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draft angles with cylindrical corner radius
- Thread starter pjy
- Start date
MikeHalloran
Mechanical
That's the way I would read it.
If the radii are interpreted as portions of right circular cylinders, then they can't also be tangent to drafted surfaces, so you wind up with some awkward transitions.
Mike Halloran
Pembroke Pines, FL, USA
If the radii are interpreted as portions of right circular cylinders, then they can't also be tangent to drafted surfaces, so you wind up with some awkward transitions.
Mike Halloran
Pembroke Pines, FL, USA
ornerynorsk
Industrial
Depends on how it is specified on the drawing or in the model. It can be either way, and is up to the designer to specify. Corner or edge treatments in that situation should not be left unspecified.
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
- Thread starter
- #4
Thank you for your replies:
In this instance the customer has also provided a model.
The instruction for this job/ customer is "build to print" and a note on the drawing states "machined as shown".
- Pictorially, the radii appear to be cylindrical
- The model provided has cylindrical radii
- The note, draft angle "all around" contradicts the model provided
My intent is to machine cylindrical radii "as shown" and modeled since the note "all around" contradicts the model. Technically, it would be wrong either way I choose, since I will be disregarding the note "all around" on a drawing that takes precedence over the model.
In this instance the customer has also provided a model.
The instruction for this job/ customer is "build to print" and a note on the drawing states "machined as shown".
- Pictorially, the radii appear to be cylindrical
- The model provided has cylindrical radii
- The note, draft angle "all around" contradicts the model provided
My intent is to machine cylindrical radii "as shown" and modeled since the note "all around" contradicts the model. Technically, it would be wrong either way I choose, since I will be disregarding the note "all around" on a drawing that takes precedence over the model.
MikeHalloran
Mechanical
You might want to rough out just the detail on a piece of scrap, and show it to the customer before cutting his actual part, so adjustments can be made at little expense to anyone.
Mike Halloran
Pembroke Pines, FL, USA
Mike Halloran
Pembroke Pines, FL, USA
MikeHalloran
Mechanical
The customer presumably already 'saw' a model, and didn't understand what (s)he was seeing.
Most customers understand physical models in their hands much better than they understand visualizations of models on a screen or on paper.
Mike Halloran
Pembroke Pines, FL, USA
Most customers understand physical models in their hands much better than they understand visualizations of models on a screen or on paper.
Mike Halloran
Pembroke Pines, FL, USA
- Thread starter
- #8
I think the problem is that we are dealing with buyers or middlemen instead of engineers. This part was a casting, I suspect is unavailable or too pricey for the quantity needed, and which probably does not need draft angles... but the response to that question was in the form of a "machining" model. At least I have the model to support my interpretation.
Yeah, why would anyone expect a "buyer" or "middleman" to know anything about how something is manufactured? ![[upsidedown]](/data/assets/smilies/upsidedown.gif "[upsidedown] [upsidedown]")
"Just look for the lowest number on the screen..." is their mode of operation these days.
Proud Member of the Reality-Based Community..
[green]To the Toolmaker, your nice little cartoon drawing of your glass looks cool, but your solid model sucks. Do you want me to fix it, or are you going to take all week to get it back to me so I can get some work done?[/green]
"Just look for the lowest number on the screen..." is their mode of operation these days.
Proud Member of the Reality-Based Community..
[green]To the Toolmaker, your nice little cartoon drawing of your glass looks cool, but your solid model sucks. Do you want me to fix it, or are you going to take all week to get it back to me so I can get some work done?[/green]
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