German vdf federn springs vdf federn models vdf federn prices

vdf 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 together with no gap. Many different end fittings 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, whereas 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.

vdf federn spring surface treatment

1) Black oxide treatment: This surface treatment provides a black finish; black oxide is applied more for aesthetic improvement than for corrosion resistance. 2) Chrome plating: Chrome plating is primarily a treatment method for carbon steel products, mainly intended to increase corrosion resistance. 3) Oil impregnation: Oil impregnation is the standard treatment method for carbon steel parts, intended to prevent rust during transportation and storage. 4) Passivation: Passivation is a cleaning method for stainless steel materials. 5) Phosphate coating: Phosphating offers better corrosion resistance than black oxide. 6) Ultrasonic cleaning: This is the standard surface treatment method for stainless steel materials. 7) Vibratory deburring: To eliminate sharp edges on the product.

vdf federn spring composition

A ring spring is a type of compression spring composed of several inner and outer rings with tapered surfaces. Under axial load P, significant normal pressure is generated between the contact surfaces of the inner and outer rings, causing the diameter of the inner ring to decrease and the diameter of the outer ring to increase. Due to these changes in the diameters of the inner and outer rings, the length of the spring is shortened. When the external force is removed, since the taper angle b of the rings is greater than the friction angle, the spring restores its original dimensions under the action of elastic internal forces. When a ring spring bears axial P, significant friction is generated between the tapered contact surfaces of the inner and outer rings, dissipating a large amount of energy; at this time, the force and deformation remain linearly related. During the loading process, the external force P equals the sum of the spring's internal elastic force and the friction force. ABO represents the unloading process, which includes two stages: the AB stage and the BO stage. The AB stage indicates the situation where the load decreases, and the spring's elastic internal force overcomes static friction, gradually restoring the spring to its original state. The inner and outer rings of ring springs are made of high-quality carbon steel or wear-resistant alloy steel. Each ring is first roll-formed to the required shape to improve its load-bearing capacity, and then heat-treated. Ring springs are heavy-duty springs with significant buffering and shock-absorption capabilities (the ratio of area OABO to OACO can reach 60～70%). They are commonly used in buffering devices for heavy vehicles, artillery, and aircraft landing gear.

vdf federn spring classification

1) ISO international standard type: ISO gas springs are the most common typical type of gas spring. All technical parameters comply with the ISO11901 international standard for gas springs and China's national standards. Type B gas springs also comply with the gas spring standards of companies such as FORD-WDX3560 (Ford), GM-M-150 (General Motors), and Renault (Renault). 2) Compact structure type: The compact structure type is also called Type J gas spring. It is one of the product series of gas springs, with the full name being Type J compact structure gas spring. Type J compact structure gas springs are a type highly favored by mold designers. Compared with the B series of gas springs, they have a shorter cylinder base length, resulting in a shorter overall length, which can reduce the design height of the mold. They are one of the preferred types of gas springs for mold applications. 3) Ultra-compact type: This is the model with the shortest base length among gas springs worldwide. At the same time, its outer diameter is one size smaller than other types of gas springs (except for Type T extra-slim structure type), but the piston rod diameter is the same, making it compact yet powerful. Type C gas springs perform no worse than ISO standard type gas springs in all aspects when the required working stroke is not too long. 4) Extra-slim structure type: This is the most compact type in terms of cylinder diameter among gas springs. It features a piston seal design, and its outer diameter is even smaller than that of the ultra-compact type. The working stroke of the Type H gas spring series generally does not exceed 50mm, and its performance in all aspects is no inferior to that of Type C gas springs.

Weidou Intelligent Technology specializes in selling German vdf federn compression springs, vdf federn extension springs, vdf federn helical springs, vdf federn wave springs, vdf federn constant force springs, vdf federn torsion springs, vdf federn bending springs, vdf federn disc springs, vdf federn ring springs, vdf federn leaf springs, vdf federn torsion bar springs, vdf federn tension springs, vdf federn retaining rings, vdf federn tension springs, vdf federn die springs. vdf federn are original imports from Germany. Customers are welcome to inquire and place orders.