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  1. #1
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    Default Drawing a U-Bolt in isometric Drawing?

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    Hi, I am trying to draw a "u bolt" in an isometric drawing. I found one solution, that served the purpose of giving the customer the general idea of the stands we are trying to sell them, but I'd like to know if there is a way to draw it properly.

    I have attached a pdf to show what I came up with. Pipe Stands.pdf The only way I could think to get it to work (look right) in isometric view was to draw to vertical lines, make an arc across them with the elipse\isocircle, and then use the path array to fill the U shape with the isocircles. This keeps the tubular shape, and the number of circles resembles bolt threads.

    My problem is that the u-bolt is only threaded on the ends, the arched part should be smooth. Since this u bolt is to clamp fiberglass pipe to the stand, those threads (in my drawing) could cause damage. In this instance, I just explained this in the email to the customer, but I'd like to find a way to draw it proper.

    Does anyone know of a way I can accomplish this? Thanks in advance for your time. (BTW, I learned to do those hex nuts from another poster on this site... Love this site!)

  2. #2
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    3D U-Bolt Iso.jpg
    3D U-Bolt: Solid model as drawn in plain AutoCAD.
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    2D U-Bolt Iso.JPG
    2D U-Bolt. Created via the SOLPROF command from a 3D solid model in plain AutoCAD.
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  4. #4
    Luminous Being JD Mather's Avatar
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    Model in 3D as suggested and make your life easier.
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  5. #5
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    Hi, thanks for the reply. I think I can get the screw threads, I remember doing a tutorial on making a bolt in 3D over a year ago. Part of my problem is that after learning and doing this extensively for a brief period, I went about a year or so without doing any cad drawings, except simple line drawings of tank batteries using symbols, so I've forgotten a lot.

    What is the best way to go about making that in 3d, (I'm assuming you just draw the U and extrude a circle at the end to get the basic shape?), and then get it in with the rest of the items in my isometric drawing?

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    Luminous Being JD Mather's Avatar
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    Sweep might be easier than Extrude.
    You most likely don't need true helical threads (by the time you zoom out you cannot tell anyhow), use a simple revolved subtract (or better yet, just revolve that portion and only sweep the u shape).
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  7. #7
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    Quote Originally Posted by JD Mather View Post
    Sweep might be easier than Extrude.
    You most likely don't need true helical threads (by the time you zoom out you cannot tell anyhow), use a simple revolved subtract (or better yet, just revolve that portion and only sweep the u shape).
    I can figure out the threads part. But I don't know how to draw the object in 3d and then position it so that it looks the same as the items drawn in isometric view. I tried just sweeping the U drawn in iso, and then adding the helix to it, but even though I drew a circle (not iso) and rotated it on the x axis, after sweeping it it appears to be an elipse instead.

  8. #8
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    You are aware that you can either rotate the object and/or select one of the predefined isometric views to achieve the desired results.

    Yes, appearances can be deceiving. But you know for a fact that you swept a circle so no need to second guess yourself. Remember that you are not drawing a 2D isometric circle.
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  9. #9
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    It wasn't the appearance, I must have done the elipse/iso circle on that without realizing it. I couldn't get it to sweep at 1st, (forgot I had to rotate my circle 90 deg ) so I decided to start over with a U not drawn in isometric, I think it was at this point I realized I just need regular circle, and never went back and changed my mistake.

    Thanks for all the help guys, it's not perfect, but I just need to play around with the helix command and sweep command to figure out how to make it look better on the threads, the tutorial I followed had me sweep a rectangle along the helix to created the threads, so the squared threads make too many lines causing that part to look way dark. But I think I have the jist of it.

    I tried to rotate to get it in line with the rest of the drawing, but It wasn't working for me. Probably need to go back and review the angles for isometric along the y and z axis. But I got it working drawing the U in isometric and then following your advice to get the threads.

  10. #10
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    From your description it sounds like you are making this way more involved than it needs to be for a simple pictorial view. Sometimes newcomers to 3D would be better off doing everything flat in a SE isometric view then rotating the finished model. But it's your drawing so do it any way that works best for you.
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