Loft Problem [SOLVED]

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Laurie Hartley
Posts: 522
Joined: Mon Feb 27, 2017 5:33 am
Location: Australia

Loft Problem [SOLVED]

Post by Laurie Hartley »

I would appreciate some help as to how to create a swaged end on a tube. I have attached an image of the object I am trying to create in which I have indicated the effect I am trying to achieve. My objective is to create a tube flattened at both ends which can then be easily welded at right angles to another tube of the same circumference.

My planned workflow was going to be:
Create one quarter of the swaged end by lofting between two sketches - see attached file
Create a 4 part polar array of the loft and create a fusion.
Using the A2P workbench create the complete part from a length of tube plus two of the swaged ends and create another fusion.

My questions are:_
Can the loft be created from the two sketches I have produced in the attached file?
If so what are the steps required (I have watched a couple of YouTube videos on how to do this)
If not how should I go about my task.

All help and feedback will be appreciated.

Code: Select all

[code]
OS: Debian GNU/Linux 10 (buster) (XFCE/xfce)
Word size of FreeCAD: 64-bit
Version: 0.21.0.32532 (Git) AppImage
Build type: Release
Branch: master
Hash: 20e44eba50e1365b9e7bb9c5c244afe96a627a28
Python 3.10.10, Qt 5.15.8, Coin 4.0.0, Vtk 9.1.0, OCC 7.6.3
Locale: English/Australia (en_AU)
Installed mods: 
  * Help 1.0.3
  * Defeaturing 1.2.0
  * PieMenu
  * A2plus 0.4.60i
  * QuickMeasure 2022.10.28
  * Assembly4 0.12.5
  * Curves 0.6.6
  * Pyramids-and-Polyhedrons
  * CubeMenu
  * frame 0.1.0
  * Plot 2022.4.17
  * sheetmetal 0.2.61
  * fasteners 0.4.54
  * Manipulator 1.5.0
  * BOLTSFC
  * CfdOF 1.21.4
  * lattice2 1.0.0
  * dodo 1.0.0
  * Cfd
  * ExplodedAssembly
  * DynamicData 2.46.0
[/code]
Attachments
Stillage_Transom_End.FCStd
(16.35 KiB) Downloaded 27 times
Stillage.png
Stillage.png (120.43 KiB) Viewed 868 times
Last edited by Laurie Hartley on Thu Mar 30, 2023 9:58 am, edited 1 time in total.
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thomas-neemann
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Re: Loft Problem

Post by thomas-neemann »

Laurie Hartley wrote: Thu Mar 30, 2023 6:07 am ....
if that's a solution for you, i can make a video for you

Bildschirmfoto_2023-03-30_08-57-10.png
Bildschirmfoto_2023-03-30_08-57-10.png (91.2 KiB) Viewed 834 times
854.FCStd
(17.42 KiB) Downloaded 28 times
Gruß Dipl.-Ing. (FH) Thomas Neemann

https://www.youtube.com/@thomasneemann5 ... ry=freecad
Bance
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Re: Loft Problem

Post by Bance »

The quadrant needs to be split so as to have the same number of edges as the squashed sketch. Use the split tool.....
Attachments
Stillage_Transom_End_Bance.FCStd
(75.14 KiB) Downloaded 30 times
swage.png
swage.png (33.65 KiB) Viewed 817 times
Laurie Hartley
Posts: 522
Joined: Mon Feb 27, 2017 5:33 am
Location: Australia

Re: Loft Problem

Post by Laurie Hartley »

thomas-neemann wrote: Thu Mar 30, 2023 6:57 am
Laurie Hartley wrote: Thu Mar 30, 2023 6:07 am ....
if that's a solution for you, i can make a video for you
Thanks for your response

Actually Bance below has produced exactly what I was attempting.. your videos are a terrific source of help.
Perhaps a collaboration between you and Bance using his model. Lofting is something new to me so I have to learn about this “split tool”
Laurie Hartley
Posts: 522
Joined: Mon Feb 27, 2017 5:33 am
Location: Australia

Re: Loft Problem

Post by Laurie Hartley »

Bance wrote: Thu Mar 30, 2023 7:21 am The quadrant needs to be split so as to have the same number of edges as the squashed sketch. Use the split tool.....
Thank you very much Bance that is exactly what I am hoping to produce.
I will have a look at your file and investigate about this “splitting” business :D
Bance
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Re: Loft Problem

Post by Bance »

Laurie Hartley
Posts: 522
Joined: Mon Feb 27, 2017 5:33 am
Location: Australia

Re: Loft Problem

Post by Laurie Hartley »

Bance wrote: Thu Mar 30, 2023 8:09 am Image

https://wiki.freecad.org/Sketcher_Split
Well I have gained an understanding of the split tool and was able to loft between my two sketches - thank you Bance.
I am struggling a bit with the multi transform tool - something that is also new to me.
I suppose you could say I am 75% there - see my latest file attached.
I used the mirror tool to create two sections of the loft above the horizontal axis but I can't figure out how to get more than one loft below the horizontal axis.
Your further advice would be greatly appreciated.
Attachments
Stillage_Transom_End_LHv2.FCStd
(84.08 KiB) Downloaded 26 times
Bance
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Re: Loft Problem [SOLVED]

Post by Bance »

It's in my file, you must use the multitransform tool since it is not possible to pattern a pattern otherwise.

Use two mirror operations with different axis of symmetry.

Double click on the multitransform in the treeview to open the edit dialogue.
Attachments
Stillage_Transom_End_LHv2Bance.FCStd
(57.87 KiB) Downloaded 25 times
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papyblaise
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Re: Loft Problem [SOLVED]

Post by papyblaise »

I took your file to modify the flow and especially the shape of the duckbill using only arcs of circles to allow the subsequent welding radius
Attachments
caisse.FCStd
(406.38 KiB) Downloaded 28 times
caisse.JPG
caisse.JPG (26.43 KiB) Viewed 539 times
Laurie Hartley
Posts: 522
Joined: Mon Feb 27, 2017 5:33 am
Location: Australia

Re: Loft Problem [SOLVED]

Post by Laurie Hartley »

Bance wrote: Fri Mar 31, 2023 7:01 am It's in my file, you must use the multitransform tool since it is not possible to pattern a pattern otherwise.

Use two mirror operations with different axis of symmetry.

Double click on the multitransform in the treeview to open the edit dialogue.
Thanks once again Bance - I will have another attempt tomorrow.
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