6 compression springs connected in parallel in car clutch to transmit axial force of 1500N. Springs are compressed 10 mm to achieve the desired force. The quarter number is D/d=6.
Springs are made of cold-drawn steel wire with sigma (b) = 1200MPa. Allowable shear stress is sigma (allowable) = 0.5sigma)b)(G=81370MPa).
The springs have “squared ground ends”. There should be a 1mm distance between the turns when the force is maximum.
-thread diameter d
-spring center diameter D
-number of active turns N
-number of turns N
-free length L0
-collapsed solid length Ls
-spring stiffness (the one needed from the input, the one following the calculated spring parameters)
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