پديد آورنده :
دهقاني، عليرضا
عنوان :
بررسي آثار ميدان مغناطيسي بر روي عمر ابزار، كيفيت سطح و تغييرات نيروهاي ماشينكاري
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
ساخت و توليد
محل تحصيل :
اصفهان، دانشگاه صنعتي اصفهان، دانشكده مكانيك
صفحه شمار :
دوازده، 166ص: مصور، جدول، نمودار
يادداشت :
ص.ع:به فارسي و انگليسي
استاد راهنما :
عليرضا فدايي تهراني
توصيفگر ها :
ماشينكاري خشك , سايش ابزار , صافي سطح , طراحي آزمايش , آناليز واريانس
تاريخ نمايه سازي :
14/10/92
استاد داور :
عباس قائي، محمدرضا فروزان
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتال
چكيده انگليسي :
167 Investigation of Magnetic Field Effects on Tool Life Surface Quality and Machining Forces Changes Alireza Dehghani Alireza Dehghani@me iut ac ir Date of Submission September 21 2013 Department of Mechanical Engineering IsfahanUniversity of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Dr Alireza Fadaei Tehrani mcjaft@cc iut ac irAbstract The development of machining processes with no wear or very little wear has been one of the majorobjectives of researchers since the very beginning of the field In a very general sense there are twoengineering solutions to the problem of minimizing wear The most common method for the reduction orelimination of wear from cutting mechanisms is to separate the surfaces by the use of fluid or solidlubricants The second general approach to wear control is to modify materials and material properties andso material pair behavior Examples are the production of special materials and alloys for cutting tools andcoating of hardened layers on tool surfaces In contrast to using a material lubricant another possibility for the seperation of tool and workpiece isthe use of magnetic or other repulsive force fields Control of wear in this way is classified as activecontrol It is characterized by externally supplying energy so that the behavior of the system is altered asdesired Magnetic treatment to alter material behavior in machining processes and material properties ofmanufactured parts have many attractive features In the present research the basic theory of magnetic assisted machining has been studied firstly Byproviding some new ideas and doing some primary tests the best combination of applying magnetic fieldon machining process with reducing air gap on magnetic circuit has become possible The magnetic assistedmachining was used for reducing tool wear imrpving surface roughness and machining forces Thesephenomena are due to the change of workpiece surface plastic properties which is caused by a simultaneousaction of magnetic and thermo mechanical processes known as a magnetic plastic effect Indeed magnetization of surfaces in cutting changes their strain energy state accelerates the hardening of cuttingsurface and simultaneously modifies the subsurface plastic flow on the workpiece surface under the rakeface of the tool In this thesis for the first time by design and fabrication of a new mechanism sufficient magnetic fieldwas simultaneously applied on tool and workpiece in wich air gap reduction was possible Using the designof experiments method full factorial technique 3 3 2 tests were conducted and the results were taken Foranalyzing the effect of input parameters the analysis of variance method was used The results proved theadvantages of the proposed method in comparison with traditional ones Microscopic photoes of tool wearand force diagrams of dynanometer present the benefits of new mechanism Key words Dry machining Magnetic field Tool wear Machining forces Surface roughness Design of experiments Analysis of variance
استاد راهنما :
عليرضا فدايي تهراني
استاد داور :
عباس قائي، محمدرضا فروزان
