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Questions on alignments

CP2492
The part that is coming up is long tube with 6 componets welded onto the piece. The componets have holes in them where we will use the mating piece to make sure everything aligns properly. My question is if you were to use CMM/faro arm for this type of part. Would it just be best to plane off one of the componets, create a line, touch off the circle to create the alignment. Then pick each circle up to check each position and if I wanted to check straightness create a line of all the circles. I am newer to PCDMIS/CMM in general, there is no GD&T to this print but it seems to be perfect opportunity to train more.

I also have thought if the weldment has warped the part so bad, would it be best to to create cylinder by touching all the circles or just creating planes and have each circle project to that plane if the faces are warped?

Thanks
  • you've got a helluva question here.
    my thoughts are this:
    1. use the tube itself, check it as a cylinder and level/origin to it. this creates a long axis you can now use to measure everything else.
    2. then grab one of the welded features/"holes in them" and use that as your clocking feature. i would suggest whatever one you think has the most critical component being connected to it.
    3. then measure the rest of the features as you need.

    without even seeing this thing i would lean toward using a Faro arm to check this kind of a component.
  • If the tube isn't straight because of the warping, you'll probably have better results measuring a series of circles rather than a cylinder object. You can construct a cylinder with them afterwards, or just extract their centerpoints and use a best fit line for leveling.
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