40/2/3 Spring Germany durovis Model 40/2/3 Price

40/2/3 springs are helical springs that withstand axial tensile force. Extension springs are generally manufactured from round cross-section material. When not under load, the coils of an extension spring are usually closed together with no gap. Many different terminal devices or "hooks" are used to ensure the source of tensile force 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 typically under a certain degree of tension even when there is no load. This initial tension determines how tightly the extension spring is coiled when there is no load.

40/2/3 Spring Applications

Extension springs, also known as helical extension springs, generally have uniform pitch and a circular cross-section. They can be used in many occasions, such as production assembly, testing, R&D, and maintenance. Extension springs occupy an important position in the global market and are widely used in fields such as national defense, marine, computer, electronics, automotive, mold, medical, biochemistry, aerospace, railway, nuclear power, wind power, thermal power, engineering machinery, mining machinery, construction machinery, and elevators.

40/2/3 Spring Classification

1) Torsion springs are springs that withstand torsional deformation. Their working part is also closely wound into a helical shape. The end structure of a torsion spring is processed into various shapes of torsion arms, rather than hooks or loops. Torsion springs utilize the lever principle, twisting or rotating elastic materials with softness and high toughness to possess significant mechanical energy. 2) Extension springs are helical springs that withstand axial tensile force. When not under load, the coils of an extension spring are usually closed together with no gap. 3) Compression springs are helical springs that withstand axial compressive force. The material cross-section used is mostly circular, but rectangular and multi-strand steel wires 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 load, the spring contracts and deforms, storing deformation energy. 4) Progressive springs. This type of spring adopts a design with inconsistent thickness and density. The advantage is that when the pressure is not high, the part with a lower spring constant can absorb road undulations, ensuring riding comfort. When the pressure increases to a certain extent, the thicker part of the spring plays a role in supporting the vehicle body. The disadvantage of this type of spring is that the handling feel is not direct, and the precision is poor. 5) Linear springs. The thickness and density of linear springs remain unchanged from top to bottom, and the spring constant is a fixed value. Springs with this design allow vehicles to obtain more stable and linear dynamic responses, which is beneficial for drivers to better control the vehicle. They are mostly used in performance-oriented modified cars and competitive vehicles. The downside is that comfort is affected. 6) Short springs. Short springs are shorter and thicker than original factory springs. Installing short springs can effectively lower the vehicle's center of gravity, reduce body roll during cornering, make cornering more stable and smooth, and improve the vehicle's cornering handling. However, the damping setting of original factory shock absorbers tends towards comfort, so the combination of short springs and original factory shock absorbers is not very stable. It cannot effectively suppress the rebound and compression of short springs. When driving on bumpy roads, there will be an uncomfortable jumping sensation. In the long run, the life of the shock absorber will be greatly shortened, and oil leakage may occur. Of course, these conditions are relative. Daily driving will not cause such severe damage, and aggressive driving should be avoided as much as possible, after all, original factory shock absorbers cannot withstand high-load pressure.

40/2/3 Spring Manufacturing Process

1) Cold forming process capability for one-time automation. Cold forming machines have developed to 12 claws. Steel wire within the range of (0.3～14) mm can be formed in one go on a 8-claw forming machine. Development direction of forming process equipment: (1) Increase forming speed; the main development trend is to increase the forming speed of the equipment, i.e., production efficiency; (2) Improve equipment durability by enhancing the precision of equipment parts and strengthening heat treatment effects; (3) Add length sensors and laser rangefinders to implement automatic closed-loop control of the manufacturing process for CNC forming machines. 2) Cold forming process range capability. Large wire diameter spring coiling machines have a maximum specification of 20mm, =2000MPa, winding ratio 5. The cold forming process for variable diameter or constant diameter Minic-Block springs and eccentric springs still has limitations. 2) Hot forming process speed capability. In China, forming in the (9~25) mm specification is only available with CNC2-axis hot spring coiling machines, with a maximum speed of 17 pieces per minute. There is a large gap compared to developed countries. 2) Control capability of hot forming process for large springs. Due to the presence of only CNC2-axis hot spring coiling machines, there are three fewer directions of action for shape control, resulting in poor precision; moreover, there are no automatic bar rotation control and adjustment mechanisms, so the level and capability of the hot coiled spring forming process are relatively low. Therefore, the precision level and surface oxidation and decarburization level of the springs are also relatively low.

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