O/T - scratiching up the surface of a roller while holding a tolerance on the OD??

[jspangler]

Hi

Need some help on a project here at work. We are roughing up some large 304 ss rollers ( 16" OD x 60" Length) by sending them out to be blasted. The results are inconsistent, at best. Does anyone here have any suggestions on a tool or process we can use here in house, to achieve the same result, while holding a decent tolerance on the OD? One of the guys here suggested knurling.... ?

 

Thanks in advance,

John

[Guest CNC Apps Guy 1]

What's up John?

 

Yeah, if you're looking for some consistency, knurling would be a better option that beadblasting IMHO.

[chris m]

Shotpeening is typically a more controlled process than blasting, but I don't know how rough you need to be. Knurling would be much more consistent than blasting, but won't be very quick.

[SledGeek]

Is it a solid piece or tubing ? Careful on a shotpeening a thinwall tube that big if your trying to hold a tolerance. Also induces compression or work hardening on the surface and leaves you less surface contact area. Don't know if that's an issue....

Years ago we used to make and rework printing press rollers and it didn't work so good on those because surface contact is needed. Ended up flash chroming and regrinding $$$$$

There is something called laser peening that's done by robot and computers, but I think it's more for stress releiving and surface hardening.....

[crazy^millman]

John would a roughing pass to finish do the trick? We use to have 20' rollers vulcanized all the time and that was how we roughed them up for that process was just high feed rates.