Blasting and Coating
Blasting and Coating
(OP)
Dear Expert,
I am new in this Blasting and Coating. I have some problem on my plate. Last time we mill down the plate by CNC machine and after sand blasting and coating I found that the surface effect by CNC machine still have on the plate. If we carry out sand blasting, did the surface effect will still appear on the plate or not?
I am new in this Blasting and Coating. I have some problem on my plate. Last time we mill down the plate by CNC machine and after sand blasting and coating I found that the surface effect by CNC machine still have on the plate. If we carry out sand blasting, did the surface effect will still appear on the plate or not?
RE: Blasting and Coating
Why were you CNC machining the surface of a plate that would normally be assumed flat, and left as is?
OR
it might be the light, but the photo suggests a little curvature in that area, which might have been written in the CNC code as an approximation to the desired radius with an array of angled flats.
Mike Halloran
Pembroke Pines, FL, USA
RE: Blasting and Coating
RE: Blasting and Coating
Thank you for your explanation.
We CNC the surface because we need to mill down the plate to specified thickness.
Dear Ron,
The plate is not too large. just 3146mmL x 1290mmW. but we haven't experience before to use Blanchard grinding.
RE: Blasting and Coating
These things happen.
Tool marks on a flat milled plate are pretty sensitive to head alignment, but without physically measuring the depth of the step, it's difficult to evaluate the actual angle. You might want to get the head/table perpendicularity checked, and if it's okay, consider rewriting the CNC program to pseudo-randomize the tool path, at some expense in floor to floor time.
Mike Halloran
Pembroke Pines, FL, USA
RE: Blasting and Coating
RE: Blasting and Coating
RE: Blasting and Coating
Blanchard grinding is a precision, rotary surface grinding method. Many machine shops can do the process; however, most are limited in size to about 300mm x 300mm. There are specialty machine shop that can do larger, but I don't know if your plate could be accommodated!
RE: Blasting and Coating
Does your actual application really, really, really require a perfectly flat surface? That will be very expensive to do that may not matter.