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Analaysis of Ultrasonic Vibration Assisted Turing of Engineering Ceramics

Zabihi Hosseini, Morteza | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47601 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Movahhedi, Mohammad Reza; Akbari, Javad
  7. Abstract:
  8. Due to high strength, hardness and high resistance to abrasion, ceramics are difficult for machining. Also as the conductivity coefficient of these materials is low, major amount of produced heat during machining process will be absorbed in the cutting tool which causes intensive wear in cutting tool edge. As a result employing traditional machining for these materials because of low machining speed, tool wear, high roughness and large cutting force, has little efficiency in practice. Therefore non-traditional machining method may improve efficacy. In this thesis effect of utilizing ultrasonic vibration in machining process of fused cast silica ceramic has been studied. Aim of this study at first step is evaluation of vibrational parameters effect, ultrasonic power and direction of imposing vibration on results of process, such as cutting force, roughness and quality of surface, tool wear and fracture. Second, effects of minimum quantity lubrication in improving machining process assisted ultrasonic vibration have been investigated. In this respect at first, design and manufacturing of ultrasonic vibration actuator and other implements has been done and then empirical experiments on the mentioned ceramic has been conducted and effect of parameters on the results of process has been evaluated. Obtained results depict notable reduction in cutting force due to employing ultrasonic vibration and consequently decrease in energy consumption of machining process and temperature and improvement in surface quality. Also remarkable enhancement in tool endurance due to using of minimum quality lubrication has been shown
  9. Keywords:
  10. Engineering Ceramics ; Ultrasonic-Vibration ; Tool Wear ; Lubrication ; Minimum Quantity Lubrication

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