Stress detection method and detection system for coil spring structure

Abstract

The invention discloses a stress detection method of a coil spring structure and a detection system thereof. The method includes the following steps: positioning the coil spring to be tested on a dynamometer; the dynamometer applies a load to the coil spring to compress the coil spring to a predetermined test position; scans the whole coil spring under load with a 3D scanner According to the shape of the coil spring, the point cloud model of the coil spring is obtained; based on the point cloud model of the coil spring, the parameters required to calculate the structural stress of the coil spring are obtained through image processing; according to the parameters, the structural stress of the coil spring at the predetermined test position is obtained by calculation . The invention can quickly and accurately test the structural stress of the coil spring.

Description

technical field [0001] The present invention relates to a stress detection technology of a coil spring. Background technique [0002] Coil springs are generally used as buffer energy storage parts in various fields, such as coil springs for automotive suspension systems. The structural stress of the coil spring is a very important performance index parameter in the design and development process of the coil spring. The size of the stress determines the choice of the coil spring material and the fatigue life of the spring. There are usually two ways to test the stress of the coil spring structure: metal paste resistance strain gage test and CAE structure simulation. Both stress testing methods have certain limitations, the main limitations are described below: [0003] Although the metal-pasted resistance strain gauge test method can accurately detect the structural stress of the coil spring when it is loaded, it is difficult to achieve full coverage detection due to the di...

AI Technical Summary

Problems solved by technology

[0003] Although the metal paste resistance strain gauge test method can accurately detect the structural stress of the helical spring when it is loaded, it is difficult to achieve full coverage detection due to the different stresses of the helical spring at each point, and the test time of this method is longer. Unable to get structural stress quickly

Although the CAE structural simulation method can quickly and comprehensively obtain the structural stress of the coil spring, due to the simplification of the simulation model and boundary conditions during the simulation calculation, and at the same time such as the suspension spring, it is difficult to obtain the vibration isolation pad used for assembly with the spring Due to the material properties of the material, the structural stress obtained by the CAE structural simulation method is different from the actual one.

Images