Roller Burnishing Aluminium

[Rickabilly]

(07-02-2012, 07:30 AM)EdK Wrote: Rick,

When would one use that process and why?

Thanks,
Ed

Well, Of course, when you Ummm, and also when Hmmm.

I dunno

No seriously, when you want a smooth finish that can't afford to pick up on another part or material, so a roller that has cloth or paper run over it for example, or a bearing fit that needs some precision to it, that is; a really tight transition fit.

Also anywhere that fatigue is a problem as there are no machining marks left there are no propagation lines to start fatigue from, and the surface is under compression so reducing the tendancy to fatigue also.

Or where you want to finish with a polish, burnishing first starts the process off much better than turning, and there is the benefit of reducing corrosion, which works on all sorts of parts, the "cloudy" appearance looks a lot like clear anodizing as it happens.

My opinion too Dave is that a thinner roller might be better, so what I am thinking as a next step is to set up a really highly crowned roller, maybe with a width od 6mm but a crown radius of 4mm?

I am just thinking out loud here, what do you all think?

Best Regards
Rick