HVAC parts Square to Rounds 26 GA galvanized

I have made quite a few square to rounds over the years but this is the first using a CNC.

Over the years I became very familiar with laying out and fabricating square to rounds by hand.

When SketchUp came came out I started laying out fittings in that CAD environment , Acquiring all the true lengths, then stepping out the points with a compass on my sheet metal.

Then I bought a bigger printer and could print out sometime 20 pieces of paper glue them down to the sheet metal, then cut out of the fitting.

I have been trying to move as much as my work flow over to fusion 360 . I had to learn how to properly model and flat pattern a square to round in f360 environment.

Here is some of the process

This is a typical flow by hand to produce a irregular type square to round.




Here it a few shots from the sketchup8 method



Now Fusion 360






Add allowances



Zero clean up off the table besides wiping off the water.
(.021)26ga galv 40amp 300ipm kerf .018
I am running a powermax 85 with finecut consumables I am as close to book as a can go


one inch notch for the slip and drives.

that hole is .06 in diameter



I am going to find my other set of rollers and do a different seam on the collar for the next one.

It fit very well for the first HVAC fitting off my Langmuir.

Cutting video 26 ga galv HVAC

I am going to grind away at this workflow till I get to polished.

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Thanks for sharing. Love all the detail you provided.

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