Need some help creating a lip along the cut curve

[alex.p]

(i've just realized i have posted in the wrong place, trying to move it now to Manufacture)

Hello,

this is really a beginner question, and i try not to bother people without the need, but i'm really stuck here. I'm trying to design a shell around the frame. Shell needs to be 3d printed. Because of the size it needs to be cut, printed separately and joined together. I need to create a lip at each side, so it can be bolted together, rather than simply welded. Here i'm attaching the video, where i'm trying to describe the problem to the best of my abilities. PS Also, I have  tried to create vertical ribs unsuccessfully as well (so the thin walls are a bit stronger), but without success so far. If someone can show me, how to do it on this object as well, i would be eternally grateful )

Here is the video: https://youtu.be/kM69A3iAl-c 

[davebYYPCU]

Check or search for the Sweep Tool.

I can check your file a bit later, how many ribs - spacing, and cross section size all need to be worked out, then the Sweep Tool will do them.

Might help....

[alex.p]

Thank you. I thought Sweep (i said Swipe in video, but i really meant Sweep) would be the one to use here. I'm struggling with drawing the right sketch (from which to Sweep), cannot wrap my mind on which surface or plane to draw it. Regarding the Ribs - my problem is sketching the lines in the right place again. Spacing for ribs is something i need to play with to see what the weight of the model is going to be.   Every time i do it (try to create a rib from a line) - it gives me an error that it not properly intersecting with the body i'm trying to place ribs on. So both problems are drawing correct sketches, as i understand. I'm really concerned about the lib on the edges of the model more though, because i feel i haven't played enough with ribs and haven't exhausted all the opportunities. With the lib i have spent a lot of time trying to figure it out though.

[SEIZMICdesign]

isn't there a rib/web tool?

[alex.p]

I think i'm getting somewhere with creating Ribs, just managed to get my fist one. Not the way i wanted, but i'm staring to understand it. Not really there with the contact lips on the edges though.

[SEIZMICdesign · Accepted solution]

for the lip/flange you are wanting to build (I think I understand you correctly) you'll want to create a new sketch on your trim plane at the end. then while editing the sketch, under "Create" in the "Project / Include" submenu, chose "Intersect". Then slide your mouse over the shell. It will light up where your shell intersects the plane. Select your shell and confirm in the dialog window. you will now have a sketch line to build from. 

Use the offset command to offset the line, or the line tool to build exactly the shape you need for your flange. Make sure to close the ends of the sketches so you have a closed shape to build from. then extrude the shape to the thickness you want your flange/tab to be. 

As far as your ribs, the center lines must be sketched on the surface (must be flat) or a plane parallel-ish to the surface you want them on. using the web tool they will then grow out of or project onto the surface. 

[SEIZMICdesign]

nice - keep at it! also, not sure how big your part is, but looks like you might want to add some thickness to it for 3D printing. PS remember to look at all the options in the dialog boxes!

[alex.p]

Woohoo! Thank you!!! That is it. Regarding the thickness for printing, yes, i doubt a single wall 0.4 (as i have currently designed) would be enough (even with ribs, well depends how many, i suppose). Now that i can create lips/flanges it could be tested.

[davebYYPCU · Accepted solution]

Had a chance to look through the file, 

I have done what I think you want, change the sizes in the features to suit the design intent.

I used the other part of the body sketched the 6 lines for a web,

web on the long lines are 1.2 wide, and the short lines are 3.2mm wide.

I shelled the body at .4mm as pre the other one, 

made the webs, 

Offset the outside of the body to the inside, 3.2mm, to make all the webs now 2.8 high off the inside.

Split the body with the offset surface, and hide the offcut webs, 

Split the body with the short lines, and the flange you wanted is already there.

Use eyeballs and section analysis to see the results,  when you open the file, it has a working section analysis, so turn it's eyeball off.

Happy to answer question this may cause.

Might help.... 

[alex.p]

wow, this is beautiful! Thank you. I'm struggling to understand some things in there for now, hopefully morning will bring more clarity ) I feel like i might need to ask a follow up question, but i better play with it for a day or two first. Thanks again, this is very much appreciated.