About surface roughness

[JosephERG]

Hi All,

Do anyone of you guys know how to improve the
surface quality (roughness) of inside surfaces
specifically for stainless steel tubes with
inside diameters as small as 0.41 to 0.55 mm?
Our team is currently developing a dispensing tool
that has low friction properties. Therefore, capable
of withstanding fluids with high viscosity (e.g.
Pb solder paste). So far, we haven't achieved good
results yet. Any help?

thanks very much.

 

[PSE]

Have you tried electropolishing or perhaps fluid jet polishing? A web search should bring up a multitude of links on either.

Regards,

 

[aspearin1]

I think your best bet is a polishing slurry. You'll need to pump (or otherwise agitate within) various stages of slurry starting with higher loads of larger abrasive, gradually getting down to loads of smaller abrasives. This is simply mechanical polishing. Look up CMP (Chemical Mechanical Planarization) for more information. Hope it helps.

Aaron A. Spearin
ASQ CSSBB
Engineering Six-S'$

http://www.Engineering6ss.com

"The only constant in life is change." -Bruce Lee

 

[tripleZ]

http://www.extrudehone.com/microflowafm.html

This may work for you. I've used their AFM process to assist in polishing dies and it does work well. The microflow AFM I haven't tried however, but it looks promising.

 

[JosephERG]

Thank you very much guys!!!!!

I'll check on these links!!!!!

JosephERG

 

[saberblue]

On occasion I have seen this done by "ballizing" the ID -- pushing a precision carbide or HSS ball through the tube using a lubricating fluid as the "hydrolic" fluid