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Problem with surfacing

Question asked by Francisco Guerra on Apr 15, 2018
Latest reply on Apr 20, 2018 by Bruce Cain

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Hello friends:

I'm trying to do something similar like the attached PH file (this came from a .stl file, not editable) for a university project. I don't have much expertise in SolidWork and don't know if I'm in the right way, but started with 2 surfaces to then use the knit surface with the option of create a solid and merge the entities, but solidworks gave me an error saying the a solid can't be created. Please check my file MO1.

Any recomendations?

Maybe I should start with a 3D Sketch or other way unknown to me?

Somebody can help me with some intructions to do what I want using surfaces.

Thank you all¡¡¡

Bruce Cain Apr 17, 2018 5:59 PM

Correct Answer

Hi Francisco,

Create a surface parallel to the Alzado plane that is located at the corner of the small protrusion (noted in attached image) and create a surface plane using a sketch on that plane. Use that surface to trim each of the current surfaces removing the unwanted sections on either side of that surface plane that are interfering with each other. once these are trimmed you can merge the surfaces and then thicken

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MO1.SLDPRT.zip169.3 KB
PH.SLDPRT.zip10.0 MB

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Bruce Cain Apr 17, 2018 4:40 PM

HI Francisco,

What you want to do at this point is to trim the two surfaces at a neutral line then merge the two surfaces using a Surface-Knit feature. You can't have overlying surfaces and do a knit feature. Once the surfaces are knitted, you can then thicken it and make a solid.

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Francisco Guerra @ Bruce Cain on Apr 17, 2018 5:35 PM

Hi Bruce, thank you for your time to answer me.

I spent a time working with parallel planes, splines, extruded, lofted and boundary surfaces and now it seem that is working, but I'm having troubles with the part between the thumb and the index finger (I don't know if you saw the PH file). I'm a beginner and don't have the expertise to get that part.

Would be possible for you to help me with that?

Thank you again¡¡

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Bruce Cain @ Francisco Guerra on Apr 17, 2018 5:59 PM

Hi Francisco,

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Francisco Guerra @ Bruce Cain on Apr 18, 2018 11:54 AM

Hi Bruce,

I did what you said and it worked... now I understand that wasn't working due to my imprecise geometry. Thank you for that¡¡¡

I need your expertise related to my last question about the difficulties of the part between the thumb and index finger, I was talking about the part of the PH file (please check image below):

I don't know exactly how to do that part.

Maybe with another plane in 45° or other similar angle?

Or with a 3D sketch and splines?

Or other way?

Thank you Bruce.

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Bruce Cain @ Francisco Guerra on Apr 20, 2018 1:00 PM

Hi Francisco,

Your ideas will all probably work in some form. Deciding the best one is up to you. You could even do a revolve to get the shape and then trim the surfaces. That's the great thing about SOLIDWORKS is there is usually never only one way to do things. Try something, if that doesn't work, try something else. Once you get something that does work, try and refine it from there. The best things is to keep trying.

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5 Replies

Bruce Cain Apr 17, 2018 4:40 PM
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Correct Answer
HI Francisco,

What you want to do at this point is to trim the two surfaces at a neutral line then merge the two surfaces using a Surface-Knit feature. You can't have overlying surfaces and do a knit feature. Once the surfaces are knitted, you can then thicken it and make a solid.
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- Francisco Guerra @ Bruce Cain on Apr 17, 2018 5:35 PM
  Mark Correct
  Correct Answer
  Hi Bruce, thank you for your time to answer me.
  
  I spent a time working with parallel planes, splines, extruded, lofted and boundary surfaces and now it seem that is working, but I'm having troubles with the part between the thumb and the index finger (I don't know if you saw the PH file). I'm a beginner and don't have the expertise to get that part.
  
  Would be possible for you to help me with that?
  
  Thank you again¡¡
  Like • Show 1 Like1
  Actions
  - Bruce Cain @ Francisco Guerra on Apr 17, 2018 5:59 PM
    Unmark Correct
    Correct Answer
    Hi Francisco,
    
    Create a surface parallel to the Alzado plane that is located at the corner of the small protrusion (noted in attached image) and create a surface plane using a sketch on that plane. Use that surface to trim each of the current surfaces removing the unwanted sections on either side of that surface plane that are interfering with each other. once these are trimmed you can merge the surfaces and then thicken
    Like • Show 2 Likes2
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    - Francisco Guerra @ Bruce Cain on Apr 18, 2018 11:54 AM
      Mark Correct
      Correct Answer
      Hi Bruce,
      
      I did what you said and it worked... now I understand that wasn't working due to my imprecise geometry. Thank you for that¡¡¡
      I need your expertise related to my last question about the difficulties of the part between the thumb and index finger, I was talking about the part of the PH file (please check image below):
      I don't know exactly how to do that part.
      Maybe with another plane in 45° or other similar angle?
      Or with a 3D sketch and splines?
      Or other way?
      
      Thank you Bruce.
      Like • Show 1 Like1
      Actions
      - Bruce Cain @ Francisco Guerra on Apr 20, 2018 1:00 PM
        Mark Correct
        Correct Answer
        Hi Francisco,
        
        Your ideas will all probably work in some form. Deciding the best one is up to you. You could even do a revolve to get the shape and then trim the surfaces. That's the great thing about SOLIDWORKS is there is usually never only one way to do things. Try something, if that doesn't work, try something else. Once you get something that does work, try and refine it from there. The best things is to keep trying.
        Like • Show 2 Likes2
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Problem with surfacing

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