Inventor General Discussion

Inventor General Discussion

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Valued Contributor
jddrinkwater
Posts: 61
Registered: ‎01-03-2012
Message 1 of 7 (1,185 Views)
Accepted Solution

Add margin/offset to part edge with hole pattern

1185 Views, 6 Replies
02-01-2013 12:59 PM

We have several chain guards which we punch from sheet metal.  We recently changed our practice to punch a hole pattern in the part rather than weld in a mesh screen - saves shop assembly/fab time.  See the attached 2 parts.

 

My question: Is there an automated way of delelecting all holes within X" of the part edge.  Currently we have to go through one by one and it takes a lot of time.  I need some suggestions on how to model this part more efficiently.  As you can see, the designer of the new part got lazy and did a rectangular pattern.  The goal would be to have a consistent margin around the full perimeter of the part more like the first.

 

Thanks,

John

 

Old Style:

 

Capture.JPG

 

 

 

New Style:

Capture.JPG

Start with the perforated area size, create the pattern, then create a sketch of the final size of the part.

Use the face tool, and it will fill in any partial holes.

See the attached part.

face.JPG

Distinguished Contributor
DRoam
Posts: 131
Registered: ‎01-03-2013
Message 2 of 7 (1,175 Views)

Re: Add margin/offset to part edge with hole pattern

02-01-2013 01:27 PM in reply to: jddrinkwater

One possibility would be to actually make the hole pattern LARGER so it actually extends beyond the part. It would make holes in a larger perimeter than you want, like this:

 

One.png

 

BUT, then you could create a new extrusion subsequent to the holes which is basically the shape of the non-perforated perimeter that you want to remain untouched. You would create a sketch with the perimeter offset like this:

Two.png

 

Then, extrude it to re-fill the perimeter like this:

Three.png

 

 

Don't know if this works for you situlation but it's one possibility. Hope that helps! :smileyhappy:

Valued Contributor
jddrinkwater
Posts: 61
Registered: ‎01-03-2012
Message 3 of 7 (1,168 Views)

Re: Add margin/offset to part edge with hole pattern

02-01-2013 02:13 PM in reply to: DRoam

Good suggestion!  We were playing with it like that, but since we are punching the sheet metal witha circular die, we need to have full holes.  the half circles will have our CNC programmer screaming at me :smileyhappy:.

*Expert Elite*
JDMather
Posts: 27,044
Registered: ‎04-20-2006
Message 4 of 7 (1,163 Views)

Re: Add margin/offset to part edge with hole pattern

02-01-2013 02:34 PM in reply to: jddrinkwater

Delete Face with Heal on the partial holes might be a little less work than finding and suppressing pattern instances.

Too bad Inventor still doesn't have a boundary fill pattern.

http://forums.autodesk.com/t5/Inventor-IdeaStation/idb-p/v1232

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Valued Contributor
jddrinkwater
Posts: 61
Registered: ‎01-03-2012
Message 5 of 7 (1,149 Views)

Re: Add margin/offset to part edge with hole pattern

02-01-2013 05:56 PM in reply to: JDMather

Good idea,  I was thinking also of combining DRoam's plan with one more step: create a new sketch on the face with multiple partial holes, project geometry, then use face to fill in the partial holes.

 

We were searching high and low for a boundry pattern or some way of using a sketch profile to drive a selection filter for which points to include/exclude from the hole feature.

 

It looks like the short answer is not solution out of the box. Oh well...

Valued Mentor
mpatchus
Posts: 476
Registered: ‎10-22-2008
Message 6 of 7 (1,117 Views)

Re: Add margin/offset to part edge with hole pattern

02-04-2013 05:34 AM in reply to: jddrinkwater

Start with the perforated area size, create the pattern, then create a sketch of the final size of the part.

Use the face tool, and it will fill in any partial holes.

See the attached part.

face.JPG

Mike Patchus

Inventor 2012 SP3 ~ Vault Pro 2013
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Valued Contributor
jddrinkwater
Posts: 61
Registered: ‎01-03-2012
Message 7 of 7 (1,099 Views)

Re: Add margin/offset to part edge with hole pattern

02-04-2013 01:07 PM in reply to: mpatchus

Awesome!  That will work for us.  Thanks!

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