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wave curve design

ptc-4982504
Newbie

wave curve design

Hi,

Dear All, i have attached a zip file it seems to be diffilcult for me to model this, seeking for some help regarding this(addition of tutorial would be an asset).


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25 REPLIES 25

Re: wave curve design

i think no one can make this, using creo.

Re: wave curve design

I don't do .rar files, so if you could include an image that would help.

Re: wave curve design

Egg+tray+isometric.jpgEggwave-side.jpgEggwave-top.jpg

Re: wave curve design

see if this can be helpful

Re: wave curve design

Antonius,

you can use 7-zip program to unzip attached file (1st step) and unrar unzipped file (2nd step). There are three pictures inside the file.

Martin Hanak


Martin Hanák

Re: wave curve design

i have attached pictures .... !!!

Re: wave curve design

Thanks Martin. I don't open .rar on principle.

Re: wave curve design

Creo 2.0 attached

Re: wave curve design

Nice Darek. Welcome to the forum.

I learned a new trick about splines in sketches... select dimension and click the end of the spline, then place the dimension. Enter 0.5. This is Radius of Curvature.

Trick 2: select dimension; click the spline, click the end of the spline, click a line reference, and place the dimension. Enter an angle.

These tips have some dependencies but as a freshly created spline, you can do both of these.

Jasir, Darek's file was created using a variable named trajpar available in sweep sections. These are Variable Sweep Sections, or VSS. Very powerful capabilities for this type of challenge.

However, since each cell has a true planer-square, you have more options. In fact, there is a hidden command, Section Dome that might be useful. These challenges can take on a life of their own when you involve the industrial design people who want very specific curvatures. You need to take this into account when deciding how best to create a model such as this and how much flexibility you require.

Re: wave curve design

its not gonna work for me as file is CREO 2.0 and i am using CREO 1.0

Can u help please...

Re: wave curve design

The attached Step file was done using Warp.

Re: wave curve design

oh great man.....!!! its closest to required part(best than previous i.e made with sweep). very helpful ... can u give its .prt file or tutorial..

i have installed creo 2.0.. now u can send

thank u very much

Re: wave curve design

Just make a square Fill feature and use the Warp feature to deform the Fill feature. Then use the copy/paste special to rotate the feature 180 degrees. Repeat the copy/paste special for all the cells you need. Merge the surfaces into a single quilt and thicken. Round the edges and done.

When you copy/paste special, be sure to uncheck the option for hiding the original.

Re: wave curve design

I started to do this, then I sort of got bored with it. I rarely use the Warp command, so I wanted to mess it. It seems like I could not get the round marqee small enough to make a nice round warp shape and keep the edges flat, so not sure what I am doing wrong.

egg-tray1.JPG

Re: wave curve design

try this:

eggcrate_warp.PNG

Use the CTRL key to select the 4 drag points.

The problem I have with the warp tool is the lack of control for the dragging offset.

There is no way to duplicate the drag distance exactly on a second feature.

Re: wave curve design

ah ok, that's cool, I was using the Spine type.

warper.JPG

Re: wave curve design

Here is one to play with. It is somewhat tolerant of tweaking the shape of the cups.

Also has successful curvature controlled Boundary Blend for the corners.

eggcrate_III.PNG

Re: wave curve design

Thanks a lot i got it... it was very helpful session..

again thanks and keep it up....

Re: wave curve design

One other method to look at. It has a few more restrictions but better control over the profile. The sweep fails if the slopes are too steep.

eggcrate_IV.PNG

Re: wave curve design

It is possible to create the pattern by sweeping a curve along a curve. The enclosed example is built using two planar curves and a sweep. The second curve is swept along the first with a constant normal direction. This geometry is using two sinusoidal functions. The curves were created by equation where both sinusoids are expressed in parametric equations. You can change the shape by manipulation of the equation parameters. This is a single quilt that can be trimmed and matched to an arbitrary perimiter shape. Creo 2 model enclosed for reference.

eggcrate by sweep.jpg

Re: wave curve design

Yep, that is what I did in prt0535.prt.

Re: wave curve design

It still doesn't have the offset between rows. If you put eggs in this design they would still line up with each other. It's the offset that makes the original design so unique. How could you use this concept but still get the shift?

Re: wave curve design

The offet is there, it is just not easliy visualized. I used Antonius D.'s model to grab an image to make this clear as he has a more complete model.

The "offset" is achieved by trimming the quilt on a bias. Antonius has a valid solution. I am showing in my example how to employ equation driven curves using periodic functions as an alternative to get the "wave" quilt. You should be able to employ graphs to control the quilt shape as another option.

bias trim.jpg

Re: wave curve design

Ah, that makes sense.

On the other hand, if you cut it this way you won't end up with a level edge all the way around, right? Or is there this one perfect spot where everthing is the same height when cutting on an angle?

Re: wave curve design

That's the neat thing, Tom; with both waves being exactly the same, there is a perfectly flat square for each cell. However putting the radius on the corner requires a boundary blend to get it back to the same elevation. Turns out this is one that Creo doesn't mind developing as a curvature blend.

eggcrate_corner.PNG

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