topic Re: 3D modelling in AutoCAD Forum

3D modelling

Yashasvi23481 — Thu, 31 Aug 2023 08:11:01 GMT

Hi All,

Its first time i hv come across company who still dealing in AutoCAD for 3d modelling.

I hv learnt few things but i want to a quicker way to flip the folds. I hv text/logo engraved on longer side of c like folded plate. When i extruded logo it turned out to be on wrong face and quicker way will be to flip the top n bottom folds to get right.

In 3D modelling like inventor, its just edit feature and change direction of fold to get it right. How to do in AutoCAD ? Is slicing and presspull and redoing text and extrude and lastly subtract extrusion from solid only way ? Any shortcut to just flip folds outward than inward ??

Please help if you can...ASAP..

Regards,

Yash

Re: 3D modelling

AVCPlugins — Thu, 31 Aug 2023 08:22:28 GMT

It is not at all clear what the folds are. But any faces of a solid are easily rearranged in space and are easy to remove (unless, of course, AutoCAD figures out how to patch up the remaining hole). For example, to remove an extra hole - just select its cylindrical surface (hold CTRL to select sub-objects) and press Del.

Tips for beginners in 3D here

Re: 3D modelling

Yashasvi23481 — Thu, 31 Aug 2023 08:31:07 GMT

Hi,

Thanks. I will draw up a rough sketch of problem i m facing. That will
clear most doubts. Engraved is text n has round globe around. What are the
benefits of doing 3D in AutoCAD wen you hv Inventor and Solidworks ?

Thanks in Advance.

Regards,
Yash

Re: 3D modelling

AVCPlugins — Thu, 31 Aug 2023 09:42:29 GMT

AutoCAD's advantage is fast, direct modeling. It is not required to think over and create a system of parameters. This allows you to very quickly design products from simple parts (like furniture). For modeling, you can draw a box and cut off the details (described in detail here). To modify such products, it is enough to stretch or compress the entire assembly with one command _Move thanks to the ability to move the surfaces of the solids.
For more complex products, parametric modeling may be the best choice. But much more expensive programs and expensive specialists will be required. This is another reason to choose DWG programs (it's not just AutoCAD).

Re: 3D modelling

Yashasvi23481 — Thu, 31 Aug 2023 09:08:07 GMT

Hi AVC,

Thanks for explaining. However assembling and detailing in AutoCAD is
troublesome. Place model n contrain in 3 views n then create flat shot.

Anyways, attaching image of problem in red and suggested solution in black.
Please suggest way to flip parts in 3d model. Thats quickest way to solve.
Here is wat i hv been doing, isolate, rotate, delete engraving by slicing
and recreate same surface using presspull n re do logo n go thru extrusion,
solid subtract n checking which surface in isoview...

I hv to do flat pattern and drawings too and update new model constraint by
ending isolation. Easily 10 min job. Inventor can do by edit feature n
change direction of bend. If you can show quick way to achieve through flip
or folding bends by 90deg, will be helpful.

Regards,
Yash

Re: 3D modelling

AVCPlugins — Thu, 31 Aug 2023 09:50:36 GMT

There is no need to create flat shots. ModelDoc views are updated automatically when changes are made in the model, just like in Inventor.
However, you posted a comment without a picture.

Re: 3D modelling

Yashasvi23481 — Thu, 31 Aug 2023 10:08:07 GMT

Hi,

I attached via email reply. Looks like it updates/attaches through forum
only. Will update tomorrow via forum.

Regards,
Yash

Re: 3D modelling

paullimapa — Thu, 31 Aug 2023 10:24:42 GMT

Go through this very simple video tutorial on creating a 3dmodel in AutoCAD and then setting up flatten views that automatically update in Layout

https://m.youtube.com/watch?v=41AUQdWZ9r4

Re: 3D modelling

Yashasvi23481 — Thu, 31 Aug 2023 12:49:56 GMT

Hi AVC and others,

Attached is problem and required solution show me simplest way to achieve whats in black. For your convenience, i hv done in diff colors.

Many Thanks and regards,

Yash

Re: 3D modelling

AVCPlugins — Thu, 31 Aug 2023 13:22:31 GMT

I wouldn’t just cut off all the protruding parts (_slice) from the part, divide them into separate solids (if they end up glued into a multisolid _solidedit _body _separate) and then mirror the necessary parts in the right directions as you need. Then you can combine it back into 1 solid (_union).
But perhaps moving the solid faces will work if you take the two faces at the ends of the top and bottom protrusions and move them through the part in the opposite direction.

Re: 3D modelling

Yashasvi23481 — Thu, 31 Aug 2023 20:14:07 GMT

Hi AVC,

Will mirror work or it will reverse direction of text ? Is there a way or
command to change ref surface of sketch and then do extrude in opp
direction to achieve same result ?

Trouble is have to modify this on 3 sides of plate. I must hv used 2d frame
to do extrusion in first place. Shud hv used solid with edges as visibility
style.

Let me know if mirror will help or reverse to text/logo direction ?

Will be at work in 1 hr.

Regards,
Yash

Re: 3D modelling

Patchy — Fri, 01 Sep 2023 02:13:01 GMT

Will mirror work or it will reverse direction of text ?

It will reverse the text.

Slice the flanges off (the Fold you called it), then reattach to the other side, is that what you're asking?

Re: 3D modelling

AutoMarcus — Fri, 01 Sep 2023 01:24:31 GMT

What are the
benefits of doing 3D in AutoCAD wen you hv Inventor and Solidworks ?

gets out popcorn

Re: 3D modelling

Patchy — Fri, 01 Sep 2023 02:13:41 GMT

@AutoMarcus

What are the
benefits of doing 3D in AutoCAD wen you hv Inventor and Solidworks ?

gets out popcorn

Well, he said this company only use Autocad.

Its first time i hv come across company who still dealing in AutoCAD for 3d modelling

Re: 3D modelling

AVCPlugins — Fri, 01 Sep 2023 05:45:09 GMT

It is not difficult to guess that the _Mirror command makes a mirror copy of the object, so the text will not be readable. Therefore, in such cases, you need to use the _Rotate 180 command. To select the correct axis of rotation in the center of the part, I would make several additional constructions, auxiliary lines. Get used to the fact that in AutoCAD, additional lines are often needed to simply set the desired point. Perhaps, in your case, snapping to the center of the lower and upper surfaces of the vertical wall of your part will work, and then additional constructions are not needed.
In general, direct modeling without a "building tree" implies a completely different logic of work. You don't need to look in the "construction tree" for the moment when you made a mistake in order to make a "flip". No, forget what you did with the item before. Look at what you got and think about how easier it is to transform it into the form that you now need. In many cases, this is even easier than iterating through multiple parameters and builds throughout history.

Re: 3D modelling

AVCPlugins — Fri, 01 Sep 2023 06:13:35 GMT

According to my personal feelings, over the past 25 years, the number of companies using pure AutoCAD 3D has not only not decreased, but perhaps even increased (taking into account all DWG-programs). New programs (mainly more complex and expensive) appear all the time, but not all engineers are ready to constantly retrain and overpay. Of course, there is no point in drawing a tractor or an airplane in AutoCAD. I don’t understand why in all the lessons on YouTube they draw some kind of crankshaft in AutoCAD. This is not a task for AutoCAD. AutoCAD and its many clones are ideal for flat sheet products such as furniture, steel ladders, wooden partitions, tube or beam frames, exhibition stand structures, stage design, lightboxes and other outdoor and indoor advertising. Where there are no complex surfaces and parts with hundreds of edges, where there are no series of similar products and no parameterization is needed. Especially where many products from different areas are combined and standard programs for one area become inoperative. For example, a curved reception table for an exhibition stand with a built-in lightbox and beer dispenser 🙂 it seems to be furniture, but furniture programs can’t handle it (although they cost a hell of a lot of money). All the same can be modeled in universal parametric programs, in the same Inventor. But you will have to spend more time and money.

However, AutoCAD alone is almost impossible to get by. In any case, you will need at least plugins, and probably some kind of CAM program for the CNC.