Sprial torsion spring
Sprial torsion spring
(OP)
Hi,
Attached is a spiral torsion spring I need to paramerterize in Catia v5 rel 19 P2. The parameraterization needs to have the tail hooked ends to update with the internal diameter change. Has anyone attempted or had any success trying to do this type of spring?
Thanks for any help given.
Attached is a spiral torsion spring I need to paramerterize in Catia v5 rel 19 P2. The parameraterization needs to have the tail hooked ends to update with the internal diameter change. Has anyone attempted or had any success trying to do this type of spring?
Thanks for any help given.





RE: Sprial torsion spring
1. start in the center, and define the centerline of the spring
2. make the straight section first, defining the beginning of the spiral
3. make the spiral from the end of the line, defining the end of the spiral
4. make a sketch of the hook, based on the endpoint of the spiral.
5. Join the line, spiral and hook into a single curve.
6. make a pad with the THICK option, based on the Join.
7. add the edge fillets
There's probably other ways to do it.
RE: Sprial torsion spring
RE: Sprial torsion spring
The instructions above would be for the free state position of the spring, when no loads/torque are applied and the spring is in a true "spriral" shape.
But when the one end is rotated, putting the spring under load, the shape is no longer a true spiral. Even if the solid was parameterized, it wouldn't be the true shape. I belief you could get this deformed shape with FEA software, but I'm not sure if CATIA GPS or ELFINI will do this.
RE: Sprial torsion spring