German sogefi springs, sogefi models, sogefi prices

sogefi spring is a new type of elastic component that uses high-pressure nitrogen as the working medium. It features compact size, high spring force, long stroke, smooth operation, precision manufacturing, long service life (one million cycles), flat force curve, and no need for pre-loading. It performs tasks that are difficult for conventional elastic components such as metal springs, rubber, and air cushions. It simplifies mold design and manufacturing, facilitates mold installation and adjustment, extends mold service life, ensures stable product quality, and can be designed as a nitrogen spring system to operate as part of the mold, allowing convenient implementation of constant pressure and delayed action within the system. It is an ideal new-generation elastic component with flexible performance.

sogefi spring installation and removal

Hydraulic hand pallet trucks are widely used in production. During maintenance of their pressure oil pumps, we found that the pressure spring responsible for returning the pump's piston rod and the truck's pressure arm to their original positions has a wire diameter of n, with a stored elastic force reaching 1000N. This makes its installation and removal extremely difficult, often delaying troubleshooting and directly impacting production schedules. Previous measures taken were ineffective. Therefore, I designed the pressure spring installation/removal tool shown in Figure 1. The tool consists of a lower pressing rod 1, pressure blocks 10, connecting pins 14, nuts 1, spherical washers 12, an upper pressing rod 13, a positioning sleeve 16, and rods. To operate, rotate the nut 11 to the appropriate position so that the cylindrical head claw of the lower pressing rod 1 contacts the truck body 2. The two pressure blocks 10 press symmetrically against the washer 6. Rotate the compression nut n, which pulls the tie rod 15, causing the upper pressing rod 13 and lower pressing rod 1 to move relative to each other, thereby compressing the pressure spring. When the washer 6 clears the cylindrical pin 7, the pressure wheel axle 9, pressure wheel 8, and cylindrical pin 7 can be removed. Then, loosen the nut 11, remove the installation/removal tool, and take out the pressure spring to allow disassembly, inspection, and repair of the pressure oil pump. The positioning sleeve 16 on the tool is a critical component. During manufacturing, one end features an internal spherical surface with a slot-shaped hole in the middle, while the other end is an inclined flat surface, forming an interference fit with the pressing rod. It must maintain good contact with the spherical washer 12 and the ball head of the rod 15. The pressure block 10 and connecting pin 14 have a clearance fit, requiring flexible rotation. The connecting pin 14 and upper pressing rod 13 have an interference fit. The connecting shaft 18 and pressing rod have a clearance fit.

sogefi spring classification

1) Torsion springs are springs that withstand torsional deformation. Their working part is also closely wound into a helical shape. The ends of torsion springs are processed into various shapes of torque arms rather than hooks. Torsion springs use the lever principle, twisting or rotating elastic materials with softness and high toughness to store significant mechanical energy. 2) Extension springs are helical springs that withstand axial tensile forces. When not under load, the coils of extension springs are generally tightly closed with no gap. 3) Compression springs are helical springs that withstand axial compressive forces. The cross-section of the material used is mostly circular, but rectangular and multi-strand steel wires are also used. Springs generally have equal pitch. 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 compression springs. When subjected to external loads, the spring contracts and deforms, storing deformation energy. 4) Progressive springs adopt a design with inconsistent wire thickness and coil density. The advantage is that under low pressure, the section with a lower spring rate absorbs road undulations, ensuring riding comfort. When pressure increases to a certain level, the thicker section of the spring supports the vehicle body. The disadvantage of this spring is indirect handling feel and poor precision. 5) Linear springs have consistent wire thickness and coil density from top to bottom, with a fixed spring rate. This design allows vehicles to achieve more stable and linear dynamic responses, facilitating better vehicle control by the driver. They are mostly used in performance-oriented modified cars and racing vehicles. The downside is reduced comfort. 6) Short springs are shorter and thicker than original factory springs. Installing short springs effectively lowers the vehicle's center of gravity, reduces body roll during cornering, makes cornering more stable and smooth, and improves cornering handling. However, original factory shock absorbers are damped for comfort, so the combination of short springs and original shock absorbers is not very stable. They cannot effectively suppress the rebound and compression of short springs. Driving on bumpy roads causes an uncomfortable bouncing sensation. Over time, the service life of the shock absorbers will be significantly shortened, and oil leakage may occur. Of course, these conditions are relative; daily driving will not cause such severe damage. Avoid aggressive driving, as original factory shock absorbers cannot withstand high-load pressure.

sogefi spring compensation method for controlling springback

The compensation method for controlling springback involves controlling the geometric shape and dimensions of the working parts of the mold based on the direction and magnitude of the springback of the bent part, thereby compensating for the springback after bending. For example, for U-shaped parts with large bending angles, the end face of the punch or the surface of the stripper plate can be made arc-shaped, or the punch and die can be made with inclined surfaces at a certain angle. Thus, the deformation generated at the arc or inclined areas during unloading can compensate for the springback deformation of the two corners. Extending this, the bending compensation method can bend workpieces that are difficult to bend using conventional methods. For the shape shown in Figure 8, both sides are tightly closed with no forming space. Using deformation springback and correction compensation methods, bending is possible.

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