Constant Force vs Displacement Spring?
Constant Force vs Displacement Spring?
(OP)
Besides a Nickel Titanium spring (which is not accurate in saying constant force vs displacement), are there any combinations of springs or designs of springs that would equate to a constant force vs displacement.
I was thinking conical spring but I'm not sure this is what I'm looking for. I understand there are constant force springs, but these are more tape like and I need something that is closer to a compression spring. The other ideas are closer to a progressive spring, but according to my calculations this would only give a combined spring coefficient.
I was thinking conical spring but I'm not sure this is what I'm looking for. I understand there are constant force springs, but these are more tape like and I need something that is closer to a compression spring. The other ideas are closer to a progressive spring, but according to my calculations this would only give a combined spring coefficient.





RE: Constant Force vs Displacement Spring?
At the cost of more friction, a normal air cylinder will do it over a longer stroke.
At the cost of still more friction, a band-sealed cylinder will do it over a still longer stroke. (I forget right now what you call them. They comprise a C-section extrusion. The load attaches to the side of the piston, not the end. The connection between load and cylinder slides through some interlocking metal and rubber bands that seal the open side of the C but allow the connection to move.)
Mike Halloran
Pembroke Pines, FL, USA
RE: Constant Force vs Displacement Spring?
Try www.pipingtech.com/products/ptpcat/content.htm or any other of many spring support suppliers.
RE: Constant Force vs Displacement Spring?
The other idea I had was to come up with a mechanical stop where one spring would stop and another take over at a certain distance, thus keeping the same displacement force throughout the spring distance.
RE: Constant Force vs Displacement Spring?
http://www.airpot.com/beta/html/model56.html
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RE: Constant Force vs Displacement Spring?
RE: Constant Force vs Displacement Spring?
Perhaps you need to describe what function you want in more detail, rather than what you assume to tbe the solution.
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RE: Constant Force vs Displacement Spring?
Would opposing pole magnetics cause a constant force over displacement?
RE: Constant Force vs Displacement Spring?
Mike Halloran
Pembroke Pines, FL, USA
RE: Constant Force vs Displacement Spring?
TTFN
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RE: Constant Force vs Displacement Spring?
RE: Constant Force vs Displacement Spring?
RE: Constant Force vs Displacement Spring?
RE: Constant Force vs Displacement Spring?
http://sdp-si.com/D757/Libdownload.htm
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RE: Constant Force vs Displacement Spring?