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MAking a screw (#2555)
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zumer  
#21 Posted : Sunday, September 6, 2009 10:12:09 PM(UTC)
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Thassit, Walt. Congrats!
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wdp67  
#22 Posted : Sunday, September 6, 2009 10:28:42 PM(UTC)
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Ok played around some more and I almost have it. But if you look close, there is a little step where the inside fillet meets the next thread
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wdp67  
#23 Posted : Sunday, September 6, 2009 10:29:45 PM(UTC)
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Dang cant really see it, but I could not upload the vc file.
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wdp67  
#24 Posted : Sunday, September 6, 2009 10:33:16 PM(UTC)
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see this pic.
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zumer  
#25 Posted : Sunday, September 6, 2009 10:42:44 PM(UTC)
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Did you use the fillet tool for the profile? Draw the flanks, then copy them one pitch length. Fillet the original and the copy, then enclose the original flanks, the nose fillet and the valley fillet. You've got the valley out of register somehow, because the fillet should meet symmetrical flanks.
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wdp67  
#26 Posted : Sunday, September 6, 2009 10:45:35 PM(UTC)
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I think so, I was just looking at the lines that you drew. The top line that is .125 long, shouldnt that be 90 degrees from the longer line? I clicked on it and it says it is 8. something degrees in the angle box. If I make it 90 degrees to the other do you think that will take care of it?
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wdp67  
#27 Posted : Sunday, September 6, 2009 10:50:19 PM(UTC)
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Nope that did not work
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wdp67  
#28 Posted : Sunday, September 6, 2009 11:03:08 PM(UTC)
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I think I fianally friggin got it check out this pick!!!
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zumer  
#29 Posted : Sunday, September 6, 2009 11:07:44 PM(UTC)
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Looks right, do it again to make sure you know how you did it!
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wdp67  
#30 Posted : Sunday, September 6, 2009 11:20:37 PM(UTC)
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Thanks a bunch, I will have to try it again in the morning as its hard to type with my eyelids hitting the keyboard;)

Thanks again!!

Walt
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wdp67  
#31 Posted : Monday, September 7, 2009 12:12:53 AM(UTC)
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OK I couldnt resist!! I had to show off my evening of learning with this 3D drawing.

Thanks for everyones help on this!

Walt
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ttrw  
#32 Posted : Monday, September 7, 2009 12:30:00 AM(UTC)
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Originally Posted by: wdp67 Go to Quoted Post
I could not upload the vc file.


Someone else who feels my PAIN! :)

I think it's partly due (upload problems) to the file being rather big, but I don't get why this stupid crippled forum server disallows this, because after all, being able to share and discuss work is a sure fire way to increased understanding and a better product.

Awesome bolt wpd! Any chance of adding to my thread with a tutorial to how you made yours?

best,

Tom :)
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wdp67  
#33 Posted : Monday, September 7, 2009 9:29:47 AM(UTC)
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Thanks ttrw, I will see what I can do as foar as a tutorial. Might take me a little while but I will try!

I could not have done it without all the help from others.

Walt
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wdp67  
#34 Posted : Monday, September 7, 2009 3:24:54 PM(UTC)
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Here is my feable attempt at helping others with drawing the bolt. I have struggled with this for a long time, and now that I somewhat figured it out, with a lot of help on here I might add, I thought I would try to help others that may be struggling. I am just a hobbyist, so I am sure there are better ways to do it, but this is what worked for me.

Thanks
Walt
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wdp67  
#35 Posted : Monday, September 7, 2009 3:41:43 PM(UTC)
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I could not resist the temptation of drawing a nut to go along with the bolt.

Walt
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.3125-18 Nut.vc3 (1,610kb) downloaded 5 time(s).

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L. Banasky  
#36 Posted : Tuesday, September 8, 2009 8:30:44 AM(UTC)
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Originally Posted by: wdp67 Go to Quoted Post
Ultimatly I guess I need a step by step on how to do all this. I need to learn how to figure out what I need to draw and sweerp to get the various threads that I want to draw. IE 1/4-20, 10-32 etc.


Hi Walt,
I usually make a profile using data from Machinery's Handbook, Major Dia., Minor Dia, and Pitch Dia. I make one for external threads and one for internal threads.
I then make a "threaded rod" for external and internal threads, and use them for threaded parts and threaded holes.
I don't worry too much about the radius in the root on threads produced in metal, I don't have much experience with plastic threads, so I don't know. I cut threads in metal on the lathe using a single point tool with little or no radius on the end.
Enclosed are the files for 10-32, I have others if you are interested.
Larry
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10-32-EXT.sfx (323kb) downloaded 5 time(s).
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L. Banasky  
#37 Posted : Tuesday, September 8, 2009 8:44:57 AM(UTC)
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Found another old file for .5-13.
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L. Banasky  
#38 Posted : Tuesday, September 15, 2009 8:03:51 AM(UTC)
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Originally Posted by: wdp67 Go to Quoted Post
Like this?


Hi Walt,
I used your profile, added thread runout and chamfers for your .250-20 hex head bolt.
Larry
File Attachment(s):
this with chamfers and runout.vc3 (772kb) downloaded 5 time(s).
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wdp67  
#39 Posted : Tuesday, September 15, 2009 11:26:46 AM(UTC)
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Thanks Larry, could you explain how to do that, I for one would like to know and I am sure others would be interested too.

Walt
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L. Banasky  
#40 Posted : Tuesday, September 15, 2009 2:12:12 PM(UTC)
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Originally Posted by: wdp67 Go to Quoted Post
Thanks Larry, could you explain how to do that, I for one would like to know and I am sure others would be interested too.

Walt


Hi Walt, I imported a CU2 file into your Viacad file to show the steps. It's just a generic thread. The chamfers are done with a revolve surface and a trim or subtract solid.
Larry
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