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Help for newbie for threaded hole - Looking for tutorial regarding creation of threded hole in ViaCad 9
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orbitcoms  
#1 Posted : Friday, November 6, 2015 11:26:42 PM(UTC)
orbitcoms

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Hi,

I have looked through tutorials on the web and cannot locate an appropriate tutorial that shows how to create a threaded hole in solid object.

Would anyone have a link that has a clear explanation of how this is done.

Thanks
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horst.w  
#2 Posted : Saturday, November 7, 2015 4:20:25 AM(UTC)
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I don't believe a tutorial like this is existing.
but yo can solve your problem by creating a screw (many examples are online) and fit it together with your solid object and than subtract the screw from your objekt.
Works fine!

horst.w

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horst.w  
#3 Posted : Saturday, November 7, 2015 4:28:27 AM(UTC)
horst.w

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Originally Posted by: horst.w Go to Quoted Post
... and than subtract the screw from your objekt.



If needed, you can practise with this thread ...

H.
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L. Banasky  
#4 Posted : Saturday, November 7, 2015 11:49:40 AM(UTC)
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You can also download threaded items set screws, bolts screws etc. from McMaster-Carr, and then subtract them from your solid.


http://www.mcmaster.com/#92313a426/=zpistz

Edited by user Saturday, November 7, 2015 12:54:49 PM(UTC)  | Reason: Not specified
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thanks 1 user thanked L. Banasky for this useful post.
gensmenger on 11/7/2015(UTC)
CNC_Kid  
#5 Posted : Monday, December 14, 2015 5:46:38 PM(UTC)
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Originally Posted by: L. Banasky Go to Quoted Post
You can also download threaded items set screws, bolts screws etc. from McMaster-Carr, and then subtract them from your solid.


http://www.mcmaster.com/#92313a426/=zpistz


this wont yield a thread spec though as you'll end up with zero clearance. i wish VC-pro had a threading tool that mapped back to the common thread specs.

in the past i made a "cutter" with correct tooth angle (triangle basically), then i created a spiral of correct thread pitch and diameter, then used the triangle to follow the path creating 3D object, then you can use that to cut.

if you use the mcmaster way, just be sure to specify actual threading spec to the machinist, etc.
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Craig  
#6 Posted : Wednesday, December 16, 2015 2:40:49 AM(UTC)
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Create a helix, change the dimensions to your desired thread od and pitch (make it longer than you need).

Select the helix and hold the pointer at the beginning, while the tool tip says end point press the C key until the workplane indicator is orientated correctly (see attached images).

Turn the workplane snap on and create your thread profile at the beginning of the helix, select the one rail solid sweep tool and sweep your thread profile along the helix.

You can then subtract that from a solid cylinder and that becomes your thread blank that you can use for bolts. You can use it to make threaded holes by subtracting the thread blank from the desired solid holes.

Make sure you chamfer any holes or cylinders before subtracting, my examples are not to any dimensions so don't be confused by that.

Edited by user Wednesday, December 16, 2015 2:50:25 AM(UTC)  | Reason: Not specified

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CNC_Kid  
#7 Posted : Wednesday, December 16, 2015 9:02:50 AM(UTC)
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the methods shown thus far i do not believe make any thread to spec. peaks of outer treads (bolts) are typically flattened (same for peaks on inner threads), and the valleys on bolts are usually rounded (same on inner threads).
but, i guess it depends on the thread type (acme, unc, unf, npt), etc. if you are just making a internal thread for a bolt you buy later, then i suggest you call out the threading on the prints so machinist knows how to cut them (be it CNC or other). the machinist i use, i simply bore holes of bolt minor diameter and then place call-outs to spec the threading.

so, with all the variances between thread types it would be nice if the "hole" tool had a threading option that was able to cut internal threads to various specs, and a complimentary die tool for cutting bolts. where's Tim O to get this going ??

all that said, you can manually do it, make the triangle (polygon) match an actual thread cut, etc, just tedious when you have varying thread types, but then again, i guess you can build your own library.

i have not tried yet, if you make a bolt (cylinder with OD cut with threads) does VC allow you to then change the diameter of that cylinder?

Edited by user Wednesday, December 16, 2015 9:09:52 AM(UTC)  | Reason: Not specified

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L. Banasky  
#8 Posted : Thursday, December 17, 2015 3:45:18 AM(UTC)
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I did these threads years ago with dimensions from Machinery's Handbook.
The profiles are for Internal and External threads.
I had to convert from .co to .sat and then .sfx
If anyone wants a size listed below,reply.
Larry

Edited by user Thursday, December 17, 2015 2:41:12 PM(UTC)  | Reason: Not specified

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Craig  
#9 Posted : Friday, December 18, 2015 4:04:17 AM(UTC)
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Originally Posted by: CNC_Kid Go to Quoted Post
the methods shown thus far i do not believe make any thread to spec. peaks of outer treads (bolts) are typically flattened (same for peaks on inner threads), and the valleys on bolts are usually rounded (same on inner threads).


You adjust the profile to suit your thread type, radiuses, angles, etc.
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CNC_Kid  
#10 Posted : Friday, December 18, 2015 9:05:42 AM(UTC)
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Originally Posted by: Craig Go to Quoted Post
Originally Posted by: CNC_Kid Go to Quoted Post
the methods shown thus far i do not believe make any thread to spec. peaks of outer treads (bolts) are typically flattened (same for peaks on inner threads), and the valleys on bolts are usually rounded (same on inner threads).


You adjust the profile to suit your thread type, radiuses, angles, etc.


agree, but it's manually intensive. depending on machine shop/place/person threaded holes will just be holes of bolt minor diameter. so, i guess it depends on the receiver of the CAD.

i myself would like to see a threading tool added to the software (maybe just the Pro version), it would really be a nice bonus to have.
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