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Mating Help

Question asked by Robert Lankford on Nov 9, 2012
Latest reply on Nov 12, 2012 by Randy McNurlin

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I am attempting to take a VERY complex 2D AutoCAD drawing and wrap it around a drum. The wrap feature isn't doing anything, so I assume my only option is to unfold/fold. Now I don't have circles, and I have NO clue what the best way is to mate to these "holes". I tried putting a ref. point in the center of the hole, which works, but I would have to do EVERY one! Probably 100X. This is not the first time this issue has come up, so I figure it is time to address it...

Here is a picture of the actual assy. I attached a MUCH smaller (and random) assembly that illustrates my issue. Thanks in advance!

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Jeremiah Feist Nov 9, 2012 3:36 PM
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from the image, it appears the holes follow a simple pattern. I would measure the first hole and the spacing in the acad file and just re-create them as patterns (feature patterns rebuild faster than huge sketches as well).
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Paul Cullen Nov 10, 2012 10:38 PM
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Hi Robert

I have done this in SW 2013 but because you are using an earlier version there is no point in me ataching the files, but I will try and explane the steps I took.

I used your sketch 7 as the basis for my part, so first of all I created an extrude of a rectangle the same size as the outter dimensions as your sketch 7, then using sketch 7 I did a split so as to split the extrude
I then used the flex tool to create a cylinder
this then ment that your original sketch was wraped around the cylinder all be it that they were several different bodies
I then created a 3D sketch of where I wanted to put the holes picking the joints in the bodies to positions my sketch points

I now had the positions for the holes, I then did a combine bodies to make one continous pipe again, I then tried to use the hole wizard to place the holes in the cylinder using the 3d sketch but it would not work for me so I created a new 3D sketch for the hole wizard to reference
I then hid the 3d sketch of the points and inserted the hold wizard on the pipe surface and used the lines to constrain the points where I needed them, this then gave me the holes in the pipe to match your original sketch,

then in the assembly I mated your bracket in position over the hole and then used a feature driven patter to insert all the other brackets

There is probably a quicker way to do this but hopefully I have pointed you in the right direction.
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- Robert Lankford @ Paul Cullen on Nov 12, 2012 12:01 PM
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  I have never used flex or split, but it looks like this is what I was looking for. I'll give it a shot.
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Randy McNurlin Nov 12, 2012 5:14 PM
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I extruded a short cylindrical surface out of the bottom of your lug. The surface needs to be equal in diameter to your 1/2" holes on the drum. Then a tangent mate worked to place the lug correctly.
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