7.10 Springs Flashcards
Why do springs need testing?
Springs need testing due to potential overheating, corrosion, fatigue, and to ensure they meet specified mechanical properties
Common reasons include exposure to elements, high temperatures, and loss of strength or temper.
What are the methods used to inspect and test springs?
Methods include:
* Overheating check
* Corrosion check
* Fatigue check
* Static extension check
* Load/extension check
These methods follow maintenance manuals and manufacturer guidelines.
What does blueing indicate in spring inspection?
Blueing indicates overheating and loss of temper/strength
It is identified by blistering of surface protection and change of color in the metal.
What is pitting in the context of spring inspection?
Pitting is a form of corrosion that reduces the load capacity of the spring
It occurs on static springs and can lead to severe loss of fatigue strength when combined with cyclic loading.
What is checked to assess fatigue in springs?
Fatigue is checked by comparing springs against figures or graphs to determine their condition
Checks are performed at scheduled intervals or on an opportunity basis.
What is static measurement in spring inspection?
Static measurement, or free length measurement, involves measuring the length of the unloaded spring
The measurement is compared to the manufacturer’s published dimensions.
What is the purpose of a load or deflection check?
The load or deflection check assesses the spring’s serviceability under compressive, tensile, or torsional loading
This check uses a special test rig to load the spring and measure deflections.
Fill in the blank: Overheating is identified by _______.
[blistering of the surface protection and change of color of the metal]
True or False: Springs generally require frequent maintenance.
False
Springs typically require little to no maintenance unless exposed to harsh conditions.
What happens if a spring fails any inspection checks?
If a spring fails any checks, it must be replaced with a serviceable item
This is crucial to ensure safety and functionality.
