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>>1031404
>>1075039
perfect loop
W O O D
O
O
D
More rocket landing, fuck yeah.
you guys have anything about rails?
>>1075047
what's this? test for a reusable rocket?
Also quite sure it was going to go sideways
>>1075046
bite the pillow
>>1077333
Test for reusable launcher from SpaceX.
>>1078081
You know what doesn't feel good? The nonlinear force transmission. Also I don't think anyone would ever like to use that joint at that steep an angle.
>>1075846
Muh dick
>>1077249
imagine the size of a full fledged computer
What do you guys think of Hyperloop ?
https://www.youtube.com/watch?v=ewTTPRq-M7s
>>1075049
I'm not an expert obviously, but wouldn't it be more economical to just cast it?
>>1079826
No expert either, bust casts have much lower precision, one would have to refine the cast afterwards, pure steel rods are much more uniform in their structure than cast forms, so I guess this achieves better results
>>1078484
reminds me at the CEBIT they presented a "2 Terabyte HD" some time in the late 90s or early 2000s before the electron spin was discovered. it was a conglomerate of hundreds of smaller HDs put together and they used an automated seeker arm to move between them and access data. totally impractical, horrendous access times and obviously only for representative reasons, still very memorable.
I just can't find anything about it on the net, wish I'd have that video.
>>1079830
I see, makes sense.
>>1079826
>>1079830
Casts are made using material that has a much lower melting point and are generally weaker. This is a solid piece of high quality steel. Most cast metals use iron or weaker metals. Cast Iron also creates parts that can often have weak spots (it can't be force fed into the mold the way you would with injection molding) which is undesirable if the part will experience a high amount of stress.
>>1079846
>>1079830
You must be dumb. Ever heard of combining work methods? You cast the thing first into a rough shape with lots of overhangs, then you use a specialized CNC to cut parts out of it. Practically all heavy duty parts in modern cars are made like this. The only disadvantage is that you need to set up a huge production line for it. This is expensive to set up. But it is still cheaper in the long run than cutting a complicated part like that one out of a huge block of steel eight hundred thousand times. I've seen it done personally on turbocharger casings and engine blocks.
The only reason you'd make something like this out of whole CNC'd blocks is if you were doing a low production run and it wasn't worth setting up a huge production line to get them done properly and cheaply (per unit that is).
>>1079858
>you must be dumb because you haven't acquired specialized knowledge of a kind that is completely outside your usual field of work
>look how great and brilliant I am for having this special wisdom because I obviously have already worked with that in some kind or another
>>1079898
Yep, pretty much. If you don't into industry then you're a barnacle on society. If you don't into industry and mouth off like you know something you somehow manage to be even worse.
>>1079858
>>1079925
see
>>1079846
It's the difference in materials.
> But it is still cheaper in the long run than cutting a complicated part like that one out of a huge block of steel eight hundred thousand times
It's probably a specialty part. Nothing anywhere suggests it's a production job.
>The only reason you'd make something like this out of whole CNC'd blocks is if you were doing a low production run and it wasn't worth setting up a huge production line to get them done properly and cheaply (per unit that is).
See above, it's a specialty part and the hunk of material pales in comparison to what the customer is probably paying for it, which is something huge.
Don't be so quick to call others out when you come across as new as fuck yourself.
>>1079930
>Materials
Unless you're fucking retarded, you can heat-harden anything, and it's a very common procedure to do on cast parts which is usually much better than afterthought surface hardening jobs anyway. Case in point, look up red hot glowing turbochargers. That's a cast part. Real weak, huh?
>>1079942
>Unless you're fucking retarded, you can heat-harden anything
Adding an unnecessary subcontract job or otherwise labor in another department for a prototype/custom/specialty part isn't very cost effective when you can machine the whole thing in one go.
Not only that, we don't know the kinds of tolerances and features the part demanded, thereby making a casting out of the question.
All in all, one-off specialty/prototype pieces with strict tolerances and features should never be cast.
Hardness isn't the only feature in the whole industry. What if they needed a really good surface finish on the whole thing? Concentricity?
Roundness? Run out? None of which you will find in a cast part to any sort of accurate degree.
>>1079949
>All in all, one-off specialty/prototype pieces with strict tolerances and features should never be cast.
Hilarious, that was literally my job you cretin. We had a 3D printer that printed sand. We used this to print prototype casting moulds that we then filled with liquid high quality steel to make prototype casts. Then we handed them to the CNC guys who did the surface finishing and the drilling of mounting holes and such because the part was already 90% done out of the mould.
Just quit before you embarrass yourself any further with your half-knowledge.
>>1079956
Sounds like I work in a work environment that demands moreso quality in the final product that yours does for what our products do in their function.
Oh well though, weekend tradesmen are usually hostile and insecure.
>muh way is the only weh1!!!
>>1079964
Mercedes-Benz factory Untertürkheim, Section Mettingen, just the place where the company was founded m8. The turbos were for S-Class cars. I couldn't dream up a character for a movie that was dumber than you're acting right now.
Half knowledge is the most worthless knowledge. Know this, smalltimer.
>>1079956
>past tense
like in you got laid off?
>>1079977
Like in the sense I worked there as an intern for half a year before going back to engineering uni.
>thread ruined by an agressive German
wew
>>1075039
are these machines slowed down for demonstration, or does it really take so long?
>>1079858
>>1079949
>>1079956
Strength of forging > CNC machining > casting IN GENERAL. However, when pressure is exposed to something like a block, piston, or in this case a turbo charger, the more important things are the area exposed to the pressure and materials used is more important than the way it was sintered. Engineers therefore optimize for things like that - it simply isn't economic to machine a bunch of steel, and have that turn back into refuse.
The microstructure can typically withstand isobaric force as the distance between the grains will expand proportional to the 3/2 root of the volume, thus, a defined grain doesn't help that much when the stress in general expands in all directions and there exists almost no shear forces. If the grain structure is defined for such a thing, it might actually be detrimental to its performance because the stresses induced are guaranteed to run a uniform direction. On top of that, certain materials respond poorly to cold machining, including 319 aluminum alloy, and the edges that have been lopped off tend to become stress risers.
Regardless, in the webm, the part is likely not production grade part but rather a prototype which may end up being machined or casted after they refine the CAD.
>>1080174
>>1079956
>>1079949
>>1079930
>>1079858
You know, I used to spend my time carefully answering peoples questions/misconceptions about materials (especially metallurgical ones) but I'd always have some hot headed idiot say wrong stuff and convince everybody else I was a first semester college student despite this being my livelyhood and career.
Seeing this exchanges has reminded me why I stopped. People on 4chan are retarded assholes, wrong or right, no exceptions.
>>1075049
what did it even create?
>>1079826
Source anyone ? I want to do the same thing with my kaplas.
>>1075049
I came
>>1079826
Alongside other's answers, I feel like there'd be a possibility of bubbling.
>>1079826
pretty sure that part is just something to showcase the machines capabilities, not an actual commercial product
bump
>>1082468
i mean, I get the concept he is describing, I just don't get why does he have to say it like a fucking retard
>>1079834
>late 90s or early 2000s before the electron spin was discovered
kek
>>1087204
Because it's a joke
https://www.youtube.com/watch?v=TD1LHejil6M
>>1087292
I came
>>1079925
>doctors, network security guys, teachers, economists, coders, etc are barnacles on society because they don't do what I do.
Lol ok
>>1087204
>I get the concept he is describing
no you don't
>>1079858
>t.first year engineering student who just started materials and manufacture 101
>>1087161
What's the point in the green crescent shape? Surely it doesn't do anything?
>>1088902
Can't you see that it'd collide if it wasn't shaped like that?
>>1087161
i see the green thing works as a stop.
>>1082468
>tfw PID loops
>>1079826
A rough casting of the shape certainly, but this is promotional shit so they always go with bulk casts so people can view the entire process.
Sometimes you also have to deal with bulk casts when there's only few parts needed.
Few times ive had to rough off 2 tons of steel to make something just because it was cheaper.
>>1089225
>first post
Forgot to ask;
Can someone webm my shit?
https://www.youtube.com/watch?v=7cljyjUbQVU
>>1078242
steam trains look so much cooler than modern electric ones
>>1078484
Jewish piano
>>1087292
these old car mechanics videos are great, they explain things better than anything I've seen
>>1078095
This. That part breaks very easily if you don't use it correctly.
>>1088902
It locks the red gear in place.
>>1087292
Excellent video. It makes planetary gears look so simple
>>1079826
Its easier to heat treat and work harden an ingot, then machine it, rather then cast something, heat treat it, then work it back into shape.
>>1089771
Not planetary gears...
>>1080690
T most-likely useless machine element. The purpose is to demonstrate the complexity the cnc could achieve in order to sell it.
>>1075046
>the thermal drill, go get it
>>1078081
>U-joint
>not CV joint
fucking cavemen
>>1082468
Meanwhile in the Kremlin
IVAN HAVE YOU OF FIGURE OUT AMERKONSKI AA MISSLE?
yes.....? I think...or not, I confuse comrade.
found this on a walk with my dog. it's what looks like a solid sphere of polished stone, sitting on a fountain. you can spin it any direction you want, but its size and wet surface acts as a governor.
any anon know about these? i'd like to see how the sphere is made
>>1099339
Most likely in some sort of lathe/CNC process to get it perfectly spherical
>>1099339
probably an acrylic..
big ass injection mold, then polished
>>1099339
is this in some ultra-secret navy area? like 51? were you nervous or anxious?
>>1079846
most cast these days use centered steel powder, its still much weaker then solid steel, but much stronger then cast iron
>>1088902
> doubting the green crescent
Haram.
>>1089743
That is why you usually use a double cardanico joint. If the angle between the two axles is split evenly the movement is omothetic.
>>1087204
tis a joke good sir
>>1099339
It's called a Kugel Ball
>>1099339
It's a plastic ball with the map of the earth on it you goof ball.
>>1105652
There is one similar to this but without anything engraved in to it at the Pacific Science Center in Seattle.
It is made of stone. You can push it and get it up to speed but takes force and a little bit of time.
>>1075846
oh my god
>>1078242
High res version of this video anyone ?
>>1098554
>comrade, I am sure where missile isn't...unsure about my place in universe though
>>1100239
Lost.
>>1099443
Not the poster, but this is in Nashville in the bicentennial mall.
>>1088902
it's unnecessary for it to be raised to the same plane as the peg. you are correct.
>>1087292
Source: https://www.youtube.com/watch?v=yYAw79386WI
Very nice video.
>>1089615
>was always confused as to how differential gears worked
>now its totally clear
best
>>1113805
>rockets
>not engineering
kill urself my man
>>1114088
I never claimed that, but these threads are almost always just stuff like machines making stuff, cncs doing their thing, and the like. I mean look at the non-rocket posts in this thread and tell me that rockets are thematic.
>>1078081
this is the difference between engineers and mechanics (like me) on a fancy computer it looks nice but in reality that sucker would wear out and be fucked VERY quickly...
>but muh degree muh college
>>1089608
my sides
>>1082468
>Monty Python selling weapon tech to the MoD
>>1075039
watched this for two minutes not knowing it was just a loop.
H*eck you OP.
kek.
>>1112782
It would get broken and do nothing to the locomotive.
>>1099661
Sintering is used for steel parts only on special applications, like cheap gears (because you reduce time of complex machining of teeth) and small pieces. Making a big, complex shape part like the one on the demo video is really hard with sintering and is much more viable (and lead to a stronger finished piece) to make a rough forged piece and then machining it on the correct sizes and geometry.
