Sharp edge tolerance?

[trickysheep]

Just started a new job and they don't have any asme / ansi specs here! Anyone tell me what tolerance I have on a sharp corner callout per ANSI Y14.5M-1982?

 

[KENAT]

This whole thing reminds me-

We developed a highly advanced method of detecting/determining burrs & sharp edges at my last place.

If I picked up an item, and it had a sharp edge, you could guarantee I'd cut myself on it.

KENAT, probably the least qualified checker you'll ever meet...

 

[ctopher]

Ever pick up a part off a machine and have a burr stick into your hand? Ouch!

Chris
SolidWorks 07 4.0/PDMWorks 07
AutoCAD 06
ctopher's home (updated 04-21-07)

 

[KENAT]

Numerous times, hence my post.

My specialty was doing it on fit checks in front of the customer.

Fortunately the worst case it wasn't our machine shops mistake, it was the machine shop from the competition that we'd been forced into working with by our customer.

KENAT, probably the least qualified checker you'll ever meet...

 

[fcsuper]

Well, if there was a reliable why to note deburring without over-specifying corners and sharp edges, then I'm all ears. I think we are having this discuss because there isn't. Does ASME address this issue anywhere?

Matt
CAD Engineer/ECN Analyst
Silicon Valley, CA
sw.fcsuper.com
Co-moderator of Solidworks Yahoo! Group

 

[MintJulep]

An edge with a burr may be sharp, but it is not a sharp corner.

 

[israelkk]

The only way to do it is to develop a process with the manufacturer that will give the results needed. For example, for critical orifice sealing surfaces we have highly trained personnel who can tell by looking through x10 to x40 magnification if the sealing surface are OK.

We add to the drawing a note to check and approve the sealing surface under magnification by our personnel. When the manufacturer wins the bid, the trained checker visits the manufacturer facility, explains what he wants and the manufacturer machine samples until the results are approved by the checker under magnification. When the manufacturer succeed and understand what he is expected to achieve he gets an OK to start production. After production all parts are checked again by our personnel.