angle hole
angle hole
(OP)
I know this is drafting 101 but I haven't done one in awhile and I'm having a brain fart today.
I have a angled hole which I need to dimension. What is the best practice? Should do a projected view? Will this allow the machinist to find his edges. How would I dimension the angle? Should I do a section view and dimension to a quadrant? A section would allow me to dimension the angle. Maybe a combo of both?
I have a angled hole which I need to dimension. What is the best practice? Should do a projected view? Will this allow the machinist to find his edges. How would I dimension the angle? Should I do a section view and dimension to a quadrant? A section would allow me to dimension the angle. Maybe a combo of both?
Grant
Certified SolidWorks Associate
SW2009 X64 SP 1.0
Dell Precision T5400
Nvidia Quadro FX 5600
Xeon 2.5GHz Quad Core, 4GB RAM
XP Pro X64 SP2.0





RE: angle hole
Don't forget the size of the hole.
Chris
SolidWorks 09, CATIA V5
ctopher's home
SolidWorks Legion
RE: angle hole
Also, idealy the 9.2 dimension would be replaced by one from a surface (preferably datum) so shown in either the bottom left view or the proposed sectioned view. The 9.2 dimension is to an edge, which is poor practice, especially if you call up for sharp edges to be removed since it doesn't give a good measurement origin.
General comment, maybe you only put the hidden lines to try and better explain for this question, but the drawing is a bit buzy so I'd drop most if not all the hidden detail on the finished drawing.
KENAT,
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RE: angle hole
What feature do you have on your part that you can dimension your hole from?
Projected views and sections both work, but my primary concern would be how the fabricator and inspector are going to fixture your part and measure from your reference features. It may be worth adding a reference feature, depending on the accuracy you want.
RE: angle hole
FYI that is not the final drawing and it's on the wrong template just used it as a visual ref. for explaning my question.
I thought the 9.2 dim was not the best way to do it since it was an edge. Im still confused as to what I can do to define the 9.2 dimension.
If I picked a datum surface say the bottom face (see pic) how would I define the hole location?
Grant
Certified SolidWorks Associate
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RE: angle hole
From a manufacturing point of view that would be a far easier way to pick the part up than from an angled edge. In fact for any angles a tooling hole is often the best way to go or for 3D shapes a notsa ball.
I am sure someone will point out this does not comply with some standard or another.
RE: angle hole
Grant
Certified SolidWorks Associate
SW2009 X64 SP 1.0
Dell Precision T5400
Nvidia Quadro FX 5600
Xeon 2.5GHz Quad Core, 4GB RAM
XP Pro X64 SP2.0
RE: angle hole
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: angle hole
http://fil
ajack, I'm not sure I quite follow your suggestion, effectively make the set screw hole a datum which the angled hole is perpendicular to with a given angle?
KENAT,
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RE: angle hole
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: angle hole
If you have one or more angled faces you can tip the part so the working face in horizontal or tip the head on the machine and use the "tooling hole" as a reference point, it does not even have to be inline you can dimension the offset.
In the same way as you use a notsa ball when changing the stylus on a CMM.
RE: angle hole
Thought about that way but was unsure if dimensioning the centerline like that would be acceptable. Again we machine in house so I could do what ever but I like to try and maintain stardard drafting practices to keep my skills up.
I'll do it like that and the add a projected view to get the other locating dim. and to add the hole call out.
Thanks again for your help guys. I owe you a beer...
Grant
Certified SolidWorks Associate
SW2009 X64 SP 1.0
Dell Precision T5400
Nvidia Quadro FX 5600
Xeon 2.5GHz Quad Core, 4GB RAM
XP Pro X64 SP2.0
RE: angle hole
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: angle hole
KENAT,
Have you reminded yourself of FAQ731-376: Eng-Tips.com Forum Policies recently, or taken a look at posting policies: http://eng-tips.com/market.cfm?
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: angle hole
Grant
Certified SolidWorks Associate
SW2009 X64 SP 1.0
Dell Precision T5400
Nvidia Quadro FX 5600
Xeon 2.5GHz Quad Core, 4GB RAM
XP Pro X64 SP2.0
RE: angle hole
Grant
Certified SolidWorks Associate
SW2009 X64 SP 1.0
Dell Precision T5400
Nvidia Quadro FX 5600
Xeon 2.5GHz Quad Core, 4GB RAM
XP Pro X64 SP2.0
RE: angle hole
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: angle hole
RE: angle hole
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: angle hole
When you can find a way to completely satisfy all 3, that's best.
GRUNT, I was thinking the left hand view would look something like this. ht
However, depending on function what I've put may not be best, ajacks may be better though using a threaded hole as a datum isn't ideal. As ewh says it helps machinist at the expense of inspection. If manufacturing wants to calculate the equivalent dimensions to do it that way it's up to them, so long as it meets drawing requirements. The machinist doesn't have to use the dimensions on the drawing to make the part, the finished article just has to meet them. Obviously it's better when they're the same but this isn't always easy/possible.
KENAT,
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RE: angle hole
The "logic" behind this is all parts are manufactured but usually only a percentage are inspected in production or in the case of much tooling/ moulding only the end product is usually inspected not the parts that make the tool/mould.
I am not saying that is right or wrong, just the way I think.
RE: angle hole
However, at least we both agree on function first! Without fully understanding the function of the OP's part it's difficult to say which of our approaches is best, or maybe there's another way that better captures function.
KENAT,
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RE: angle hole
Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services
www.infotechpr.net
RE: angle hole
This is whey I kept bringing up the function question.
KENAT,
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RE: angle hole
You are right about the function. I would need to know how the part is assembled and used to be sure what approach I would you. I made some assumptions in making my example.
Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services
www.infotechpr.net
RE: angle hole
I believe you can place the one of the locating dimensions at the intersection of that CL and the left edge of the part in the base view.
The X dimension is easily taken from the left or right edge visible in your auxiliary view. The hold size is also taken from the auxiliary view.
That's how I might approach this anyway. It should show the inspector and machinist how to set up the part as well.
RE: angle hole
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: angle hole
That's how I've saw it done a few years back while working for UTC.
I agree that dimensioning to hidden lines is a no-no.
RE: angle hole
Your pdf is wrong, D should be part of the TP tolerance of the 4.5 hole, top middle of drawing.
I would box the 14.633 dimension, put a boxed dimension to the hole from A on the left hand view and put ABC on the 4.5 dimension, middle top view
Steve
RE: angle hole
Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services
www.infotechpr.net