Dynamic parameter identification of tool holder/tool combination

• Main Author: Tan, Kenn Jian Wen.
• Other Authors: Lin Rongming
• Format: Final Year Project
• Language: English
• Published: 2010
• Subjects: DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics
• Online Access: http://hdl.handle.net/10356/39898
• Institution: Nanyang Technological University

Chattering is a very well known problem in this age of high speed machining (HSM). However it is also a problem that would always exist in HSM. Hence it is vital to understand how different parameters and combinations would affect the chatter stability of the machine. In this project, modal analysis of different tool / tool holder combinations was conducted and tabulated. This data collected was analyzed it was noticed that low dynamic stiffness values were obtained in similar natural frequency values across all the different combinations. 5 natural frequency modes of low dynamic stiffness from these combinations were used to create an initial interpolation graph showing the relationship between these changes in combinations against the dynamic stiffness values generated when vibrating at a certain mode of natural frequency. This was done through the use of Matlab and the results of the initial phase look positive. Further tests and experimentation would have to be conducted to verify these initial results through reception coupling before an interpolation table for industrial use can be generated showing the expected natural frequencies and its corresponding dynamic stiffness values for the different combinations used. These natural frequencies and its dynamic stiffness values would then be verified against the simulated results and used to generate the dynamic stability graph through the program written by Dr Ko J. H.