4 Replies Latest reply on Nov 17, 2006 6:19 PM by

    Bicycle seat

      Here is a model of a bike-seat.
      http://www.zxys.com/swparts/
        • Bicycle seat
          As with most things in SolidWorks, there are several ways to get the job done. As a starting point, I'd suggest that you get friendly with lofts.

          My fantasy seat is symmetrical, so I only sketched one half of it.

          I used a set of planes (I made these in 1 step by asking for 5 planes 2" apart parallel to the Front plane) for my cross section profile sketches.

          I then created sketches representing the top outline (using the Top plane) and side outline (using the Right plane) of the seat. These were mostly guides for my eye as I sketched cross sections of the seat. You might want to experiment using them as guide curves and cut down on the number of profile sections.

          I also added point sketches at each end of the seat so I could loft to a point.

          With all of the sketches set up, I then created a loft. The first pass gave a pretty rough surface. I then went back and edited each cross section sketch using the combs so I could smooth the surface a little bit. You can spend quite a bit of time diddling with the combs and polygon controls to get an aerodynamic surface.

          I also used View>Dislpay>Zebra stripes and curvature to watch the surface as I refined it.

          At the same time that I was editing the sketch splines for smoothness, I was also interested in the minimum radius of curvature since I planned on shelling the part.

          Final steps were to mirror and shell.

          I'm not sure I'd want to sit on this seat, but you could use it as a study guide.

          Gerald Davis CSWP
          SW07 SP2.0EV Office Professional
          2GB / Opteron 175 / FX3400 / ASUS A8N32-SLI
          http://www.cosug.com Colorado SolidWorks User Group
          • Bicycle seat
            You want to go and read Ed Eaton's tutorials on "Curvy Stuff" from his design consultancie's wed site http://www.dimontegroup.com/Tutorials.htm. He gives a solid grounding in how splines and surface lofts behave. One of his great insights is NOT to necessarily evenly space your loft cross sections. In one of these tutourials he is modeling a bicycle seat.
            • Bicycle seat
              I would definitely be interested in hearing how other people would do this model. I am just starting in surfacing, and I am an engineer, not an artist so anything to help designs look good is welcomed!

              Peter Gillespie
              SolidWorks 2004 SP1 / COSMOS 2004
              • Bicycle seat
                Which tutorials should I study in order to draw a bicycle seat.

                Is there a process out there that makes such a design less difficullt?

                Should I keep certain ideas in mind? Which ones?