Smooth surface

3D Design Volume Model
1

Hello! I am in the process of modeling a plastic chair, but when I create the surface with guide curves I always have a problem between the seat of the chair and the armrest. How do you make this part smooth and straight?

 

2

Hello

Can you attach the file to see please?

3

We can see that you've come a long way since your last job

The problem you are raising is the overthickness of the penetration of the base of your armrests

Try to modify the outline of your armrests 

You'll have to play a lot with the splines I think

Testing

@+

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4

Here is attached the file:)


plastic_chair_blueprint.sldprt
5

Hello

Did you follow the right profile in the front view?

 

1 Like
6

I have done a lot of tests but none of them are really satisfactory ...  

7

your file is in future version for me

so posted screenshots with the sketches of this

so your sketches must be in blue

You should be able to pull on your sketch lines to get to something clean

@+

8

The problem comes from the smoothed surface function which has a hard time understanding, use the filled surface function instead, it works by itself see attached. Moreover, the curves are not really usable sketches, transnform the always into sketches. Here I have put in the same 3D sketch your intersection curve and the two little bits of thing that complete it.

Otherwise your image copy is all good

 

Good luck and have a good day


chaise_plastique.pdf
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9

I forgot a very important point so as not to have pain in my buttocks. In order to guarantee a perfect continuity between the initial surface and its symmetry, you can create a tool surface from the middle curve and force the filled surface to be tangent to it, see attached pdf

 

Have a good day


chaise_plastique_suite.pdf
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10

 @ Pierre Mihailovic just gave you the right answer it seems to me

@+

1 Like
11

Hello

Another tip, a beautiful surface comes from beautiful sketches, so you need at most sketches with continuity of curvature, for example the 3D sketch, I wouldn't have made lines but two splines with continuity of curvature on the curves of the armrest.

@+

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12

Thank you very much I managed to solve the problem!

13

Coyote is quite right,

For beautiful surfaces you need as few sketches as possible but well-worked sketches with tangency or curvature continuities (surfaces are like splines, you don't need too many constraints, but the right ones, for it to go well). If smoothed or boundary surfaces are used, there must be clear and non-tangent connections between the two directions of the mesh, otherwise filled surfaces are preferred. Moreover, it is better to make surfaces that overflow the final result and then recut them. In this case I would not have made a surface that sticks to the images as accurately as possible, but they would have been used to cut everything out cleanly.

It's true that the surface requires a little time and then Solidworks doesn't understand everything, especially in the case of curvature continuity.....

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