Hobart Institute of Welding Technology

[commuter ebikes]

I am going to go to this school https://www.welding.org/wp-content/u....5.18.docx.pdf after I finish the classes at United Bicycle Institute. I am doing the Structural Welding Program which is 23 weeks (page 7 in the link). Anybody can go here and take whatever class interests them. I will go there on all of my vacations for five years.

I did a lot of research as to which welding schools are the best. Hobart Institute of Welding Technology (in Troy, OH) and Tulsa Welding School seemed to be the top two. Georgia Trade School seemed to come in third place.

United Bicycle Institute teaches nothing about welding other than brazing and TIG on 4130 Chromoly and TIG on Titanium. My battery boxes are aluminum. I can foresee a use for SS parts somewhere on the bike as well as some application calling for MIG.

[commuter ebikes]

For those interested in a formal education in both manual and CNC machining, this 384 hour program http://www.lonestar.edu/Machining-Master.htm is the only vocational school that I found whose program includes instruction in manual machining and manual tooling. You can't find many places teaching the old ways!

A book entitled The Machinist's Bedside Reader is also a good source for manual operation of machine shop tools.

I am more interested in the manual operation of a mill and lathe due to my financial limitations. A small or medium Grizzly machine is affordable, but I would never be able to afford a CNC machine.

[commuter ebikes]

Here is a picture of a professional frame builder holding a #9 torch on .035" CREW tubing (used for practice). Thank you to Rich B. for teaching me this.

The electrode is 1/16" 2% ceriated sharpened to an approximately 30 degree angle with no blunting of the tip. The filler is .035" ER70S-2. The Miller Maxstar 200 set to a max of 154A DCEN. The pulse is set to 1.6 PPS. The peak is set to 25% and the background current is at 10%.

The welder does not need to feed the rod because he will only weld a bead of up to 30mm in length (usually only up to 20mm). The bead is 4-5mm wide. The welder uses the lay wire technique, pushing the filler rod both down on and in to the puddle.

The welder will tie in to the preexisting bead (or tack) by backing up 2-3 circles and starting there. Note the wood palm rest.