Cast iron roller burnishing 2

[kobuss]

Good morning guys, i have a question. I am looking to roller burnish a seal groove (inner groove). The part is made of cast iron, and after attempting to roller burnish the groove to give a better surface finish i could not see any difference in the surface finish.

It did show a very smaal improvement in surface roughness, but not the imporvement i was hoping to achieve! I am now wondering if the turning speed of the lathe or the force applied by the roller burnisher on the material is not high enough.

So if there are any suggestions please let me know.

 

[cloa]

State your initial surface condition and desired result to get good answers.

 

[kobuss]

my initial surface roughness is 1.6micon m, i want it to be 1micron m

 

[TVP]

Likely not applying sufficient force. Download the Ecoroll catalog and look through some of the applications to get an idea about tools, forces, etc.

http://www.ecoroll.de/en/service/downloads.html

 

[MiketheEngineer]

How about some Emory paper??

 

[kobuss]

Thanks for the replies guys. It would seem like it is possible from looking online that one can get a really good finish with roller burnishing on cast iron. Will give it another go!!

 

[rconner]

While perhaps non-obvious or not commonly perceived, and for whatever it is worth, the compressive strength of cast irons is far greater than the tensile.