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Checking the quality of springs
At each stage of production, the characteristics of the process and parameters of the springs are monitored. to identify possible deviations from the specified requirements for the process and product. In this article, we will talk about the main methods of control.
Quality control methods
The rules for acceptance and methods for assessing the quality of compression springs are regulated by the Quality Assurance Plan for manufactured products. Visual inspection allows you to determine the presence of scratches, chips, traces of corrosion
To identify small cracks, flaw detection is carried out, its types:
- Magnetic. The springs are magnetized and then immersed in a special mixture, this allows you to see all existing external defects.
- Luminescent. A special composition is applied to the surface of the products and illuminated. The luminescent layer allows you to see even small damage to the surface.
The dimensions of the compression springs comply with established standards. During the production process, the following are controlled:
- spring height,
- number of coils
- outer and inner diameter
- perpendicularity of end planes
Hardness testing methods
To test the hardness of the material from which the product is made, a steel ball is pressed into it. The force and duration of the impact are regulated by the standard.
Testing on cycle loading machines.
The final characteristic of the spring is its cyclic durability on a specialized stand in various modes according to the requirements of the standard or the customer's design documentation.