TITANIUM  ATTEMPT

Welding Up The Front Triangle

  by James Morikawa

29 February 2008

Welded up the front triangle today.  Below is a brief summary.

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Picture 1:    The rear-triangle,  and the front-triangle parts are remounted back unto the jig.   The Argon-purge connections have been installed.
Picture 2:    To purge the down-tube and top-tube I drilled small holes which I use as inlets for the argon back-purge.   Later,  I'll seal these holes up by welding.  A similar technic 
                  I use when building steel frames.  I want to see how it works out with a Titanium frame.   
Picture 3:    I did the tack-welds with the frame on the jig.  No filler material was needed for tack welding.  With tight fitting miter joints (no gaps) it very easy to
                  to weld Ti.  In my opinion,  much easier to weld than steel.  

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Picture 4:  After tack-welding,  the finish welds are done with the frame mounted on a weld fxiture.  
Picture 5:  The completed head-tube welds — single pass weld.   I decided to complete this frame single-pass,  and will leave the weld appearances as is.  If I do ride this frame.  I
                 want to see how my single pass welding hold up under actual riding.  
Picture 4:   Completed weld on the the bottom-bracket/down-tube joint.

                
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Picture 7:  The top tube/seat tube weld.  It looks ugly in the picture.  Actually the weld isn't at bad as it looks.  Just my bad photography.  
Picture 8:  The bottom bracket weld.  
Picture 9:   The  welded up fame.   The head tube has pulled slightly to th left.  It's gone out of alignment.  To be more specific,  the front to rear wheel tracking
                  is not in alignment.  I'm going to have to correct this.  Post weld alignment is required.  My next task on this my first Ti-frame.

                                                                                                   That's it for this webpage.  Bye.

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