In a conventional method we can use tool steel for boring or reaming
tools upto L/D (Length/Diameter) ratio of 5 due to its low static
stiffness & damping ratio. Due to this it can be operated at relatively
For large L/D ratios of more than 5, carbide or high density material is
used because of its relatively static stiffness & damping properties
against tool steel. This high density material can machine only upto 7
L/D without chattering & has following disadvantages.
- Cannot use high cutting parameters due to small increment in specific
- Due to large hardness, machining is difficult & costly.
- Due to high specific weight, tool becomes very heavy. Center of shifts
from center particularly when operation is horizontal (HMC or SPM).
- High cost of raw material as well as manufacturing.
- Handling is also a key concern, due to its brittle nature & bulky
Therefore we use advanced carbon fiber boring bar for antivibration
boring which has following advantages over conventional methods,
- 1/3 rd weight of steel boring bars
- times dampening than of steel
- 4times dynamic stiffness than of carbide or high dense tools
- increased cutting parameters due to ultra light weight design