Standard Test Method for Measurement of Camber, Cast, Helix, and Direction of Helix of Coiled Wire

Importancia y uso:

4.1 The process of coiling wire causes the wire to take on a curvature from the process of being mechanically deformed into a coiled geometry. The curvature in the wire is permanent unless the wire is straightened. It will affect how the coiled wire will react when it is subjected to additional wire forming operations. In addition, residual stresses induced from the coiling operation can cause elastic recoil or spring back in subsequent wire forming operations unless the material is straightened and stress relieved prior to forming. These residual stresses can create wide variations in the dimensions of components and/or parts that have been built using the coiled wire (cast).

4.2 The direction that the wire has been coiled affects how the wire will be taken off of the coil for subsequent wire forming operations (helix direction).

4.3 Lift or spacing between adjacent coils also affects how the wire will be taken off of the coil and can also affect the dimensions of components and/or parts that have been built using the coiled wire due to residual stresses (helix).

Subcomité:

F04.15

Referida por:

F2819-24

Volúmen:

13.02

Número ICS:

77.140.65 (Steel wire, wir ropes and link chains)

Palabras clave:

camber; coil; helix; helix direction;