Tuesday, 7 January 2014

Surface Modeling - A Door Knob

In this tutorial you learn :

  • How to model a Door Knob using the new BlueSurf command of Solid Edge
  • How to use the BlueSurf command
  • Thicken surfaces to make solids
    It is assumed that you are familiar with the basics of Solid Edge Part modeling.
  • t3300

    Visualize It - Front View

    Its important to first understand the shape of the door knob before modeling it.
    For this silhouette or driving curves prove useful.
    Identify the driving curves of the door knob — those curves that actually drive the finished shape of the surfaces.
    All you need to do on in the first few steps is read and understand.
    The top view of the door knob is as shown in figure.





    t3301

     

    Drawing the profile - Front view

    Start with creating a sketch in the the x-y plane.
    Using the Curve  
    curvtool   tool, create the outline of the door knob.
    See figure.

     


    t3302

    Front Side Curve


    Draw a circle in a plane parallel to the x-z plane (front plane) and passing through the end points of the top view curves.
    See figure.
    Connect the circle well to the end points of both the curves.

     



    t3303

    Right Side Curve


    Draw an ellipse in a plane parallel to the y-z plane and passing through other end points of the top view curve.
    See figure.
    Connect the ellipse well to the end points of both the curves as shown in figure.

     


    t3304

    The BlueSurf - First Curve


    Click the BlueSurf   bluesurf   tool on the surfacing toolbar.
    Select the circle on the left.

     

    t3305

    The BlueSurf - Second Curve


    Then select the ellipse on the right.

     

    t3306

    BlueSurf Appears


    Click accept accept   and then Preview.
    A BlueSurf spanning the two cross-sections along a straight line will be created as shown in figure.
    You need to guide the bluesurf along the two top view curves.

     



    t3307

    Add a Guide Curve


    Still in the BlueSurf command,
    Click the Add Guide Curves
    guidcurv   button on the ribbon bar.
    Select the curve as shown and click accept
    accept[4]

     



    t3308

    BlueSurf changes Form - Curve 1


    The BlueSurf changes its form as shown in figure.

     

    t3309

    Add Another Guide Curve


    Similarly, select the other curve as shown in figure.
    Click the accept
    accept[6] and then the   Preview button.
    Click the BlueSurf Options button on the ribbon bar.
    In the dialog box that appears, take the Standard Tab.
    Under End Capping, select Close ends. then OK.
    Click Finish.

     



    t3310

    BlueSurf Created


    A BlueSurf, as shown in figure, is finally created .
    This surface spans the circle and the ellipse and is guided by the two curves.

     

    t3311

    Surface to Solid


    Click the Thicken   thicken   tool on the Features toolbar.
    The Thicken tool is in the same flyout as the Thin Wall and Thin Region tools.
    Select the BlueSurf to thicken.
    Use a small value of 1 mm to thicken in any direction.

     



    t3312

    Door Knob Ready


    Finally, add rounds to the circle and ellipse part for aesthetics, etc.
    Apply your favorite colors (brass, bronze, etc.) using the Part Painter.

     

    t3300[4]

    More Aesthetic


    From an even more aesthetic point of view, you can make one of the top view curves a little wavy.
    This will make the door knob conform to your fingers.

     

    t3313

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