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## Need help with chamfering grooves on a mill

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Message 1 of 6
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## Need help with chamfering grooves on a mill

tried a few different ways. cannot even get the regular(bottom) chamfer to work let alone trying the topside chamfer.

anyone have tips? attached is the f360 file.

5 REPLIES 5
Message 2 of 6

Hi, we use these tools regularly.  I use 2d contour and fiddle with side and depth allowance until it looks right.  Then I save a template for this tool for ease of use the next time.

Message 3 of 6

Folks that are much smarter than I have done the brain-work and come up with some nice expressions that can handle this with no fiddling whatsoever. Initially, it was one formula, but I didn't like that it put the tip of the tool right on the edge of the selection. As such, I've tweaked it a bit and now there's one for "topside" and "bottom side".

I've attached the template (zip folder) and the file here.

Here's the expression(s) that go in the radial and axial Stock to Leave:

(tool_diameter-tool_tipDiameter)/2-chamferWidth-2*(chamferTipOffset/Math.tan((90-tool_taperAngle) * Math.PI/180))-.005in

Axial:

-((tool_diameter-tool_tipDiameter)/2*Math.tan((90-tool_taperAngle) * Math.PI/180))+(chamferWidth*Math.tan((90-tool_taperAngle) * Math.PI/180))-.005in

The above is for deburring the backside of a part and it gives you a .005" offset to tool centerline. You need to set your Chamfer Width and Chamfer Offset to zero:

The "Stock to Leave" portions are filled in via the expression.

Message 4 of 6

**** dude!!!  Thank you so much!  I am saving these equations for future use for sure, awesome!!

Message 5 of 6

Yep, they're quite handy! And, they do adjust for tool angles, even though it's most common to use a 90 degree Double-Angle tool