GB/T 1239.1-2009Cold coiled helical springs - Technical specifications - Part 1: Extension springs (English PDF)

1 Scope

GB/T 1239 provisions of this part of the cold rolling cross-section helical tension spring of technical requirements, test methods, inspection rules and packet

Equipment, signs, transportation, storage requirements.

This section applies to cold rolling cross-section helical tension spring (hereinafter referred to as spring), is greater than the cross-sectional diameter of the spring material, etc.

To 0.5mm.

This section does not apply to the special requirements of the spring.

2 Normative references

The following documents contain provisions which, through reference to GB/T 1239 to the present, constitute provisions of this section. For dated reference documents

Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section

Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.

GB/T 1805 spring term

GB/T 4357-1989 carbon spring steel wire (neqJISG3521. 1984)

GB/T 16947 coil spring fatigue testing standard

GB/T 18983 quenching oil - tempered spring steel wire (GB/T 18983-2003, ISO /FDIS8458-3.1992, MOD)

GB/T 21652 Copper and copper alloy wire

JB/T 7944 sampling inspection helical springs

YB (T) 11 stainless steel wire for springs

YB/T 5311 important use of carbon spring steel wire

YS/T 571 beryllium copper wire

3 Terms and symbols

Terminology and symbols used in this part shall comply with GB/T 1805's.

4 structure type

Spring structure type in Table 1.

Table 1

Code schematic end structure type

LI Half ring […]