Draft call out
Draft call out
(OP)
I have a part that is 1" ± .005 with plus draft accompaning it, what does this mean?
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RE: Draft call out
Typical on castings, forgings and moldings.
What if any drawing standard is the print to?
I'd think it means that the dimension at the 'base' of the draft is 1"+-.005. Elsewhere it's (1" +- change due to draft angle)+-.005.
Or something like that.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Draft call out
"+ Draft" = This lets the manufacuturer know that the draft gets larger as it gets farther from the point where the dim it specified. The draft angles outward from the dim.
"- Draft" is the the large side, where the draft gets smaller from the dimensioned point. The draft angles inward from the dim.
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
&
RE: Draft call out
Can you manufacture the part with draft within the noted tolerance? This means having 1 inch at the say bottom and have .995 at the top of the part?
RE: Draft call out
http:
SeasonLee
RE: Draft call out
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
&
RE: Draft call out
RE: Draft call out
A. For +draft application
The draft is added to the dimension for external dimensions
The draft is removed from the internal dimensions
B. For –draft application
The draft is removed from the dimension for external dimensions
The draft is added to the internal dimensions
C. Application with both +draft and –draft
You may find out the similar result from the book : Chapter 7 figure 7-76 Print reading for engineering technology by David A. Madsen
SeasonLee
RE: Draft call out
Please see how I would interpert option B in the PDF. I know that this part can not be made due to the center undercut. Please tell me what I am missing.
RE: Draft call out
The draft is added to the internal dimension but you are removing from the dimension, so the part can't be released from the tool.
SeasonLee
RE: Draft call out
RE: Draft call out
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
&
RE: Draft call out
On my models, I put in the draft to start with, so it is clear what I'm talking about when I use those terms on the drawing.
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
&
RE: Draft call out
This will be exactly same as (C) + draft.
SeasonLee