Spring design question

I want to create a spring with both closed and ground ends using a family
table. Most of our company's springs are purchased from Lee Spring Co. and
they only supply OD, Wire Dia, Free Length, Spring Rate, and Solid Height. I
need to be able to figure out the total number of coils based on this info
to include in the part relations. Is there a formula? Does anyone have a
similar Pro/E model or know where I can download one?

 

"Machinery's Handbook" has a complete section on springs and spring design with
all the formulas. The way Stu suggests is roughly correct or completely right for
plain springs. For ground ends, it's the number of turns minus one and for closed
ends, closed and ground or squared and ground, it's the number of turns minus two.

David Janes

 

Thanks Stu and David,

I emailed Lee Spring with the question and they called me within an hour
with the same answer you both gave. Your help is always appreciated.

Jason