Like most other basic mechanisms, metal spring there is already a long time of Bronze Age.
Even if it is metal, wood is used as the bow of a flexible and the structures of the military catapult.
During the Renaissance, accurate clocks and watches, make
precision spring for the first time become inevitable.
The 14th century saw the development of a revolutionary astronomical navigation precision of the clock.
World exploration and conquest of European colonial powers continue to provide dynamic watchmaker 'the science and art.
Another field of firearms, push the spring development.
The coming of the industrial revolution of the eighteenth century, put forward the bigger, accurate, cheap spring.
In view of the clockmaker 'spring often hand-made, spring mass production material for steel wire or similar materials.
Advanced manufacture method, make the spring is everywhere.
Computer control and processing sheet metal bending machine allows custom springs, obviously this is a kind of special machine.
Spring is only an accumulator, it has the function of storing energy, but not the energy release slowly.
F = kx, F elasticity, stiffness coefficient (k
Or stubborn coefficient)
, x for spring stretched (
Or a short)
The length of the.
Example 1: using 5 n force to pull of 100 n/m of the spring stiffness coefficient, the spring is 5 cm long case 2: a spring pulled in by the size of 10 n, chief, to 7 cm, the size of 20 n pulling force, presidents of 9 cm, the original length and elongation stress size 3 cm?
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