عنوان :
تحليل فرآيند تراشكاري به كمك ارتعاشات فراصوتي بوسيله مدل اصطكاك ديناميكي و ارزيابي توسط آزمايشات تجربي
گرايش تحصيلي :
ساخت و توليد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك
صفحه شمار :
سيزده،119ص.:مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي وانگليسي
استاد راهنما :
سعيد بهبهاني
تاريخ نمايه سازي :
8/6/93
استاد داور :
جواد اكبري، رمضانعلي مهدوي نژاد، محمود فرزين،محسن بدرسماي، عباس قايي
كد ايرانداك :
ID656 دكتري
چكيده انگليسي :
Analysis of the Vibration Assisted Turning Process with the Dynamic Friction Model and Evaluation with Experimental Tests Reza Nosouhi Email rezanosuhi@me iut ac ir Date of Submission Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Supervisor Dr SaeedBehbahani behbahani@cc iut ac ir Advisor SaeidAmini amini@kashanu ac ir Department Graduate Program Coordinator Dr MohammadrezaSalimpour Department of Mechanical Engineering Isfahan University of Technology Isfahan Iran Department of Mechanical Engineering Kashan University Kashan Iran Abstract A novel analytical model for prediction of forces in elliptical vibration assisted turning EVAT using a dynamic friction model is presented in this paper and verified with experimental EVAT tests In EVAT process the main cause of force reduction is the reversal of the friction force direction in a fraction of vibration cycle time In analytical modeling of EVAT the change of the relative sliding velocity direction causes a stick slip condition which cannot be detected with static friction models like Coulomb model In this research a dynamic friction model named LuGre model is used to predict the machining forces in EVAT To derive the model coefficients a series of orthogonal cutting experiments are performed on Al 6061 Al 7075 T6 Copper and Inconel 718 and the friction coefficients are identified using genetic algorithm optimization method The cutting forces are determined by incorporating the friction forces calculated from LuGre model To verify the results a series of EVAT experiments are performed on four abovementioned work piece materials using an EVAT tool The machining forces are then compared with the analytical results The results achieved from the analytical solution using LuGre dynamic friction model are in a good agreement with experimental results A new model is also developed and the results of the modeling using this model is also compared with the experimental results showing that the new model has exceled the results in comparison with the LuGre model Keywords Vibration Assisted Machining Dynamic Friction Model Genetic Algorithm Model Identification Ultrasonic Vibration Tool
استاد راهنما :
سعيد بهبهاني
استاد داور :
جواد اكبري، رمضانعلي مهدوي نژاد، محمود فرزين،محسن بدرسماي، عباس قايي
