I am a high school shop teacher and have been teaching myself Rhino 4 for many years now, slowly building to 3d. I know a little but need some help. The project I am working on is making a belt buckle for sandcasting so all the sides have to be tapered 5 degrees and all corners filleted. I am going to machine this on my CNC mill or get it 3d printed.
My problem is I don’t know how to create a surface that is curved without splitting it from another object. So far I have done in step:
- Created a 4" x 2.5" elipse to make the overall shape of a standard oval buckle
- Off set the oval inwards 0.25" to create the inner portion were text and designs will go
- Created a 36" cylinder and split out a portion of the cylinder to create the curved surface I wanted, this gave me an the oval curved the correct ammount.
- Split out the center portion of the new surface at the 0.25" offset curve for the text and designs
- Created curves from dulipacting border to make curves I can snap to.
- Extruded curve tapered 5 degrees to create the outer edge of the buckle and inner edge where the text and designs will go forming a 0.125" depression
This is where I am stuck. I need to create a curved surface to make the bottom of the depression and the same but for the bottom of the belt buckle. I tried 1 rail revolve but the result is less that desirable. Patch works and creates the curved surface in the x axis but it is curved in the y axis as well not flat, in other words it is dished, not curved.
Here is the file if you can help, it is greatly appreciated: https://www.mediafire.com/?n48vbdntt6dnn6p