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Analysis of flat spring

Analysis of flat spring

Analysis of flat spring

(OP)
I have to redesign a copper flat spring. One end of the spring is fixed and the other end is free. In order for it to function, the free end must deflect/compress 1 inch.
A lever must strike the free end of the spring in order to deflect it 1 inch. But sometimes there's a bounce back from the spring and it doesn't deflect the 1 in.
How should this be analysed in order to minimize the bounce back between the surface of the spring and surface of the lever?

RE: Analysis of flat spring

Hi

Please provide a sketch and some dimensions of the situation, I cannot imagine exactly what you mean by bounce back that happens occasionally.
Are you certain that the spring material is copper? I think it's more likely to be a bronze material.

RE: Analysis of flat spring

Is this for school?

WHY does it need to deflect 1"?

A bounce implies that the lever has insufficient momentum. Nothing to do with the spring, unless the spring is just too strong.

How do you know that the lever momentum is repeatable?

TTFN
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RE: Analysis of flat spring

regis99,

Copper is a rotten material to make a spring of. Could your material be berylllium copper?

--
JHG

RE: Analysis of flat spring

(OP)
Material is Beryllium copper. I'll post link to a sketch in a few days.
Need it to deflect for the potential energy in spring.
Lever is operated by hand.

RE: Analysis of flat spring

Then, the issue is with the hand operation. There's no way to manually operate this sort of thing repeatably if you are counting on the operator's hand repeating the exact same motions every time. This can only be possible with a mechanism that provides the energy.

TTFN
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Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers

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