What are the winding spring method

The winding spring what method is there? Spring factory introduced spring winding method is divided into two kinds: ( 1) Cold roll method: spring wire diameter d ≦ method of selection of 8 mm cold rolled coil inductance. Hot rolled under the springs of the common cold drawn and conditioning treatment after prior high quality carbon spring steel wire, generally have not to carry out the quenching after pouring machine, just rolled ultra-low temperature tempering to remove the thermal stress. ( 2) Hot coil method: spring wire diameter is very big, D st13 8 mm) Spring is with hot volume method. Under the hot rolling of the spring, is important to carry out quenching after folding, medium temperature tempering, etc.
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