German mkd springs mkd models mkd prices

mkd 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), a flat force-deflection curve, and no need for preloading. 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, and ensures stable product quality. It can also be designed as a nitrogen spring system to operate as part of the mold, enabling constant pressure and delayed action within the system. It is an ideal new-generation elastic component with flexible performance.

mkd spring mechanical principle

A ring spring consists of outer rings with inner conical surfaces mating with inner rings with outer conical surfaces. The number of outer ring pairs is determined by the load magnitude and deformation requirements. Ring springs are commonly used in applications with limited space requiring strong damping. A ring spring comprises many pairs of inner and outer rings; if damaged or worn, individual rings can be replaced rather than the entire assembly, making repair easier and more economical. Due to significant friction on the contact surfaces when the outer and inner rings slide relative to each other along the mating cones, the axial force during loading is balanced by surface pressure and friction. This effectively reduces the effect of the axial load, thereby increasing the spring stiffness. During unloading, friction hinders the recovery of elastic deformation, effectively reducing the spring force. The characteristic curve of a ring spring during one loading and unloading cycle is OABO; without friction, it would be OC. During unloading, the characteristic curve starts from point B rather than point E due to elastic hysteresis, resulting in a reduction. Ring spring: A spring composed of alternating stacked washer-like spring steel rings, with outer rings having an inner conical surface and outer cylindrical surface, and inner rings having an inner cylindrical surface and outer conical surface. The number of inner and outer ring pairs in a ring spring is determined by the load it bears and the required deformation.

mkd spring material

Disc springs are mostly manufactured from cold-rolled or hot-rolled strip steel, sheet metal, 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 can also be used. Performance requirements for disc spring materials include high ultimate strength, yield limit, elastic limit, and fatigue limit after heat treatment, along with high impact toughness, plasticity, and a high yield-to-tensile strength ratio. To meet these requirements, high-quality cold-rolled or hot-rolled steel strips or sheets 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 has better hardenability, temper stability, and impact toughness than 60Si2MnA, but 50CrVA is more expensive and suitable for applications with high fatigue requirements.

mkd spring features and applications

Features: Compared to ordinary compression or extension springs, its spring force is very constant, providing a nearly linear force output. This ensures that the product does not vary due to changes in spring force during use. In narrow and elongated spaces, it minimizes space usage, enhancing possibilities for aesthetic product design. Constant force spring applications: Lift fans, LCD monitors, sliding windows and doors, supermarket automatic checkout counters, motor brush holding devices, cables, stapler springs, power tools, car ashtrays, locomotive brush accessories, medical devices, mobile phone holders, etc.

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