isitafox Posted October 14, 2015 Report Share Posted October 14, 2015 Nice, it'll be interesting to see how long this holds up compared to other home made frames we've seen. Quote Link to comment Share on other sites More sharing options...
Herbertlemon102 Posted October 15, 2015 Report Share Posted October 15, 2015 I'm impressed- it looks very nice indeed Quote Link to comment Share on other sites More sharing options...
Kenny--Trials Posted October 15, 2015 Author Report Share Posted October 15, 2015 (edited) Nice, it'll be interesting to see how long this holds up compared to other home made frames we've seen.To be honest i dont have masses of hope for it because it feels waaayyy too light but we shall see I'm impressed- it looks very nice indeed thanks Edited October 15, 2015 by Kenny--Trials Quote Link to comment Share on other sites More sharing options...
*gentlydoesit Posted October 16, 2015 Report Share Posted October 16, 2015 Nice.Is the dent in the top tube intended for gusseting? And the bottom chain stays join really central on the bb, another gusseted area? Spoze I could wait and see.. but where's the fun in that Quote Link to comment Share on other sites More sharing options...
Kenny--Trials Posted October 16, 2015 Author Report Share Posted October 16, 2015 Nice.Is the dent in the top tube intended for gusseting? And the bottom chain stays join really central on the bb, another gusseted area? Spoze I could wait and see.. but where's the fun in that I was really hoping nobody would notice the dent haha, but yes it is. And yeah the bottom bracket is also somewhere I'm going to gusset to hell. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted October 16, 2015 Report Share Posted October 16, 2015 Great work Got someone to do the heat treating for you? Quote Link to comment Share on other sites More sharing options...
Kenny--Trials Posted October 16, 2015 Author Report Share Posted October 16, 2015 (edited) Great work Got someone to do the heat treating for you?Thanks I asked one of my friends at work about that and they said that it doesnt need to be heat treated at all because aluminium hardens over time (after being heated) and will go back to its original temper from when it was made Edited October 16, 2015 by Kenny--Trials Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted October 16, 2015 Report Share Posted October 16, 2015 7005 does over the course of around 3-4 months, but I don't believe 6082 does... worth having a look on matweb.com though. Quote Link to comment Share on other sites More sharing options...
*gentlydoesit Posted October 16, 2015 Report Share Posted October 16, 2015 Oh, it will harden... but the timescale is huge. It's not called aging for nothing Quote Link to comment Share on other sites More sharing options...
Kenny--Trials Posted October 16, 2015 Author Report Share Posted October 16, 2015 (edited) It might not harden fully anytime quick, but im pretty sure that a significant part of it is done in the first week of it being heated, possibly the first few days EDIT: Been looking on aalco's website which is the aluminium supplier we have at work and it states that age hardening works on 2000 series, 6000 series and 7000 series Edited October 16, 2015 by Kenny--Trials Quote Link to comment Share on other sites More sharing options...
*gentlydoesit Posted October 16, 2015 Report Share Posted October 16, 2015 (edited) True, but it won't regain it's temper. I've read about 20-30ksi is the best you could expect, though I've no clue how that relates to actual riding forces.With a big enough oven and a bath of cool water for the quench you could 'theoretically' temper it your self. The temperature needed to harden it is low enough that a domestic oven could work, and its a low enough temp that the frame wont warp. Obviously some research into correct heat/timing method wouldn't go a miss, and annealing the entire frame prior would be necessary but I can't see a reason why it wouldn't work. (Considered it myself ) Edited October 16, 2015 by *gentlydoesit cuz spelin Quote Link to comment Share on other sites More sharing options...
Kenny--Trials Posted October 16, 2015 Author Report Share Posted October 16, 2015 it really wouldn't fit in a domestic oven so id need to take it to a specialist to get it hardened which may or may not be worth the time/money. Because this is the first frame ive done, im expecting to have to re-weld it at some point which would remove the temper in a large area around that and im expecting that to get it hardened would be fairly expensive. I have used special magnesium alloy welding rods which are much stronger than the ones what we would normally use for aluminum tig welding. I think im just going so see how age hardening goes as i do want to make a few more frames so it wouldnt be the end of the world if it did break and ill be much better at alu-tig welding then anywayAlso i just had the idea that it might become brittle if it was too hard, thoughts? Quote Link to comment Share on other sites More sharing options...
*gentlydoesit Posted October 17, 2015 Report Share Posted October 17, 2015 Mentioned self hardening ( ) because a friend of mine has the biggest auger oven ever seen, what I was planning would deffo fit in that bad boy A few practice runs of the frame is probably not a bad idea, tweak the design if you find any weak spots ect.. but if its not hardened you'll always wonder if it snapped due to strength or design.. So many failed re-welds on tf. (though not all do)If it's annealed before its hardened it should be fine. It'll only become brittle if it still has temper before you harden it. Some filler rod becomes brittle in tempering too, can't remember which though.Guess the proofs in the pud, can't wait to see how well/long it rides. It's still a great project no matter the outcome Quote Link to comment Share on other sites More sharing options...
Kenny--Trials Posted October 17, 2015 Author Report Share Posted October 17, 2015 Ah right, no im definitely not high class enough for an oven that size I was speaking to my boss today and he said that hardening isnt that expensive so i think ill look a bit more into it. And you're totally right about the design/hardness problem.ill have to do a google search of which rods it is thenit has been a really great project and i really want to make another one now i know what went well and what didnt Quote Link to comment Share on other sites More sharing options...
Kenny--Trials Posted November 22, 2015 Author Report Share Posted November 22, 2015 It's finally finished!! So here it is... So far it rides fairly well but the rear brake makes the frame flex so much and so I definitely need a booster 3 Quote Link to comment Share on other sites More sharing options...
David Biddle™ Posted November 22, 2015 Report Share Posted November 22, 2015 looks good Kenny didn't realise you were gonna make your own frame. Quote Link to comment Share on other sites More sharing options...
ItsMatt Posted November 24, 2015 Report Share Posted November 24, 2015 looks a bit messy but functional, good work. Quote Link to comment Share on other sites More sharing options...
Kenny--Trials Posted November 24, 2015 Author Report Share Posted November 24, 2015 On 11/22/2015, 10:25:59, David Biddle™ said: looks good Kenny didn't realise you were gonna make your own frame. cheers biddle 3 hours ago, ItsMatt said: looks a bit messy but functional, good work. it is messy because i haven't done much aluminium welding yet but i hope to make another better one in the next few years Quote Link to comment Share on other sites More sharing options...
Pít Posted November 24, 2015 Report Share Posted November 24, 2015 I like it too! Whats the geometry? Seems pretty short and high. Quote Link to comment Share on other sites More sharing options...
Kenny--Trials Posted November 24, 2015 Author Report Share Posted November 24, 2015 50 minutes ago, Pít said: I like it too! Whats the geometry? Seems pretty short and high. I haven't measured it off the bike but it should be 995mm wheel base, 350mm chainstays and +95 bb height 1 Quote Link to comment Share on other sites More sharing options...
sdsggsd Posted November 26, 2015 Report Share Posted November 26, 2015 I've used a press-fit frame in the past that didn't have that, and the bearings would feel silky smooth just in your hand. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted November 26, 2015 Report Share Posted November 26, 2015 Welding looks pretty decent to me - a layer of powdercoat and it'd look totally different! Quote Link to comment Share on other sites More sharing options...
Ónodi István Posted March 11, 2016 Report Share Posted March 11, 2016 Looks really solid! What's the weight? Quote Link to comment Share on other sites More sharing options...
lifes-a-trial Posted March 13, 2016 Report Share Posted March 13, 2016 I think for your first attempt you have done well. Gentlydoesit is right about the design aspect with hardening but all in all It looks quite good and you will buzz off the fact that you made it . Quote Link to comment Share on other sites More sharing options...
Macca88 Posted March 18, 2016 Report Share Posted March 18, 2016 Well done for building your own frame, I wanted to do this at my old place of work but titanium tubing is expensive. On the next frame, personally I'd spend a little more time cleaning the tubes with scotchbrite before welding to eliminate the black/dirt around the welds. Get the tubes as shiny as possible for the cleanest welds. And maybe an acid dip and wash to clean the frame and finish it off nicely Quote Link to comment Share on other sites More sharing options...
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