When checking the disc spring, just pay attention to these aspects!

A disc spring is a conical ring-shaped disk that bears axial loads. Generally, the thickness of the disk is constant, and the load is evenly distributed on the inner edge of the upper surface and the outer edge of the lower surface. Disc springs are usually made of spring steel and can withstand static loads, impact loads, or dynamic alternating loads, meeting strict requirements for fatigue life and load loss.

Advantages of Disc Springs

Disc springs have a short stroke, small deformation, and high load capacity.

Compared to other types of springs, disc springs have a higher space utilization rate.

Different combinations of disc springs can achieve the desired load characteristic curve.

Disc springs can use various special materials and surface coating methods.

Disc springs are easy to maintain and replace, with high economic safety.

Durable

Disc springs are generally used as damping and vibration isolation components in mechanical equipment, bridge shock absorption, high-speed rail, high-cost subways, and high-rise buildings. The performance advantage of disc springs lies in their ability to produce a huge elastic effect with very little deformation. Disc springs are generally high-strength springs. As the usage of disc springs increases, the quality and performance testing of disc springs have become a common concern for related enterprises, buyers, and construction parties.

Due to the different shape and performance of disc springs compared to ordinary springs, the specific testing items are slightly different. The provisions in the national standard GB/T 1972-2005 "Disc Springs" can be referenced. It is worth mentioning that there is also a standard for disc springs, namely JB/T 3812-2015 "Disc Springs for Mine Hoists and Mine Winches" which belongs to industry standards.

The testing items for disc springs are divided into material testing, size testing, mechanical performance testing, surface testing, and other testing items.

Material testing items: chemical composition analysis, elastic modulus testing, plate, slab, and blank quality certificates.

Size measurement: diameter, thickness, free height limit deviation, H0-0.75h0 height load limit deviation.

Mechanical performance testing items: fatigue testing, relaxation testing, creep testing, deformation capacity, hardness, decarburization testing.

Determination of loading characteristics and unloading characteristics of combined disc springs.

Surface testing items: roughness, burrs, cracks, surface anti-corrosion performance, surface strengthening performance.

Other testing items: heat treatment performance, strong pressure treatment performance.

It should be noted that the quality judgment rules for disc springs are evaluated based on defect classification. They are mainly divided into three major defect detection items: A, B, and C. A-type defect detection items mainly include hardness, fatigue, and decarburization indicators. B-type defect detection items mainly include H0-0.75h0 height load, inner diameter, outer diameter, and deformation indicators. C-type defect detection items include thickness, free height, surface quality, and surface roughness indicators.