Cutting insert: CBN (BN7000 from sumitomo)
Workpiece: Carbon steel (HRC35).
Need to know the friction co-efficient between the two materials.
Look toward the bottom of the table for 'Steel-steel'. The friction coefficients for the various grades of steel will not vary much. As a rule of thumb, the coefficient of friction of metal on metal tends to be relatively high, which is why railroads use steel wheels on steel rails.
Reference https://www.physicsforums.com/threads/coefficient-of-friction-of-medium-carbon-steel.773228/
Look toward the bottom of the table for 'Steel-steel'. The friction coefficients for the various grades of steel will not vary much. As a rule of thumb, the coefficient of friction of metal on metal tends to be relatively high, which is why railroads use steel wheels on steel rails.
Reference https://www.physicsforums.com/threads/coefficient-of-friction-of-medium-carbon-steel.773228/
If you want to have the friction coefficient precisely, you have to measure it via experimental tests and specifically orthogonal cutting tests. In order to do that, you need a dynamometer, and you have to be able to measure the chip thickness (with a micrometer, for example). I suggest that you read the second chapter of Dr. Altintas book in which the complete procedure of obtaining the friction coefficient is described in detail.
Dear Palani,
Thank you for your reply. Looks like the co-efficient even between steel-steel is quite big.
rgds,
Dear Reza,
Likely I have to measure experimentally. Thank you for the reference. Will look into it.
rgds,
- Badges
- Science topic
- Similar topics
- Engineering
- Mechanical Engineering