German bachmaier klemmer springs, bachmaier klemmer models, bachmaier klemmer prices

bachmaier klemmer springs are a special type of extension spring, suitable for applications with large elongation and constant load. Constant-force springs consist of spiral metal strips; the inner side of the strip is curved so that each coil wraps tightly around the inner coil. When the metal strip is stretched (twisted), internal stress resists the load force, similar to ordinary extension springs, but the spring rate is nearly constant (zero). See the load/torsion diagram. In use, an ID is typically used to wind this spring tightly onto a drum, with its free end connected to the load, like a counterweight. Alternatively, the free end can be fixed, allowing the spring itself to provide the working force, similar to carbon brushes in electrical devices.

bachmaier klemmer spring influencing factors

Springback includes angular springback and curvature springback, resulting from the combined effect of springback in the bending deformation zone and the non-deformation zone. Many factors influence springback, mainly: (1) material mechanical properties σs, Eo σs higher, E value smaller, bending springback greater; (2) degree of deformation r/t. Under identical conditions, angular springback increases as r/t value increases; curvature springback decreases as r/t value increases; (3) bending center angle α o larger bending center angle α, greater springback angle; (4) die clearance Z. Larger punch-die clearance results in greater springback; (5) bending method. Free bending has large springback, corrected bending has smaller springback, and full-form upsetting bending has the smallest springback; (6) workpiece shape and material microstructure. Complex shapes with more mutual constraint have smaller springback; springback is greater after work hardening; (7) die structure and blank holder force magnitude. Greater blank holder force results in smaller springback after bending.

bachmaier klemmer spring materials

Disc springs are mostly manufactured from cold-rolled or hot-rolled strip steel, plate steel, or forged blanks (forging ratio not less than 3). Common materials include spring steels such as 60S2MA and 50CVA. For thicknesses less than 1.1, high-carbon steel may also be used. Performance requirements for disc spring materials dictate that after heat treatment, they must possess high ultimate strength, yield limit, elastic limit, and fatigue limit, while also requiring high impact toughness, plasticity, and the highest possible yield ratio. To meet these performance criteria, high-quality cold-rolled or hot-rolled steel strips or plates are widely used domestically and internationally. For disc springs with thickness greater than 6 mm, forged blanks are used, primarily consisting of medium-carbon low-alloy spring steels (silicon-manganese or chromium-vanadium spring steels) and high-quality carbon spring steels. Due to the high silicon-manganese content and low chromium-vanadium availability in China, disc springs mainly use 60Si2MnA. Comparing the two, 50CrVA offers better hardenability, temper stability, and impact toughness than 60Si2MnA, but 50CrVA is more expensive, making it suitable for applications with high fatigue requirements.

bachmaier klemmer spring applications

Disc springs are replacing cylindrical helical springs in a wide range of applications. They are commonly used in heavy machinery (such as presses) and weapons like artillery and aircraft as powerful buffer and vibration-damping springs. They serve as clamping springs for automotive and tractor clutches and safety valves, and as energy storage elements in mobile mechanisms. Disadvantage: Load deviation is difficult to guarantee. Disc springs can be classified into three categories based on cross-sectional shape: standard disc springs (rectangular cross-section), disc springs with radial slots, and trapezoidal cross-section disc springs. Standard disc springs are divided into those with support surfaces and those without. Disc springs with radial slots are derived from standard disc springs by cutting several uniformly distributed slots radially; slots can be cut from the inner hole toward the outer diameter or from the outer diameter toward the inner hole. Trapezoidal cross-section disc springs are divided into two types: those with inner edge thickness greater than outer edge thickness, and those with inner edge thickness less than outer edge thickness. Since the deformation and load values of a single disc spring often fail to meet usage requirements, they can be used in groups to form disc spring assemblies (columns). Typical combinations include: stacked disc spring assemblies, compound disc spring assemblies, and other disc spring combinations. Compared to cylindrical helical springs, disc springs have the following characteristics: 1) The load-deflection characteristic curve is nonlinear. 2) Disc springs are thin and easy to assemble into components, allowing modular assembly and replacement, which facilitates maintenance. 3) Disc springs with radial slots exhibit zero-stiffness characteristics. This feature is applicable in situations where the spring force must remain basically stable within a certain deformation range. 4) The vibration absorption performance of disc springs is no lower than that of cylindrical helical springs. When using stacked combinations, friction between disc spring sheets provides significant damping, dissipating impact energy.

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