- 學位論文
橢圓比與運動方向對摩擦係數及面積增長量之影響
The Effects of Ellipticity and Motion Direction on Junction Growth and Friction Force
摘要
精密機械元件於運動中之界面接觸特性與元件之靜態表面接觸特性有相當之差異，本研究利用微接觸實驗台量測四種橢圓比之純銅試件和石英玻璃片作不同方向(0°、45°、90°)運動，探討產生之摩擦系數、變形量和界面增長量之變化情形。本實驗過程中先施加一正向負荷於純銅試件與石英玻璃片，接觸後再給予施加一切線速度使純銅試件在石英玻璃平面上產生滑動，並探討兩試件在不同接觸角角度、不同橢圓比、不同負荷、不同切線速度下之界面增長量與變形量之變化情形，並深入了解其接觸界面對摩擦係數有何影響性。 在本實驗設定之參數(負荷50N、100N、170N與速度10?m/s、20?m/s、30?m/s)實驗結果顯示，當純銅試件與石英玻璃片接觸並產生切線滑動現象時，其界面增長量與變形量皆呈現負荷越大增長量與變形量越大的趨勢，但增長與變形情形，皆集中發生在初始階段。故界面增長量與變形量與正向負荷成正向關係，而接觸角度與橢圓率對增長與變形情形影響不大。摩擦係數實驗結果皆呈現負荷越大摩擦係數越小之情形，而切向滑移速度與橢圓比率及接觸角度對摩擦係數影響並沒有一定規律。
並列摘要
At this stage in the study of micro-mechanical components of the theoretical studies, however, are usually ignored the tangential speed, if we can have a better understanding of the characteristics of the micro-contact tangent interface can be found In fact, the tangential velocity of the micro-mechanical components the surface has a considerable impact, if there is a better understanding of the tangent interface, not only in the operation of the micro-mechanical components more effective solution to the operation of the machine, can be accurately control and achieve higher output value of more can effectively prolong the life of the micro-mechanical element. This research sonication cleaning the surface of the built recycling four proportion of pure copper specimen microcontact bench measurements and square quartz glass for analog two objects come into contact, the coefficient of friction and deformation arising the case of the interface increase. During the experiment to impose a positive load copper specimen with square quartz glass contact and then give all linear velocity is applied to the copper specimen in the the square quartz glass plane sliding, and to explore the two specimens in different contact angles angle, a different proportion of specimens of different load, the the copper specimen under different tangential velocity interface growth with the change of the deformation of the case, and in-depth understanding of the impact of the contact interface friction coefficient. The experimental results show that when copper specimen in contact with the quartz glass and generates a tangential sliding phenomenon, its interface growth with the amount of deformation are rendered the bigger the load increase and the greater the amount of deformation of the trend, but growth and deformation situation are concentrated in the initial stage, the contact angle and ellipticity little effect on growth and deformation situation. So the interface growth in the amount of deformation is proportional to the forward load. To the predefined parameters (load 50N, 100N, 170N speed 10 m / s, 20 m / s, 30 m / s), the coefficient of friction experimental results are presented the case of the smaller the load the greater the friction coefficient, tangential slip velocity ellipse ratio and contact angle has little effect on the friction coefficient.