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I need help with debossing an area of a surface

Question asked by Nathan Rollins on Jul 3, 2014
Latest reply on Jul 4, 2014 by Deepak Gupta

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Hi all,

Here's a 3D geometry creation challenge... At least for me. Hopefully not for you.

This is a rectanglar plastic shell that needs an area debossed. The area wraps around the corner of this soft rectangle. I need to control the edges of the debossed feature to remain parallel with their repective midplanes. I tried projecting three discrete sketches onto each "face" (top, right, front...) keeping the endpoints of the sketches aligned and tangent with the other two, but I had trouble with that - and even if I wrestled it to work, I think there is a better way. I am wondering if 3D sketches can help - something I have zero experience with but want to learn.

Anyway, take a look and let me know if you've done something like this before and if so, can you provide me with some tips / hints on how to achieve this?

Thanks!

-Nate

Deepak Gupta Jul 3, 2014 9:26 AM

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Here are two different ways.

P.S. version 3.2 doesn't have all fillets.

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J. Mather Jul 3, 2014 7:35 AM
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Hard to tell from a picture (can you attach the *.sldprt file).

I am thinking split the faces, create a zero offset surface, thicken and combine-subtract.
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- Nathan Rollins @ J. Mather on Jul 3, 2014 7:46 AM
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  I can supply the SLDPRT, but there isn't anything to see - the area on my jpg is sketched by hand with a pencil. I have no trouble with splitting surfaces and creating the geometry, my problem is getting the area defined as described in my jpg. How do you split the faces where I've indicated? How do you keep the edges of the area parallel to the different planes?
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  - Deepak Gupta @ Nathan Rollins on Jul 3, 2014 7:57 AM
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    You can use both 2d sketch as well 3d sketch to get that kind of sketch but please note that in the end it would be a 3d sketch/curve. So better use a 3d sketch.
    
    Create three planes parallel to plane/surface you need. Now start a 3d sketch and using intersection curve option get the required entities onto the surface. Finally filet the open end and you'll have the required sketch/curve.
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  - Krzysztof Wojcik @ Nathan Rollins on Jul 3, 2014 8:15 AM
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    Sorry to interrupt your discussion but i try to understand what is happening here. As i'm a beginner i try to use forum to teach myself different techniques how to use solidworks.
    
    I don't know if i understood the problem, here is my try. Sorry if i went wrong way.
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    indent.SLDPRT.zip719.8 KB
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    - Deepak Gupta @ Krzysztof Wojcik on Jul 3, 2014 8:27 AM
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      For your example, you don't need an indent feature. Simply do a cut extrude and move the shell to end
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      indent2.SLDPRT.zip2.1 MB
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Krzysztof Wojcik Jul 3, 2014 7:46 AM
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I'm not sure byt maybe you can use Indent.
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Nathan Rollins Jul 3, 2014 8:52 AM
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Krzysztof (coolest name ever...) and Deepak,

You have inspired me -

this image is closer to what I am looking for. I see the indent feature as (something I have never seen before) a tool for creating much more complicated geometry. In the example I gave, Deepak is right, and using a very simlar technique - putting the deboss geometry before the shell will get me what I want. And a simple extrude with fillets is a way to get there. I wanted to define the shape and as Mr. Mather suggested, split the surfs at that edge and push the surface in an amount.

I also need to learn if 3D sketches are at all useful for something like this

The attached sldprt file shows a partial solution - all I need to do is reorder some things so that my deboss comes before the shell.

The two big lessons I get from this thread are:
1 - indent feature
2 - multi-body part! (after 18 years of driving Pro/E and NOT having that tool, I am still not used to using it to its potential. How did I live so long without it?)

Thanks guys - excellent discussion. I look forward to more ideas on this...
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- indent3.SLDPRT.zip1,006.5 KB
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- Krzysztof Wojcik @ Nathan Rollins on Jul 3, 2014 9:04 AM
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  Nice that i could help.
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- Krzysztof Wojcik @ Nathan Rollins on Jul 3, 2014 9:18 AM
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  Second try
  
  EDIT: I forgot to add shell at the end...
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  - indent4.SLDPRT.zip516.9 KB
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  - Nathan Rollins @ Krzysztof Wojcik on Jul 3, 2014 9:38 AM
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    cool use of Shell and Combine...
    Thanks!
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  - Deepak Gupta @ Krzysztof Wojcik on Jul 4, 2014 3:49 AM
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    Good one
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- Deepak Gupta @ Nathan Rollins on Jul 3, 2014 9:26 AM
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  Here are two different ways.
  
  P.S. version 3.2 doesn't have all fillets.
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  - indent3.1-2.zip4.0 MB
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  - Nathan Rollins @ Deepak Gupta on Jul 3, 2014 9:40 AM
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    Thank you Deepak,
    
    These are techniques that I will likely use - until the geometry gets beyond a simple extrude. Then I think the indent feature might work well,
    
    -Nate
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