EXTENTSİON SPRİNG TECHNICAL DRAWING

Springs store energy elements. Pull Bows, stay in the elastic material, provided that the publication in line with the axis of force F thus opening a stored energy can be retrieved later.
Terminology of Extentsion springs :

d: The spring wire diameter of spring material ( mm )
Di: İnner diameter of Spring ( mm )
Dm: Di+d : The average diameter spring   ( mm)
P: Opened broadcast pitch ( mm)
∞:Although the spring was opened helix angle: alpha (degrees)
∞= Arctan ( p / π * Dm ) ( π :Number of pi = 3,1416 )

Tightly wrapped in small springs that twelve-degree angle alpha, the force acting on foot of the spring material with the wire just so torsional shear stress generated directly by shear stress is considered.
Maximum shear stress acting on any installations or wire kesidine (K) the above-mentioned sum of the two shear stress.
For the calculation of the maximum shear stress mode of operation can be selected between the two.