Quit a shitty job last week, so hoping to get this frame welded up this week. Made the last big peice for the frame today. Spend two days building two different rear sections. I basically copied that area of a knucklehead frame, but it didn't look right. After alot of thinking and playing around, I made a second version that I'm really in to. I figured I'd post some pics on how I set everything up, so I could cope it. Lots of weird compound angles coming together, so I drew it out on paper and then set it up it 3d to cope(took forevvvurrr).
1200s Frame build chop
Collapse
Desktop Ad Forum Top
Collapse
Mobile ad top forum
Collapse
X
-
-
After I scrapped that here's what I ended up making
Chopper builders handbook was totally right in saying that after welding up your x brace on your rear legs, it will pull in about a 1/4". That's what happened when I took the peice I tacked on to my first peice off. I'm wondering if heating it up might receive the stress?any tips on that?
I used my homemade 7" CLR wooden die for the bends on both peices(minus the knuck copy one in the farthest bend back towards the axle plates). It gives a nice smooth radius. Got the idea from Cristian Newman, I went and copied the hole placement by taking a protools die to kinkos and copying it on their copyer. It doesn't have the spring back screw thing, but you don't really need that if your cool with always keeping pressure in your bender handle. I've done shitloads of bends with it. It's two peices glued together, and then sandwiched between plate and bolted tight
Comment
-
If you normalise all the welded joints before removing the construction tacks it will simplify your life a lot. Since you already cut it loose normalise all the joints ( heat to dull red then allow to air cool) then if it's still not aligned draw it straight.https://www.youtube.com/watch?v=IxzV9VeUpLY When I was much younger I straightened Roto mill cutters 28" od X 8' and filled with lead that warped when welded and filled by drawing with a pair of rosebuds and a bucket of water had to get them within .020 of straight.
DustyDriving that train, high on cocaine
Casey Jones you better, watch your speed
Trouble ahead, trouble behind
And you know that notion just crossed my mind​Comment
-
Just keep at it. You're not making any more mistakes than most people do and you're learning a hell of a lot. If it'll help you I'll send you the big twin and sporty plans I have. Just send me mail.
As to that neck I'd trash it. I can see from the closeups that it's way warped and twisted. Johns Necks are expensive but well worth it and worth waiting for one. You've got a jig, a motor, forks. If it becomes necessary to build a new frame you're only out the cost of tubing and is in the long run a cheap chopper education.
Comment
-
Your method of bending by the way is called pattern-bending and used in a lot of shops. Don't let anybody tell you that you're not bending correctly. If the pics aren't distorted it looks like you're using thickwall tubing. For the frame rails you only need 1x.125 and that should save you some money.Comment
300 mobile ad bottom forum
Collapse
Comment