German paul vieth springs paul vieth models paul vieth prices

paul vieth springs consist of tension springs and connecting springs. The pitch and helix direction of the tension spring and the connecting spring are identical. A special fixture is used to clamp one end of the tension spring and screw it into the connecting spring. The other end of the tension spring is then rotated and fitted onto the other end of the connecting spring. Rotational force is used to screw the connecting spring into the interior of the tension spring, forming the tension spring into a ring spring. The utility model ring spring does not affect the shape and elasticity of the connection part, and the connection is firm, making it suitable for various applications requiring ring springs. A ring spring is composed of alternating stacked washer-like spring steel discs with inner conical and outer cylindrical surfaces, and washer-like spring steel discs with inner cylindrical and outer conical surfaces. The number of pairs of inner and outer rings in the ring spring is determined based on the magnitude of the load it bears and the deformation requirements. Ring springs are applied in situations where space is limited and strong buffering is required.

paul vieth spring influencing factors

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

paul vieth spring measures to control springback

1) Select materials with good bending performance: Using materials with low yield limit and high elastic modulus as bending parts can achieve higher bending quality. In addition, the thickness tolerance of the blank, surface quality, and flatness have a significant impact on bending springback. For workpieces with high bending precision requirements, the quality of the blank in these aspects should 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 may cause cracking in the bending zone. The minimum bending radii for materials provided in references are primarily absolute empirical data, which can serve as a reference for sheet metal designers when designing the bending radius of workpieces. 3) Select the required die clearance: For 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 precision, the single-side bending clearance can be set to Z = t; if higher bending precision is required, adopting bending with slight thinning is more effective in reducing springback. Because zero or negative clearance bending can change the stress state of the sheet metal, transforming it from ordinary bending to bending with tensile-bending characteristics, creating a compressive stress state on the inner side of the neutral layer of the blank, so that the entire cross-section of the blank is in a tensile stress state in the tangential direction. After unloading, the springback of the inner and outer fibers cancels out, reducing springback (Figure 4). Therefore, adopting tensile-bending processes and dies with adjustable clearance is highly beneficial for controlling springback. 4) Design reasonable workpiece shapes: U type bent parts have less springback than V type parts. Complex workpiece shapes with more mutual constraints between parts make springback difficult. Therefore, ? type springback is smaller than U type. If suitable stiffening ribs are pressed at the bending location, springback will be even smaller. Therefore, flanging or hemming treatment of bent parts can both increase stiffness and reduce springback. 5) Adopt suitable microstructure states: Materials after cold work hardening have large bending springback. For bending parts with high precision requirements, if the blank has cold work hardening, it should be annealed before bending. Where necessary and permissible, heating bending should be used for workpieces with thicker blanks to eliminate springback. The springback angle in corrected bending is significantly smaller than in free bending, and the greater the correction force, the smaller the springback. 6) Correct the shape of the bending punch: This is because the corrected bending force concentrates the punching force in the bending deformation zone, forcing the inner layer of the metal to be compressed. After the sheet metal is corrected, both the inner and outer fibers are elongated and will shorten after unloading. Since the springback trends of the inner and outer layers are opposite, the amount of springback will be reduced, thereby achieving the goal of overcoming or reducing springback. Therefore, corrected bending is a bending method similar in nature to tensile bending, and its application range is broader. Generally, the shape shown in Figure 5 is mostly adopted for corrected bending punches.

paul vieth spring features and applications

Features: Compared with ordinary compression or tension springs, its spring force is very constant, capable of outputting a nearly linear spring force, ensuring that the product does not change due to variations in spring force during use. In narrow and long spaces, it can minimize space usage, enhancing possibilities for aesthetic product design. Constant force spring applications: lift fans, LCD monitors, up-and-down sliding doors and windows, supermarket automatic checkout counters, motor carbon brush clamping devices, cables, stapler clockwork springs, power tools, car ashtrays, locomotive carbon brush accessories, medical instruments, mobile phone holders, etc.

Weidou Intelligent Technology professionally sells German paul vieth compression springs, paul vieth tension springs, paul vieth helical springs, paul vieth wave springs, paul vieth constant force springs, paul vieth torsion springs, paul vieth bending springs, paul vieth disc springs, paul vieth ring springs, paul vieth leaf springs, paul vieth torsion bar springs, paul vieth traction springs, paul vieth retaining rings, paul vieth tension springs, paul vieth mold springs, paul vieth original German imports. Welcome customers to inquire and order.