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Cad drawings

BenBrooks - 3/12/12 at 07:04 PM

Has anyone got any cad drawings of Haynes roadster/ sierra parts. I've found a 3d printing company doing Steel titanium and aluminium and thought I'd amuse myself with a quote.

Cheers
Ben

PSpirine - 3/12/12 at 07:13 PM

A pair of front uprights in aluminium will be about Ł10-15k as an estimate (can't imagine it costing much less than CNC machining for something like an upright). Enjoy

BenBrooks - 3/12/12 at 07:16 PM

like i said, simply amusing myself as this 3d printing is pretty cool stuff.

bi22le - 3/12/12 at 07:18 PM

I dont find Ł10K very funny!!

Oh wait, each?

Yeah, thats funny.

Ill have some for the back end too please Santa!

balidey - 3/12/12 at 08:26 PM

From what I've seen of 3d printed alloy, its nowhere near like the strength you would expect from a die cast or machined alloy piece.
So you may as well get a quote for the plastic rapid prototype items, it'll be just as relevant.

coyoteboy - 3/12/12 at 09:44 PM

Done properly it'll be ~80% normal strength at least. But that's done properly, on a machine costing half a million quid. And it'll cost in the region of 10-15K PER upright, at least, again if done properly.

I could understand it if you were planning to make a 1:20th scale model!

I've recently been quoted Ł150 per upright to machine from billet, personally seems like more sense

phelpsa - 3/12/12 at 11:40 PM

It can be very strong, but as it is more similar to sintered materials they tend to be very brittle and not very good in fatigue.

One interesting use of it is in the roll hoop of a F1 car where fatigue isn't an issue (it's only ever loaded once!)

coyoteboy - 4/12/12 at 12:32 AM

Indeed, the granular structure tends to cause fatigue problems due to micro crack propagation. SLM is less prote to it than SLS but still applies.

designer - 4/12/12 at 09:30 AM

3D printers are excellent to make a former in plastic to make the mould to cast a proper part.

coyoteboy - 4/12/12 at 10:22 AM

That's very true, but it is a historic view really.

vanepico - 5/12/12 at 05:58 PM

If you're talking about something like alumide which is a mixture of aluminium and plastic it will be very brittle, but it says it can be ground, drilled and finished, on the datasheet.

I can't imagine how they can 3D print something out of solid metal without it heating to 1000+*c

[Edited on 5/12/12 by vanepico]

phelpsa - 5/12/12 at 06:08 PM

quote:
Originally posted by vanepico
If you're talking about something like alumide which is a mixture of aluminium and plastic it will be very brittle, but it says it can be ground, drilled and finished, on the datasheet.

I can't imagine how they can 3D print something out of solid metal without it heating to 1000+*c

[Edited on 5/12/12 by vanepico]

Not talking about alumide, thats a very different material (and not a particularly nice one!).

3D printing in metal is now commonplace. It is fused in layers of 20-30 microns with a laser.

vanepico - 5/12/12 at 06:18 PM

I'm pretty sure even then it is fused by a UV sensitive glue which isn't going to be as strong as actual metal

phelpsa - 5/12/12 at 07:15 PM

quote:
Originally posted by vanepico
I'm pretty sure even then it is fused by a UV sensitive glue which isn't going to be as strong as actual metal

Nope. The metal is fused together.

coyoteboy - 5/12/12 at 07:16 PM

quote:
Originally posted by vanepico
I'm pretty sure even then it is fused by a UV sensitive glue which isn't going to be as strong as actual metal

You can be as sure as you like, but you're wrong

(Good friends with someone who designs and makes the machines).

For info, titanium F1 roll hoop designed to withstand 120kN frontal impact while weighing 1kg, made entirely this way:

SLM machines are ace

https://www.youtube.com/watch?v=4odUhDjKHzo

[Edited on 5/12/12 by coyoteboy]

bi22le - 5/12/12 at 07:23 PM

quote:
Originally posted by coyoteboy

quote:
Originally posted by vanepico
I'm pretty sure even then it is fused by a UV sensitive glue which isn't going to be as strong as actual metal

You can be as sure as you like, but you're wrong (Good friends with someone who designs and makes the machines).

For info, titanium F1 roll hoop designed to withstand 120kN frontal impact while weighing 1kg, made entirely this way:

SLM machines are ace

https://www.youtube.com/watch?v=4odUhDjKHzo

[Edited on 5/12/12 by coyoteboy]

So how do they then bolt the roll hoop on?

coyoteboy - 5/12/12 at 07:25 PM

I've no idea, though I suspect they have a set of threaded holes underneath. Or maybe it's incorporated into a composite structure, since you can make less than 100% dense materials you could allow a metal/composite boundary to merge and couple nicely. (That's not my photo and I didn't see that being made, but I have seen many other parts made that way)

[Edited on 5/12/12 by coyoteboy]

sylva_phoenix - 20/12/12 at 09:01 PM

I just had a quote back from a casting specialist who wanted Ł9000 for a one off turbo manifold. Think I'll be fabricating that myself then....

coyoteboy - 20/12/12 at 09:07 PM

Cast it yourself? Get collecting coke cans.

blakep82 - 20/12/12 at 09:13 PM

quote:
Originally posted by vanepico
If you're talking about something like alumide which is a mixture of aluminium and plastic it will be very brittle, but it says it can be ground, drilled and finished, on the datasheet.

I can't imagine how they can 3D print something out of solid metal without it heating to 1000+*c

i flasers can be used to cut metals, i wonder if 2 lasers are used on a sort of X and Y axis, and where they cross is hot enough to melt the metal on to the last layer? i think like how these work maybe?

http://www.youtube.com/watch?v=8HRyvCOZ2eM