German joos federn springs, joos federn models, joos federn prices

joos federn springs are helical springs that withstand axial tensile forces. Extension springs are generally manufactured from materials with a circular cross-section. When not under load, the coils of an extension spring are typically closed and have no gaps. Many different terminal devices or "hooks" are used to ensure the source of tension for the extension spring. The working principle of extension springs is opposite to that of compression springs. Compression springs exert a reactive force when compressed, while extension springs exert a reactive force when extended or pulled apart. When the two ends of an extension spring are pulled apart, the spring attempts to pull them back together. Like compression springs, extension springs also absorb and store energy. However, unlike compression springs, most extension springs are usually under a certain degree of tension even when there is no load. This initial tension determines the tightness of the extension spring coils when there is no load.

joos federn spring mechanical principles

Ring springs are formed by the combination of outer rings with inner conical surfaces and inner rings with outer conical surfaces. The number of outer ring pairs is determined by the magnitude of the load and the deformation requirements. Ring springs are commonly used in applications where space dimensions are limited but strong buffering is required. A ring spring consists of many pairs of inner and outer rings; if damaged or worn, it is not necessary to replace all of them, only the individual discarded rings need to be replaced, making repair easier and more economical. Since there is significant friction on the contact surfaces when the outer and inner rings slide relative to each other along the mating cones, the axial force is balanced by surface pressure and friction during loading. Therefore, this is equivalent to reducing the effect of the axial load, i.e., increasing the spring stiffness. During unloading, friction hinders the recovery of the spring's elastic deformation, thus equivalently reducing the spring force. The characteristic curve of a ring spring in one loading and unloading cycle is OABO; if there were no friction, it would be OC. During unloading, the characteristic curve switches from point B, rather than from point E, which is reduced due to spring elastic hysteresis. Ring spring: A spring composed of alternating stacked washer-like spring steel rings with inner conical and outer cylindrical surfaces, and washer-like spring steel rings with inner cylindrical and outer conical surfaces. The number of inner and outer ring pairs in a ring spring is determined based on the magnitude of the load it bears and the deformation requirements.

joos federn spring classification

1) Torsion springs: Torsion springs (torsional springs) utilize the principle of leverage, twisting or rotating elastic materials with softness and high toughness to generate significant mechanical energy. They are springs that withstand torsional deformation, and their working parts consist of coils that are either closely wound or separately wound. The end structure of a torsion spring is processed into various shapes of torsion arms, ranging from single torsion to double torsion, and even various torsion bar deformations, formed according to design. Torsion springs are commonly used in balancing mechanisms in machinery and are widely applied in industrial production such as automobiles, machine tools, and electrical appliances. 2) Compression springs: Compression springs are helical springs that withstand axial pressure. Springs are generally divided into equal-pitch springs and variable-pitch springs. The shapes of compression springs include: cylindrical, conical, convex, concave, and a small number of non-circular shapes. There is a certain gap between the coils of a compression spring. When subjected to external loads, the spring contracts and deforms, storing deformation energy. Variable-pitch springs are becoming more common and are no longer just equal-pitch springs; variable-pitch springs can perform different functions in different environments. 3) Carbon nanotube springs: The diameter of carbon nanotube springs can reach hundreds of micrometers, and their length can reach several centimeters. Their spinning structure has broad application prospects and is expected to be applied in fields such as stretchable conductors, flexible electrodes, micro strain sensors, supercapacitors, integrated circuits, solar cells, field emission sources, and energy dissipation fibers, providing the possibility of preparing visually visible carbon nanotube electronic devices. They are also expected to be applied in medical devices, such as tension-sensing bandages. This new type of structure can also be developed into multifunctional carbon nanotube fiber composite materials for utilization. 4) Extension springs: Extension springs are helical springs that withstand axial tensile forces. Extension springs are generally manufactured from materials with a circular cross-section. When not under load, the coils of an extension spring are typically closed and have no gaps. They work using the rebound force (tensile force) after extension, used to control the movement of machine parts, store energy, measure force magnitude, etc., and are widely used in machines and instruments. The hook forms include side-hook extension springs, long-hook extension springs, British-hook extension springs, German-hook extension springs, semi-circular hook extension springs, duck-bill hook extension springs, etc. Materials include stainless steel, music wire, high-carbon steel, phosphor bronze, beryllium copper, oil-tempered alloy spring steel, etc. 5) Air springs: An air spring is a non-metallic spring that achieves elastic action by adding pressurized air into a flexible sealed container, utilizing the compressibility of air. It can be roughly divided into two types: bladder type and diaphragm type. Air springs have excellent elastic characteristics. When used in the suspension systems of high-end vehicles, they can greatly improve vehicle smoothness, thereby significantly enhancing riding comfort. Therefore, air springs are widely used in automobiles and railway locomotives. In addition, since air springs have many advantages compared to ordinary steel springs, they are also applied in some mechanical equipment and precision instruments.

joos federn spring precautions

Due to product structure limitations, multi-strand springs generally have the characteristics of high strength and good performance. The material is required to guarantee the final performance in terms of spring strength and toughness. During the processing of multi-strand springs, attention should be paid to: 1. Support coils can use cold coiling or hot coiling methods according to product requirements. When using the hot coiling method, the spring must not be heated to the point of sparking or turning white; the temperature for silicon-manganese steel must not exceed 850℃. The support coils and effective coils must have effective contact, and the gap must not exceed 10% of the nominal inter-coil gap. 2. The characteristics of multi-strand springs can be determined by adjusting the lead, and the pitch can be adjusted as necessary during winding. The pitch can be 3~14 times the wire diameter, but generally 8~13 times is preferred. The spring force is also closely related to the free height, closed end coils, outer diameter, and wire performance, and can be changed by adjusting one or several of these items. 3. Springs without support coils and springs with excessively fine wire diameters should not have welded ends, but the end cables should not be obviously loose and burrs should be removed. For multi-strand springs requiring welded heads, the length of the welding part should be less than 3 times the cable diameter (maximum not greater than 10 mm). The heating length should be less than one coil, and it should be polished smooth after welding. During gas welding, the welding part should undergo local low-temperature annealing. 4. Spring surface treatment generally involves phosphating, but other treatments can also be performed. If zinc or cadmium plating is required, hydrogen removal treatment must be performed after electroplating. After hydrogen removal, extract 3% (no fewer than 3 pieces) for retesting and setting treatment; no fractures should occur during retesting. Springs should be cleaned of surface dirt, salt marks, and oxide scale, using methods such as sandblasting or gasoline cleaning, but acid washing must not be used. 5. The compression time for important springs is 24 hours, and for ordinary springs, it is 6 hours or continuous compression 3~5 times, holding for 3~5 seconds each time. During compression, the gap between the spring and the mandrel should be 10% of the mandrel diameter; if the gap is too small, operation is difficult, and if it is too large, the spring is prone to bending deformation. If one spring breaks during compression, the others should be reprocessed.

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