پديد آورنده :
احدي راد، امين
عنوان :
طراحي و ساخت يك مكانيزم براي ايجاد ميكروحفره روي سطح با استفاده از روش ميكرو شكل دهي
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
ساخت و توليد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك
صفحه شمار :
نه،55ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد مشاور :
محسن بدرسماي
توصيفگر ها :
تربيولوژي , اصطكاك
تاريخ نمايه سازي :
93/12/16
استاد داور :
محمدرضا فروزان، صالح اكبرزاده
چكيده انگليسي :
56 Design and Manufacturing of a Mechanism for Fabrication of Submillimeter Dimples on Surface Using Forming Process Amin Ahadi Rad A Ahadirad@me iut ac ir Date of Submission 2014 10 26 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Abbas Ghaei ghaei@cc iut ac irAbstractAbout 40 percent of total engine energy dissipates due to friction and abrasion So the energyconsumption decreases if the friction is somehow reduced During the past years it is reported thatcreating small size dimples and slots i e with the dimensions of less than one millimeter on thesurface of contact bodies can have a lot of benefits Friction decrease better lubrication service lifeincrease and better cooling are among the benefits of creating small size dimples and slots Decrease in friction coefficient depends on the texture geometry which is created on the surface The effect of surface texture on the friction decrease considerably depends on such factors asshape size density and the pattern on the surface In general several approaches have beenproposed to create small size cavities on the surface Mechanical methods e g grinding shotblasting indenter lithography methods e g chemical and electrochemical and high energyradiation e g laser beam electronic beam and electric discharge machining are being used Eachmethod has its own advantages and disadvantages This project aims to design and manufacture asuitable mechanism to create small size dimples on the surface of metals through the indentationprocess as this method is cheap and requires simpler equipments A suitable tool as an indenter wasdesigned using ABAQUS finite element commercial package The tool was then manufactured andwas mounted on a suitable seat The mechanism was mounted on a milling machine to bring thepart in the required position and small size dimples were created on the surface of discs Thecoefficient of friction for three different dimple densities i e 5 9 5 and 15 at three differentnormal force magnitudes i e 10 N 15 N and 20 N was measured using a pin on disc machine The results of this study show that the proposed method is able to generate dimples as small as 400
استاد مشاور :
محسن بدرسماي
استاد داور :
محمدرضا فروزان، صالح اكبرزاده
