Welding Sequence Bike Frame

Frames are then welded one step at a time in a special sequence. Above is a Mission frame made of 4130 chromoly steel thats been TIG tungsten inert gas welded.

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Should a frame show any signs of misalignment during the welding process we alter the weld sequence process or cold-set the weld to pull the frame back into perfect alignment.

Welding sequence bike frame. The joint is heated with a hand-held torch then brazed together using silver or brass silver is shown here. Once your frame has been welded and its alignment checked its ready to have brake bosses cable guides rack mounts and other parts welded on. I tig weld a bicycle frame alignment table from steel plate and square tubeResourcesCarl Strongs - Aligning bike frame through sequence of weldinghttps.

This is a 2nd dress pass welding sequence of a custom titanium bicycle frame. Higher end frames will be TIG welded and more often fillet-brazed together. All of the bike was tig welded using pulse tig.

That little wire you see is the silver. In between each step alignment is checked to verify that the frame is behaving as expected. What youre seeing is raw steel tubing with a clear gloss powder coat.

We begin by misaligning the frame a predetermined amount. 33 pps 33 pulse on time 33 background current. Im Joe Roggenbuck aka Cobra Framebuilding.

Each tool fixture and jig are adjusted for your frame. You weld a little here a little there a little here and a. The gold stuff is brass fillet joining the steel tubing.

Fillet brazing is when a fillet of brass is brazed onto the mitered or notched tube joint. The area being welded is the headtubedowntubetoptube junction. Static and dynamic mechanical analysis was done on the design to test its rigidity and strength.

Jeff Palhegy reminds us that when welding a frame together You dont just weld one side up and then forget about the other side. Any necessary corrections are easily made at this point. There is no point to this it was just an excuse to make something.

Please inquire as to the availability of instruction in fillet brazing. An existing frame of Hero cycle as a reference for design. On this channel I provide tips and discussions about bicycle framebuilding TIG welding and related subjects.

About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy Safety How YouTube works Test new features. All materials are available through Ti Cycles. This paper talks about selection of material for bicycle frame and their comparison.

The frame is designed in the CAD Pro software and tubes are machine mitered on our mill. Another Mission powder coated blue. An existing frame of Hero cycle as a reference for design.

This is a dress pass welding ti GR5 at the bottom bracket pulsed arc procedure About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy Safety How YouTube. The frame is checked for alignment on our alignment table throughout the welding process. TIG welding is a more economical quicker method with the tubes all mitered and assembled into a jig until welded together.

Mitered tubes are set on the jig tacked and then welded. TIG welded joints are the most common type today found on lots of bikes and lots of styles. These parts are tacked and welded to the frame using a method similar to that used to tack the frame.

I tig welded up the bike frame using some of each rod. The front half with the larger tubes with the weldmold 880 rod and the back part from the seat post tube backward using ER70S-2. Because of this we have developed a weld sequencing and aligning process.

EnjoySome stuff I used in this videoPipe cutter - httpsamznto2jLJa8oHacksaw - ht. I make tools for bicycle framebuilders. Same procedure for the dropouts.

Close-up of the process. It is melted into the joint by the torch. The cost of a Ti Cycles steel frame building seminar is 2400 for instruction plus materials for a lugged or TIG welded frame and fork.

Above is the bottom bracket shell of a frame thats been fillet pronounced fill-it brazed. Aligning bike frame through sequence of welding.

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