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Yeah, quenching brass or copper doesn't change anything but how fast it gets cool, not like with steel. On a large complex part it could cause distortion if it cools unevenly, but that isn't a problem with sheet stock like this. It's surprising how easy annealed brass will bend, to a point. As soon as it work hardens it just stops moving. For the thicker copper endcaps for the boiler it will take several heatings and bendings to get the cap shape, since it needs to reform more, not just bend.
After being gone for a couple of weeks, I'm now caught up. Lots of progress.
Quote from: crueby on February 20, 2017, 09:40:58 PMYeah, quenching brass or copper doesn't change anything but how fast it gets cool, not like with steel. On a large complex part it could cause distortion if it cools unevenly, but that isn't a problem with sheet stock like this. It's surprising how easy annealed brass will bend, to a point. As soon as it work hardens it just stops moving. For the thicker copper endcaps for the boiler it will take several heatings and bendings to get the cap shape, since it needs to reform more, not just bend.That's one of the amazing things I learned about metal.I like this forum. Great explanations and help.
Great stuff Chris. Sorry to hear you were down with a cold, hope you are feeling better.---Brian
Quote from: Brian Rupnow on February 21, 2017, 12:19:54 AMGreat stuff Chris. Sorry to hear you were down with a cold, hope you are feeling better.---BrianThanks Brian! I was worried when it first hit with such severity, but it has receeded remarkably quickly. Maybe the shop elves put some magic into that last batch of the cookies...! Feeling much better now, just need to get the full strength back again.
Quote from: crueby on February 21, 2017, 12:23:30 AMQuote from: Brian Rupnow on February 21, 2017, 12:19:54 AMGreat stuff Chris. Sorry to hear you were down with a cold, hope you are feeling better.---BrianThanks Brian! I was worried when it first hit with such severity, but it has receeded remarkably quickly. Maybe the shop elves put some magic into that last batch of the cookies...! Feeling much better now, just need to get the full strength back again.I would wish for half your strength.
It does take a few tries to learn how long to cut them to
Quote from: crueby on February 21, 2017, 04:33:28 PMIt does take a few tries to learn how long to cut them toMy rule of thumb is 1.5 times the rivet shank diameter, which would be 3/32. I drill a hole in a scrap piece of stock to make a cutting guide. How close does this match what you are doing?Dan
Chris,I make the dies match the factory head with a slight bit sticking out so the die does not make a mark on the plates.Here is the formula for set allowance for British practice:http://www.sapphireproducts.co.uk/641t1.htmI just rounded S=1.429D to S=1.5D.Dan