發(fā)布時(shí)間：2018-03-02 02:10

  本文關(guān)鍵詞： 面接觸 脂潤(rùn)滑 油潤(rùn)滑 三維表面表征參數(shù) 摩擦　出處：《合肥工業(yè)大學(xué)》2012年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：面接觸摩擦副在工程實(shí)踐中應(yīng)用廣泛，如塑性成形，滑動(dòng)軸承，機(jī)械密封等。通過(guò)對(duì)面接觸摩擦副進(jìn)行微造型來(lái)改善其摩擦特性已成為摩擦學(xué)研究的一個(gè)重要方向。 本文為了研究面接觸條件下表面形貌表征參數(shù)，特別是封閉空體體積及連通性系數(shù)對(duì)激光微造型表面摩擦特性的影響。首先采用YLP-F10光纖激光打標(biāo)機(jī)在上試件環(huán)塊圓環(huán)端面上進(jìn)行激光加工，得到不同表面微造型的上試件；然后使用Talysurf CCI Lite非接觸式三維光學(xué)輪廓儀對(duì)試件進(jìn)行掃描，測(cè)得試件的ISO25178三維表征參數(shù)及相應(yīng)取樣區(qū)間上的掃描圖像及高度數(shù)據(jù)，并基于高度數(shù)據(jù)計(jì)算出了相應(yīng)實(shí)測(cè)表面的連通性系數(shù)及封閉空體體積參數(shù)；在HDM20摩擦磨損試驗(yàn)機(jī)上，，針對(duì)油潤(rùn)滑和脂潤(rùn)滑兩種潤(rùn)滑劑、不同載荷、不同轉(zhuǎn)速等工況和不同摩擦副配對(duì)材料，進(jìn)行一系列的面接觸摩擦磨損試驗(yàn)；進(jìn)而研究了載荷、速度、凹坑深度、表面ISO-25178參數(shù)、連通性系數(shù)、封閉空體體積等與摩擦特性的關(guān)系。 結(jié)果表明：表面形貌的微觀結(jié)構(gòu)特性對(duì)面接觸摩擦副的摩擦特性具有顯著的影響，但在油潤(rùn)滑條件下表面形貌的微觀結(jié)構(gòu)特性對(duì)摩擦的影響要比脂潤(rùn)滑條件下的更顯著；在鋼對(duì)銅摩擦副條件下織構(gòu)表面的摩擦系數(shù)變化比較復(fù)雜，在鋼對(duì)鋼摩擦副條件下織構(gòu)表面的摩擦系數(shù)變化相對(duì)平穩(wěn)；在不同的條件下，最優(yōu)的表面微觀結(jié)構(gòu)特性也不同；將連通性系數(shù)和體積參數(shù)結(jié)合起來(lái)對(duì)表面形貌進(jìn)行表征將更有利于表面微觀結(jié)構(gòu)特性的摩擦學(xué)設(shè)計(jì)；油潤(rùn)滑條件下，在載荷為300N且上試件端面圓環(huán)平均速率為1.25-1.50m/s時(shí)，鋼對(duì)銅以及鋼對(duì)鋼的摩擦學(xué)特性與三維表征參數(shù)之間關(guān)系的變化規(guī)律一致，但當(dāng)速率在0.25-1.25m/s時(shí)鋼對(duì)銅的顯示出獨(dú)特的變化。
[Abstract]:The surface contact friction pair has been widely used in engineering practice, such as plastic forming, sliding bearing, mechanical seal and so on. In order to study the characterization parameters of surface morphology under the condition of surface contact, Especially the effect of the volume and connectivity coefficient of the closed hollow body on the friction characteristics of the laser micro-moulding surface. Firstly, the laser processing machine of YLP-F10 fiber laser marking machine was used on the ring ring end face of the sample to obtain the different surface micro-modeling samples. Then Talysurf CCI Lite non-contact 3D optical profilometer was used to scan the specimen, and the ISO25178 3D characterization parameters, scanning images and height data on the corresponding sampling interval were measured. Based on the height data, the connectivity coefficient and the volume parameters of the closed empty body are calculated. In the HDM20 friction and wear testing machine, two kinds of lubricants, oil lubrication and grease lubrication, are used under different loads. A series of surface contact friction and wear tests were carried out under different rotating speeds and different friction pairs, and the load, velocity, pit depth, surface ISO-25178 parameters and connectivity coefficient were studied. The relationship between the volume of closed hollow body and the friction characteristics. The results show that the microstructural characteristics of the surface topography have a significant effect on the friction characteristics of the contact friction pairs, but the influence of the microstructure characteristics of the surface morphology on the friction is more significant than that under the grease lubrication condition. Under the condition of steel to copper friction pair, the variation of the friction coefficient of texture surface is more complex, the variation of friction coefficient of texture surface is relatively stable under the condition of steel to steel friction pair, and the optimum surface microstructure characteristics are different under different conditions. Combining connectivity coefficient with volume parameters to characterize the surface morphology will be more beneficial to the tribological design of the surface microstructure. Under the condition of oil lubrication, when the load is 300N and the average rate of the end ring of the sample is 1.25-1.50m/ s, The relationship between the tribological properties of steel to copper and steel to steel is consistent with the three dimensional characterization parameters, but when the rate is between 0.25 and 1.25 m / s, the variation of steel to copper is unique.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類(lèi)號(hào)】：TH117

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