How to find the spec for a bend in a coil

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SUMMARY

The discussion focuses on determining acceptable bend specifications for coils of wound wire, particularly a 150mm long coil welded to a tube with a maximum bend specification of 1mm. Participants suggest evaluating the coil's performance under load, noting that minor wiggles may straighten out, while significant deformations could lead to failure. The conversation emphasizes the importance of understanding the application of the coil to establish acceptable bend criteria.

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  • Understanding of coil geometry and properties
  • Knowledge of material deformation under load
  • Familiarity with welding techniques for coils
  • Basic principles of mechanical engineering related to bending and buckling
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  • Research coil design specifications for various applications
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Mechanical engineers, product designers, and quality assurance professionals involved in the design and testing of wound wire coils and their applications.

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Howdy folks,
I'm having trouble finding a spec for bends in wound wire i.e. a coil.
For example if you take the coil, say 150mm long and roll it on a flat surface and it deflects from the table in places (wiggles), how does one possibly determine what is an acceptable bend and what isn't? It is welded to a tube, which has a max bend spec of 1mm but its in a coils nature to bend so I am confused. Some are poker straight and some are 'wavy'. Any ideas would be much appreciated,
Thanks
 
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It might help if you told us what this part is or does.
 
Depending on the application, one way to decide might be if it buckles when loaded in compression. Small wiggles should straighten out when it's loaded, but if it's deformed badly enough it might get worse under load and fold in half.
 

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