Spiral spring design
Spiral spring design
(OP)
Hello everybody,
I have to integrate a spring in an actuator, and I was thinking about a round wire spiral spring. Unfortunately I have no experience in the design of such spring.
first question: does the torque versus angle formula is linear or what is the calculation formula?
2nd: what is the maximum angular stroke I can have with such spring.
The torque values for my application are arround 25 to 100 mNm and the Spring OD would be about 38mm.
Does it exist a simple software to design it?
In advance thx for your help.
bye
I have to integrate a spring in an actuator, and I was thinking about a round wire spiral spring. Unfortunately I have no experience in the design of such spring.
first question: does the torque versus angle formula is linear or what is the calculation formula?
2nd: what is the maximum angular stroke I can have with such spring.
The torque values for my application are arround 25 to 100 mNm and the Spring OD would be about 38mm.
Does it exist a simple software to design it?
In advance thx for your help.
bye
Electro-mechanical designer





RE: Spiral spring design
http://www.webspawner.com/users/israelkk/
RE: Spiral spring design
http://www.webspawner.com/users/israelkk/
RE: Spiral spring design
thx for your answer,
the actuator will run for a million cycles, and I would like to have about 15 mNm preload torque and after aa angle stroke of 70° the spring torque would not exceed 40 mNm.
The OD of the spring will be about 38mm and I assum that the ID will be arround 20mm. I made a rought calculation and I found a spiral spring with 2.5 turns and a stiffness of 0.31 mNm/° But I'm really not sure of my calculation.
What about your software, can I have more details on it.
In advance thx.
Bye
Electro-mechanical designer
RE: Spiral spring design
The software you refer to does not deal with spiral springs made of round wire but only spiral springs (hair and brush springs) made of rectangular strip wire. For spiral spring made of round wire I use a custom made other software for my personal use as a consultant.
http://www.webspawner.com/users/israelkk/