German item spring item model item price

item springs, as elastic elements, are widely used in the suspensions of modern automobiles, including passenger cars, trucks, and off-road vehicles. Compared with leaf springs, torsion bar springs offer a series of advantages: high energy storage per unit mass, which reduces vehicle weight and saves material; since the torsion bar spring is fixed to the frame, it reduces unsprung mass, helping to improve ride smoothness; when applied to the front suspension of front-wheel-drive vehicles, the torsion bar spring can be arranged longitudinally, leaving space for the swinging half-shafts of the front drive axle. However, the manufacturing cost of torsion bars is relatively high, with strict requirements for materials and processes. In addition, torsion bar springs serve only as elastic elements and must be equipped with guiding mechanisms. Torsion bar springs are made of chrome-vanadium alloy spring steel, and their surfaces are very smooth after machining. During use, the surface of the torsion bar must be well protected. Typically, a layer of epoxy resin is applied to the surface of the torsion bar spring, wrapped with a layer of fiberglass cloth, coated with another layer of epoxy resin, and finally coated with asphalt and anti-rust paint to prevent collision, scratching, and corrosion, thereby extending the service life of the torsion bar spring.

item Spring Introduction

Designed based on the principle of moment balance. Within the permissible load displacement, the load moment and the spring moment always remain in balance. For pipes and equipment supported by constant-load hangers, a constant supporting force can be provided during displacement, thus not imposing additional stress on the piping equipment. Constant-load hangers are generally used in places where displacement stress needs to be reduced, such as the suspended parts of power plant boiler bodies, steam, water, flue gas, and air ducts in power plants, burners, as well as in the petroleum and chemical industries where such support is required. It is a mechanical part that works using elasticity. Parts made of elastic material deform under external force and return to their original shape after the external force is removed. Also known as "spring". Generally made of spring steel. Springs come in complex and diverse types. Classified by shape, they mainly include helical springs, spiral springs, leaf springs, and special-shaped springs.

item Spring Selection

A. Selection of spring force: Select the quantity, model, and spring force of each nitrogen spring based on the calculated punching force. Generally, the spring force of the nitrogen spring should be selected by adding an increment of 15%-20% to the calculated punching force, which better matches actual conditions. First, after mold wear, gaps change. Changes in process parameters such as blunt cutting edges, inconsistencies in mold thickness and sheet metal deformation resistance cause changes in workpiece deformation resistance, so allowance should be left in the design of deformation resistance. Second, during charging of nitrogen springs, high-pressure gas inevitably suffers throttling losses, causing a slight decrease in spring force. Third, nitrogen springs have a long service life; after a period of use, there will be certain leakage of high-pressure nitrogen, causing a slight drop in spring force. B. Selection of the number of nitrogen springs: Based on forming requirements, combined with mold structure and the position of force application points, ensure that no eccentric loading occurs during mold operation, while also making mold adjustment convenient. This ensures sufficient service life for nitrogen springs during use. C. Selection of the boost ratio of nitrogen springs: Can be selected based on the characteristic curve of the nitrogen spring and stamping process requirements to determine the model of the nitrogen spring. It is particularly important to determine the boost ratio when stable change in working force, basically constant working force, or large initial force is required. D. Selection of nitrogen spring stroke: Regardless of the process, when selecting nitrogen springs, it is desirable that the total height of the nitrogen spring not be too high to avoid instability and overly complex structures during installation in the mold. Moreover, the larger the stroke, the higher the price of the nitrogen spring, which is especially important for independent nitrogen springs. If a large stroke is indeed required due to process needs, it is recommended to adopt a nitrogen spring seat plate system, which can reduce mold height and improve the stability and reliability of nitrogen springs. Sometimes, for safety and to avoid accidents, a safety stroke of 3-5mm needs to be added when selecting nitrogen springs. Selection of nitrogen spring structural forms: When designers use nitrogen springs in molds, they first need to decide on their structural form. Comprehensive consideration should be given to the stamping process requirements of the required parts, the structural form of the mold, equipment used, working environment, working conditions, mold cost, and adjustment and maintenance factors. A. Independent type: The most widely used is the independent nitrogen spring, which occupies less mold space, is securely placed, and comes in various structural forms. Several different installation forms do not require any accessories. They can be used by directly placing them in the mold. This is the preferred design form for designers today. B. Pipeline connection type: Pipeline connection types are generally applied to large stamping parts and large coverings. It uses high-pressure pipes to connect individual nitrogen springs together, and installs a control instrument so that the spring force of each nitrogen spring in the entire system is equal, thereby integrating the entire system into one, equivalent to an independent nitrogen spring. Thus, a larger spring force and balance of spring force transmission are achieved, improving mold life and ensuring the quality of stamped parts.

item Spring Applications

1) For blacksmiths: Because leaf springs are made of higher quality steel, they are the favorite material for blacksmiths. In countries such as Nepal, Bangladesh, the Philippines, and Pakistan, where traditional blacksmiths still produce a large number of tools, leaf springs from scrapped cars are often used to make tools such as knives. 2) Used in trampolines: Leaf springs have also replaced traditional helical springs in some trampolines (known as soft-edge trampolines), which improves user safety and reduces the risk of concussion. Leaf springs are spaced around the frame with "legs" branching from the base frame to suspend the jumping mat, thereby providing elasticity. 3) Used in clutches: The common "diaphragm" in automotive clutches is a type of leaf spring.

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