10 Replies Latest reply on Feb 29, 2016 3:52 PM by J. Mather

    3d Tubing

    Robert Hodges

      Hello all,

       

      I need some suggestions on how to re-produce the tube below. The tube is part of a bicycle frame. This is the left tube and I will mirror the right tube. The rest of the frame is complete, and I have used the Weldment Feature to create the tubing along the sketch path. The thing that is throwing me off is the rotating and the bend of the tube. Would I use the Twist Feature? I am a student, and somewhat familiar with 3d sketching, but can this be done by simpler means? Thanks for any help!

       

       

      left tube.jpg

        • Re: 3d Tubing
          J. Mather

          If you 2D sketch the right view and the top view, you can have SolidWorks find the 3D instersection curve for the Sweep.

          • Re: 3d Tubing
            Jamil Snead

            3D sketches can be hard to manage, especially when some of the lines are going at weird angles and not along X/Y/Z. I would approach this with a series of 2D sketches, following the steps as they are written and creating a new sketch plane for each rotation step. See my attached example.

            tubing.PNGtubing2.PNG

              • Re: 3d Tubing
                Robert Hodges

                Thanks, for the help! I am definitely more comfortable with 2d, and I think I should be able to do it as suggested.

                • Re: 3d Tubing
                  Carlos Guevara

                  HI Jamil. I have been looking for days for someone who knew how to do this. The problem I am having is that I have a pipe here physically now but no drawing for it. So I have taken measurements off of it. After trying to draw it in Solidworks I was finding that I cannot get the rotation angle in because it will change my bend angle. I tried to work around this by inserting a plane with the angle I needed and lining up the center line of the sweep.

                   

                  Jamil can you please show me how I can draw this part properly like you did for this gentleman. I tried following your part posted here but I do not understand composite curve and how you inserted the leg lengths for each straight run of tube.

                   

                  The only other info i have is this:

                  bend nobend angleclock rotationcount clock rotationtan-end dimension
                  14559.5
                  292746.5
                  3444529.25
                  4456112.5
                  5

                   

                  but the only stuff I gather from this is the bend angle and the rotation, I do not know what tan-end means?

                • Re: 3d Tubing
                  Carlos Guevara

                  I measured the part I have here and the bend radius on all bends is 6".

                    • Re: 3d Tubing
                      J. Mather

                      Carlos Guevara wrote:

                       

                      I measured the part I have here and the bend radius on all bends is 6".

                      The radius I am interested is the centerline arc - this would have to be interpolated as there is no physical centerline.

                      Is this what you "measured", or are you referring to the minor radius of the actual part?


                      Edit: Oh wait a minute - I see in your first post image that radius is 4"?

                      What is the tube diameter?

                      Edit 2: Now that I start the model - I see that the dimensions in the original image do not match the chart dimensions.

                      Edit 3:  I would expect to see one more straight length than the number of bends in the table unless the pipe begins or ends with a bend?

                       

                      Edit 4. Do you have a pretty photograph of the actual tube that you can attach here?