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Tangency problem boundary surface

By rblej on 21 Jun 16:16 3 answers 2 comments

Hello, i am making kind of a covering cloth wich after i want to thicken to 1mm. I have tried numerous combinations of sections but i always have a point were the surface makes an error.

All the sketches are supposed to be tangent but still have this problem

Added images

Square

Attachments

problem1.SLDPRT, 232 KB
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3 answers

  • FredSWUG
    FredSWUG 4 months ago

    1- Clean up the sketches. I did this by trimming half of the sketch away. No sense making a half, when a quarter works. Also make sure the ends of each spline are tangent to a construction line at the ends where it will be mirrored.

    2- Extrude on of the splines as a surface.

    3- repeat on the other spline

    4- Apply a boundary patch between the two surfaces. Is this feature in SW2015? I'm sure you'll find out.
    Technically you don't HAVE to do steps 2-3, but I find it easier to make the boundary tangent to a surface than messing with planes for the directional vector option.

    5- settings four boundary surface. make sure things are tangent!

    6- hide or delete the surfaces from steps 2-3

    7- Mirror as needed with the knit surfaces check box enabled

    8. Check the shape with zebra stripes

    SolidWorks model is 2017. Step attached as a reference as well.

    Attachments

    problem1-1.STEP, 557 KB
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    problem1-1.SLDPRT, 205 KB
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  • rblej
    rblej 4 months ago

    I have tried loft also and same problem.

    Attachments

    problem2.SLDPRT, 162 KB
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  • Stephen Nyberg
    Stephen Nyberg 4 months ago

    So I mirrored the entities in your Sketch 1 and Sketch 4

    Then I used the Surface Fill feature with Sketch 1 as my Patch Boundary and in contact (I also left Optimize surface checked) and then Sketch3 and Sketch4 as my constraint curves.

    It thickened nicely

    Attachments

    problem1.SLDPRT, 334 KB
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