Asymmetric tapered hole

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earthcare
Posts: 26
Joined: Tue May 31, 2016 7:46 am
Location: Australia

Asymmetric tapered hole

Postby earthcare » Wed May 16, 2018 6:36 am

Hi
I have a real challenge: I cam't even work out where to start.

I have a flat surface which is at 45 degrees to the Y and X axes. In that surface I need to form a tapered hole, but one that it not circular. A 2D drawing of the hole is attached.

I presume I can create the item, and position/align it to the existing drawing, then subtract one from the other, but:
  • I have absolutely no idea how to draw this item!
  • I have never positioned something that is at 45 degrees to one the standard axes.
I could probably work out the second (eventually) but the first baffles me completely.

Can anyone help?
Attachments
Screenshot from 2018-05-16 16-27-50.png
Screenshot from 2018-05-16 16-27-50.png (1.26 KiB) Viewed 499 times
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microelly2
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Re: Asymmetric tapered hole

Postby microelly2 » Wed May 16, 2018 7:23 am

for your parts you have a placement property.
you can change the direction by the rotation attribute
if you switch to euler angle representation of the rotation it is easy to rotate along the main axes.
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meme2704
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Re: Asymmetric tapered hole

Postby meme2704 » Wed May 16, 2018 7:30 am

Do you vant something like that?
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lanticulaire.FCStd
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lenticulaire.JPG
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HarryGeier
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Re: Asymmetric tapered hole

Postby HarryGeier » Wed May 16, 2018 1:10 pm

You can do that easilyy with a loft in Part Design WB
2018-05-16 15_09_26-FreeCAD.png
2018-05-16 15_09_26-FreeCAD.png (44.4 KiB) Viewed 465 times
If you want to sketch on slanted planes.. datum planes are the magic word
See in this video:

https://www.youtube.com/watch?v=dw9EDlYfE14&t=74s
Kaum macht man´s richtig , gehts´s
My Video Tutorials on Youtube: https://www.youtube.com/channel/UCoe3B ... p8Q/videos
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earthcare
Posts: 26
Joined: Tue May 31, 2016 7:46 am
Location: Australia

Re: Asymmetric tapered hole

Postby earthcare » Wed May 16, 2018 9:54 pm

microelly2, thanks for the tip.

meme2704, that's almost it, thank you. The circle at the bottom of the hole is centred in the hole, rather than off-set, though, and the hole is perpendicular to a face that is at 45 degrees to the main axes of the drawing - sorry if I misled you in that regard.

HarryGeier, I'll have a look at datum planes, thanks.