making a bull bar for my car. using 32.nb 3mm wall thickness.
when i bent it the pipe crushed a little bit and the bend was under 45* probably 20-30* why is this? i was told that the pipe will bend. the pipe is from ONE STEEL
Those hydraulic benders aren't the best thing to use, most of them seem to crush the pipe but there is something you can do to help prevent it, fill the tube with sand and cap the ends off before bending.
i know they arnt the best thing to use but it do. ive been told by my dad that he has bend hundreds of pipes with that style of bend over the years with no problem. maybe the just dont make pipe like they did?
i will try the sand filling. also will it matter where the seam is?
make sure your formers are a good fit on your tube i'm going through this with a motorbike frame
ive ended up borrowing a proper former off a horizontal machine
and making some outer rollers
make sure formers are smooth and apply loads of wd 40 to formers and tube
its all this weird science about tube and pipe being totally different sizes
but i think im getting there now
In the construction of brass instruments such as trombones etc they fill the pipes with water, cap the ends and freeze it. Then they bend it. I'm not sure if this would help with steel because brass is a significantly softer material, but it could work. :S
And even if it doesn't fracture when you are bending it I expect you'll have to normalize it sufficiently.
Ah yeah, I can see how that could work.
The washing up liquid similar solute will obviously be more viscous than the water and will have a lower freezing point. This by some means must make it less brittle by either not freezing the solution completely or changing the properties of the ice.