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Old 08-24-2017, 08:14 PM   #1 (permalink)
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3d part in CAD help

Looking for someone to help me out with a 3d part I need drawn up in CAD.

I have the basic shape of what I want but need someone to help with the female ASA threads.
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Old 08-24-2017, 09:18 PM   #2 (permalink)
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Why do you want to add the threads to the model? If this is a machined part, the threads do not need to (and should not) be modeled. If this is a 3d printed part, it may be different (Im not too familiar with 3d printed parts.

Also, what program are you using?
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Old 08-24-2017, 09:56 PM   #3 (permalink)
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It will be machined out of aluminum but i want to 3d print it to test it out. I am just using autocad (really old version).
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Old 08-25-2017, 04:31 AM   #4 (permalink)
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Adding threads to the cad model will add to the filesize... Because all of the faces of the threads. That's why they are often let out. If you want to 3D print a test model, you could make the hole a bit bigger so that the tank fits... Otherwise you would have to draw the threads resonably oversize (0.2mm bigger diameter) or they won't fit at all.

I use solidworks, but i must admit i don't know how to draw threads... And it has never been an issue so far..
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Old 08-25-2017, 08:51 AM   #5 (permalink)
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okay thank you for you insight! ill just leave them out.
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Old 08-25-2017, 01:27 PM   #6 (permalink)
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Modeling threads in Solidworks is actually quite easy with 2016. 2016 Made a big leap with actual threads rather than just visual layers with the hole wizard. So if you wanted threads, you just click from the drop down menu in the thread wizard, select you profile to apply them to, and SW generates them. However, its not so easy for things like 1/2-14 NPSM (ASA threads?) which are not standard in SW. So, you have to pick a thread that is close and tweak the minor/major diameter and pitch. You can also draw a helical path and sweep it with the correct profile of the threads. So,it can be done. For 3D printing, even using SLS powder bed printers, we have had a hard time printing threads. But, for prototyping, you could do it, just don't expect a tank to screw in perfectly and hold for that matter. Here is something I whipped up with the thread wizard in 30 seconds that is close to ASA threads just to show you. I took a thread that was close and made the pitch 0.07142 and the major diameter that of 1/2-14 NPSM.
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File Type: jpg ASA Threads.JPG (32.2 KB, 35 views)
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Old 08-25-2017, 01:28 PM   #7 (permalink)
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Didn't see your last post. Got bored at work this morning and drew one up. Still have any interest? I'm not sure how to post files to the forum though.
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Old 08-25-2017, 01:30 PM   #8 (permalink)
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Quote:
Originally Posted by Dawg047 View Post
Modeling threads in Solidworks is actually quite easy with 2016..... Here is something I whipped up with the thread wizard in 30 seconds that is close to ASA threads just to show you.
Wow. I need solidworks. Autocad fought me for an hour to pull off the same thing.
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Old 08-25-2017, 01:39 PM   #9 (permalink)
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Fusion360 has similar features. It is made by Autodesk, and is free to small businesses and students.

I used to be sponsored by Solidworks, and learned most of my CAD skills on that awesome program. If you have access to SolidWorks, use it! If you don't, and are cheap like me, use Fusion360.

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Old 08-25-2017, 01:55 PM   #10 (permalink)
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I second what Ty says. Fusion360 is amazing for being free.
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