表面微觀形貌。研究結(jié)果表明: Ni-P-MoS_2復(fù)合鍍層中除了含有Ni相外,還含有MoS_2相,鍍層的顯微硬度為HV 654;未鍍時(shí)的摩擦因子隨法向載荷和滑行頻率的增加從0.51增大到0.62,Ni-P鍍層從0.38下降到0.29,Ni-P-MoS_2復(fù)合鍍層從0.21下降到0.18;未鍍時(shí)的磨損率隨法向載荷和滑行頻率的增加從8.33×10~(-2)mg/min增大到13.33×10~(-2)mg/min,Ni-P鍍層和Ni-P-MoS_2復(fù)合鍍層的磨損率則分別從3.67×10~(-2)mg/min增大到10×10~(-2)mg/min和從3.33×10~(-2)mg/min增大到6×10~(-2)mg/min,且在相同的實(shí)驗(yàn)參數(shù)下,未鍍?cè)嚇拥哪Σ烈蜃雍湍p率最大,Ni-P鍍層的次之,Ni-P-MoS_2復(fù)合鍍層最小。微弧氧化陶瓷膜層主要由α-Al_2O_3和γ-Al_2O_3相組成,陶瓷膜最高顯微硬度為HV 1161;氧化鋁陶瓷薄膜的摩擦因子在干摩擦?xí)r隨著法向載荷和滑行頻率的增加從0.75增大到0.88;油潤(rùn)滑時(shí)從0.25下降到0.14;MoS_2潤(rùn)滑時(shí)從0.26下降到0.19;它的磨損率在干摩擦?xí)r隨著法向載荷和滑行頻率的增加從6×10~(-2)mg/min增大到11.67×10~(-2)mg/min;油潤(rùn)滑時(shí)則從1.67×10~(-2)mg/min增大到4×10~(-2)mg/min;MoS_2潤(rùn)滑時(shí)則從1.33×10~(-2)mg/min增大到2.67×10~(-2)mg/min,且在相同的實(shí)驗(yàn)參數(shù)下,干摩擦?xí)r的摩擦因子和磨損率最大,油潤(rùn)滑時(shí)的次之,MoS_2固體潤(rùn)滑時(shí)的最小。 最后,對(duì)Ni-P-MoS_2復(fù)合鍍層和-MoS_2固體潤(rùn)滑時(shí)的氧化鋁陶瓷薄膜的摩擦學(xué)性能作出了比較,在相同的實(shí)驗(yàn)參數(shù)下,Ni-P-MoS_2復(fù)合鍍層的摩擦因子要低于MoS_2固體潤(rùn)滑的氧化鋁陶瓷薄膜的摩擦因子,其磨損率卻要高于MoS_2固體潤(rùn)滑的氧化鋁陶瓷薄膜的磨損率。
[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 偽-Al_2O_3 and 緯-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.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH117.2

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