Chamfer fusion 360tutorial

Just for clarity I will be using the ASME Y14.5 standard (section 1.8.16) for chamfer dimensioning. That is, where the called out dimension is the opposite or adjacent side of a triangular chamfer, and not the hypotenuse.

This is where this method really shines, when we use our new form tool and create a 2D contour or Trace or pocket for chamfering we don’t need to apply any hacky work arounds in the “stock to leave” box or play with the contour height selection, or even need to make a template tool path, it just works! Select the 2D or 3D contour that requires a chamfer and you’re good.

Fusion 360 chamfertoolpath

On the same plane, create a new sketch and draw out HALF of the tool’s profile with the sketch origin being on the tool’s centerline.

Recently I found myself with the issue of needing to chamfer a part feature, but I couldn’t reach it with the traditional chamfering approach.

Whatever tool you’re using you need to bring it into Fusion360. Iscar makes it very easy as they have files package for every tool. If your tool of choice doesn’t have a 2D file, you can always draw it from scratch using provided dimensions. You can also setup a parametric template to use in the future if you’re so inclined.

Fusion 360 chamfernot working

Chamfer fusion 360download

Now here is the clever bit, to get Fusion to recognize the tool as a back chamfer tool we need to define the tool compensation point. Normally, this point is the revolves centerline at the lowest Z height. But we don’t want that so we need to tell Fusion where we want to compensate the tool point.

Fusion 360 chamferEmpty toolpath

First challenge is finding a backside chamfering tool which fits your part and has adequate reach. I am using Iscar’s MultiMaster upper and bottom chamfering tools (MM HDF100-090-2T05). You can use whatever tool you want, but check the following:

When we create the form tool we select the tool profile we created, select the axis of rotation (arrow points down), and most importantly select the compensation point we just created. And that’s it! The new form tool is in your tool library.

Some caveats however, if your tool diameter is very close to the minimum cutting radius be sure to use feed optimization option. If your tool diameter is also close to the minimum cutting radius, avoid steep Z height changes along 3D contours. You get a “step” in the tool path and may cause gouging. Additionally, if the solid model has the chamfers modeled in, you’ll need to create another form tool with the compensation point at the lower cutting edge.

So I dug into how to get Fusion360 to make back (backside, bottom chamfering, etc.) chamfers. And unfortunately, it’s not simple or straight forward. And in all honesty, the information seems to be stagnant out there. The best resource for Fusion 360 I’ve found has been NYC CNC, great guys and very informative content. They have a great, although dated, video ( https://youtu.be/HsBR2_6h4mM ) of how they have tackled the problem of back side chamfering if you want to see where I am starting from.

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