Belleville commonly used materials allowable stress

Spring at work is often subject to a variable load or impact load, in order to ensure that the spring is capable of long-lasting reliable operation, the material must have a high elastic limit and fatigue limit, and should have sufficient toughness and ductility, and good heat treatability.

The spring material and performance can access manuals, norms and standards (GB/T129.6-92 GB4357-89). Belleville spring steel used:

1: low manganese spring steel

This spring steel (65Mn), compared with the carbon spring steel, the advantage is better hardenability and high strength; drawback is prone to cracking after quenching and hot brittleness. However, because of the cheap price, general machinery commonly used in manufacturing small size of the spring, for example dish lockwashers commonly used in the manufacture of this material.

2: silicon manganese spring steel

This steel (e.g. 60Si2Mn) because the added silicon, so it can significantly improve the elastic limit, and improved tempering stability, which can be at a higher temperature tempering, thereby obtaining good mechanical properties. Silico-manganese spring steel has been widely applied in industry, and is generally used in the manufacture of machinery, automobiles, tractors, disc springs, coil springs.

3: chrome vanadium steel

This steel (e.g. 50CrVA) added vanadium purpose is to refine the tissue, improve the strength and toughness of steel. Milk fatigue and impact resistance of this material, and the longer a reliable working temperature of -40 degrees - 210 degrees, but more expensive. Used for demanding occasions, such as used in the manufacture of aero-engine disc spring adjustment system.

In addition, certain materials such as stainless steel and bronze, with a corrosion-resistant features, The the bronze also have magnetic and conductivity Guchang for the manufacture of chemical equipment or work in the spring in the corrosive medium. The disadvantage is not easy to heat treatment, poor mechanical properties, so rarely used in general machinery.

The choice of materials, consideration should be given to the use of the spring, the degree of importance, the use of conditions (including load nature, size and cycle characteristics, the duration of the work, the working temperature and the surrounding medium conditions), processing, heat treatment, and economic factors. At the same time, we must refer to the existing equipment to use in the spring election to make more material combination.

A wide range of disc springs are replaced by a cylindrical coil spring. Commonly used in heavy machinery, such as presses, and artillery, aircraft and other weapons, as a powerful buffer and damping spring, used as a car with tractor clutch and a safety valve compression spring, as well as energy storage devices for amusement devices. Disadvantages: load deviation is difficult to guarantee. Disc spring, depending on the section shape can be divided into three categories: ordinary disc spring (the cross-sectional shape of a rectangle), with radial grooves of the disc spring, trapezoidal cross-section disc spring. Ordinary disc spring is divided into two types of support surface and support surface; with radial grooves of the disc spring is on the basis of the ordinary disc springs along the radial direction out of a number of evenly spaced slots, the slots can be bore out round the direction of out, you can also open to the internal control direction by the cylindrical; disc spring of the trapezoidal cross section can be divided into the inner edge thickness is greater than the foreign aid thickness and edge thickness is less than the outer thickness of the two categories. The single disc spring deflection and load value often can not meet the requirements, then you can group, composed of the disc spring assembly (column). A typical combination is: superimposed combination of the disc spring complex combination disc spring, disc spring, and other combinations. Compared with the cylindrical coil spring, disc spring has the following characteristics: a load-deformation characteristic curves showed a nonlinear relationship. , Disc springs into a thin shape, easy to form a combination, can implement the building-block assembly and replacement, and thus to the maintenance convenience. With a radial slot disc spring with zero stiffness characteristic. This feature can be applied to the spring force to maintain the basic stability of the occasion in a deformation range requirements. Disc spring vibration absorption performance of not less than the cylindrical coil spring, due to friction between the plate reed and has a larger damping when using composite combination to dissipate the impact energy.