Designe Optimization Of Ceramic-Metal Complex Structure Internal Grinding Spindle

As a result of advances in cutting tool and machine tool technologies,machining is being performed at ever increasing cutting speeds and feed rates. The terms'high speed machining'(HSM) and'high speed cutting'(HSC) have come into common use in recent years. That requires higher stiffness of cutting system. The grinding spindle with large length-to-diameter(L/D) ratios typically have low dynamic stiffness making them susceptible to mechanical vibrations that result in poor part quality and short tool life. Substantial amount of research and many practical applications have focused on methods to limit unwanted vibration in cutting operations, allowing for grinding with large L/D ratios. In this thesis, the structure, the static and dynamic characteristics of the spindle are studied thoroughly using ANSYS software by FEM. The study in detail is as follows:(1)Design structure of the ceramic-metal composite structure internal grinding spindle by studying the advantage and disadvantage of ceramic and metal, and considering the working situation. Choose befitting material for all parts of the internal grinding spindle.(2)Analysis the static and dynamic theories of the internal grinding spindle. Find out the effective methods to improve the grinding spindle's characteristic.(3)Optimize and analyze the grinding spindle's dimension by using ANSYS software, in order to make it be the best state. Compare the static and dynamic characteristic of the spindle under the two situations.(4)Study viscous damping technology and use it to reduce the spindle's vibration. Analyze the spindle's performance with different damping core diameter.