Replacing helical spring with other elastic elements
Replacing helical spring with other elastic elements
(OP)
Hello,
I have some kind of positioning device that the back and for movement. The current block is positioned in the "0" position with helical spring. Helical spring produce noise and have insufficient range of stiffness.
I would like to replace helical springs with other elastic element (no gas spring).
Can you recommend me any isnt solution e.g. elestomer that is a durable compression and tension or material with quasi Newtonian fluid properties.
Thank you in advance.
//Termik
I have some kind of positioning device that the back and for movement. The current block is positioned in the "0" position with helical spring. Helical spring produce noise and have insufficient range of stiffness.
I would like to replace helical springs with other elastic element (no gas spring).
Can you recommend me any isnt solution e.g. elestomer that is a durable compression and tension or material with quasi Newtonian fluid properties.
Thank you in advance.
//Termik





RE: Replacing helical spring with other elastic elements
There are an awful lot of helical springs out there. A long leaf spring would centre your component. Do you have space for a leaf spring sticking out one side a considerable distance?
I suggest you set up a spreadsheet with your design parameters. Find a couple of spring catalogues. Punch in the spring specifications and see what works.
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JHG
RE: Replacing helical spring with other elastic elements
here is one.
http://www.profender4x4.com.au/wp-content/uploads/...
RE: Replacing helical spring with other elastic elements
"Schiefgehen wird, was schiefgehen kann" - das Murphygesetz
RE: Replacing helical spring with other elastic elements
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P.E. Metallurgy, Plymouth Tube
RE: Replacing helical spring with other elastic elements
Filling the chamber with oil should reduce or at least change the noise.
Changing the spring rate would change the natural frequency of the damper, which may not be what you want.
Beyond that, I'm not clear what you're talking about. Do you have a native English speaker available to help you clarify what you want?
Mike Halloran
Pembroke Pines, FL, USA
RE: Replacing helical spring with other elastic elements
Do you know any existing material for industry purpose or industry application with expanding rubber that you can see in chest expander (see below link).
http://www.nativefitness.se/v%C3%A5ra-produkter/li...
RE: Replacing helical spring with other elastic elements
RE: Replacing helical spring with other elastic elements
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RE: Replacing helical spring with other elastic elements
This looks to me like an application for leaf springs. Search Google for information on die springs. I like the medium force, blue painted ones. These probably will not work for you, but the design guides are interesting reading. If the spring is over a certain length, you need to support it from buckling, either with a rod, or an external cylinder. If rod only has to stop buckling, it can be plastic, possibly fibre reinforced. The same goes for the cylinder. This will cut down your noise. If the spring is short enough, the ends can sit in pockets.
Extension springs do not buckle. Can you make them work?
There are people out there who machine coil springs. Maybe they can machine something out of Delrin. Your machine design textbook should tell you how to design coil springs.
Again, I suggest you set your design requirements up on a spreadsheet, and go through the catalogues. There is an incredible variety of coil springs out there.
--
JHG
RE: Replacing helical spring with other elastic elements