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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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#1
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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. |
#2
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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 |
#3
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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 |
#4
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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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