In order to facilitate customers' selection and customization of springs, some brief introductions and specifications of springs have been summarized as follows:
1γ The commonly used springs can be classified into three categories: tension coil springs, compression coil springs, and torsion coil springs.
Among them, stretch and compression springs are mostly mass-produced, with complex specifications but suitable for application with slight modifications. If a small amount is needed and the characteristics of the spring are not picky, it is easy to purchase on the market but the unit price is relatively high.
And users of exclusive mechanism parts mostly customize from professional spring manufacturers; If you are unable to design it yourself, you can also pay an additional fee to ask the manufacturer to cooperate with the trial production.
In recent years, the industry has adopted CNC computer-controlled or mechanical spring machinery for automated and labor-saving production, resulting in relatively stable quality. Based on the increasing quality requirements of ISO and internationally, almost all spring manufacturers can provide report data for testing spring characteristics.
2γ Special occasions can be classified into: torsion bar, scroll spring, thin plate spring, disc-shaped spring, wavy spring, spring washer, buckle ring, annular spring, and other shaped springs.
These springs have different specifications due to different usage environments and require customization from the spring manufacturer.
3γ Spiral spring specifications and dimensions:
3-1. Wire diameter: The main characteristic of a coil spring is the size of the wire diameter.
3-2. Outer diameter: It is convenient to measure the outer diameter of the coil spring and easy to identify the size.
3-3. Number of turns: total number of turns, effective turns, closed end turns; The ability of a coil spring to withstand external reaction forces depends in part on the number of turns.
3-4. Pitch (lead): The variation distance of the head and tail ends of a coil of spiral spring wire on the axis. Generally, this value is only considered when making compression springs, and spring users do not need to specify its distance.
3-5. Free length: The length value of a stretched or compressed spring when no external force is applied to both ends. Generally speaking, the free length is independent of the spring function, and unless the closed ends are ground, a relatively loose tolerance range is allowed, or strict dimensional requirements are not made.
3-6. Effective length: When a coil spring is compressed or stretched to a fixed length, there should be a certain amount of reactive force to allow the paired item to be effective.
3-7. Free angle: The angle value at which the two legs of a torsion spring rotate without external force applied. Generally speaking, the angle formed between the two legs of a torsion spring is not easily identical in the free state, and is not required or allowed to have a relatively loose tolerance range unless it is necessary in special circumstances.
3-8. Action angle: When the two ends of the torsion spring are twisted in different directions to a fixed angle, there should be a reaction load force and torque value to enable the matched item to function effectively.
3-9. Spring constant: The reaction force generated by the axial direction of a tension or compression coil spring at each unit length when subjected to external deformation. The reaction force generated at each unit angle when the radial force of the torsion spring rotates under external force.
In the corresponding graph where the length is on the x-axis and the force is on the y-axis, the intersection points are almost connected in a straight line.
3-10. Length unit: Generally used in millimeters, while in Europe and America, inches are commonly used.
3-11. Load unit: The standard unit of force is N (Newton), or commonly used as Kgf (kilogram force) gf (gram force).
