Aligning boltholes originated from non parallel faces in different bodies

[jrortizbjj]

Hello, I have two bodies that will be held together by four bolts, the holes in the bottom body are threaded, the holes on the top body must be counterbored in order for the bolts to pass thorugh the upper body and thread into the bottom body, the counterbore logically to house the boltheads; the problem I encounter is that since the top face of the body on the top is not perfectly parallel to the top face of the bottom body (it has an ergonomically or curved shaped surface) I cannot find a way to match the orientation of the holes on the top body to the holes in the bottom body, and they must match because the bolts will secure one to the other, any tips, I just started using this software a couple of weeks ago, not an engineer, just an inventor.

[seth.madore]

Could you perhaps share a screenshot that would give us a better visual understanding of what you are running into for an issue? Of course, the actual file would be much more preferred, but I understand if you're hesitant to share your ideas with the public

[TheCADWhisperer]

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

If your design is proprietary then simply make up a dummy file that illustrates the issue.

I can tell you that my solution will probably be a Revolve-Cut of a couple of rectangles representing the clearance hole and the counterbore.

[jhackney1972 · Accepted solution]

You have not supplied your model so I created a "guess" as to what you may have.  Take a look at the Screencast for the process.  The model I used in the Screencast is attached.

[jrortizbjj]

Thanks, just watched the screencast and I believe your solution is just what I needed, I will play with some terms and processes I am still not familiar with due to my noviceness but I am sure it will work!

[jrortizbjj]

Hello, thanks, here it goes

[jrortizbjj]

Thanks, here it goes

[jhackney1972]

You have a M4.5 thread in the bottom half and Fusion 360 does not offer a counterbore for a 4.5mm socket head cap screw so I used a M5 counterbore.  You might want to select a thread for the lower half that you can find a counterbore for instead of having to create a custom one yourself.  Your modified model is attached.

[jrortizbjj]

Thanks, here is the final result, your solution was great!!!