ColdWound
COLD WOUND COIL SPRING
- Feature
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Cold Wound Coil Spring uses materials with 0.1mm-10mm diameter, In general, the shape of the materials is round section, but for special purposes, there are nonlinear sectional spring that is used for the engine valves of autos recently, and square sectional spring. Coiling on the cylinder-shape is most common, but for special purposes, there are ping tail end spring in which the diameter of the left part coil is minimized, cylinder-shaped spring, cone-shaped spring, and double-headed drum type spring. In case of tension coil spring, the loop of the spring and the end of the loop are various in terms of the shape
- Usage
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For the engine valves of autos, vehicles, industrial equipment, control valves, pipe hangers, dustproof devices, electronic equipment requiring small springs, etc.
- Cold coil spring materials
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Classification Standards No. Symbol Usage (Reference) Remark Univerlectro Electric Conduction Non-Magnetic Heat Resis tance Corrosion Resis tance Fatigue Resis tance Hard Drawn
Steel WireKS D 3510 hSW2 O hSW3 Steel Music Wire KS D 3556 PW O O Spring Carbon
Steel Oil -
Tempered WireKS D 3579 SWO O Carbon Steel
Oil-Tempered
Wire for
Valve SpringKS D 3580 SWO-V O O Chrome
Vanadium Steel
Oil-Tempered
Wire for
Valve SpringKS D 3581 SWOCV-V O O O Spring Steel
Oil-Tempered
Wire for
Valve SpringKS D 3582 SWOSC-V O O O Spring
Stainless
Steel WireKS D 3535 STS 302 O O O STS 304 O O O STS 306 O O O STS 631 J1 O O O Brass Wire KS D 5130 C2600 W-H O O O C2600 W-EH C2700 W-H C2600 W-EH O O O C2800 W-H Nickel
Silver WireKS D 5102 C7521 W-H O O O C7541 W-H O O O C7701 W-H O O O Copper Wire C5101 W-H O C5191 W-H O C5122 W-H O Betilrum
Copper WireC1720 W-H O
- Specification
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Record of specification in ordering helical extension spring Classification Special Requirements Remarks Material in use Choose the material based on the manufacturer'
sstandards unless specified otherwiseDiameter of the
mm material (d)mm Mean diameter of coil (Dm) mm The tolerance is managed through management
of the outer diameterOuter diameter of coil (Do) mm Management of the outer diameter tolerance is required
depending on the conditions for useLength of the coil to be wound (Ch) mm Shall be based on the reference value Total no, of coils (turns) (Nt) Vol Shall be based on the reference value, and regulate
the management through discussion with usersFree height (Fh) mm Shall be based on the reference value in case there
is a designation of load managementRolling direction Right side Designation of spring features Height Load Shall be based on the manufacturer's reference value
in case there is no designated height and loadmm kgf Spring constant kgf/mm Shape of coil end Round loop The shape of the loop should be recorded. Surface management after molding Shot peening Surface treatment Treatment with rust preventive oil is possible upon request Use or conditions for use Record of Use Condition Indicate use, temperature in use,
humidity and environment for useOther specifications applicable KS B2402, KS B2403