2 Replies Latest reply on Aug 6, 2012 9:45 AM by Sama Kadakia

    How to construct a dynamic tapered surface or feature on this model?

    Sama Kadakia

      I want to model a network geometry similar to the first attached part (Constant Depth Network_SWF). The network part of the design was created by extruding from a base sketch.

       

      However, optimizing the design requires the depths to vary at certain points along the network. Ideally, SolidWorks would allow me to do something called a variable extrusion where I can choose the height of an extrusion at specified control points. Since SolidWorks doesn't have this capability I've explored workarounds like creating profiles and breaking the base sketch into guide curves so that I could either loft or boundary base/boss to construct the varying depths. 

       

      The problem with this method is that because every bifurcation branches into two channels, I'm not able to smoothly transition the lofts from the parent profile to both the child profiles. When I try to boundary or loft half the parent profile to one of the children profiles and mirror it, SolidWorks doesn't allow me to do it because the mirroring face is curved.

       

      Lastly, the dimensions of the entire device are defined by equations that require the input of a few parameters because I want to easily create many geometries by simply changing the parameter values. Because there can't be any sharp edges but I want to maintain control of the widths of each channel, fitted splines are the ideal way for me to round out sharp edges. When using the boundary or loft features, I can't use fitted splines so I fillet them but the fillets don't update dynamically. When I change the parameter values of the design, the fillets no longer recognize the edges they were once filleting and this makes it difficult to quickly create lots of different models or configurations.

       

      I have also attached one of the varying depth models that was constructed by breaking the original sketch down into guides connecting profile sketches of different depths.

        • Re: How to construct a dynamic tapered surface or feature on this model?
          Jerry Steiger

          Sama,

           

          I don't have time to open your models (and am still on SW 2010, so I probably can't anyway), so I can't offer much advice. There is one thing you said that I don't understand; that you can't use fitted splines for Boundary or Loft features. I don't have that limitation; fitted splines work fine for both profiles and guide curves in both Loft and Boundary features.

           

          Jerry Steiger

            • Re: How to construct a dynamic tapered surface or feature on this model?
              Sama Kadakia

              Hi Jerry,

               

              I guess I should clarify my problem. I am able to use splines as a guide curve. However, I am creating a bifurcation network where I must be able to control the height of the solid body, the bifurcation angle and the widths at the bifurcation. Because I would like the path from one profile to bifurcate and reach two other profiles, I'm having trouble using the boundary and loft features.

               

              I decided to connect the main profile to an extended profile and then cut out the space in between that I wanted to.

               

              Sama Kadakia