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View Poll Results: Would you buy a basic $5000 car?
In a heartbeat 3 6.00%
Yes, but only if it was dependable 9 18.00%
Yes, but only if it had a tiny engine and manual trans 11 22.00%
Depends, not sure, maybe 13 26.00%
No, it would probably be a rolling piece of junk 3 6.00%
No (other) 11 22.00%
Voters: 50. You may not vote on this poll

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Old 02-13-2023, 01:34 PM   #91 (permalink)
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I watched that video!

Do you think that people with normal means would ever buy 3d metal printers to keep their old cars on the road?

I broke two serpentine belt tensioners on Mom's Camry and the power steering pump on my Accord because you were supposed to put a great deal of torque on an aluminum part, so I have always wondered about marking part of that out of steel.

I cannot think of any metal parts that have failed on my car, but I could totally seeing someone making a stronger replacement.

Hey freebeard, I am glad you remembered my post!

It is too bad they failed. They did interesting work!

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Old 02-13-2023, 03:39 PM   #92 (permalink)
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The one at Today, 08:42 AM?

Why are looking for a metal-to-metal replacement? Wut about steel-infused PLA? Heat treated HPLA? Waste-PLA casting metal parts?
Quote:
https://www.proto-pasta.com › products › stainless-steel-pla
Stainless Steel PLA - ProtoPlant, makers of Proto-pasta
Protopasta Stainless Steel PLA filament is a dense material that prints as easily as standard PLA but results in heavy cast metal looking prints that can be brushed, sanded, or polished post-print to achieve amazing results. Using real steel powder, this premium, metal-filled steel PLA filament is perfect for jewelry, costumes, props, figurines, crafting, robots, or any other 3D prints needing ...
Stock up on ruby nozzles, this stuff eats them.
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Old 02-13-2023, 11:44 PM   #93 (permalink)
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Quote:
Originally Posted by Xist View Post
I had read that 3d-printed metal wasn't as strong as forged, people responded "That is stupid, metal is metal," but everything I see now says that 3d printed metal is stronger.
A forged metal part can actually be weaker when it's not properly treated, as the forging process may disturb the molecular structure of the alloy. No wonder the forged steel crankshaft of the 4-bearing Chevy Stovebolt Six was more prone to break than the cast-iron crankshaft of the 7-bearing engine which replaced it.
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Old 02-16-2023, 01:32 PM   #94 (permalink)
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why no basic cars?

With no-doc financing, and $ 1.4-trillion is USA auto loan debt, for the USA market alone, consumers who can live further beyond their means than at any other time, probably don't feel constrained by 'economic' concerns.
I thought that the TATA Nano would be a hit in India. No dice! Television said pay three-times the money for a Corolla. Perceived benefits from advertising won!
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Old 02-16-2023, 08:09 PM   #95 (permalink)
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I always anticipate an auto loan bubble burst, but haven't seen it yet. Keep waiting for a glut of used cars to choose from at low prices.

Anyhow, the average age of a new vehicle buyer is 54. The median salary of 45- to 54-year-olds is $1,224 per week or $63,648 per year.

People wanting affordable vehicles just buy them used, and those capable of affording a new vehicle are capable of affording a more expensive one.
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Old 02-19-2023, 09:29 PM   #96 (permalink)
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Quote:
Originally Posted by cRiPpLe_rOoStEr View Post
A forged metal part can actually be weaker when it's not properly treated, as the forging process may disturb the molecular structure of the alloy. No wonder the forged steel crankshaft of the 4-bearing Chevy Stovebolt Six was more prone to break than the cast-iron crankshaft of the 7-bearing engine which replaced it.
If you want strength single crystal casting is where it is at. Fun stuff from my first job after school.


https://www.americanscientist.org/ar...single-crystal
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Old 02-19-2023, 10:27 PM   #97 (permalink)
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So how do they put in the tiny little holes?
Quote:
To maintain these temperatures, turbine airfoils subjected to the hottest gas flows must be cast with intricate internal passages and surface hole patterns needed to channel and direct cooling air (bled from the compressor) within and over their exterior surfaces.
Is it cost competitive with 3D printing?
Quote:
https://newsroom.porsche.com en ...-rs-21462.html
Innovative pistons from a 3D printer for increased ... - Porsche Newsroom
For the first time, the pistons for the high-performance engine of the 911 flagship model, the GT2 RS, are now being produced with a 3D printer. 3D printing allows the pistons to be manufactured with a structure that is optimised for the loads acting on the pistons. As a result, the pistons from the advance development project weigh ten percent ...
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Old 02-19-2023, 11:59 PM   #98 (permalink)
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So how do they put in the tiny little holes?
The interior passages are created by a ceramic core (which is injection molded). The core goes into the wax injection die. Wax is injected into the die around the core. That wax part is then dipped in various ceramic slurries that dry to create a ceramic shell around the wax part. Then the wax is melted out leaving a ceramic mold. Titanium super alloy is then poured in while the mold is inside a vacuum chamber. After the pour the outside shell is broken away and the inside shell is dissolved. That leaves the part with internal cooling passages. Then it goes on to finishing operations.

Quote:
Originally Posted by freebeard View Post
Is it cost competitive with 3D printing?
Not even close. Each part has millions of dollars in tooling. Precision Castparts in the Portland area makes these types of aerospace parts. I worked for their primary competitor - Howmet.

It was fun to work on things like this - years before they were known to the general public. Still by far the most technically challenging job I've worked.

X-47B

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Old 02-21-2023, 03:17 AM   #99 (permalink)
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If you want strength single crystal casting is where it is at.
Cost might justify for aircraft engines, but I'd take its suitability to an econobox with a grain of salt.
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Old 02-21-2023, 10:44 AM   #100 (permalink)
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Quote:
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Cost might justify for aircraft engines, but I'd take its suitability to an econobox with a grain of salt.
Of course it isn't suitable for making parts for econoboxes. However, the topic moved on from econoboxes to relative strength of metal parts from different forming processes.

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