/cad/ CAD Thread

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How do I go about this?

trying to model this in solidworks.

>>31723103
Linking blueprint Anon's links
Will try to get a mega going later.

>https://www.adrive.com/public/m4zcJ7/Guns1.zip
>https://www.adrive.com/public/E9AXam/Guns2.zip
>https://www.adrive.com/public/TCVEHs/Guns3.zip
>https://www.adrive.com/public/McrZFX/Guns4.zip
>https://www.adrive.com/public/fu2E4h/Guns5.zip

>>31723156
as in, joining those two components into a single solid part?

>>31723103
Does anyone know how hard it would be to put a Ruger's guts into a top break frame?

I'm thinking pretty much everything could be moved over but am having trouble envisioning how the ejector would work.

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>>31724103
...do you know how to use CAD and move it over to Solidworks or a similar CNC software?
That is a pretty tall order that I think would need custom heat treated parts and a lot of machine time unless you want to spend a lot of time hogging out material.
The MP-142 is more or less what you are proposing that never made it to market because of import bans. If you were to go it alone I'd recommend the Pryse cross pin system as it seems more forgiving regarding things like headspace.
Lots of little things the Belgian knockoff artists did that are decent ideas due to the relatively lower quality machines and materials they were working with.

>>31723156
>>31723536

I'm not sure what you're asking, exactly.

Are you trying to turn it into a weldment or just fuse two bodies in a single part file?

Because if it's in a singular part file, check the "merge bodies" box in the relevant feature(s).

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Printing up one of these right now, should work out fine

>>31725305
Are you going to be adding a liner and back plate?

>>31725333
If I say yes will it keep away the atf agents?

>>31725382
It's not illegal regardless of what you do as long as you follow existing laws for home gunsmiths like caliber and length requirements.

Does it auto index? You should experiment with steel reinforcements so you can move past pepperboxes.

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>>31725382
>>31725333
>>31725436
To answer your question:
I will be buying https://www.gunpartscorp.com/ad/588180.htm and cutting it up to make a couple pepperboxes worth of barrels.

>Does it auto index?
Nope, its a really simple design.
> You should experiment with steel reinforcements so you can move past pepperboxes.
I am using a really cheap shitty printer to see exactly how cheap/easily you can print a gun.

>>31725305
>>31725333
>>31725382
>>31725436
>>31725472

Regardless of whether you think it requires it for pressure (it kinda does), you need a certain amount of metal in it if you're in the US for legal purposes.

>>31725514
>Regardless of whether you think it requires it for pressure (it kinda does), you need a certain amount of metal in it if you're in the US for legal purposes.
Bingo, plus the whole zipgun thing. Which is why epoxy will be used to attach pieces of metal and the barrel liners to make it legal weight.

>>31725514
Really? Stupid but I guess congressmen have good taste in movies if they think a plastic pepperbox is any threat.

>>31725538
.22 short or LR? Would love a printer to just get the trigger and internals of guns mocked up. I haven't been keeping up with printing tech, have an example of how precise you can print?

Oh, btw, this might be of interest to you as a method to strengthen printed components:

https://www.youtube.com/watch?v=d-heV79vRWY

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>>31725589
>good taste in movies
Pic related
>.22 short or LR?
Going to try with short on this one, thinking about a 10/22 receiver next

>Would love a printer to just get the trigger and internals of guns mocked up. I haven't been keeping up with printing tech, have an example of how precise you can print?
I am using this printer
http://hackaday.com/2016/06/13/review-monoprice-mp-select-mini-3d-printer/

>>31725672

What's the piano hinge for?

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>>31725733

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sup dudes, heres a little project ive been dinking around with. It's a .22 side-break action integrally suppressed, 3d printed and uses modified internals from a nerf gun.

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5 internet points to the first person to figure out what this is, and why I designed it.

>>31725672
Did you fucking design a gun in sketchup? Why....

>>31726048
plz be designing a HMG

>>31726065
Not my design

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Heres a more relevant to /k/ one. Good luck.

I can share the CAD files if you want.

>>31725928

Disgusting.

>>31726219
It's just a bog standard rifling jig, why would anyone need instructions for that?

>>31726331
How exactly are you going to frabricate one with out detailed plans? Whats the pitch of the helix you need to bend the guide rod to? How far will the helix rotate from one side of the 1.5" box tube to the other? How much steel can you cut in one pass without damaging your cutter? Did you check the stress/strain curves of both your carbide cutter and the steel barrel?

Let me guess, you just go into your shop with an angle grinder and guesstimate everything. This id a CAD thread, fuck yourself.

>>31726421

You said exactly what I was thinking. Thank you.

Measure nonce, cut thrice, right? That's how the saying goes.

>>31726421
As if you can garuntee everyone has access to the same barrel material, if they don't then your curves are useless and even with all that how are you going to make the rod an even bend unless you CNC the whole thing in which case the person who has access to that machine may as well make a multi path cutter and not your pointless waste of time.

The only thing your jig would be good for is making good enough rifling, in which case someone may as well just go out to thier garage with a twist rate in mind and go from there.

Put on a trip so your warrantless sense of self importance can at least be more easily ignored.

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>>31726543
>multi path cutter

>>31726599
>let me post an ebbin reddit stickfigure graph without any argument because I have none

Nice.

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>>31725269
>>31723536
I figured it out, it was pretty damn easy once you plan the cuts.

>>31723531
yes

>>31726040
Nice m8

>>31726660
>SMBC
>reddit-tier

Maybe if he had posted something from XKCD you would have had a point.

>>31726660

Your depth of knowledge on the subject, based on the verbiage of your post, is so shallow that it's actually pretty humiliating.

Define a "multi path cutter", for me. Because if what you're trying to say is what I think it is, that's not the name, nor would it be useful for cutting helical grooves inside of such a long and narrow bore as the inside of a barrel.

>>31726543
I already said I designed it for my own use. I said do you not design your projects? Let me guess, you overengineer everything? You probably dont even know what a factor of safety is (relax, yours is probably over 9000, you basic, incapable hobbiest).

>>31726599
Why would someone's willingness grow exponentially when their knowledge is still only growing linearly?

>>31726821

That's not exponential growth, Anon.

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anyone have uzi headspace dimensions?

>>31726821
Exponential growth is for lazy bums, my skill grows at a factorial level.

>>31726817
>calls me a hobbist
>defends poor design saying he is a hobbist

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>>31726837
Sure looks like it.

>>31726961
Ok so engineering isnt your strong suit.. Neither is reading comprehension... What exactly do you do? Flip patties?

>>31727016
Just ignore the troll and post the CAD file, m8.

So how do you snap the cutter on and what do you use?

>>31727121
The cutting head a carbide drillbit welded to a narrow block of steel at the end of the shank. About 2/3rds away from the shank, the steel block has a hole drilled, with threads tapped. Inside that hole, there is a set screw that you adjust. It increases/decreases the deflection in the drill bit and in turn allows you to increase depth of the rifling cuts down to several thousandths.

>>31727016
>still doesn't defend his design and refers back to ad hominem attacks
It's okay of you can't think critically and will get replaced with an Indian who can't think critically and will do it for pennies.

>>31727259
Never had much success welding drill rod, I'm guessing TIG?

How long does it take to rifle a barrel and what do you use to make the actual helical guide? Have you tested the twist and depth consistancy?

>>31727304
I actually managed to weld it using my stick welder. Pretty much just standard eigth inch 6011 rod.

As for cutting, it takes a while to do it right. To get a good depth it takes about 7 or so passes- per groove. I measure the increase in deflection using feeler gauges which slows down the process a bit.

>>31723103
>not using GD&T

>>31727359
>actually measuring deflection in home rifled barrels
You machinists are an odd bunch. You mentioned using stress and strain curves, is that more of an eyeballing thing to check and back off when necessary or an actual chart? Also is there any reason you don't use a cutter head with two or so faces to speed things up?

How display you make the actual rifling rod, just twist annealed rod over a tempered anvil and weld it in? Imagine that would be the most maddening part of the project.

>>31727445
YES. The cutter is childs play compared to the twisted rod. But we'll get to that later. The cutter could have multi faces if I changed its design. I could use carbide blades from mcmaster or something, but the drill bit option is easier and I know people who also used it with great success. Unless you are working on something really big bore, the drillbit is simply too large to cut multiple paths at once.

Now back to the rod. You know how in cad, curves are just truncated many times to appear round? Same thing for the rod. (Also why it would be near impossible without using CAD to design it). On my rod for example, I broke the curve into many small segments, iirc the plans call for .25". They each are bent a very small amount. Of course this still is really rough, so to finish I first coiled it around the center guide rod, and spot welded it in several spots along the length. Finally, with it tacked in place, I went along the curve hammering out the kinks, and test fitting it to the box tube until it slid.

Ps, I'm not a machinist. I'm a total hack at machining. I'm a lowly engineering grad student.

>>31727445
Cont.

As for the stress strain curves, I only toiled with them when I was designing the jig. I had the E values for both my cutter steel and barrel steel. I made sure not to hit the proportional limit for either metal to endure I dont damage my jig or barrels.

>>31727508
>>31727610

https://www.youtube.com/watch?v=HCF2tQhceTM

Imagine how much less time it'd take with a wire bending machine.

>>31727668

Hell, even this hobbyist one can do spirals.

https://www.youtube.com/watch?v=ve1zzDXlJoA

>>31727668
Yeah, but if I had one of those I'd probably have a lathe too- so I wouldnt need to build this jig at all.

>>31727689

Eh. I'd rather a 4 axis mill than a lathe. I find thread cycles kinda tedious.

>>31727758
Right and I'd rather use a precision machined mandril, and hammer forge the barrel blank into the mandrill. For fucks sake guy, we are talking about DIY here.

>>31727508
get a toolpost tool holder to hold wire, set feed to 1 divided by twist rate, wrap wire around rod, weld it in place.

should get you in the ballpark of where you want your twist rate to be

now engage power feed and twist that wire around the rod.

of course, if the wire is thick it might get tricky (or dangerous).

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>>31727833

>>31727833
To clarify, the twisted guide is 1/16" steel rod.

>>31727895
3/16", typo.

>>31727902
donnow how well something on the toolpost will hold that to bend it

>>31727909
Yeah short of some real industrial tooling I couldnt think of another way to bend it.

>>31727921
of course, with the right feed rate on the lathe you could machine a screw with the right TPI for your twist rate and use that too

if your machine doesn't have the right thread pitch ( a very fast one ) you might need to make (or buy) some near gears and change htem out to do it.

>>31727945
Once again though, if I had a lathe I could just turn the rifling.

>>31727869
looks like the 2 1/4 setting is .116, and 1 divided by 9 is .111

for a 1:7 (.143) twist barrel, the 1 and 3/4 TPI setting is .144

pretty close approximation there, you could have someone machine you a screw to use.

>>31727959
(or find a 1 and 3/4 TPI threaded rod)

>>31727959
You're talking pistol length/caliber barrels right?

And do you have any pictures of your machines?

And final request (morento humor me). Timestamp on a piece quadrille paper :)

>>31726048
looks like a model rocket stand.

>>31729976
Good morning. And close! Its a test stand for motors. It was used to characterize a proprietary propellent mix, (using modified casings with pressure transducers, in addition to load cells on the stand itself). It has been used on everything from a J motor up to a 98mm M motor.

>>31730475
I thought so because it has the stabalizers at the bottom of the stand, to keep it level for a launch. and the holder for the motor itself.

>>31730497
Yes all the legs are allthread, and are mounted using nuts that are welded to the struts. They can all be adjusted independently to level the platform.

>>31729917
nice, done yourself or downloaded?

So I'm writing a program to try and make some aluminum base pads for a Glock magazine.

Do you guys think it would be better to have the bottom flat or angled, and how thick should the entire thing, ideally would like it to be able to fit in "the box" in either IPSC or idpa.

>>31730475

What propellants are you using?

>>31731189
APCP. The mix is is pretty much between a blue and sparky propellant using r45 for our binder.

>>31726879
Its a closed/open bolt design. The spring pushing the bolt will always be in contact with the bullet, no headspacing needed. Just correct chamber dimensions is required, but I think you got that last thread. Any system that uses locking mechanisims require headspaceing because the interface between the locking parts might not match the interface between bolt face and cartridge

>>31730713
downloaded...
I made a sten though...but the laptop that had it is broken...

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>>31731362

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.22lr single shot pen gun based on a design from a patent submitted in1926

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>>31733034

I'd get rid of that gap, but that's just me.

>>31733510

I remember that thread. I thought you were going with two firing pins on opposite sides of the rim...

>>31733034
I'm sorry, I meant to say straight blow-back design. Any firearm is either an open bolt or closed bolt system. But what you show is correct, and you may do as >>31733925 says.

>>31723531
wtf is the password you ultranigger?

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Anyone have a glock select fire back plate set up for CNC? I have access to a machine at work that I fuck with but no plans

>>31723103
>autocad
What the fuck is wrong with you

>>31734195
cosmoline

>>31726040
Cool stuff my dude; don't blow your hands up

>>31734612
>Anyone have a glock select fire back plate set up for CNC?

I've got one... It's called "LEARN TO CODE."

Or, y'know, just let the CAM program spit out your code for you and never learn anything meaningful.

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>>31735543
I'm learning like everyone else but as it sits I can get by with my base knowledge, my job isn't to code. It's to operate the the equipment with the specs provided.

>>31734612

Dude, you can't just take someone else's Gcode and run it on a different machine. You'll crash the fucking thing.

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>>31737045
Hey someone shared my file yayyyyyyyy

>>31736893
It's a down machine friend, we all use it for side projects. I appreciate your concern

>>31737094
please tell me then, how do you append data to the bottom of an image like that without the board detecting it? Doing it the normal way (copying one file to the end of another) is automatically detected by the board. But how do you do the 24 bit bitmap thing?

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>>31737094
>>31737045
use a feeler gauge set ($2 in the automotive dept.) for the paddles, they are a measured thickness.

The thickest blade might make the body of the device well enough. Alternatively a hacksaw blade can easily be used.

Now, I have something even cooler!

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>>31735543
I think there are 3d models of those, probably in one of the defense distributed packs.

You could model it yourself if you wanted it bad enough.

Here's the info.

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>>31737400
SKS version here

>>31737118

You miss the point.

If even a single setting on the controller is different, that can cause a crash.

For instance, G0 can be set to either go diagonal at full speed until one axis has reached the correct ordinate and then to move linearly for the remained of the other axis until the final coordinate is reached OR to move in a straight line towards the coordinate.

If the GCode isn't written with the exact knowledge of how the machine is going to behave, it is extremely easy to cause severe damage to the part, the cutter or the machine itself.

If YOU'RE LUCKY, it'll just give you an error code. For instance, some newer controllers will automatically set the cutter radius compensation for tools. If the code was written for a machine that doesn't have that feature and therefore tries to define the cutter radius compensation in the code, then the machine will return an error code.

People bash the Ghost Gunner a lot, but the main idea behind it is that every single unit has the exact same setup, allowing you to run someone else's GCode.

If you want to run your own projects on the machine, then fucking learn to code it yourself.

And believe me, using MasterCAM or some shit as a crutch will only get you in trouble if you don't learn how to do that shit manually first.

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>>31737447
this one is the ghetto hobo version of the Tromix device

>>31737490
I can't even imagine taking some unknown code off the internet, plugging it into a machine, and hitting start. Even on a fuck off machine. To be fair, chances are the controller will choke on something and refuse to run, but the risks, man, the risks.

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>>31737571

>>31737592

Exactly.

This is why CNC Operators earn half as much as programmers.

>>31737592
you can use CAM to generate some G-code from a 3d model though, right?

how much different is that? I think you guys are getting too hung-up on the idea of using "straight G-code" from one machine to another, when 3d models are what they transfer around these days.

>>31737602

Oh hey, someone saved it! :D

>>31737610
3d models are what people usually use, at least thats how it's done where I work. But the guy was specifically asking for "plans," not "models." Which leads me to believe he wants an actual program he can load onto the machine and hit start. Maybe he's referring to the model, in which case awesome. Have at. The other option.. well.. have fun cleaning up the mess..?

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>>31737619

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>>31737740
Operator brand...

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>>31737763
better print of the SKS device

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>>31737790

>>31737610

Dude, CAM software just exports GCode based on the parameters that you tell the CAM software your CNC runs with. It's still just GCode and everything has to line up or it's dangerous as fuck.

Either you export the straight up .NC file or you have the computer hooked up directly to the machine and "trickle" the GCode in a chunk at a time... Which actually causes problems if you have subroutines, as the subroutines will be at the very end of the GCode, so the machine will be like "Where's the subroutine?!", because it hasn't loaded it yet.

Point is, even if you have the 3D model, unless your CAM software is set up properly and you know exactly how the machine is going to behave, creating a proper (and more importantly SAFE) program is not going to happen short of sheer fucking luck.

>>31737839
So your CAM software isn't set up for creating G-code safe to use on your specific CNC machine?

>>31737853

You have a different machine "profile" for each CNC machine within the CAM software. Taking a program someone else made with a different machine profile and running it on a different machine can lead to just as catastrophic a result as if you took manually written code and did the same thing.

CAM is there to speed up programming and to make programs that are otherwise basically impossible. It's not there to replace skill or knowledge in programming. If you just jump in without knowing what each parameter actually does because you never learned how to program, then you'll have the wrong box checked or punch in the wrong value somewhere else and shit will get too fucking real for you.

>>31737914
>Taking a program someone else made with a different machine profile and running it on a different machine can lead to just as catastrophic a result as if you took manually written code and did the same thing.

Which is why we are discussing 3d models -> CAM -> specific machine the cam is configured for, NOT the program.

>>31737138
http://userscripts-mirror.org/scripts/show/141749

>>31726543
Spoken like an ignorant nigger. Don't talk about something you know nothing about.

>>31723531
The password is "cosmoline"

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Hi peoples. I figured I'd post my current project. But first, my reference material. Thanks a bunch FOIA and whoever was bored enough to file for these.

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>>31739446
The sidewinder has a diameter of 5". I am building a scale model at 3" out of fiberglass. It will be powered on H motors to start with plans to bump it up to an J eventually.

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>>31739464
Here's number 3- this is a side view of the tail fins. Notice the pinwheel of death thing? It's called a rolleron, it prevents the missile from rotating around the Z axis. I had trouble getting all the dimensions I needed from these schematics, but I managed to find a real rolleron from an AIM-9 Sidewinder on ebay, of all places. I am going to attempt to 3D print a set, just to see if it has any effect (at this scale, I highly doubt it will).

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>>31739494
This is a view of how the tailfins mount. I will copy the profile, however mine will be attached through my fiberglass body tube, to the motor mount using epoxy like any other rocket.

>liked parametric modelling as a kid
>hate edgy "liberator" designs today
how do I make money off of edgy americans while not being driven to murderous rage by morons?

>>31726968
>missing the entire Mount Stupid part

Why are americans so bad at math?

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>>31739512
Here's a profile view of the fore wings, and their cross sections at several spots. On a Sidewinder, these are attached to stepper motors at the center of the hemisphere at the base; which are controlled by the flight computer to steer the missile. Of course, I'm not looking to aim a fucking rocket anywhere but up- so I am going to stylize them to match, and once again epoxy them in place.

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>>31739542
>adopting trip for rest of bread
This is a different version of the sidewinder- not exactly what I'm modeling my rocket after... but the view was helpful as a general reference.

>/k/ legitimately believes it can 3d print an entire Sidewinder missile
>trusting tripfags to boot

l-lol?

>>31739579
I mean, there's not much stopping a hobbyist with an interest in rocketry, electronics, chemistry and machining from making missiles, if I recall correctly there was a kiwi that was vanned for providing plans for a missile.

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>>31739566
Here is a detailed break down of the nose. The very tip looks like a smoked glass, but if you look closely at an actual sidewinder you can see various bits and pieces in side. On mine, the very tip is actually going to be cast with an transparentish-amber polyester resin

>>31739608
True. There's not.

Which is probably why the state of the craft has progressed beyond regurgitating designs and into making them yourself, and why laws relating to the craft aren't "don't make sidewinders" but more like "don't operate near airports" and "please respect laws concerning flammable material storage and usage"

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>>31739579
uhh, you realize experimental rocketry is a thing? I am building this for my level 2 cert (as in, I already built and flew a successful rocket). This is my first scale build; and granted its tricky. The hardest part is the CoM is completely fucked because the sidewinder was designed with a heavy payload toward the front. I will have to add weights to balance it out.

>PS, you realize all but certain structures will be fiberglass cloth + epoxy, right?

>>31739645
>uhh, you realize experimental rocketry is a thing?
>experimental
>HAY GUYZE LOOK AT THESE 900 YEAR OLD SKETCHES I FOUND OJLINE
>experimental

fuck off m8

>>31739657
>hes too stupid to actually use google.
look and laugh


so should I dump my CAD files? I still have to reverse engineer the rolleron, and the sled for my avionics bay; but besides that entire structure is finished.

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>>31739677
forgot to include pic

>>31739677
>should I drop CAD files in a CAD thread
The fact you didn't is retarded.

That being said, I'm surprised this hasn't become more of a problem. A couple thousand dollars and you can have recreate the blitz over any major US city and shut down finance for months and cause the stock markets to tumble for years.

Is there something I'm missing besides terrorists being thankfully retarded?

>>31739677
>ripping off shit
>experimental

Are you ESL?

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>>31739689
The nose cone's anatomy, besides the forewings- is essentially identical to the design I used for my level 1 certification.

>>31739713
Yes. Generally speaking, to buy motors, you need a certification from either NAR (faggots) or Tripoli. If you want to make your own motors, you need to buy APCP, which you wont find cheap because AMPAC won't sell to you unless you are responsible.

If you want the igniters, you also need to know people in rocketry, they are kind of in a gray area of legality.

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>>31739714
>so stupid he doesn't actually bother to look up what 'experimental rocketry' is. Is this the first time your mommy let you use the computer unsupervised? LMGTFY

>>31739749
>amateur = experimental because both appear in a dictionary entry from a source not even regarded as a real canon dictionary

Again, Are you ESL?

>>31739749

Hello rocketman, former level 3 holder here. Why are you designing it in solidworks from scratch instead of programs like Rasaero or Rocksim? Those programs have all the physical components of the widely available rocket parts programmed into them, including cp/cg and mass. Seems like you're trying to reinvent the wheel here?

>>31739737

Its >>31739806 again, just an FYI the BATF reclassified AP and shit to no longer be a tracked hazcom purchase. Thus you no longer need a level 3 for the big purchases. That being said some of the old vendors don't like to sell to people with no certs but that's just people thinking they're important when they're not.

>>31739737
True, though what is stopping people from making their own motors?

Suppose if you are a terrorist it comes down to
Like a curve of
>smart
>crazy
>has opportunities beyond getting raped in Gitmo indefinitely
so only burnout losers go full durka

>>31739806
I've used rocksim. It's not exactly reliable.The only thing useful in it, is its flight simulation, but its wildly inaccurate compared to manual calculations.

The main reason I am designing thoroughly in solidworks instead of hacking away at it in the shop- is that I will be using several processes that require it.

The fins on the nose cone will have a 3D printed skeleton and then skinned with fiberglass to give them dimension. It's not like I am just cutting them out of eighth inch plywood. The same goes for my rolleron assemblies, (if I end up going for it). I also have access to a vaccuformer, so to make that casting for the nose I mentioned earlier, I am going to 3D print the tip, then make a mold using the vaccuformer, and finally cast it in said mold. Lastly, my centering rings and several other small components will be cut out on a laser cutter.

If I did it all by hand, I would still have to make cad drawings of most of the components.

>>31739843
You have to get AP, which once again, is really hard to buy.
>>31739842
I know that was a few years ago. It's still a PITA though, only AMPAC and one other company still manufacture it in the US. You can buy from resellers online but AMPAC sells small quantities if you ask nicely.

>>31739850
>>31739861

Well I wish you luck....

Your comment about rocksim gives me pause, when you take the time to input proper data the simulations are within 10% of actual altitude from barometric and gps readings (at least back when the team was using it).

Back when the team was together we tried making our own nosecones almost identically to your method and some others, and it was always more reliable to go with a COTS unit than try dicking around making one.

As for purchasing AP, are you already mixing your own motors? Have you read ECP? Do/did you have someone watching over you for the first few times? Mixing solid propellant can kill you if you don't know what you're doing (combustion from aluminum & mixing and cancer from the modifiers).

>>31739941
I have mixed propellant and made several grains for 98mm M motors for a group I'm in. It is also where I got to help design, and machine motor casings and nozzles; and learned how to make body tubes and cones out of fiberglass.

You can relax though, for this rocket in particular I am using off the shelf sparky grains.

>>31739971

Enjoy beating your head against the wall.

>>31739941
>Back when the team was together we tried making our own nosecones almost identically to your method and some others, and it was always more reliable to go with a COTS unit than try dicking around making one.

As for making cones, it's really not that hard. We glue several layers of the blue foam insulation board from lowes/home depot; and then follow a template on a lathe. Once we have the foam base, It's really not that hard to lay on the fiberglass sheets. Well, at least for a normal cone. The cone on the sidewinder has 3 different radii transitions... In any case I think I'll be fine, worst case scenario I am going to have enough extra fiberglass and epoxy to make a second cone if need be. I'm only using 6oz so its not like cost is a factor, just time.

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Worked on some more parts haven't moved the chamber back yet. How deep should I make my breechface?

>>31737400
>hacksaw blade

shit snaps to easy

>>31737619
yeah only half of it :D

>>31723531
3 and 4 wont download

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>>31740769

The breech face depth looks fine. Make sure that you have the front of the casing indexing in the chamber.

>>31740994

I only remade that specific drawing because the original used chain dimensioning and it was driving me nuts.

>>31740958
temper it at a lower temperature

bump, I need help designing a single shot 22 to 3d print

>>31745660

Do you plan on using a metal insert?

Is there a specific action you want to use? Bolt? Falling block? Break?

How do go about making actual metal parts out of CAD shit I've made?

>>31745816
I have a barrel from a mossberg plinkster that Im gonna use. I mainly need to design a receiver. Idc about what action so long as its easy to build.

>>31745895
Join a makerspace that has a mill and lathe; and get good at reading schematics. You may want to start out designing around wood, or another easy to work material so that you can get some experience converting CAD to real world. You will quickly realize that you need to learn about stacking tolerances and other fun things, and it can be really frustrating at first. Metal is expensive and hard to work with.

>>31745895

Create drawings from the models.

You use orthogonal views, supplemented with section and auxiliary views, all fully dimensioned so that a machinist can produce it. That's the part of 3D modeling that most hobbyists never get into.

If you're 3D printing it, you don't really need the drawings, but making the drawings is actually where you end up finding a lot of the errors made in the model.

>>31731709
can you send this to me?

>>31745895
Design for manufacturability. If you know enough about processes (lathing, milling, drilling, bending plates, etc) then you'll realize that what you design has to be constrained in ways that make it possible to easily manufacture.

tl;dr start with blocks and plates and mill/drill stuff out of them

>>31746593

That's definitely a big issue in the industry. Designers give the Engineers shit that makes no sense, the Engineers give Drafters shit that are completely non-standard (and therefore not cost-effective) and then Drafters give Machinists shit that can't be machined.

It turns into a giant mud-slinging match and everyone hates everyone else. The only solutions to this are cross-training or very strong cooperation between everyone involved from the get-go (which can be difficult in larger companies).

>>31748068
Shouldn't the machinists and drafters be in sync? I get some designer not knowing much about the actual manufacturing but those guys should have more or less the same knowlege.

>>31748202

Closer than Engineers, but there are still a lot of aspects that you'll only learn on the job. You'll see drafters put pockets in a part with 90 degree corners that aren't possible (since the cutter has a radius).

Engineers learn the physics behind shit. Drafters learn how to model/draw it and Machinists learn how to machine it. If you ask a machinist to make a drawing, odds are, he'll use chain dimensioning, but a Drafter would get fired for using that.

Unless you actually learn multiple different fields within engineering/manufacturing, you WILL end up making the kinds of mistakes that are typical of the specific branch that you do and people in the other sections will either laugh at your ignorance/get pissed/both.

The thing is, Engineers often think they can do no wrong and when you've fucked up, the LAST thing the people who are tasked with fixing your fuckups want to hear is you telling them that they're idiots who don't know better because they're not Engineers.

>>31748314

Not to say that Machinists and Drafters don't have their failings, but they're usually less snooty about it.

Machinists have a tendency to not fucking read the drawings (or straight-up disregard it because it's more work to do it the way the drawings show) and then complain when things don't fit together right (or at all). If a Drafter puts a view of something on the drawing, there's a reason for it.

>>31748314
>>31748356
Huh, you'd think there would be less miscommunication with email and cellphones. So is CNC p free try much making all this irrelevant or is tradional machining and drafting still the fastest way to get things done in mass production?

>>31748528

Manual machining is mostly dead already.

Even if you CNC, however, you still need a Drafter. Except instead of a normal Machinist, you'll have a CNC Programmer and a CNC Operator. Programmers take the 3D model and drawing(s) made by the Drafter to write a program. If you do both, you're known as a "CAD/CAM Technician". Programmers and CAD/CAM Technicians can earn as much as an Engineer once they have a bit of experience under their belts.

>>31746229

I mean, he DID say that the laptop it's on is broken.

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bump

>>31750611
what is that

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>>31723103

Any machinists on here that would be able to give me their opinion on these paint diagrams I made? I'm not a machinist and don't know my way around any equipment. I was hoping to print these out and take them to someone who would know how to cut them. How long would they take to fabricate for an experienced machinist?

>>31750748
Some kind of thin metal shim for something, I'd suppose.

I have no idea how you'd even start manufacturing that specific piece at home to the given dimensions, unless bending a wire to that shape and leaving an open end would be acceptable.

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>>31750817

This would be the last cone in the stack.

>>31734612
hello ATF

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>>31750817

This would be the spacer material. I got no dimensions for the cutouts, I would probably just ask the machinist to cut two wide windows out of the sides to increase the volume for the blast chamber a little bit.

>>31750817
>>31750836
>>31750854
The outer steps could probably be pulled off on a lathe.

The bracket shaped handle cutout you have would have to milled, and there'd have to be a jig for it, which would be annoying to deal with.

The 60 degree cutout on the inside is going to be irritating and honestly the machinist would probably just run a countersink bit through the center and hope it's close enough to 60 degrees.

>>31750817
>>31750836
>>31750854
>>31750890
Addendum: If you're trying to make a fucking suppressor, which you clearly are, just use steel washers. You don't need to mill all this shit, goddamn.

>>31750817
>>31750836
>>31750854

Each conical piece would need to be turned on a mill twice. The cuts themselves wouldn't take too long on a CNC lathe. The slot at the bottom of the cones could be done quickly with a mill. Just use a bull-nose mill to cut the radius.

For the spacer, might I suggest putting the diameter symbol (or at least "OD") next to the 1.345"? You'll also need an auxiliary view for the slot dimensions and a section view showing the angle between the slots. That would be done quickest with a 4 axis mill (Or at least a 3 axis mill with indexer).

>>31750928
turned on a lathe*

Blarg. Me need sleep.

>>31750928
>>31750904
>>31750890

Thanks for the advice. I figure I'll just get some freeze plugs or washers or whatever.

>>31750928

Additional question, my man. You sound schooled in NFA manufacturer knowledge. If I take my Form 1 suppressor in to be repaired somewhere, could I just pay to have a new core put in, like some monocore or whatever? Or does the ATF expect us to just build a new suppressor?

>>31751083

I'm Canadian, actually...

Though I believe the only component that matters as far as that is concerned is the serialized part.

Hi faggots, just popping in to say if you have a .edu email right now, you can get CATIA V5 2016 for free. The coupon code is CATIA4FREE16.

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>>31751880
muh nigga

>>31751902
>.edu email
.tpb

>>31752110
Enjoy not having cloud storage and file version management.

>>31750819
>>31750748
It's the specs for an hk91 receiver

>>31751880

How's the CAM integration in CATIA?

>>31746229
>>31750539
It's me again.

Maybe he was referring to the G34.
I got it from grabcad.

>>31755759

Ah, good point.

>>31752201
Probably not a huge issue for someone learning to use the software though.

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>>31726543
>As if you can garuntee everyone has access to the same barrel material

As a mechanical engineer I must say that if a design document specifies a material, you use THAT material (unless you know some kind of exact equivalent for it).

A big part of engineering is saying "we know it works with these materials and specifications" but that also means "it may work with other stuff, we just have not tested it".

TLDR: use the right materials of equivalents, do not be a nigger and use "some metal I found in the backyard".

>>31756346
Well they can use whatever material they want. If something fails and you die, get injured or anything whoever stamped it isn't liable.

>>31756403

That's also right.

I've seen chinese clients use different materials and thicknesses and all I can do is say "we recommend X" in a written form which moves the responsibility from the company I work for to them.

There's literally nothing I can do about it, oh well.

>>31756440

Ugh. Fucking China, man...

>Working on a contract for an American company
>American company wants all their units everywhere in the world to use the same size peg for a specific assembly
>We contract out manufacturing to a Chinese partner because of the number of units to be built
>Give them extra money and an extra two months lead time so they could acquire the imperial sized rod that they need for it
>They just use the next metric size up
>Nothing fits, people screaming at each other in Japan, Germany, China, Canada, the US and a bunch of other countries

The angriest I've ever been on a conference call. Chewed them the fuck out. It wasn't even a change in material, it was a complete change in THE MOST CRITICAL DIMENSION.

>>31756484
If its an international product used globally why not use a global standard?