Please doI would use a bolted flange around 15mm thick with a rubbet gasket in there, it instantly gives you a better USP than those pictured. V banding is cheap and nasty and i imagine will be prone to leaks down a year or two after its been split a few times.
I could quote for custom flanges if you wanted.
Material is a big cost, aluminium plate isn't cheap.the flanges i would just have profiled not much expense in them at all
Neithers waiting on a machine, Im yet to find anything cheaper than outsourcing to my local laser cutter on flat partsMaterial is a big cost, aluminium plate isn't cheap.
...10pieces allowing 5 complete units to be made.
Just be wary that in the finished state one half of the pair will have a clearance hole and the other will be threaded, so it would need to be drawn/cut at the tapping size and then drilled out after profiling.
Slightly off topic, but if you had another part that would fit in the ring/drop in the centre, is the laser cutter software smart enough to give you some sort of discount?
Looking some ideas on these every now and then I think about making my own, does anyone know where I can get the flanges machined? Spun ends, and how is the joint formed on the other tank, bead roller? What sort of jubilee is that View attachment 373057View attachment 373058
I was actually thinking of buying 300x12-15 mm flat bar and having the flanges machined from that most heavy wall aluminium pipe I've seen is never too round but it's something to think about I'd like to increase the odds and sods I make initial cost I know would be bigThe outer flanges you could do with a bead roller but if you are thinking of making a few of them you'd want a powered one.
If you're thinking of mass production maybe account for 2 or 3 sets of formers as well.
The Flange on the inner bit, you'd want a massive bead roller for that. It looks like it's been spun. A big enough press would do that but the tooling cost would be nasty plus you'd still need to get it in a big lathe to square it off and if your doing that you may as well just spin it to start with.
Might be easier to find some tube that size, cut rings out of it and weld it to the other section.
Or just make up a jig to roll flat strip around a former and weld it.
If you had the flanges machined the hole location would be easy and you could have o-ring grooves machined in as well.
If it's something that gets opened up for cleaning after each race then probably worthwhile.
If it only gets cleaned when a big end goes then a smear of sealer or a gasket would be fine.
Looking at the first photo the flanges look like plain rings with bits of tube for the bolts welded on?
If you've got a big enough lathe and can find (unlikely) some thick wall tube the right size you could chop rings from that.
I have no idea where you would get tube that size or how much it would cost but if you could part 10mm thick rings off only loosing the 3mm of a parting blade from each one it's got to be cheaper than loosing the outer and inner bits from cutting circles from square sheet.
I was actually thinking of buying 300x12-15 mm flat bar and having the flanges machined from that most heavy wall aluminium pipe I've seen is never too round but it's something to think about I'd like to increase the odds and sods I make initial cost I know would be big
As I said above I want to expand on what I make, I don't personally know anyone who makes them so asking on this forum is the next best thing,What's the end goal here? Is it for a specialist application or something?
If it's a one off, just fab one up from sheet, if it's a specialist application you might find it cheaper to just buy one customised from allisport or similar - if it's just because they seem like a money maker with the price from AH and Mocal, etc, that's because they're an established brand in a very, very tiny market - make sure you have customers first because there's plenty of no-name brands half the price already and even then they're a niche thing.
The internals are way more important than a clamp and flange. And I don't think adding weight to a motorsport part with a pair of big 12mm flanges and clamps is worth it over a v-band with an o-ring or silicon. There's a reason they're used. Or not even split at all. They're light, and you can split a tank open in seconds at an event if you need to.
End users probably wouldn’t like your design. Takes too long to open and close, too many parts to vibrate loose, and heavier than it needs be. Difficult / impossible to open in situ in most applications without removing the tank. Bear in mind most of these are motorsport use. Weight and speed of operation is what it’s all about. Form follows function, that’s why most have a v band strap.I would use a bolted flange around 15mm thick with a rubbet gasket in there, it instantly gives you a better USP than those pictured. V banding is cheap and nasty and i imagine will be prone to leaks down a year or two after its been split a few times.
I could quote for custom flanges if you wanted.
End users probably wouldn’t like your design. Takes too long to open and close, too many parts to vibrate loose, and heavier than it needs be. Difficult / impossible to open in situ in most applications without removing the tank. Bear in mind most of these are motorsport use. Weight and speed of operation is what it’s all about. Form follows function, that’s why most have a v band strap.