got bored at work and for the hell of it i made a 3d drawing of a 5.56 case, did you know that all govt/nato cartridge and bullet specs are public info?

just found it interesting. thinking about making my own snap caps.

Very nice! What'd you use to draw it? Autocad?

thank you! solidworks

there's the finished product

What's the ring on the inside of the brass for?

 

ETA: Is that where the head starts?

im not sure what you mean?

that shows it with out the radius lines if thats what you meant

In the first pic there are radius lines on the inside of the brass, but I didn't know what it signified.

 

Very nice looking drawings!

yup thats all they, were thank you

What's the ring on the inside of the brass for?

 

ETA: Is that where the head starts?

 

If you are referring to the heavier area of the case ahead of the case head it is the case web. In many rifles a portion of the web is left unsupported thus it must be heavier to contain pressure.

Gonna make your own snap caps? Outta what?

Probably alum 6061 that or brass

You've got the machining capability?

wow....amazing...

yea i run a machine shop in bayville i have cnc lathes and mills ive made parts for the ocean county swat team before and some other small stuff ... i want to make my own 4 rail handgaurd too

yea i run a machine shop in bayville i have cnc lathes and mills ive made parts for the ocean county swat team before and some other small stuff ... i want to make my own 4 rail handgaurd too

 

High density polypropylene inserted in to the primer pocket after removing the primer works fine. In leiu of polypro you can even use a pencil eraser.

High density polypropylene inserted in to the primer pocket after removing the primer works fine. In leiu of polypro you can even use a pencil eraser.

 

awesome thank you thats a great idea

I actually was messing around with a 9mm in Autodesk Inventor to get familiar with the program.

 

I have to go back and fix the primer area, I couldn't find those dimensions. Next time I go shooting I'll cut used round. I also want to do the imprint. But I'm still learning inventor, I know Pro/E much better.

 

 

I was trying to render it, but apparently my CPU fan is adequate and my CPU nearly cooked itself.

I actually was messing around with a 9mm in Autodesk Inventor to get familiar with the program.

 

I have to go back and fix the primer area, I couldn't find those dimensions. Next time I go shooting I'll cut used round. I also want to do the imprint. But I'm still learning inventor, I know Pro/E much better.

 

 

I was trying to render it, but apparently my CPU fan is adequate and my CPU nearly cooked itself.

 

Nice man it looks great I know that feelin sometimes when I'm doing large screws /worm gears or a knurl on a large shaft I'll just go to lunch while it's rendering lol the one time I came back from lunch to find the cooling fan fell off the CPU bc the glue melted off of it ... I'd offer help but idk either of those just solid works but if I come across the dims I'll be sure to send them to you.

Wow that's awesome

I'd offer help but idk either of those just solid works but if I come across the dims I'll be sure to send them to you.

 

Thanks.

 

Solidworks, Pro/E and Inventor are all pretty much the same. Pro/E is what my school teaches, so I have learned a lot. I'm in the Autodesk Student Expert program for my school too, so I'm starting to learn it. I've had sometime with Solidworks too, really enjoyed it.

 

The hardest to learn by far is Pro/E. Then comes Solidworks, which was designed partially by Aerospace engineers sick how badly Pro/E is to work with. Finally Inventor. Inventor has a lot of great short cuts, and a very easy to naviage interface. It can also accept just about any file, be it Solidworks, Pro/E, IGES, STEP, etc etc. The simulation software is pretty good too. The downside is not too many companies are picking up on it because when people think Autodesk they think of just AutoCAD. I hope Inventor catches on, it really is a powerful product.

 

Do you have any experience with ANSYS? One of the projects at school is to model a 9mm bullet hitting an aluminum plate. There are some cool videos on youtube showing the effects between FMJ and JHP on various materials.

One of my previous clients used to use Solidworks & Ansys like crazy - they were an engineering firm. I had no clue about it all - I just installed the software for 'em

Nope never used ansys but it looks awesome ! I've used all the simulation software in solid works 2007 I just got 2012 and it has a lot more in it I haven't had time to dig in just yet

Nope never used ansys but it looks awesome ! I've used all the simulation software in solid works 2007 I just got 2012 and it has a lot more in it I haven't had time to dig in just yet

 

Solidworks is fun, I'm trying to see if they run the promo with SAE again for 2012 where students in SAE competitions can get a free version.

 

Last night I started on an AR-15 lower. Its going to take a while to make, but it should be fun.

I use ProE on a near daily basis for work (I have used Solidworks, but not extensively). While I'll agree that Solidworks is FAR more user friendly (and pretty) for new users, I find ProE to be much more powerful and stable, especially with more advanced functions. I've set up batch scripts before to take dimensional inputs from a text file and automatically generate the model and output specific data to a text file. I also somewhat regularly use the built-in feasability studies to make it tweak certain dimensions to give me the mass properties I'm looking for. It's much easier than sitting there tweaking 5+ dimensions on 3+ parts hoping I get lucky and stumble on the correct combination.

 

The one feature that I wish ProE had that Solidworks has is 3D extrusions. If what I'm trying to do doesn't fall under a combination of sweeps (loft to you solidworks people) and blends, I have to put so many extra datums to make the cut that I want to smash the computer.

 

Full Disclosure: I was raised in college on ProE (also used IDEAS, don't bother with it).

I thought for sure this was my 3rd chance to win an AR-15 in a raffle

I use ProE on a near daily basis for work (I have used Solidworks, but not extensively). While I'll agree that Solidworks is FAR more user friendly (and pretty) for new users, I find ProE to be much more powerful and stable, especially with more advanced functions. I've set up batch scripts before to take dimensional inputs from a text file and automatically generate the model and output specific data to a text file. I also somewhat regularly use the built-in feasability studies to make it tweak certain dimensions to give me the mass properties I'm looking for. It's much easier than sitting there tweaking 5+ dimensions on 3+ parts hoping I get lucky and stumble on the correct combination.

 

The one feature that I wish ProE had that Solidworks has is 3D extrusions. If what I'm trying to do doesn't fall under a combination of sweeps (loft to you solidworks people) and blends, I have to put so many extra datums to make the cut that I want to smash the computer.

 

 

I'm not bashing Pro/E or anything, its good for certain things. But I feel its starting to fall behind a bit. However, I think they are updating now that they have changed to "Creo." Maybe attempting to package the software like Autodesk?

 

I know how you feel about the datum planes, you start adding them, next thing you know its just datum planes and no drawing!

 

Full Disclosure: I was raised in college on ProE (also used IDEAS, don't bother with it).

 

NJIT? I'm taking a class this semster for IDEAS, from what I hear its painful at times.

I don't keep too up to date on the other software packages, so I don't know if they're falling behind, but I absolutely can't stand what they did with Wildfire 5 Drawing Mode. I've been using it for 9 months now and I'm still getting used to having to switch "ribbons" (I'll use the MS Office name for it) to be able to do anything. When I first started using it, I literally sat there for 15 minutes trying to figure out how to get an erased dimension back onto my drawing, and another 20 minutes figuring out how to show axes in a view. Irritating as all hell.

 

And yes, NJIT. Did IDEAS really give that away? LOL. They're probably the only ones left on this planet that use IDEAS. Good luck with it, it's extremely painful. On the plus side, you have to do almost nothing with it, and if you're good with ProE, IDEAS is easy, just frustratingly buggy. I guess you're in the Senior Design 1 class if I remember correctly. I think that's the only one that makes you use IDEAS. I'm guessing Harry is still teaching it if you're still using IDEAS.

I don't keep too up to date on the other software packages, so I don't know if they're falling behind, but I absolutely can't stand what they did with Wildfire 5 Drawing Mode. I've been using it for 9 months now and I'm still getting used to having to switch "ribbons" (I'll use the MS Office name for it) to be able to do anything. When I first started using it, I literally sat there for 15 minutes trying to figure out how to get an erased dimension back onto my drawing, and another 20 minutes figuring out how to show axes in a view. Irritating as all hell.

 

And yes, NJIT. Did IDEAS really give that away? LOL. They're probably the only ones left on this planet that use IDEAS. Good luck with it, it's extremely painful. On the plus side, you have to do almost nothing with it, and if you're good with ProE, IDEAS is easy, just frustratingly buggy. I guess you're in the Senior Design 1 class if I remember correctly. I think that's the only one that makes you use IDEAS. I'm guessing Harry is still teaching it if you're still using IDEAS.

 

I learned on ribbons in Autocad 2008(or was it 09...I was still at Bergen Community) so I'm used to both ribbons and the old way.

 

I think NJIT and Ford are the only two places that still use IDEAS

 

You're right about Design 1, taking Design 2 over the summer so I am able to graduate this May. Big K is still teaching it, funny guy.

 

Rumor has it, we were suppose to switch to Solidworks from IDEAS, but I think everyone in the ME department is scared of being body slammed through a wall by Harry(I had him and Fischer back to back last semester, both are hallariously funny in their own way). He was explaining today that in the early 80s there was GE mainframe system they got, was obsolete in about 2 years and wasted around 250k. Sun came in around 86 and sold them on the system with IDEAS. I can deal with it for one semester.

Heh, I first learned on Autocad R13 back in the day, so I'm still kind of upset that I can't type all of my commands. That's probably why I make a crapload of mapkeys (aka keyboard macros/shortcuts). It took me a while to get used to not running ProE with the old menu system of 2000i2 and start using the icons on menubars.

 

Harry will never let them get rid of IDEAS, and I don't think Herli ("green check it") will ever let them get rid of ProE. Btw, if you haven't already taken it, Herli teaches some decent classes on the software packages, ME430 and 441 I think.