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Bend It Like ... A CrossCurve
Application 2 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.


  • Bending an Closed Curve - Calliber 115 BackRest. ( this tutorial )


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







  • Top View Curve

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

    Draw only the half part of the final object.





    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 is not important.

    This tutorial shows you the approach to create the backrest.

    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 curve to create the backrest.

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





    The Bounded Surface

    Hide all sketches.

    Click the Bounded Surface command from the Surfacing toolbar.

    Select all the edges of the cross curve by dragging a window around it.

    Click Finish on the ribbon bar.

    A surface will be formed from the edges.




    Surface to Solid


    Click the Thicken     tool on the Features toolbar.

    The Thicken tool is in the same flyout as the Thin Wall and Thin Region tools.

    Select the bounded surface to thicken.

    Use an appropriate value to thicken in any direction.

    Round off sharp edges of the backrest and mirror the half part to complete the backrest.



    Summary

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





    Tushar Suradkar     segurucool @ indiatimes.com

    Also Visit :

    CadGuruCool   |   SeGuruCool   |   ProeGuruCool