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Bend It Like ... A CrossCurve
Application 1 of 3

Tushar Suradkar
www.oocities.org/SeGuruCool

  segurucool @ indiatimes.com


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    Bend It - Prologue

    This tutorial is continuation in the series of the article - Bend It Like...A CrossCurve

    This series of three tutorials show you how to make three varieties of the same object - A BackRest - using the cross curve tool.

  • Bending an Open Curve - Splendor/Boxer BackRest bar. (this tutorial)


  • Bending a Closed Curve - Calliber 115 BackRest.


  • Bending a Closed Curve with a hole - Scooty Pep Backrest.







    • Top View Curve

    Begin by creating a curve in the x-y plane.





    Top View Curve - Top View

    When viewed in the sketcher, the curve would look something like as shown in figure.

    Apply tangent relationship to all connected curves.

    Here, the dimensions or even the form of the backrest bar is not important.

    This tutorial shows you the approach to create the backrest bar.

    You may go out into the parking and take actual measurements.






    Side View Curve

    Create another curve in a plane parallel to the y-z plane.

    See figure.






    Side View Curve - Normal View

    The side view curve may extend beyond the limits of the top view curve drawn earlier.

    But in no case should the new curve fall short of the extents of the earlier curve.

    Here too, apply tangent relationship to all connected curves.






    Cross Curve


    Select the Cross Curve command from the Surfacing toolbar as shown.





    First Curve


    Select the Side view curve as the first curve.

    Click accept     on the ribbon bar.





    Second Curve


    Select the top view curve as the second curve.

    Click accept     on the ribbon bar.





    Cross Curve


    Click Finish on the ribbon bar.

    Soon the cross curve is formed.

    The cross curve is neither in the top plane nor in the side plane.

    It travels in 3D space, giving us the desired path to create the backrest bar.

    In other words, the top view curve is effectively bent by the side curve.





    Normal Plane

    Hide all sketches.

    Create a plane normal to the new cross curve at one of its end.

    Use the Plane Normal to Curve command from the Features toolbar.





    Plane Created

    The new plane appears smaller in size than parallel created planes.

    Your figure should now look as shown.





    Sketch the profile

    Create a sketch (a circle) on the new plane and at the end of the cross curve.

    See figure.





    Swept Surface


    Click the Swept Surface     tool on the Surfacing toolbar.

    Complete the extrusion of the circle along the cross curve





    Close Ends


    In the Swept Surface, click the Close Ends option on the ribbon bar.

    This ensures that the ends of the protrusion are capped or closed.





    Surface to Solid


    Click the Thicken     tool on the Features toolbar.

    The thicken command is on the same flyout as Thin Wall and Thin Region tool.

    Select the swept surface and thicken it by a value not more than the radius of the circle..

    Finally, round the end faces of the solid handlebar. (see figure)





    Summary

    The figure on right shows the summary and sequence of all commands.





    Tushar Suradkar     segurucool @ indiatimes.com

    Also Visit :

    CadGuruCool   |   SeGuruCool   |   ProeGuruCool