1 Scope
This part of GB/T 1239 specifies the technical requirements, test methods, inspection rules, packaging, marking, transportation, and storage requirements for cold coiled helical torsion springs with circular sections.
This part is applicable to cold coiled helical torsion springs with circular sections (hereinafter referred to as springs), with a diameter of greater than or equal to 0.5mm.
This part is not applicable to springs with special requirements.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 1239. For dated references, subsequent amendments to (excluding corrections to), or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest editions apply to this part.
GB/T 1805 Nomenclature of springs
GB/T 4357-1989 Carbon spring steel wires (neq JIS G3521:1984)
GB/T 18983 Oil-hardened and tempered steel wire for mechanical springs (GB/T 18983-2003, ISO/FDIS 8458-3:1992, MOD)
GB/T 21652 Copper and copper alloy wire
JB/T 7944 Coiled helical springs - Sampling inspection
YB(T) 11 Stainless steel wires for spring
YB/T 5311 Carbon spring steel wire for significant use
YS/T 571 Copper-beryllium alloy wires
3 Terms and definitions
For the purposes of this part of GB/T 1239, the terms and definitions given in GB/T 1805 together with the following apply.
3.1
test torque
allowable maximum torque (load), Ts, of the spring during inspection of spring characteristics, in N?mm
3.2
test bending stress
allowable maximum bending stress of material, σs, in MPa
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Structural types
5 Technical requirements
6 Test methods
7 Inspection rules
8 Packaging, marking, transportation and storage
Annex A (Informative) Legends
