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Springs have various shapes and structures depending on their use. According to the shape can be divided into two types of straight spring and bending spring, according to the shape of the plate can be divided into
Rectangular, trapezoidal, triangular and staged, shaped, etc.
Spring feature editing
The characteristics of the spring leaf are that it is easy to bend in only one direction, the minimum stiffness plane, and has a large tensile stiffness and bending stiffness in the other direction. Therefore, the leaf spring is very suitable for use as a sensing device or a sensor in an automatic device, an elastic support, a positioning device, a flexible connection, and the like.
Spring plate application
According to the characteristics of the material applied to the operating mechanism of different environments, the spring sheet is widely used in various contact devices, and the most used is the straight-cantilever type sheet spring with the simplest shape. The contact pads must have low resistance and therefore be made of bronze.
The role of the leaf spring for measurement is to change the force or displacement. If the fixed structure and the carrying method can ensure the working length of the spring is not changed, the stiffness of the leaf spring is constant in the small deformation range, and if necessary, the nonlinear characteristics can also be obtained, for example, the spring is pressed onto the limiting plate or the adjusting screw. , change its working length.
Spring sheet production technical requirements
1. The radius of the bending section. Most springs are bent when they are formed. If the radius of curvature of the curved portion is relatively small, these portions are subject to great stress. Therefore, if you want to avoid bending part of the greater stress, the design should be bent at least five times the thickness of the plate.
2. Stress concentration at the notch or hole. The spring sheet often has stepped portions and openings, and stress concentration occurs at the step where the dimensions change drastically. The smaller the hole diameter is, the larger the board width is, and the larger this stress concentration factor is.
3. Spring shape and dimensional tolerances. The sheet springs are often stamped and processed, and the shape and size suitable for stamping are selected in the design. At the same time, the dimensional tolerances such as springback during bending and deformation during heat treatment must be fully taken into account.
The requirements for the heat treatment of the spring sheet should be put forward according to the performance requirements. The hardness after heat treatment can generally be determined between 36 and 52 HRC.
Spring sheet material
The spring plate may be selected from the group consisting of phosphor bronze, tin bronze, 65mn, 55Si2Mn, 60Si2MnA, 55SiMnVB, 55SiMnMoV, 60CrMn, 60CrMnB, 302, 316, and the like.