Multi-plane material removal

Hello

I want to do a material removal in several planes, on a non-flat surface

Here are screenshots of the play:


Here's an idea of how I'd like it to look. We can see that there is a piece missing to remove at the level of the half-moon. In addition, I did it in a lot of functions which causes problems

I tested several ways:

  • Several material removals
  • Experiment with surface by extending surfaces
  • Make several bodies or by combining them

I can possibly donate the piece if needed

Thank you for your help

Hello
Yes, it will be easier to understand when opening the room.

Hello

Here is the piece below. I tinkered with the material removal function 55,56,57,58. But hey, it doesn't satisfy me, both on the process and on the rendering

01 SURFACE MODIFIED CHASSIS. SLDPRT (11.7 MB)

Too bad, it doesn't open in the 2019 version, any more info on the final result for my colleagues?

Thank you for your feedback.

I have just put in step format the file with the final result I would like to obtain (except for 2-3 details because we can see that there is a miss, especially with the middle part. the material removal is not " flat " with the surface) and the part without the functions.

In addition, I also have a clearance on the other side of the room to do. You can see that it's catastrophic, but I think the same process is used for both sides. I have to make a clearance on the side and on the front of the room

01 SURFACE MODIFICATION CHASSIS-rendu_final. STEP (20.4 MB)
01 SURFACE MODIFIED CHASSIS-sans_degagement. STEP (20.4 MB)

Hello.

Why not start by making a shell function and then adjust to your needs later?

2 Likes

Hello
I admit that the model is complex. Is it really necessary to follow all these guide curves. There are 13 of them.
By simplifying the model, material removals will be easier to do.
Besides, I don't see what will happen if you continue without simplifying. It will be a hassle to clean all the approximate connections.
The previous proposal to make a shell is very good provided that the outer surface is simpler. Otherwise it will probably fail.
The outer profile curves of the smoothing feature are obtained from the arcs and lines. The same thing should be done on the intermediate profile curves. Have the same number of inflection points for all profile curves.
If you can do this, there will be little or no need for guide curves. The outer side will be more relaxed.
Then, to avoid having facets in the solid area, you will have to use the face displacement function.

image

2 Likes

I don't use the shell function but I make the "shell" in surface but I need to make a hole in this shell in several shapes

Yes, the model is really complex...
It's true that there are a lot of guide coube and yes we have to follow them. The goal is to make the shape of a hand

Unless I misunderstood, I already make a shell with the surface, knowing that there is nothing inside the room

I didn't really understand the curved part of the outer profile with the inflection points...

I think we misunderstood each other.

You have made your outer form, which you call "shell"
On the other hand, with Solidworks, the shell function is to allow you to follow your external shape by leaving a constant thickness ... Which is similar to what you want to do I have the impression.
Where I agree @soring is that this function is very annoying with the junctions between two planes so that there is a complex shape such as rounding/chamfering. To see if it passes or not

2 Likes

I'll come back with an example a little later.
The hull function is different. We create a solid, solid, example cube. Then we click on the shell function, we fill in the thickness of the walls, then we point to the face(s) to be removed and we validate.
In your project there is surface smoothing + thickening. Big difference.

1 Like

Good evening, here is a little snatch test, to illustrate what my comrades have said.

1-Make a volume
2-Project the curves to delimit the areas to be removed (personally I didn't think it was going to work :laughing:)
3-Then perform the hull function by selecting the areas to be removed.

Attached is my SW2019 SP05 test file

This should give you a lead to explore for your case. and can be simplified modeling.
I remind you that you can give a different thickness in the hull function if necessary. (thicker at the handle for example)

Good night
Projection test + shell. SLDPRT (107.4 KB)

2 Likes

I only dwell on the smoothing function and the hollowing out of the walls.
By simplifying the profile curves by smoothing (without loss of detail) the number of guide curves can be reduced. Essential for healthy geometry.
Your surface smoothing

the same surface after smoothing the 4 curves profile. I left 2 guide curves. Not sure that they are useful. The reflections on the faces are more homogeneous and the tangent edges have disappeared.

To smooth curves, look for icon Screenshot_10 in the spline tool menu. Fine-tuning is possible.

Then, to no longer have this kind of defect, it would have been necessary to make the internal vertical wall after the recesses, otherwise the face offset method also works.

Screenshot_9

Use the Winding function as an alternative for recesses. Not just extrusion. This allows you to obtain clean openings perpendicular to the support face.

Extrusion

Winding
Screenshot_13

Here are two little tips to simplify without big changes in method. of construction.

4 Likes

Thank you very much for the example, I'll dig into this idea and do some tests with my case

Thank you for the tips that will be very useful to simplify the design.

Indeed the windings seem to work better than the extrusions and give a better final rendering

I hadn't thought of doing the vertical wall after the recesses, but it's more coherent so as not to have this kind of problems

Do you have the SW file of the tests performed on the part?

… not kept sorry. And anyway you will have to correct the other functions behind which will turn red. So open a copy at the same time, extend the display to two screens and repair each function while comparing with the original.

1 Like

no worries I understand, it was mainly to see the functions, I suspect that all the functions will be in red afterwards

In any case, I'm testing your solutions and I'll keep you informed of how I finally made the part