German HOFER Hochdrucktechnik springs, HOFER Hochdrucktechnik models, HOFER Hochdrucktechnik prices

HOFER Hochdrucktechnik springs are conical disc-shaped. They can be used individually or in series or parallel combinations. They withstand static or dynamic axial loads at the upper inner edge and lower outer edge, deforming under compression until flattened to store energy as a live load. When necessary, they automatically convert into additional compressive load required for sealing, reducing the continuous tightening requirements for gaskets and packing. Disc springs are special springs that are conical in the axial direction and bear loads. After deforming under load, they store a certain amount of potential energy. When bolts loosen, the disc spring releases part of the potential energy to maintain pressure between flange connections to meet sealing requirements. The stress distribution of disc springs decreases uniformly from the inside out, achieving high compensation force with low travel.

HOFER Hochdrucktechnik spring applications

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

HOFER Hochdrucktechnik spring composition

Ring springs are a type of compression spring composed of several inner and outer rings with conical surfaces. Under axial load P, significant normal pressure is generated between the contact surfaces of the inner and outer rings, causing the inner ring diameter to decrease and the outer ring diameter to increase. Due to these changes in diameters, the spring shortens in length. When the external force is removed, since the cone angle b of the rings is greater than the friction angle, the spring restores its original dimensions under elastic internal forces. When ring springs bear axial P, significant friction is generated between the conical contact surfaces of the inner and outer rings, consuming 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 force and friction. ABO represents the unloading process, which includes two stages: the AB segment and the BO segment. The AB segment 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 powerful springs with great 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.

HOFER Hochdrucktechnik spring functions and applications

Functions: 1) Measurement function. We know that within the elastic limit, the extension (or contraction) of a spring is proportional to the external force. Spring scales are made using this property of springs. 2) Clamping function. Observing various electrical switches reveals that one of the two contacts in a switch must be equipped with a spring to ensure tight contact between the two contacts for good conductivity. If contact is poor, the resistance at the contact point increases, generating more heat when current passes through, which can seriously cause the metal at the contact point to melt. The two metal posts of bayonet lamp holders are also equipped with springs for good contact. As for the center metal piece of screw lamp holders and all plug-in metal pieces of sockets, they are spring leaves, whose function is to ensure tight contact between both parties to maintain good conductivity. In cassette tapes, there is a phosphor bronze spring leaf that uses the elastic force generated by its bending deformation to keep the magnetic head in close contact with the tape. In staplers, there is a long helical spring. Its role is, on one hand, to press the staples tightly, and on the other hand, to push the subsequent staples to the front after the foremost staple is ejected, preparing them for comfortable ejection. This allows staples to be automatically pushed to the front one by one until all are ejected. Many machines' automatic feeding and the automatic chambering of bullets in automatic rifles rely on this function of springs. In addition, clothespins, ballpoint pens, and pen cap clips all use the clamping function of springs to attach to clothes. Applications: 1) Bearing vehicle body weight, meaning that most of the vehicle's weight is normally borne by the springs. 2) Mitigating road bumps. Helical springs are buffering elements. When the impact force from the road surface is transmitted to the helical spring via the wheels, the helical spring deforms, absorbing the kinetic energy of the wheels and converting it into potential energy of the helical spring, thereby mitigating the impact of the ground on the vehicle body. However, the helical spring itself does not consume energy. The spring storing potential energy will restore its original shape, converting the potential energy back into kinetic energy. If springs are used alone without damping elements, some light cars would bounce up and down continuously like acrobats on a trampoline after a single impact. In automotive manufacturing, independent suspension axles are divided into two sections. Each wheel is independently installed under the frame by a helical spring. When one wheel bounces, the other wheel is unaffected. The wheels on both sides can move independently, improving the stability and comfort of the car.

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