German MISUMI springs, MISUMI models, MISUMI prices

MISUMI 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 oscillating half-shafts of the front drive axle. However, torsion bar manufacturing costs are 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 torsion bar surface 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.

MISUMI spring features

1) High stiffness, strong buffering and vibration absorption capability, capable of bearing large loads with small deformation, suitable for applications with limited axial space. 2) Variable stiffness characteristics; this type of spring has a wide range of nonlinear characteristics. 3) Using the same disc springs in different combination methods allows the spring characteristics to vary over a wide range. Combination methods such as face-to-face or stacked arrangements can be adopted, as well as combinations with different thicknesses and numbers of discs. 4) When stacked, for the same deformation, the greater the number of springs, the greater the load. 5) Short stroke, heavy load, small space requirement, convenient combination, easy maintenance and replacement, economical, high safety, and long service life.

MISUMI spring rebound control measures

1) Select materials with good bending performance: use materials with a low yield limit and high elastic modulus as bending parts, to achieve higher bending quality. In addition, the magnitude of thickness tolerance of the blank, the quality of the surface finish and flatness, all have a significant effect on bending springback. For workpieces with high requirements for bending accuracy, the quality of the blank in this regard must also be screened. 2) Select a smaller relative bending radius: a small r/t value indicates a large degree of deformation. Generally, when r/t ≤ 3-5, it is considered that the bending zone of the sheet metal has fully entered the plastic state. A smaller bending radius is beneficial for reducing springback, but an excessively small bending radius will cause cracking in the bending zone. The minimum bending radius for materials provided in references is mainly absolute empirical data, which can serve as a reference basis for sheet metal designers when designing the bending radius of workpieces. 3) Select the required die clearance: V type bending, the clearance value is achieved by high-speed machine tools, and is independent of the die itself. For U type bending, springback decreases as the depth of the die opening increases, and springback decreases as the die clearance decreases. For workpieces with high bending accuracy, the single-side bending clearance can be taken as Z=t; If higher bending accuracy is required, using bending with slight thinning is more effective for reducing springback. Because zero-gap or negative-gap bending can change the stress state of the sheet material, transforming it from ordinary bending to bending with tensile-bending characteristics, so that the inner side of the neutral layer of the blank is in a compressive stress state, thereby placing the entire cross-section of the blank in a tensile stress state in the tangential direction, after unloading, the springback of the inner and outer fibers cancels each other out, reducing springback (Figure 4). Therefore, adopting stretch-bending processes and dies with adjustable gaps is highly beneficial for controlling springback. 4) Design reasonable workpiece shapes: U-shaped bent parts have less springback than V-shaped parts. The workpiece shape is complex, with significant mutual constraint between various sections, making springback difficult. Therefore? -shaped parts have less springback than U-shaped parts. If suitable stiffening ribs are pressed at the bending area, the springback will be even smaller. Therefore, flanging or hemming treatment on bent parts can not only increase stiffness but also reduce springback. 5) Adopt appropriate microstructural states: Materials after work hardening, Large springback in bending. For bent parts with high precision requirements, the blank undergoes work hardening, it should be annealed, and then bent again. Where necessary and permissible, heated bending should be used for workpieces with thicker blanks to eliminate springback. The springback angle in corrective bending is significantly smaller than in free bending, and the greater the corrective force, the smaller the springback. 6) Corrective bending punch shape: This is because the corrective bending force concentrates the punching force in the bending deformation zone, forcing the inner layer of the metal to be compressed, so after the sheet is corrected, both the inner and outer fibers are elongated, and both shorten after unloading. Since the springback tendencies of the inner and outer layers are opposite, the amount of springback will decrease, thereby achieving the goal of overcoming or reducing springback. Therefore, corrective bending is a bending method similar in nature to stretch bending, and its application range appears to be wider. Generally, the punch for corrective bending mostly adopts the shape shown in Figure 5.

MISUMI spring functions and applications

1) Reset function: The spring deforms under external force, and returns to its original state after the external force is removed. Many tools and devices utilize this property of springs for resetting. For example, reset springs are installed on the hinges of many building doors, allowing the door to automatically reset after people enter or exit. This function is also used to manufacture items such as automatic umbrellas and mechanical pencils, which are very convenient. In addition, various buttons and keys cannot do without reset springs. 2) Drive function: Mechanical watches and clockwork toys are driven by tightening the mainspring. When the mainspring is tightened, it undergoes bending deformation and stores a certain amount of elastic potential energy. Upon release, the elastic potential energy is converted into kinetic energy, driving rotation through the transmission device. Toy guns, starter pistols, and military firearms also operate using this property of springs. 3) Buffering function: Springs are installed between the frame and wheels of locomotives and automobiles, utilizing the elasticity of the springs to alleviate vehicle bumps. 4) Vibration and sound generation function: When air flows through the reed holes in harmonicas and accordions, it impacts the reeds, causing them to vibrate and produce sound.

Weidou Intelligent Technology specializes in selling German MISUMI compression springs, MISUMI extension springs, MISUMI helical springs, MISUMI wave springs, MISUMI constant force springs, MISUMI torsion springs, MISUMI bending springs, MISUMI disc springs, MISUMI ring springs, MISUMI leaf springs, MISUMI torsion bar springs, MISUMI tension springs, MISUMI retaining rings, MISUMI tension springs, MISUMI die springs, all original imports from Germany. Welcome customers to inquire and order.