Surface Smoothing Problem

3D Design
1

Hello

I have a problem when I want to make a smoothing function...

I want to make a kind of groove with a particular shape.

I have sketched a basic surface and the upper surface of this groove as well as its profile (in grey), as you can see below;

 

However, when I validate the function, I end up with a shape that is not the one I wanted.

For example, I can't find the radius on the other side of my shape:

 

 

Do you know why it does that?

I can't use the Swiped Surface feature because my base profile is peculiar.

I am attaching the file to you, if you wish to take a closer look.

Thank you.


test.sldprt
2

Hello, you can use several guide curves, or the body symmetry function, 

1 Like
3

I've already used the two guide curves that are highlighted in blue.

4

Hello 

Attached is your modified file. Don't hesitate to make several surface tiles to get your hands on your shapes. 


test_ind01.sldprt
5

Hello @SimonB 

Your shape seems perfect to me on the sole condition that you hide the three sketches that you used to make the smoothing

Right-click on each sketch ===> click on the eye (hide)

You can also select shaded image instead of "Edges in shaded image mode" but this is less convenient in use.

If I understood your problem correctly.

Kind regards


test_lissage_2021-06-17_10_47_27-solidworks_premium_2019_sp5.0_-_test1.sldprt.jpg
6

Oh dear, thank you but you recorded it in a version that I can't read.

I am working under the 2018 version, is it possible to save it in this format please?

7

@Zozo_mp Hello, no, it's not perfect, because if you rotate the shape to see the other side, you don't find a radius as big as I would have liked according to the sketch of my profile... 

1 Like
8

I made you a small PDF of the modification I made.


surface.pdf
1 Like
9

Hello again, here is my hypothesis (described above), 


116746.
1 Like
10

 @SimonB

Oops:    Ok, understood! Make a symmetry of the shape at each end (as proposed by @Lynk  )

So for the smoothing you have two guide curves (sketch 9 and 10) but you have to make a symmetry of sketch 8. 

In any case, it won't be enough because you have other flaws if you compare the profile obtained with sketch 8. Which means that you need as many guide curves as you have points on sketch 8: in this case four.

I didn't look at the option to do everything in surface and thicken but a priori it should have  the advantage of less deformation because the surface has no thickness

  SW always makes mistakes in tight turns and in any case when the number of guide lines is insufficient.

It is likely to be simple and quick to do only one half and then make a symmetry of the extruded part after smoothing. There you will have no more defects because the symmetry is very well respected by SW. You still have to add two guide curves before the profile that will be symmetrical is perfect

Your topic is interesting ;-)

Kind regards

 

1 Like
11

 @SimonB

Good! I have just looked at the sketches that you use for the guidelines.

For sketch 1, your splines are not dimensioned so the one on the left is not equal to the one on the right so you will have one or more defects! The same goes for sketch 9. These defects also affect the smoothing connection (the arrows of the spline curves are not collinear)

All this militates even more for a half piece that will be symmetrical.
Kind regards

[HS On]
Your part is so small (16.69 x 0.27) unless the dimensions are in inches that the plan will be more accurate than the stamped part.
You should look at stamping tools to account for stamping deformations. A perfect plan and a part that doesn't reflect it will earn you back and forth with the machinist   ;-)   ;-)
[HS Off]

1 Like
12

 Hello@SimonB 

I must say that it is not a simple smoothing but not impossible.

The main error is given by splines that are not symmetrical. 

The two handles are not on the same line. I fixed it with a tg line.

Then you have two symmetries, why not use them?

I used the more practical surface in this case.

I added a guide curve at the end because the two oblongs are not parallel. Both radii can be adjusted. 

 


test.sldprt
3 Likes
13

Question 

Is it necessary that the axes of the up and down rays be shifted?

It seems to me that the problem comes from the 

Since your grey line profile needs to stretch 

@+

1 Like
14

Thank you for your answers, it helped me a lot.

The tutorials made in pdf are perfect.

On the other hand, I don't know why, I have a lot of trouble reproducing this "boundary surface" function...

For example, it gives me "error" when I select my profile with the selection manager.

Where does this problem come from??