Relative benefits of welding vs brazed lugs vs fillet braze

[FluffyChicken]

Re:

It's a right bugger to welded carbon tubes together ;-)

 

[FluffyChicken]

Re:

<snigger> he said Butt Checker..<snigger>

 

[danson67]

<snigger> he said Butt Checker..<snigger>

Oh yes...and not much need for subtle innuendo or double entedre :shock: :


All the best,

 

[danson67]

OK...we've got away from the OP's brazed/lugged/TIGged steel question, so just to finish this off...here's a pic of a titanium Engin frame mid-build:

You can see the difference between the initial fusion pass and the second top pass.
Also note the superb gas shielding and cleanliness...no discolouration whatsoever on both weld passes.

The second pass can be run hotter and wider, as there is very little risk of burning a hole or edge from either tube, as they are already joined physically, and so also tend to be matched in temperature distribution.
This allows the finish to be smoother and more even than a single pass weld.

So here's the cosmetic difference...I've picked 2 anonymous examples which are firmly in extremes of the two camps. There's a world of other examples between them, so you can't be definite which method has been used without asking the builder:

Single pass:

Double pass:


All the best,

 

[legrandefromage]

Aesthetics are everything with some people.

I prefer the engineered look of my battered old Zaskar rather than the robotic welds on an Arrowhead.

As for titanium...?

Hmmmm. Its a toughy, I like both!

 

[cherrybomb]

Re:

Beautiful work on that Engin.

 

[one-eyed_jim]

OK...we've got away from the OP's brazed/lugged/TIGged steel question, so just to finish this off...here's a pic of a titanium Engin frame mid-build:

Here's the same thing bigger:

https://tinyurl.com/ycnnaear

Lots more interesting pictures on Engin's Instagram feed:

https://www.instagram.com/engincycles/

 

[M-Power]

OK...we've got away from the OP's brazed/lugged/TIGged steel question, so just to finish this off...here's a pic of a titanium Engin frame mid-build:

You can see the difference between the initial fusion pass and the second top pass.
Also note the superb gas shielding and cleanliness...no discolouration whatsoever on both weld passes.

The second pass can be run hotter and wider, as there is very little risk of burning a hole or edge from either tube, as they are already joined physically, and so also tend to be matched in temperature distribution.
This allows the finish to be smoother and more even than a single pass weld.

So here's the cosmetic difference...I've picked 2 anonymous examples which are firmly in extremes of the two camps. There's a world of other examples between them, so you can't be definite which method has been used without asking the builder:

Single pass:

Double pass:


All the best,

Awesome post

Love details like this ! Makes me appreciate a beautiful signature Ti Single pass weld even more.

 

[ultrazenith]

One of the things I enjoy most about this forum is being able to ask (often dumb) questions and get the most amazing and educational replies from experts.