emboss a complex shape in a another shape

[chrisprols]

Hello community,

I have spent quite a few hours searching on youtube, google and the forum ... but I can't find. 

If the solution is simple or already exist, please point me in the right direction.

Say I have a shape A, which can be complex. Meaning it has convex forms as well as concave forms on it. Or it can be complex because it comes from a 3d scan. etc.

Then shape B, for now is just a simple extrude. So it's like a rectangular block.

I want to create the negative space of sliding shape A into shape B.

I found a few ideas on how to describe what I have in mind :

- imagine shape B is sand. the result is like pushing shape A into the sand. It will have the full 3d shape of the shape A and as well the "side walls" of the widest part of the shape

- imagine the sun shining into shape A. Then the shape A and the shadows would join into a new body/component. That creates shape C. I would then substract shape C from shape B.

- imagine the top surface of shape B. The exercice is then to extrude that face up to any level in shape A (could be middle, two thirds or the top most of shape A), but the extrude would stop at all place, at the first surface encountered from shape A.

I'm sorry if my request is not clear.

Imagine shape A could be a weird shape glass, a screw at any angle, a person's face, a model of a spaceship .... long story short : I want to create a model that I can 3d print and where I can place the object in a perfectly fit "slot".

EDIT : adding a video to show what I mean

EDIT 2 : it seems the functionnality that would work exist in inventor : solid sweep. but I'm looking for a workaround in Fusion.

[g-andresen]

Hi,

Please provide pictures with explanations so that we can get an idea.

günther

[chrisprols]

This is the idea of a shape that would represent the complexity.

The idea would be to push this on in the cubic below.

Then the cut would be the bottom surface of the cylinder, the bottom surface of the shere and straight surfaces "up" from whereever is the widest part of the shape.

.... as it it had been pushed in sand and then removed delicately.

In a way, this shape is complex enough, but as I might have different and other "complexities"

[jhackney1972]

Please attach the Complex model, or both, to a reply post.  If you do not know how to attach your Fusion 360 model follow these easy steps. Open the model in Fusion 360, select the File menu, then Export and save as a F3D or F3Z file to your hard drive. Then use the Attachments section, of a forum post, to attach it.

[jhackney1972]

If the Animated GIF is similar to what you want and you attach your "complex" shape, I can show you how I did it.

[chrisprols]

Hey John !

This is one of the attempts I made. Extrude to the object, or try the emboss function.

However, to use again my image of pushing an object into sand, those functions do not work.

You see, because the shape has concave and convex shapes, the extrude goes all around them and there are parts I do not want.

For a simple shape, I could do an intermediate construction place, intersect and do another extrude, that is easy enough.

In the shape I showed a screenshot, I would need to do this 3 times: 1 for the sphere, 1 for the cylinder, and a last 1 for the shoulders of the rectangular shape.

However, for a more complex shape, an organic shape, it would be very complicated and I would not necessarily catch all the planes where the shape is at it's widest.

[jhackney1972]

I do not see your model, please attach it.

[chrisprols]

now attached to this message.

I will try to make manually an example of the negative space I want to create.

of course, the goal would be to create it automatically, or at least independently of user judgment.

[jhackney1972]

Here is your "mold" of your body.  I went ahead and added a Concave surface to show it works just fine.  Only one command is use to do this, Combine.  Model is attached.

[chrisprols]

hi again.

please see attached the shape I am aiming for in the "foam" body.

I manually created 2 cylinder and did a cut that included the original piece and the 2 manual cylinders.

So if I were to have the "foam" part 3d printed, of CNC'ed out of a block of foam, I would be able to put and remove the "complex shape" in and out ... hand having it nicely supported when it is in the foam.

[jhackney1972]

In this example, you are basically creating a three piece mold.  The main body is one, and the squarish and cylinder are the other two.  You put all the three pieces together, pin them, and fill it with your material.  When set, you can pull the pins and remove the two inner pieces and withdraw your finished part.

The method you are doing is is basically like I would do it with a little bit of difference in method.  The main difference I would make it to create all as components so you can add Slider joints later to make the model easy to animate to illustrate you process.

I will not supply a model unless you need to see the use of components instead of bodies.  Good luck.

[chrisprols]

ok. so maybe I did not express my request correctly. actually probably.

My question is instead of having to manually create those aid parts to create a negative space so the part can slide in and out, how do I do that using Fusion functionalities?

The part I would get could be a screwdriver, a circular saw, a camera, etc. I want to create the negative space for any of those shapes without having to create those aids manually.

Creating an animation is not the purpose. I would 3d print this holder (=piece with the negative shape) and use it as a stand.

I want to create something like the "shadow foam". But instead of each of the pockets (=negative spaces) having a flat bottom, I want to have the exact shape of each piece.

Would that be doable using the slider joint ? or is this just to show the concept in an animation ?

[davebYYPCU]

Fusion does not have, Sweep > Cut - using a body on the path.

What you are doing is all there is.

Apparently this function is available in the Inventor software.

Might help….

[chrisprols]

ok, so I guess what I'm really looking for is the solid sweep (then use as "cut") in Autodesk Inventor.

.... and it does not exist in Fusion 😞

I guess I'll continue looking for a workaround, for now.

[davebYYPCU]

The shadow cut it normally a body projection, and Combine cut for the floor.  More complicated with undercuts.

The example body earlier, 

Combine cut it from the cube, John’s first step, 

then extrude the (projected sphere) semi circle to give motion clearance to the sphere.

2 steps for that one.

Might help….

[jhackney1972]

Fusion 360 can use a Body to do a Sweep but the body must be a Surface Body.  The video will explain and show the process.  This process is especially good for edge forming as outlined in this Blog Article and Video.

I am still wondering how this will fit into what you want to accomplish.

[TrippyLighting]

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@jhackney1972 wrote:

Fusion 360 can use a Body to do a Sweep but the body must be a Surface Body.  

I am still wondering how this will fit into what you want to accomplish.

---

A solid sweep just like in Autodesk Inventor. Instead of sweeping a surface you'll sweep a solid body.

This modeling method is equivalent to EDM machining. You can make a complex shaped electrode and "simply" sink it into the material.

[Warmingup1953]

Am I oversimplifying? Will you 3D print?

[davebYYPCU]

His solution is in Message 10, asking if he has missed a more efficient way to get there?

Nope.

[chrisprols]

Hello !

I had not seen the multiple repplies. Thanks a lof for trying to help.

Indeed, I was so hopefull for the surface sweep ... but that was me not knowing the surface would be 2D and not the outside shell of my 3d object.

My need will be most probably 3d printed. I used to have a CNC in which case I would have done some 3D machining in foam .... but I don't have my workshop anymore .... so it will be a 3D print.

As mentionned, I want to make the equivalent of shadow foam for some objects. But instead of having a flat bottom, I want to have the 3D shape of the object that will be "sunk in".

I have also created an animation (learned last night) and attached in the original message.

I guess my need is a merge of an extrude, a combine-cut and a sweep .... 

EDIT: to illustrate the idea, imagine I have a 3d figure that is very precious to me and quite fragile. I managed to get a detailed 3d scan of it and now I want to have a supporting block in which I can put that 3d figure and the back will be fully supported. The pocket will take the overall projection of the figurine, and the bottom of the pocket will have the exact 3d shape of said figurine.