Wednesday, November 26, 2008

Front triangle is done... mostly

Well I got a little discouraged last weekend... I thought I had the fork all jigged and straight but once I was done brazing and cleaned it up it was WAY off. I am not sure if I will try and fix it by reheating and taking the legs off, or just hang it on the wall as a reminder that anything can and will go wrong if I am not careful.
But I motivated myself to take my time and finish up the front triangle, I feel I am getting the feel for heat and being able to read the metal (even though the pictures don't show that). Last night I finished up a point on the head tube/top tube that didn't fill all the way in, but I realized how to recognize the metal temp and when it is approaching a critical temp... it's a cool feeling to know where that over heat line is and how close I am to it.


The seat clamp was a long preheat but I kept it pretty clean so I won't have too much extra clean up.


You can see here that the flux burned a little but it isn't as bad as it looks... I think it is more on the surface of the flux because it washed right off... but I have had a little more practice this week and I am way more comfortable with the temps.





The cable braze-ons were interesting because they moved just slightly which took them out of alignment but I am ok with it. My wife couldn't even see that they are out of alignment so I figured that is a good sign.


This week end I might be able to work a little on the rear triangle... but we will see.



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The lessons I am learning are amazing and really fun to work out...

The pictures below are the work I did last night, finished grinding the bottom bracket sockets.
Notched out the seat stays to fit the drop outs...
And the big big moment... doing my 1st miter on the seat tube (Tim calls this one the most forgiving miter and he is right)

I think that many of the lessons and techniques I have learned from wood working are carrying over into metal working very nicely.

bottom bracket, right side done (before finshing sanding)

bottom bracket, right side done (before finshing sanding)
the left socket is just starting to get ground, notice how thin the walls of the right socket have gotten. there is a lesson there and you will see in following pics!

grinding with a stone

grinding with a stone
it took a while with this stone but with the tight corners I had to use it because I only have one small sand paper bit left

ooh ahhh... a little sparks flyin

ooh ahhh... a little sparks flyin
That lesson I spoke of earlier is happening in this pic...

Ahhh... oh DOH!

Ahhh... oh DOH!
is that blueing? Yup that is the lesson that I learned on this socket. the grinding stone heats the metal very fast and as that wall gt thinner it started blueing. Bad, bad, bad! so I will have to sand and reshape that wall a little because I even got some chipping around the blue.

Chain stays with the drop outs notched in...

Chain stays with the drop outs notched in...
So this one was a little scary because I wasn't sure if I would get them straight and true... it ended up ok but I can do better.

Notching wasn't to hard but keeping everything even was hard

Notching wasn't to hard but keeping everything even was hard
I decided to try the bevel sides on the notch, I think I can do better so I may do the stays again?

The big moment... my first miter!

The big moment... my first miter!
I should have taken some before during and after shots but this went pretty fast actually. this is the ruff cut, I rounded it out better and got rid of that hump on the back wall

A little different angle... check out my home made tube holder... works like a charm!

A little different angle... check out my home made tube holder... works like a charm!
I am so proud of the wood block tube holder... now I just have to make the other sizes

A quick fit test...

A quick fit test...
Not bad forthe 1st miter and fit check... I only need to file the inside edges to match the bevel of the inside of the BB

Nother fit check after some finishing

Nother fit check after some finishing
still need to angle the inside of the edges then it is done and ready for finihsing before brazing. I also still need to finish the socket wall to clean up any uneven edges or tooling marks