Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work.

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Old July 16th 20, 03:51 PM posted to rec.crafts.metalworking
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Default Cutting up Golden Ray with diamond chain

On 7/13/2020 10:21 AM, James Waldby wrote:
https://gcaptain.com/heres-how-they-plan-to-cut-up-and-remove-the-golden-ray/
There's an animation of using a "diamond-encrusted cutting chain" in a video in
the article linked above, which is about how the VB-10000 will be used to cut
the Golden Ray into 8 pieces. "The public should expect a lot of noise
throughout the operation", according to the article.

It seems odd to me that they are using diamond rather than tungsten carbide.
It appears that the chain ipm will be fairly low, so absorption of diamond
into the steel being cut might not be a major problem, but I'd think properly
shaped carbide teeth would cut more aggressively and probably be less
expensive to start.

The VB-10000 was in Florida last week and will be in Georgia shortly, per
https://gcaptain.com/crews-readying-heavy-lift-vessel-vb-10000-for-golden-ray-salvage/



They should just pump it full of ping pong balls.

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Old July 16th 20, 07:05 PM posted to rec.crafts.metalworking
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Default Cutting up Golden Ray with diamond chain

On Thu, 16 Jul 2020 07:51:03 -0700, Bob La Londe wrote:

On 7/13/2020 10:21 AM, James Waldby wrote:
https://gcaptain.com/heres-how-they-plan-to-cut-up-and-remove-the-golden-ray/
There's an animation of using a "diamond-encrusted cutting chain" in a video in
the article linked above, which is about how the VB-10000 will be used to cut
the Golden Ray into 8 pieces. "The public should expect a lot of noise
throughout the operation", according to the article.

It seems odd to me that they are using diamond rather than tungsten carbide.
It appears that the chain ipm will be fairly low, so absorption of diamond
into the steel being cut might not be a major problem, but I'd think properly
shaped carbide teeth would cut more aggressively and probably be less
expensive to start.

The VB-10000 was in Florida last week and will be in Georgia shortly, per
https://gcaptain.com/crews-readying-heavy-lift-vessel-vb-10000-for-golden-ray-salvage/


They should just pump it full of ping pong balls.


Or perhaps footballs, soccer balls, and basketballs ... there are lots
of those not in use at the moment.

If it is the case that displacing all the water inside with lightweight
stuff would float the boat, I wonder whether insulating foam (eg
polyurethane 2-part spray foam) can be applied and expanded underwater?

--
jiw
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Old July 17th 20, 12:53 AM posted to rec.crafts.metalworking
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Default Cutting up Golden Ray with diamond chain



On 7/16/2020 1:05 PM, James Waldby wrote:
On Thu, 16 Jul 2020 07:51:03 -0700, Bob La Londe wrote:

On 7/13/2020 10:21 AM, James Waldby wrote:
https://gcaptain.com/heres-how-they-plan-to-cut-up-and-remove-the-golden-ray/
There's an animation of using a "diamond-encrusted cutting chain" in a video in
the article linked above, which is about how the VB-10000 will be used to cut
the Golden Ray into 8 pieces. "The public should expect a lot of noise
throughout the operation", according to the article.

It seems odd to me that they are using diamond rather than tungsten carbide.
It appears that the chain ipm will be fairly low, so absorption of diamond
into the steel being cut might not be a major problem, but I'd think properly
shaped carbide teeth would cut more aggressively and probably be less
expensive to start.

The VB-10000 was in Florida last week and will be in Georgia shortly, per
https://gcaptain.com/crews-readying-heavy-lift-vessel-vb-10000-for-golden-ray-salvage/


They should just pump it full of ping pong balls.


Or perhaps footballs, soccer balls, and basketballs ... there are lots
of those not in use at the moment.

If it is the case that displacing all the water inside with lightweight
stuff would float the boat, I wonder whether insulating foam (eg
polyurethane 2-part spray foam) can be applied and expanded underwater?


In Robert Scott's book, "God is my Co-Pilot", he describes raising a
P-40 from a river where it landed after being shot down. Native divers
kept lashing more bamboo to the wings until it floated to the surface.

Steve
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Old July 17th 20, 02:54 AM posted to rec.crafts.metalworking
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Default Cutting up Golden Ray with diamond chain



"shiggins" wrote in message ...



On 7/16/2020 1:05 PM, James Waldby wrote:
On Thu, 16 Jul 2020 07:51:03 -0700, Bob La Londe wrote:

On 7/13/2020 10:21 AM, James Waldby wrote:
https://gcaptain.com/heres-how-they-plan-to-cut-up-and-remove-the-golden-ray/
There's an animation of using a "diamond-encrusted cutting chain" in a
video in
the article linked above, which is about how the VB-10000 will be used
to cut
the Golden Ray into 8 pieces. "The public should expect a lot of noise
throughout the operation", according to the article.

It seems odd to me that they are using diamond rather than tungsten
carbide.
It appears that the chain ipm will be fairly low, so absorption of
diamond
into the steel being cut might not be a major problem, but I'd think
properly
shaped carbide teeth would cut more aggressively and probably be less
expensive to start.

The VB-10000 was in Florida last week and will be in Georgia shortly,
per
https://gcaptain.com/crews-readying-heavy-lift-vessel-vb-10000-for-golden-ray-salvage/


They should just pump it full of ping pong balls.


Or perhaps footballs, soccer balls, and basketballs ... there are lots
of those not in use at the moment.

If it is the case that displacing all the water inside with lightweight
stuff would float the boat, I wonder whether insulating foam (eg
polyurethane 2-part spray foam) can be applied and expanded underwater?


In Robert Scott's book, "God is my Co-Pilot", he describes raising a
P-40 from a river where it landed after being shot down. Native divers
kept lashing more bamboo to the wings until it floated to the surface.

Steve

=================================

The Costa Concordia was raised with floats too.
https://www.bbc.com/news/world-europe-28288823

During WW2 we built and moved huge drydocks to remote Pacific atolls to lift
and patch the damaged hulls of our largest warships.
https://www.warhistoryonline.com/mil...ard-about.html



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