German federn springs federn models federn prices

federn springs are energy accumulators; they have the function of storing energy but cannot release it slowly. To achieve slow release, a "spring + high gear ratio mechanism" is required, which is common in mechanical watches. Helical springs have been applied since ancient times; bows and crossbows from antiquity are two types of helical springs in a broad sense. According to external shape, they can be divided into ordinary cylindrical helical springs and variable-diameter helical springs (see figure); according to the direction of the helix, they can be divided into left-hand springs and right-hand springs. Cylindrical helical springs have a simple structure, are easy to manufacture, and are the most widely used. Their characteristic curve is linear, and they can serve as compression springs, extension springs, and torsion springs. When the load is large and radial dimensions are limited, two compression springs with different diameters can be nested together to form a combination spring. Variable-diameter helical springs include conical helical springs, spiral volute springs, and concave helical springs. Conical helical springs offer good buffering performance and can withstand large loads. Spiral volute springs can store more energy and withstand larger loads, but the manufacturing process is relatively complex. The performance of concave helical springs is similar to that of conical helical springs, and they are mostly used in seat cushions and mattresses. Spring steel wire cross-sections include circular and rectangular shapes, with circular cross-sections being the most commonly used.

federn spring influencing factors

Springback includes angular springback and curvature springback, which is the result of the combined effect of springback in the bending deformation zone and the non-deformation zone. There are many factors affecting springback, mainly: (1) material mechanical properties σs, Eoσs the higher the value, the smaller the E value, the greater the bending springback; (2) degree of deformation r/t. Under the same conditions, the amount of angular springback increases as the r/t value increases; the amount of curvature springback decreases as the r/t value increases; (3) bending center angle αo a large bending center angle α results in a large springback angle; (4) die clearance Z. Large clearance between the punch and die results in large springback; (5) bending method. Free bending results in large springback, corrected bending results in smaller springback, and full-form upsetting bending results in the smallest springback; (6) workpiece shape and material microstructure state. Complex shapes with multiple interactions result in small springback, while cold working hardening results in large springback; (7) die structure and magnitude of blank holder force. Large blank holder force results in small springback after bending the workpiece.

federn spring advantages and classification

The advantages of leaf springs are simple structure, reliable operation, low cost, and easy maintenance. They serve as both the elastic element of the suspension and the guiding device. One end is hinged to the frame, allowing it to transmit various forces and torques and determine the wheel's runout trajectory. At the same time, it provides a certain amount of frictional damping. Achieving three benefits at once, it is widely used in non-independent suspensions. Leaf springs are classified by shape: 1) Elliptical leaf spring; 2) Semi-elliptical leaf spring; 3) Quarter-elliptical leaf spring; 4) Single-leaf spring. Elliptical, semi-elliptical, and quarter-elliptical leaf springs are all composite types of leaf springs, relying on the friction between the leaves to provide high buffering and vibration damping performance, widely used in the suspension systems of automobiles, tractors, and railway vehicles; single-leaf springs are made from a single piece of spring steel and are mostly used in mechanical equipment and instruments to press working components.

federn spring functions and applications

1) Reset function: Springs deform under external force and return to their original state when the force is removed. Many tools and devices utilize this property of springs for resetting. For example, reset springs are installed on the hinges of many building doors, allowing the door to automatically reset after people enter or exit. This function is also used to make automatic umbrellas, automatic pencils, and other convenient items. In addition, various buttons and keys require reset springs. 2) Drive function: Mechanical clocks and wind-up toys are driven by tightening the mainspring. When the mainspring is tightened, it undergoes bending deformation and stores a certain amount of elastic potential energy. Upon release, the elastic potential energy is converted into kinetic energy, driving rotation through a transmission device. Toy guns, starter pistols, and military firearms also operate using this property of springs. 3) Buffering function: Springs are installed between the locomotive/automobile frame and wheels to use the elasticity of the springs to reduce vehicle bumpiness. 4) Vibration and sound generation function: When air flows through the reed holes of harmonicas and accordions, it impacts the reeds, causing them to vibrate and produce sound.

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