پديد آورنده :
پورخليلي، حميدرضا
عنوان :
تحليل و طراحي هيدروفرمينگ، براي محور عقب خودرو
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
طراحي كاربردي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك
صفحه شمار :
نه، 78ص.: مصور، جدول، نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
استاد راهنما :
محمود فرزين
توصيفگر ها :
شكل دهي , هيدروفرم , لوله , قالب , آب بندي
تاريخ نمايه سازي :
20/8/91
استاد داور :
محمدرضا فروزان، مهدي سليماني تهراني
تاريخ ورود اطلاعات :
1396/09/21
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
83 Analysis and Design of Hydroforming Process for Automobile Rear Axel Hamid Reza Pour Khalily pourkhalily@iran ir Date of Submission 2012 09 17 Department of mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Mahmoud Farzin farzin@cc iut ac irAbstract Hydroforming is a metal forming process in which the required forming force is providedby a fluid media like water Tube hydroforming is a relatively new process and thus in this thesishydroforming of a car rear axel was studied At the beginning various tube hydroformingmethods were explained and their advantages and disadvantages were discussed Then computersimulation procedure of the process and its implementation was explained in detail In thesesimulations the known parameters were material properties of the tube and geometry of formingdies Unknown parameters which had to be determined by these simulations were the initialdiameter of tube and the pressure path during the forming process An important question in thedesign of process is the appropriate type of tube hydroforming to produce that particular part Inother words Low Pressure Hydroforming High Pressure Hydroforming or Pressure SequenceHydroforming PSH To find the answer of the question these different types of hydro formingwere simulated and compared and it was concluded that the best method to produce this part wasPSH which caused the best thickness distribution After choosing PSH tube diameter wasoptimized To find the best diameter upper limit of outside diameter has been determined Thereis a maximum tube diameter because larger tube sizes will not fit in the die A good choice toproduce the axel was the largest outside diameter that fits in the die However some wrinkles weremade in transition zone near the end of tube Simulation results showed that these wrinkles couldnot be removed even at pressures more than 7000 bar Although the geometry of transition zonewas not as important as middle zone it was preferred to have a more accurate geometry andlighter part Then the tube diameter range was reduced to avoid wrinkles in the transition zone On the other hand small tubes needed very high pressures to be formed and in many cases thetube could burst So an appropriate diameter was chosen and PSH was designed to produce thepart using pressures under 500bar It was also important to have an acceptable thicknessdistribution Therefore low pressure and pressure sequence hydroforming were combined toobtain an optimum tube diameter Then die and gripper forces were estimated using simulationresults A hydroforming industrial tool was also used to validate simulation results Thicknessdistribution had been compared between simulated part and a real part that showed goodagreement between them At the end sealing methods of tubes were discussed and two dimentional stress simulation of dies was also performed Keywords Metal forming tube hydroforming tube sealing die
استاد راهنما :
محمود فرزين
استاد داور :
محمدرضا فروزان، مهدي سليماني تهراني
