Generally used in mechanical ,vehicle cushioning and relay delay devices .
Shrapnel has various shapes and structures for different purposes ,According to the shape can be divided into straight and curved spring two kinds .
According to shape of the plate can be divied rectangriangles ,trapezoids ,triangles and phases .

Material include phosphrus bronze and tin bronze,65mn、55Si2Mn、60Si2MnA、55SiMnVB、55SiMnMoV、60CrMn、60CrMnB、302、316.

The characteristics of shrapnel are that it is easy to bend in only one direction - the minimum stiffness plane, while in the other direction it has large tensile stiffness and bending stiffness.

Therefore, the spring is suitable for detecting the sensitive elements, elastic support, positioning device and flexible connection of the instrument or automatic device.

According to the characteristics of materials, it is applied to different environmental works. The spring plates are widely used in various kinds of contact devices, and the most common ones are straight cantilever springs with the simplest shape.Contact sheet resistance must be small, so made of bronze.

Measuring the action of a leaf spring is the change force or displacement.
If the fixed structure and spring load mode can guarantee working length is constant, the leaf spring stiffness is constant, the scope of small deformation, when necessary, can also get nonlinear characteristics, such as the spring pressure on limit board or on the adjusting screw, change its working length.

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