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GB/T 4909.4-2009Test methods for bare wires - Part 4: Torsion test (English PDF)

裸电线试验方法第4部分：扭转试验

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 19, 2009

Implementation date

December 1, 2009

Scope

GB/T 4909.4-2009 is the English-translated version of 裸电线试验方法第4部分：扭转试验.

GB/T 4909.4-2009 is the Chinese standard "Test methods for bare wires - Part 4: Torsion test". Its scope clause reads: GB/T 4909 provisions of this part of the bare wire torsion test test equipment, specimen preparation, measurement procedures, test results and commentary Set and so on.

Profiled conductor body and feature size Rao <=20.00mm (such as contact line, etc.) torsion performance. This section is a predetermined length of the specimen, with its own axis midline twist, twist until it breaks or reaches a predetermined number of times so far.

This section should be used in conjunction with the GB/T 4909.1-2009. Its clauses include test equipment.

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Document preview — GB/T 4909.4-2009

National Standard of the People's Republic of China

ICS: 29.060.10
Classification: K 11
Replacing: GB/T 4909.4-1985

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 Normative references
3 Test Equipment
3.1 Chuck

1 Scope

GB/T 4909 provisions of this part of the bare wire torsion test test equipment, specimen preparation, measurement procedures, test results and commentary

Set and so on.

Profiled conductor body and feature size Rao <=20.00mm (such as contact line, etc.) torsion performance.

This section is a predetermined length of the specimen, with its own axis midline twist, twist until it breaks or reaches a predetermined number of times so far.

This section should be used in conjunction with the GB/T 4909.1-2009.

2 Normative references

The following documents contain provisions which, through reference to GB/T 4909 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 4909.1-2009 Test methods for bare wires - Part 1. General

3 Test Equipment

Torsion testing machine should meet the following requirements.

1 --- positioning chuck;

2 --- spin chuck;

3 --- specimen;

Rao --- shaped cross-sectional interview feature size pieces;

L --- gauge length;

F --- load.

Figure 1 Schematic torsion testing machine

3.1 Chuck

3.1.1 Chuck hardness

Chuck should have sufficient hardness, the clamping jaws hardness 55HRC ~ 65HRC.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Cited by

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Editions of GB/T 4909.4

Edition	Title	Revision	Status
GB/T 4909.4-2009	Test methods for bare wires - Part 4: Torsion test	current edition	Current
GB/T 4909.4-1985	Test methods for bare wires - Part 4: Torsion test	previous edition	Superseded

This page sells the current edition, GB/T 4909.4-2009. Earlier editions are listed for reference only.

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