Analysis of flat spring 1

[regis99]

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?

 

[desertfox]

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.

 

[IRstuff]

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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[drawoh]

regis99,

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

--
JHG

 

[regis99]

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.

 

[IRstuff]

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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