Springs: - Types of springs:- Helical Spring Conical and volute springs Tension springs Laminated or leaf springs Disc or Belleville springs Special purpose springs Some Important Formula:- Solid length, Free length, Spring Index, Spring Rate, Pitch,

Springs: - A spring is defined as an elastic body whose function is to distort when loaded and to recover its original shape when the load is removed.

Types of springs:- Helical Spring Conical and volute springs Tension springs Laminated or leaf springs Disc or Belleville springs Special purpose springs Helical Spring Conical and volute springs Tension springs Laminated or leaf springs Disc or Belleville springs Special purpose springs . Some Important Formula:-

Solid length :- LS = n’d Where n’ = Total number of coils, and d = Diameter of the wire Free Length :- LF = solid length + maximum compression + clearance between adjacent coils LF = n’d + δ_max + 0.15δ_max Spring index :- C = D/d Where, D = Mean diameter of the coil, and d = Diameter of the wire Spring rate :- k = w/δ Where w = Load, and δ = Deflection of the spring Pitch :- P = (Free length)/(n^'-1) P = (L_F-L_S)/n^' + d Where, LF = Free length of the spring LS = Solid length of the spring n’ = Total number of the coils, and d = Diameter of the wire Note: - The minimum gap between two coils when the spring is in the Free State is taken as 1mm. LF = n.d + (n-1) And pitch of the coil P = L_F/(n-1)