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Dale_Rosema
23-Emerald III
Dale_Rosema23-Emerald III
23-Emerald III
August 16, 2013
Question

Assembly cut?

  • August 16, 2013
  • 2 replies
  • 2769 views

Is this a cadidate for an assembly cut?

Actually my parts are both curved, but I thought I state simple with two pieces of tubing, one at a 45 degree angle to the other. The one at the 45 will be cut before being welded to the other (no holes in the parent parent part - just structural). How would you go about making the cut to the 45 degree piece?

assembly_cut.jpg

The material that needs to be removed in order to nest them together before weld.

assembly_cut2.jpg


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2 replies

T
TomD.inPDX17-Peridot
17-Peridot
August 16, 2013

This is a candidate for the top down design process. You would make the edits in the assembly with the 45 degree tube active. You can use the vertical tube for its diameter reference, location, and even the projection plane.

Just remember that you now have a dependent reference. You can unlink it manually when you are back in the 45 degree part but sustainability is a nightmare. You have to decide if top-down design models are acceptable in your organization.

You can also consider a skeleton model that holds all the tube centerlines. In this way, you can reference only one model for all your assembly references in lower level parts. This is normally much preferred since you will minimize the number of dependent files to 1 (+assembly).

I am working on a bike frame myself (a reverse engineering session for posterity) and I am not using separate tubes. I am modeling the weldment at a part level. If I need tube prep drawings, I would use assembly cut to cut up the master part into the individual pieces. This may seem backwards, but in this way, the "master" is a part file with the prep'd tubes as subordinates rather than masters. In this way, I am reducing the corruption penalty and the final level assembly part count is actually much smaller. The individual tubes are now independent from the overall assembly but dependent on the inseparable weldments which becomes the parent. If all that makes sense.

Dale_Rosema
23-Emerald III
Dale_Rosema23-Emerald IIIAuthor
23-Emerald III
August 20, 2013

Now if the tube on the left (parent tube) had a bend radius, how would you use it to remove the material from the 45 degree tube (child)?

T
TomD.inPDX17-Peridot
17-Peridot
August 20, 2013

A datum point at the radius center; optionally an axis.

V
vmráz12-Amethyst
12-Amethyst
August 21, 2013

Tubular construction with top-down design:

Check this video:

http://www.e-cognition.net/pages/Tubular.html

Usually l have problem with windows media player on this website. Download new version or download video directly due the text row above the video window.

Hope it will be helpful...

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