12 Replies to “More Fusion 360 Fun”

  1. Keep in mind that there is a certain amount of spring back when bending steel. You actually need to slightly need to over bendAlso keep an eye on the radius of your corners.

  3. I like it! Never thought of the wide jig to make the bends for the bottom. I was thinking along the lines of an AK jig. This maybe better

    This is just me thinking on the key Board.. A piece of 3/4″ thick steel could be used for the bottom. I’m thinking 1-1/2″ thick steel could be used for the top or something could be welded together for the top.

    May I ask what size of sheet steel you are planning on using for the upper and what dimension you are using for the upper.

    P.S> Thank You for sharing. PLEASE CONTINUE

  4. Interesting. I have no experience using jigs to bend flats. We just lurk to see what’s possible. But wanted to leave a comment to publicly show our support for you and your projects. We don’t have any AR-180’s in the Armory reference collection and are on the hunt. Which is why we have been following you for quite a while.

    Marky

  5. Love to see your progress and jealous.
    I wont ask about the printing of grips………………that would be in poor taste.

  6. LOOKS GREAT TO ME… MY THINKING WOULD BE TO TURN “ASSEMBLIES” OVER PUTTING THE THINNER DIES ON HEAVY BASE OF PRESS AND USING PLENTY OF WD-40 PUSH THE HEAVY IRONS DOWN INTO SHEET METAL AND DIES

  7. Drives me nuts when fixtures and or dies are called “jigs”. But that’s just me I guess.
    I’m agreeing with Chuck re springback. Maybe not so much if using CRS/mild steel but for sure an issue if using 4130 as Armalite did. Annealed 4130 likely not so much but if using the more commonly available normalized
    springback will really bite you.
    Pete

    1. I still struggle with the terms jig, fixture, and die. I use them interchangeably and they are not. I’m actually thinking that something like this flat sided upper it would be better to use press break. You have mentioned in the past having some repair section made up when you rewelded AR-18’s. Is that how they were built?

      1. I had the sections bent up at a fab shop that did them using a press brake. They did the bends that were to be the bottom bends first then did a bend down the center for access to do the upper bends then flattened the center bend ending up with the tube with a somewhat wide bottom opening.
        Having had the experience with the Sturmgewehr dies, I’d make dies for the tubes if wanting them now. Looks to me your pictures are spot on.
        Gotta put the ribs in though. That will make dies quite a bit more work but ought to be there so they look right.
        Pete

  8. These are just my thoughts; If the upper was left flat but made from 14 gauge steel like the Leader why wouldntt that work?

    1. Are not those Leaders around .050 or .060? 16 gauge is right at .063, 14 gauge would be thicker than that.
      Pete

      1. You could be right on the thickness; but I thought the Leaders used the British wire and gauge system which made them a little thicker. Something similar to 15 gauge USG

        I suggested 14 gauge USG standard which is .078 thick, only as a way to reduce the need for strengthening ridges. Either way, it would be interesting to see a build

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