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Need help how to model this part

michael_mcclainmichael_mcclain Member Posts: 191 PRO
Hello all, 

I have to redraw this old model of a shifter boot for a new manufacturing process and I just can figure out how it was modeled before and how to begin to model it new.

https://cad.onshape.com/documents/9264a7446ebc32f0a3f486ca/w/611841cb3bcefcddf7732348/e/75ae4918184800288fca15d4

The goal is to match the inner dimensions closely enough and to set up the model for variable thickness to allow flexibility with semi-rigid materials.

I believe the original model was done in Creo, but I am not sure as I only have a Step file.

Thank you for any help and modelling tips. I just can't seem to figure this one out.



Best Answers

Answers

  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 3,408
    edited June 2019
    Doesn't look overly-complicated - how accurate does it need to be? For example, the sides are not straight/parallel.


  • michael_mcclainmichael_mcclain Member Posts: 191 PRO
    It doesn't have to be point for point accurate. I am not sure of some of the design intent from the original model. I noticed that some things aren't symmetrical and don't seem to line up in a way that makes sense to me.

    I can make the simple prismatic version of the part, but when it comes to all the fillets and rounds in odd places I am at a loss. There is also the base which is warped in a way that I can't figure out how to replicate it.

    I feel like my modeling brain is blocked on this particular model and I need a gentle nudge in the right direction to begin it.
  • michael_mcclainmichael_mcclain Member Posts: 191 PRO
    @jakeramsley this is exactly the nudge I need! I'll try some of these ideas out later and see what solution I come up with.

    I had also thought to surface model and thicken later, but achieving the various surfaces was the part I just couldn't wrap my brain around.

    Thank you for the great help!
  • bruce_williamsbruce_williams Member, Developers Posts: 546 PRO
    @michael_mcclain thanks for posting.  We all can benefit from the challenges.

    @NeilCooke
    what a great approach!  mastery using the palette of Onshape tools.  I especially like the base sketch with mate connectors used for later sketches and the projected curve for bottom.  A lot to learn from this one!
    www.accuratepattern.com
  • NeilCookeNeilCooke Moderator, Onshape Employees Posts: 3,408
    @bruce_williams - after your very generous praise, I went back to marvel at my model only to notice that there was some dodgy faces at the bottom. Took a few goes to rectify the issue, but adds some more tricks to the model. Please use the latest version. Thanks!
  • owen_sparksowen_sparks Member, Developers Posts: 2,660 PRO
    Now make it bend...
    Business Systems and Configuration Controller
    HWM-Water Ltd
  • michael_mcclainmichael_mcclain Member Posts: 191 PRO
    @NeilCooke Thank you very much!

    I went through your model and I have to say it is some great work. I see a few tricks I will have to incorporate into my workflow. I would have never thought of the projected curve for the sweep path. I forgot that tool existed.

    This is exactly what I needed and I learned a few new things along the way. Onshape forum and support is the best!

    P.s. @owen_sparks If you want to have a go and throw in some flexibility then be my guest. Might as well throw in the whole shifter and linkage while you are at it haha.
  • larry_haweslarry_hawes Member Posts: 448 PRO
    I went through each feature one by one and was amazed at the approach. Might have actually learned something but most was way over my head. Still very nice work Neil.
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