40/2/2 spring Germany durovis model 40/2/2 price

40/2/2 springs are helical springs that withstand compressive forces. The cross-section of the material used is mostly circular, but rectangular sections and multi-strand steel cables are also used. Springs generally have uniform pitch. 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 strain energy. Compression springs provide resistance to external compressive loads. Compression springs utilize multiple open coils to provide resistance to external pressure (such as gravity pressing down on wheels, or body weight pressing on a mattress). That is, they push back to resist external pressure. Compression springs are generally wound with uniform pitch from metal wire and have a fixed wire diameter. In addition, there are conical compression springs, or springs combining conical and straight sections. Depending on the application area, compression springs can be used to resist pressure and/or store energy. Round metal wire is the most commonly used for compression springs, but compression springs are also made from square, rectangular, and specially shaped metal wires.

40/2/2 spring applications

Steel wire compression springs are used in everything from home appliances to motorized equipment and motors, as they are the required type of spring. Compressed by loads acting on them or their ends, the design of compression springs attempts to return the spring to its original shape, thereby pushing back against the load. Main application areas: medical respiratory equipment, medical mobile equipment, hand tools, home care equipment, shock absorption, and engine valve springs.

40/2/2 spring structural classification

According to the nature of the force, springs can be divided into tension springs, compression springs, torsion springs, and bending springs. According to shape, they can be divided into disc springs, ring springs, leaf springs, helical springs, truncated conical volute springs, and torsion bar springs. According to the manufacturing process, they can be divided into cold-coiled springs and hot-coiled springs. Ordinary cylindrical springs are widely used due to their simple manufacturing, ability to be made into various forms according to load conditions, and simple structure. Spring manufacturing materials should generally have high elastic limits, fatigue limits, impact toughness, and good heat treatment performance. Commonly used materials include carbon spring steel, alloy spring steel, stainless spring steel, as well as copper alloys, nickel alloys, and rubber. Spring manufacturing methods include cold coiling and hot coiling. Spring wire diameters less than 8 mm are generally cold-coiled, while those greater than 8 mm are hot-coiled. Some springs undergo strong pressing or shot peening after manufacturing to improve their load-bearing capacity.

40/2/2 spring precautions

Due to product structure limitations, multi-strand springs generally feature high strength and good performance. The material must guarantee final performance in terms of spring strength and toughness. During the processing of multi-strand springs, note the following: 1. Support coils can be closed using either cold or hot closing methods as required by the product. When using hot closing, the spring must not be heated to the point of sparking or turning white; the temperature for silicon-manganese steel must not exceed 850℃. Support coils must effectively contact active coils, and the gap must not exceed 10% of the nominal inter-coil gap. 2. Multi-strand spring characteristics can be determined by adjusting the lead; the cable pitch can be adjusted as necessary during winding. The pitch can be 3~14 times the wire diameter, but 8~13 times is generally preferred. Spring force is also closely related to free height, closed end coils, outer diameter, and wire properties, and can be changed by adjusting one or more of these parameters. 3. Springs without support coils and springs with excessively thin wire diameters should not have welded ends, but the end cables must not be obviously loose and burrs must be removed. For multi-strand springs requiring welded heads, the welding length should be less than 3 times the cable diameter (maximum not exceeding 10 mm). The heating length should be less than one coil. After welding, it should be ground smooth. During gas welding, the welded area should undergo local low-temperature annealing. 4. Spring surface treatment generally involves phosphating, but other treatments are also possible. When zinc or cadmium plating is required, hydrogen embrittlement relief must be performed after electroplating. After hydrogen relief, pull 3% (no fewer than 3 pieces) for retesting and setting treatment; no fractures are allowed during retesting. Springs must be cleaned of surface dirt, salt marks, and oxide scale, using methods such as sandblasting or gasoline cleaning, but acid pickling must not be used. 5. The pressing 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 pressing, 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 too large, the spring is prone to bending deformation. If one spring breaks during pressing, the others must be reprocessed.

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