how do i model a garter spring ?
how do i model a garter spring ?
(OP)
A garter spring is coil spring bent into circle as used in a shaft oil seal
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
how do i model a garter spring ?
|
how do i model a garter spring ?how do i model a garter spring ?(OP)
A garter spring is coil spring bent into circle as used in a shaft oil seal
Red Flag SubmittedThank you for helping keep Eng-Tips Forums free from inappropriate posts. Reply To This ThreadPosting in the Eng-Tips forums is a member-only feature.Click Here to join Eng-Tips and talk with other members! |
ResourcesWhat is rapid injection molding? For engineers working with tight product design timelines, rapid injection molding can be a critical tool for prototyping and testing functional models. Download Now
The world has changed considerably since the 1980s, when CAD first started displacing drafting tables. Download Now
Prototyping has always been a critical part of product development. Download Now
As the cloud is increasingly adopted for product development, questions remain as to just how cloud software tools compare to on-premise solutions. Download Now
|
RE: how do i model a garter spring ?
I'm actually working on a similar problem, though. I know UG allows you to create a helix following a spline, which gets a close approximation. And then that geometry can be brought into Solid Edge. Problem is, when you start modeling helix, your performance goes WAY down. That's why you typically don't bother modeling something like this in detail.
Since SE doesn't have a helical curve command, I'm working out the math to get XYZ data points for a spiral along a helix. Those data points can be used to create a curve by table and then that curve is used as a guide curve to a sweep. If you really want to model your spring, that's how you would have to do it as of v14.
--Scott
For some pleasure reading, try FAQ731-376
RE: how do i model a garter spring ?
If you want the spring to look realistic for rendering purposes etc. you could create a toroidal ring representing one coil of the wire, then create a radial pattern to fill the spring (if circular) - the wire won't form a helix, but it will take a sharp eye to notice! If the spring's shape is NON circular, the job becomes somewhat more difficult. Hopefully the pattern-along-curve capability in SEv15 will allow tasks like this to be accomplished more easily.
RE: how do i model a garter spring ?
R = major coil radius
r = minor coil radius
p = pitch
t = increment parameter
x = R*cos(t) + r*cos(pt) * cos(t)
y = R*sin(t) + r*cos(pt) * sin(t)
z = r*sin(pt)
However, even with a relatively low resolution (large increments in variable t), the model was 35MB. D'oh! So I replaced it with a model that looked like an O-ring for 202 KB.
Perhaps it would have been useful if I was *designing* garter springs instead of just using a stock component...
RE: how do i model a garter spring ?