how do I extrude up to a body?

[Anonymous]

Solidworks lets you extrude up to a body. How can I do that in Fusion 360, or is there another way to go about accomplishing the same thing? 

I'm trying to extrude up to a curved surface of a solid body, but don't want to penetrate the body. 

[HughesTooling]

On the extrude dialog under extents there's an option To, have you tried that?

Mark

[sjeffff]

Could you share us a picture, to give some detailed context of your problem?

[Anonymous]

it is not possible to extrude curve surfaces, but fusion 360 has a surface workspace which you can use, make a patch surface using splines and then use offset and combine two surfaces with loft.

[chrisplyler]

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@Anonymous wrote:

it is not possible to extrude curve surfaces, but fusion 360 has a surface workspace which you can use, make a patch surface using splines and then use offset and combine two surfaces with loft.

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The question was not how to extrude a curved surface. The question was how to extrude TO a curved surface.

[g-andresen]

Hi,

extrude "to object" without penetrating it:

extrude "to object"

günther

[Anonymous]

Thank you so much for the great image! Unfortunately when I repeat what you're doing here , F360 ends the extrude at the selected surface, not the selected body. 

I've shelled out the interior of my firetruck, and I'm trying to thicken the floor. Since Fusion 360 does not seem to support a multi-thickness shell, I decided to do things the dumb way and extrude to body. 

Unfortunately, as you can see in the above image, when I follow the procedure indicated by the gif, the extrude feature penetrates through the wheel well. I've circled to the two problematic penetrations. 

[Anonymous]

I'm trying to make a firetruck. I've shelled out the cab, but need to make the floor thicker than the walls. It doesn't seem like F360 supports multi-thickness shells, so I'm trying to extrude a thicker floor. I need to extrude to body because otherwise the extrusion will penetrate the wheel wells . 

Here is a section view. You can see that I've selected Body1 (the red cab) from the browser tree on the left. Nonetheless "OK" is grayed out. Possibly this is because the extrusion is directed upward (and maybe Body1 can't fully terminate the extrusion in that direction due to the windshield opening)? I can't figure out how to change the extrusion direction with a body selected as the terminating object. If I grab the direction arrow, the body gets deselected. If I select the body, the extrusion changes direction back to upward. It's obnoxious. 

[sjeffff]

It may sound counter-intuitive. But use a combine modifier. With this feature you can select two objects, and use one as a tool to cut the other.

[g-andresen]

Hi,

in the hope I understood it correctly.

[Anonymous]

When I do what you are doing, the extrude penetrates into the wheel wells. Can you show/check if that is happening? Thank you! 

[laughingcreek · Accepted solution]

You could use boundary fill.

[chrisplyler]

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@Anonymous wrote:

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In this case, try extruding FROM OBJECT, select the floor face, and then give it a distance of the thickness you want to add.

Or possibly just Push/Pull the interior floor faces upwards.

[Anonymous]

That doesn't work. It produces gaps around the wheel well. 

[Anonymous]

Interesting! I had no idea that feature even existed. That seems to solve the problem. Thank you so much! 

[chrisplyler]

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@Anonymous wrote:

That doesn't work. It produces gaps around the wheel well.

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Of course. Did you think an Extrude operation would magically follow curves? Thicken the floor, and then fill in the gaps left around the wheel wells.

OR...

Depending on the order you did things, back up to before the wheel wells were created, do the Shell, thicken the floor as desired, and then add the wheel wells.

[Anonymous]

I'm not sure how much modeling you do, but this is not an unusual problem. In solidworks you will typically tackle it in one of two ways. 

1) You do a multi-thickness shell where the floor is thick and the other walls are thin. 

2) Or you do a single thickness shell, then declare a surface offset plane, and extrude downward toward the body. The extrude terminates wherever it meets the other body. 

Doing a simple extrude and then filling in the gaps is not a good way to tackle this type of situation. It makes fragile models that tend to produce errors when you have to change dimensions or make revisions. 

Doing a simple extrusion before cutting the wheel wells is not an option either. This would leave gaping holes between the wheels and the cab, which you would have to fill with additional extrudes (which would again make the model fragile). 

[laughingcreek]

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@rhythmslab wrote:

1) You do a multi-thickness shell where the floor is thick and the other walls are thin. 

2) Or you do a single thickness shell, then declare a surface offset plane, and extrude downward toward the body. The extrude terminates wherever it meets the other body. 

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Option 1 is of course not available in Fusion.

Option 2 is a good option, but I don't think any more robust than the boundary fill method.  potato patoto.

in case the OP is interested, here is how the extrude option wood work.

[chrisplyler]

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@Anonymous wrote:

I'm not sure how much modeling you do, but this is not an unusual problem. In solidworks you will typically tackle it in one of two ways. 

1) You do a multi-thickness shell where the floor is thick and the other walls are thin. 

2) Or you do a single thickness shell, then declare a surface offset plane, and extrude downward toward the body. The extrude terminates wherever it meets the other body. 

Doing a simple extrude and then filling in the gaps is not a good way to tackle this type of situation. It makes fragile models that tend to produce errors when you have to change dimensions or make revisions. 

Doing a simple extrusion before cutting the wheel wells is not an option either. This would leave gaping holes between the wheels and the cab, which you would have to fill with additional extrudes (which would again make the model fragile). 

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I do plenty of modeling. Notice how I've got a forum rank of 11, while you've got a forum rank of 2?

First...I know filling the gaps isn't ideal. It's not suitable for every model. It's prone to breaking under some conditions. But in this particular case, if we assume the floor will never be thickened to or above the top of the wheel well, it will be fine.

Second...I prefer to avoid the Shell tool if it isn't too much trouble to do so. So I often sketch enough that I won't need to, as per the following video that shows how I can change the thickness by changing a sketch dimension. Please note that towards the end of the video, I demonstrate the Push/Pull tool performing the task regardless.

Screencast will be displayed here after you click Post.

98e6617f-0ab4-43df-996c-24b1c791dde6

https://knowledge.autodesk.com/community/screencast/98e6617f-0ab4-43df-996c-24b1c791dde6

[chrisplyler]

Now in this video, just for purposes of demonstration, I did create the body with the Shell tool. Please note that the Push/Pull tool works just the same regardless.

https://knowledge.autodesk.com/community/screencast/c1e2285b-1777-4517-8fe2-fc5b60384071