topic Re: Need advice on how to dimension angled holes in Fusion Design, Validate & Document Forum

Need advice on how to dimension angled holes

Anonymous — Sat, 29 May 2021 15:46:26 GMT

Hi all,

I am having a complete mental block regarding dimensioning of the angled holes shown below.

The four holes are to be machined at a 12 degree angle. My first thought was placing a true-position callout at the hole centre-point on the surface (top view). This seems like it would be tricky for a machinist to gauge, however, made worse by the hole profile being elliptical on this view.

What would be the best way to dimension something like this for machining? Many thanks in advance!

Re: Need advice on how to dimension angled holes

TheCADWhisperer — Sat, 29 May 2021 15:56:11 GMT

How did you model the part?

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

When I have something I think might be tricky - I use the same modeling technique as my machining technique.

Re: Need advice on how to dimension angled holes

Anonymous — Sat, 29 May 2021 16:04:19 GMT

Hi TheCADWhisperer,

Please find F3D attached. The holes were made by creating angled cylinders from surface sketches and then using them as cutting tools against the main body. Maybe not the most efficient way, but the only way I can think of.

The holes will be used to guide partially threaded rods at precise angles.

Re: Need advice on how to dimension angled holes

rushabhthakkar_910 — Sat, 29 May 2021 16:53:36 GMT

Found a similar Topic in the Solidworks Forum.. Maybe it can help you...

Re: Need advice on how to dimension angled holes

g-andresen — Sat, 29 May 2021 17:55:16 GMT

Hi,

try this

günther

Re: Need advice on how to dimension angled holes

Anonymous — Sat, 29 May 2021 18:11:57 GMT

Hi Guenther,

Thank you for the reply! Out of curiosity, what DFM benefit would this provide over a true position callout on the surface and a reference angle? How would you infer the angle from this solution?

@rushabhthakkar_910 Thank you for the link! I can see he's got a kind of section view at an angle, but I can't work out how to translate that to my design?

Re: Need advice on how to dimension angled holes

rushabhthakkar_910 — Sat, 29 May 2021 18:34:22 GMT

For the angle part, maybe you can use the method that is maybe used to show a tapper Hole...

The usual method of dimensioning a taper is to give the amount of taper in a note, such as TAPER 0.167 ON DIA. And then give the diameter at one end, plus the length, or give the diameter at both ends and omit the length.

And for the Link, Actually I too was not able to make it as to how that Section View at an Angle was made... That's the reason I shared the link... Or else, I would not have shared the Solidworks Forum Link here.. And maybe helped you out with how to get that in your design...

Re: Need advice on how to dimension angled holes

g-andresen — Sat, 29 May 2021 18:59:39 GMT

Hi,

@Anonymous wrote:

How would you infer the angle from this solution?

this way

günther

Re: Need advice on how to dimension angled holes

Anonymous — Sun, 20 Jun 2021 06:37:52 GMT

Hi all,

Reviving a slightly old thread, but I have the answer from the (now chosen) subcontractor for this part. A true position call out referencing the centreline of the surface ellipse is correct. Depending on the size of the hole, they will fabricate a simple shaft gauge, which would sit in the hole and then measure it's true position at a given height. The alternative would be two true position callouts for both ellipses each side, but this is more time consuming to QC and can get messy in terms of inferred angles.

I hope this helps anyone who has this question in the future!