Creating a slope along a circle

[Davidf01]

Hello I have another question for you. I'm trying to model a travel mug lid and need the top of the lid to slope up towards the siphole while mantaining the radius of the lid. Does anyone have any idea how to achieve this? 

Thanks for your help.

[Anonymous]

Hi, if the surface you're trying to create is rotationally symmetric, you could just sketch a profile and go to the Patch environment to do a revolve of that profile.  If you need more help let us know!

Jesse

[Davidf01]

Hi thanks for the reply. I'm attaching a picture to help explain what I'm trying to do. In the picture I show the lid with a simple extrude

cut across the lid to get the slope but what I want is the slope to be on a rotation instead of straight extrude cut across the lid.

This is very hard to explain hopefuly the picture helps.

[Anonymous]

Hmm, that's still hard to visualize what exactly you're trying to do.  If you upload the exported .f3d file here I could do a Patch environment Loft with a rail along the radius to see if that's what you're thinking of.

Jesse

[Davidf01]

jjurban55, thanks for the reply. As I said I'm new to Fusion 360 and I'm sure this should be an easy thing to do but I cant figure it out.

I have attached the file as you said. This lid is a sketch that has a revolve applied to get the basic shape. I'm not sure if extrude 11 is applied or not but make sure it is off.

Once that is done what I'm trying to do is have the top of the lid from the sip hole slope down about .25 inches towards the back of the lid to about the half way point and then flaten out for the rest of the diameter.  If I could do a 120 deg revolve cut with a .25" rise that would do it but I can't do a revolve cut with a rise.  

I was able to use a coil to get something close but I could not get the coil to start half way around the lid. It was always 180deg or less. I want the slope to start at the 9 oclock position if the sip hole was the 12oclock position. So it wouls slope up from 9:00 to 12:00.

Thanks for looking. Please let me know what you figure out.

[Anonymous]

Hmm, that's odd, Fusion is not successfully uploading the file.  If you go to the data panel and the people tab, you can add me to the project with my email jjurbanus5@yahoo.com

It would also help if you could make a rough sketch or two of what exactly you're trying to do.

Jesse

[Davidf01]

Ok I added you like you asked. I will try to do a drawing for you or something to help explain.

[Davidf01]

Ok here is a screen grab of what I'm trying to do. I made this using sculpt so you may have put me on o something. I'm just not sure how to

use sculpt bodies with sketch bodies to make one body. I guess I can use sketch for one part of the lid and sculpt for the upper part I'm just not sure how it would all fit

together as one piece?

[JamieGilchrist]

Hi Davidf01,

welcome to Fusion.  So I looked at your problem and this is a good one.

here's a simple approach to your design:

I created a base sketch for the ring of the lid.

I then sketched a spline to create the "truncated" shape.

in the patch workspace i extruded (symmetrically) that spline to make a surface to extrude to.

I then extruded the rings as a solid and used the "To" under the extents in the extrude dialog.

I've attached this file so you can see how i built it.  step back and forth in the timeline to see the steps and you can play with the source spline and see how the shape updates.  Since this was built in the parametric environment, changes early in your design will propogate to downstream features (e.g. the shape of the top of the rings based on changes to the spline).

hope this helps.  let us know if you have any other questions.

[Anonymous]

So for some reason upon section analysis it was showing hollow, even right after the revolve operation in the timeline, so I saved the component and inserted it into a new design to get a solid section analysis of the revolve shape.  I then made a sketch of two lines with a spline connecting them, with smooth constraints between the lines and spline, and activating the tangent handle can adjust the weight of the 2nd derivative continuity.  You can then just use that line as the splitting tool for the body.  By turning sketch constraint visibility on, you can drag the end points around and adjust the weight of the smoothness in real time!  Let me know if this works for you.

Jesse

EDIT: I saw gilchrj beat me to it! 😉

[Davidf01]

Gilchrj,

That spline idea is a nice way to do it the problem I have is how do I get the new ring to attach to the rest of the lid. I used a sketch to design the lid and did a revolve

to get the basic shape. I can reduce the ring part and use a sketch to to what you did but I will have to join it the the sketch/revolve part to make a full lid. All the videos I have watched so far and I have not seen a way to combine sketch models and free form models into one model.

I have attached a picture so you can see the rest of the lid. There is parts on the underside of the lid that need to be in there. I think I can make the sip hole part and the lower part of the lidas two parts but they will have to be combined to make the final part and thats what I have not figured out how to do yet.

[Anonymous]

Note I forgot to mention, when doing a Modify > Split body in Model environment, when selecting a curve as the tool, with extend splitting tool checked, curve will be extended perpendicular to its sketch plane in both directions.

Jesse

[Anonymous]

Hi David, please see the attached .f3d file in my other message and let me know if that works for your application.

Jesse

[Davidf01]

Ok I cant open this file. It says opening of local files is not allowed.

[Davidf01]

So I noticed that it looked hollow when I did a section view. I didn't know that was an issue but I did think it was strange. Would you know why it looked hollow and how can I fix it?

[Anonymous]

One interesting thing about Fusion 360 is you need to upload the model to the cloud before working on it.  So if you open the data panel via that rubrics cube looking button in the upper left, you should see an upload button appear.  Once uploaded you should see it appear in your list of models and be able to open it. 

Let me know if you run into problems.

Jesse

[Davidf01]

Ok I figured it out. I'm looking at the file now.....

[Anonymous]

I'm not sure why it did that, probably some kind of bug, but as you'll see in my model once you open it, I made it properly solid by deleting everything in the timeline except the very first sketch, then right clicking on the parent/top level component in your model and selecting Save a copy.  I then created a brand new model, opened the data panel (as described in previous post), then found the saved sketch/component and right clicked on it to choose Import.  From there I did a revolve of your sketch and it worked fine, making a solid body.

Nice design and modeling work thus far by the way!

Jesse

[Davidf01]

Oh Gezz I guess I should do what you did to fix the hollow thing before I get much further into the design. Is there a way to copy and paste the sketch into a new model to see if it fixes the hollow issue?

This is a remake of a lid I did for Collapse-A-Cup which is a travel mug I designed. I like a protruding sip hole verses a flat one. Thank for the compliment though.

[Davidf01]

Well I tried doing what you did here and it still shows the revolve as hollow once I made a section. Not sure what this is all about.