[SOLVED] How to make a hole in a tapered, extruded object?

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SteveDee
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[SOLVED] How to make a hole in a tapered, extruded object?

Post by SteveDee »

I'm very new to FreeCAD, so this may be a silly question.

I can create a 3D object in Part Design workbench using Pad and then put a hole in it via the "Create a hole..." icon.

However, I want to make a tapered object, which I can do with Extrude in the Part workbench, but then I can't see any way of adding a hole.

If I use Sketcher to draw a circle, then return to Part Design to access the "hole" icon, I typically end up with a message, something like:-
Cannot use selected object. Selected object must belong to the active body

Can someone point to a tutorial that may help me? If not, maybe outline the main steps/workbenches/tools?

System details;
OS: Peppermint Ten (LXDE/Peppermint)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.
Build type: Release
Branch: unknown
Hash: 7a9aa7edf2f44e3eb6a8e3e61c753368496b1399
Python version: 3.6.9
Qt version: 5.9.5
Coin version: 4.0.0a
OCC version: 7.5.2
Locale: English/UnitedKingdom (en_GB)
Last edited by SteveDee on Sun Jul 25, 2021 9:47 am, edited 1 time in total.
heda
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Re: How to make a hole in a tapered, extruded object?

Post by heda »

hi and welcome to the forum.

the recommendation for new users is to avoid mixing part design wb and part wb, it is possible to to use them together,
but one first has to learn how and under what circumstances it is possible to use them together.

if you follow this tutorial document you will learn how to make a hole with part wb.

btw, tapered can mean a lot of things, there is also PartDesign_Draft
GeneFC
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Re: How to make a hole in a tapered, extruded object?

Post by GeneFC »

Here is an example made purely in Part Design WB.

Tapered.PNG
Tapered.PNG (33.79 KiB) Viewed 1517 times
Tapered Hole.FCStd
(18.63 KiB) Downloaded 25 times

This uses both additive and subtractive lofts.


OS: Windows 7 SP 1 (6.1)
Word size of FreeCAD: 64-bit
Version: 0.20.25220 (Git)
Build type: Release
Branch: master
Hash: 46282db7c8c65d1205a4cd03499d4beadb1573c6
Python version: 3.8.10
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.2
Locale: English/United States (en_US)


Gene
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papyblaise
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Re: How to make a hole in a tapered, extruded object?

Post by papyblaise »

for me "tapered" means to make a nut
make an object with PartDesign or PartWb
make a "tap" with the Fastener workshop
Boolean subtraction, unfortunately only PartWb allows it in this configuration
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Shalmeneser
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Re: How to make a hole in a tapered, extruded object?

Post by Shalmeneser »

PartDesign wb with PartDesign_Boolean

You should try 0.20 : https://github.com/FreeCAD/FreeCAD-Bund ... kly-builds (Holes with thread)
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GeneFC
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Re: How to make a hole in a tapered, extruded object?

Post by GeneFC »

papyblaise wrote: Sat Jul 17, 2021 4:25 pm for me "tapered" means to make a nut
Sorry, unrelated in English. You may mean "tapped", which is not the same as "tapered".

Gene
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Shalmeneser
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Re: How to make a hole in a tapered, extruded object?

Post by Shalmeneser »

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Tapered Hole _Shalm.FCStd
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TheMarkster
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Re: How to make a hole in a tapered, extruded object?

Post by TheMarkster »

The error means the sketch needs to be inside the body in order to use it part design. You can drag and drop it into the body. The body also needs to be active, which can be done via right click context menu.

If you want to stay in Part workbench you can extrude the hole, and then use the boolean cut operation to cut the hole from the other part.
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papyblaise
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Re: How to make a hole in a tapered, extruded object?

Post by papyblaise »

Sorry, unrelated in English. You may mean "tapped", which is not the same as "tapered".
how do you say "a conical threaded tap" in Yenkee's
""tapered tapped tap "" :?: it's a lot of tapettes :!: (sorry french's jock) :lol:

seriously, what do you call the cone nut in picture
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ecrou conique.PNG
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SteveDee
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Re: How to make a hole in a tapered, extruded object?

Post by SteveDee »

Many thanks to all for making me feel so welcome on my first post.

Sorry to have confused you with the "taper/tapered/tapped/tap/tapettes" trap.

Yes, taper has several meanings even outside the world of FreeCAD; decreasing width or diameter of an object, wax coated wick used to light candles, ugly looking animal that lives in sou...Oh wait, that's a Tapir.

I've read everything in this thread including heda's excellent tutorial. Great stuff!

Seems to me that the simplest method is probably to run a Boolean Operation with a cylinder

ConeHead.png
ConeHead.png (134.47 KiB) Viewed 1329 times

I'm off now to add a counter-bore to this object, so there's no doubt that "I'll be back!"

Many thanks once again.
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