Search result: GB/T 4074.3-2024 (GB/T 4074.3-2008 Older version)
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Test methods of winding wires - Part 3: Mechanical properties
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Winding wires -- Test methods -- Part 3: Mechanical properties
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Test methods for winding wires-- Part 3: Mechanical properties
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Methods of test for enameled wires--Elongation test
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| Standard ID | GB/T 4074.3-2024 (GB/T4074.3-2024) | | Description (Translated English) | Test methods of winding wires - Part 3: Mechanical properties | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K12 | | Classification of International Standard | 29.060.10 | | Word Count Estimation | 38,312 | | Date of Issue | 2024-04-25 | | Date of Implementation | 2024-11-01 | | Older Standard (superseded by this standard) | GB/T 4074.3-2008 | | Drafting Organization | Shanghai Cable Research Institute Co., Ltd., Tongling Jingda Special Electromagnetic Wire Co., Ltd., Henan Huayang Electrical Technology Group Co., Ltd., Jinbei Electrical Electromagnetic Wire Co., Ltd., Shenyang Hongyuan Electromagnetic Wire Co., Ltd., Luxiao Technology Co., Ltd., Shandong Saite Electric Co., Ltd., Zhejiang Hongbo Technology Co., Ltd., Shanghai Guolan Testing Co., Ltd. | | Administrative Organization | National Wire and Cable Standardization Technical Committee (SAC/TC 213) | | Proposing organization | China Electrical Equipment Industry Association | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
GB/T 4074:3-2024: Test methods for winding wires Part 3: Mechanical properties
ICS 29:060:10
CCSK12
National Standards of People's Republic of China
Replaces GB/T 4074:3-2008
Winding wire test methods
Part 3: Mechanical properties
(IEC 60851-3:2023, Winding wires-Test methods-
Released on 2024-04-25
2024-11-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
Introduction IV
1 Range 1
2 Normative references 1
3 Terms and Definitions 1
4 Test method 6: Elongation 1
4:1 Elongation at break 1
4:2 Tensile strength 1
5 Test method 7: Rebound 2
5:1 Overview 2
5:2 Round wire with a conductor nominal diameter greater than or equal to 0:080 mm and less than or equal to 1:600 mm 2
5:3 Round and flat wires with a nominal conductor diameter greater than 1:600 mm 4
6 Test Method 8: Flexibility and Adhesion 5
6:1 Overview 5
6:2 Round bar winding test 5
6:3 Tensile test (applicable to enameled round wire with nominal conductor diameter greater than 1:600 mm) 7
6:4 Snap-break test (applicable to enameled round wire with nominal conductor diameter less than or equal to 1:000 mm) 7
6:5 Peel test (applicable to enameled round wire with nominal conductor diameter greater than 1:000 mm) 7
6:6 Adhesion test 9
7 Test method 11: Scratch resistance (applicable to enameled round wire) 9
7:1 Overview 9
7:2 Test Principle 10
7:3 Test equipment 10
7:4 Test procedure 10
8 Test method 18: Thermal bonding (applicable to enameled conductors with a nominal diameter greater than 0:050 mm and less than or equal to 2:000 mm)
Round wire and enameled rectangular wire) 11
8:1 Overview 11
8:2 Adhesion of vertical spiral coils 11
8:3 Twisted coil bond strength 14
8:4 Thermal bonding of enameled rectangular wire 17
Appendix A (Informative) Bonding strength of heat-bonded enameled wire 19
A:1 Calculation of temperature of twisted coil specimen 19
A:2 Determination of heating time 19
Appendix B (Informative) Friction Test Method 24
B:1 Overview 24
B:2 Test method A: Static friction coefficient test method 24
B:3 Test method B: First test method for dynamic friction coefficient 24
B:4 Test method C: Second dynamic friction coefficient test method (applicable to conductors with a nominal diameter greater than or equal to 0:050 mm and
Enameled round wire less than or equal to 1:600 mm) 25
B:5 Test method D: Friction measurement by twisted wire pair method 26
Reference 32
Preface
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents"
Drafting:
This document is part 3 of GB/T 4074 Winding Wire Test Methods: GB/T 4074 has been published in the following parts:
--- Part 1: General provisions;
--- Part 2: Dimensional measurement;
--- Part 3: Mechanical properties;
--- Part 4: Chemical properties;
--- Part 5: Electrical properties;
--- Part 6: Thermal properties;
--- Part 7: Test method for determining the temperature index of enameled winding wire;
--- Part 8: Test method for determination of temperature index of enameled winding wire - Rapid method;
--- Part 21: High frequency pulse voltage resistance:
This document replaces GB/T 4074:3-2008 "Test methods for winding wires Part 3: Mechanical properties" and is compatible with GB/T 4074:3-2008
Compared with the previous version, in addition to structural adjustments and editorial changes, the main technical changes are as follows:
--- Changed the adhesion test method (see 6:6, 5:5 of the:2008 edition);
--- Changed the scope of application of the thermal bonding test (see Chapter 8, Chapter 7 of the:2008 edition);
--- Changed the scope of the enameled flat wire thermal bonding test (see Chapter 8, Chapter 7 of the:2008 edition);
This document is equivalent to IEC 60851-3:2023 "Test methods for winding wires - Part 3: Mechanical properties":
The following minimal editorial changes were made to this document:
--- In order to coordinate with the existing standards, the name of the standard is changed to "Test methods for winding wires Part 3: Mechanical properties":
Please note that some of the contents of this document may involve patents: The issuing organization of this document does not assume the responsibility for identifying patents:
This document was proposed by the China Electrical Equipment Industry Association:
This document is under the jurisdiction of the National Technical Committee for Standardization of Wire and Cable (SAC/TC213):
This document was drafted by: Shanghai Cable Research Institute Co:, Ltd:, Tongling Jingda Special Magnet Wire Co:, Ltd:, Henan Huayang Electric Science and Technology Co:, Ltd:
Technology Group Co:, Ltd:, Jinbei Electric Magnet Wire Co:, Ltd:, Shenyang Hongyuan Magnet Wire Co:, Ltd:, Roshow Technology Co:, Ltd:, Shan
Dongsaite Electric Co:, Ltd:, Zhejiang Hongbo Technology Co:, Ltd:, and Shanghai Guolan Testing Co:, Ltd:
The main drafters of this document are: Zhang Zhao, Su Baoxin, Du Mingxin, Kuang Meizhou, Chai Na, Lu Yong, Chen Lei, Yan Qinhua, Zhu Ranran, Pan Guoliang, Li Fu:
The previous versions of this document and the documents it replaces are as follows:
---First published in 1983 as GB/T 4074:3-1983;
---First revised in:1999, and incorporated GB/T 4074:3~4074:10-1983, GB/T 4074:14-1983,
Contents of GB/T 4074:27-1983, GB/T 1343:3~GB/T 1343:7-1984;
---Revised for the second time in:2008;
---This is the third revision:
introduction
Winding wire is one of the main raw materials for power, motor, electrical appliances, home appliances, electronics, communications, transportation, power grid, aviation and other fields:
It has a wide range and covers many fields, and has become an important mechanical industrial product:
GB/T 4074 Winding Wire Test Methods is the only test method standard for measuring winding wire products in China: It is very important for product testing and market regulation:
It plays an important role in both market and product improvement:
GB/T 4074 aims to establish the test method standards for the performance of different types of winding wire products and is intended to consist of the following 9 parts:
--- Part 1: General provisions: The purpose is to establish the terms, definitions and general test principles for winding wire test methods:
--- Part 2: Dimensional measurement: The purpose is to establish test methods for measuring the dimensions of different products of winding wire:
--- Part 3: Mechanical properties: The purpose is to establish test methods for the mechanical properties of different types of winding wire products:
--- Part 4: Chemical properties: The purpose is to establish test methods for the chemical properties of different types of winding wire products:
--- Part 5: Electrical properties: The purpose is to establish test methods for the electrical properties of different types of winding wire products:
--- Part 6: Thermal properties: The purpose is to establish test methods for the thermal properties of different types of winding wire products:
--- Part 7: Test method for determining the temperature index of enameled winding wire: The purpose is to establish a method for determining the temperature index of enameled winding wire:
Test procedures:
--- Part 8: Test method for determining the temperature index of enameled winding wire: Rapid method: The purpose is to establish the determination of the temperature index of enameled winding wire:
Rapid test procedure for the sensitivity index:
--- Part 21: High-frequency impulse voltage resistance performance: The purpose is to establish the test method for the high-frequency impulse voltage resistance performance of winding wires:
Winding wire test methods
Part 3: Mechanical properties
1 Scope
This document describes the following test methods for winding wires:
--- Test method 6: Elongation;
--- Test method 7: Rebound;
--- Test method 8: Flexibility and adhesion;
--- Test method 11: Scratch resistance;
--- Test method 18: Thermal bonding:
For terms, definitions, general principles of test methods and a list of test methods for winding wires, refer to IEC 60851-1: This document provides in Annex B
Recommended friction test method:
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document:
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document:
GB/T 4074:2-2024 Winding wire test methods Part 2: Dimensional measurement (IEC 60851-2:2019, IDT)
Note: There is no technical difference between the referenced content of GB/T 4074:2-2024 and the referenced content of IEC 60851-2:1996:
3 Terms and definitions
There are no terms or definitions that require definition in this document:
4 Test method 6: Elongation
4:1 Elongation at break
Elongation is the ratio of the increase in length to the original length, expressed as a percentage:
On an extensometer or tensile testing machine, extend a calibrated wire with a free test length of:200 mm to 250 mm at a rate of (5 ± 1) mm/s:
The straight specimen is stretched to the conductor breaking point, and the ratio of the linear length increment at the time of breaking to the free test length is calculated and expressed as a percentage:
Test three specimens, record three test values, and take the average value as the elongation at break:
4:2 Tensile strength
Tensile strength is the ratio of the breaking force of a conductor to its original cross-sectional area:
On a tensile testing machine, pull a straightened specimen with a free test length of:200 mm to 250 mm at a rate of (5 ± 1) mm/s:
Extend it to the breaking point of the conductor and record the breaking force:
Test three specimens, record the original cross-sectional area and three breaking force test values, and take the average value of the ratio of breaking force to original cross-sectional area as the resistance value:
......
GB/T 4074.3-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.060.01
K 12
GB/T 4074.3-2008 / IEC 60851-3:1997
Replacing GB/T 4074.3-1999
Winding wires - Test methods - Part 3: Mechanical
properties
(IEC 60851-3:1997, IDT)
ISSUED ON: APRIL 23, 2008
IMPLEMENTED ON: DECEMBER 01, 2008
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Test method 6: Elongation ... 6
4 Test method 7: Springiness ... 6
5 Test method 8: Flexibility and adherence ... 9
6 Test method 11: Resistance to abrasion (applicable to enamelled round wire) ... 13
7 Test method 18: Heat or solvent bonding (applicable to enamelled round wire with a
nominal conductor diameter over 0.050 mm up to and including 2.000 mm) ... 14
Annex A (informative) Bond strength of heat bonding wires ... 27
Annex B (informative) Friction test methods ... 33
Foreword
GB/T 4074-2008 “Winding wires - Test methods” consists of 8 parts:
- Part 1: General;
- Part 2: Determination of dimensions;
- Part 3: Mechanical properties;
- Part 4: Chemical properties;
- Part 5: Electrical properties;
- Part 6: Thermal properties;
- Part 7: Test procedure for the determination of the temperature index of enamelled
winding wires (under consideration);
- Part 8: Test procedure for the determination of the temperature index of enamelled
winding wires - Quick-Test method (under consideration).
This Part is Part 3 of GB/T 4074.
This Part is identical to IEC 60851-3:1997 “Winding wires - Test methods - Part 3:
Mechanical properties”, Edition 2.1 (English version), and amendment No. 2 (2003).
For ease of use, the following editorial changes have been made to this Part:
- REPLACE the comma “,” used as a decimal point WITH a decimal point “.”.
This Part replaces GB/T 4074.3-1999 from the date of implementation.
Compared with GB/T 4074.3-1999, the main changes in this Part are as follows:
- LIMIT the adherence test of tape wrapped round and rectangular wires in 5.5.4 TO
only applicable to adhesive tape wrapped wire products;
- DELETE the requirements for solvent bonding and the corresponding instructions
and NOTE 1 in GB/T 4074.3-1999 in Test method 18;
- MODIFY Figure 10 “Test equipment for bond retention of a helical coil”;
- MODIFY suggestive Annex A and suggestive Annex B TO informative Annex A
and informative Annex B.
Annex A and Annex B of this Part are informative annexes.
This Part was proposed by China Electrical Equipment Industry Association.
Winding wires - Test methods - Part 3: Mechanical
properties
1 Scope
This Part of GB/T 4074 specifies the following methods of test:
- Test method 6: Elongation;
- Test method 7: Springiness;
- Test method 8: Flexibility and adherence;
- Test method 11: Resistance to abrasion;
- Test method 18: Heat or solvent bonding.
For definitions, general notes on methods of test and the complete series of methods of
test for winding wires, see GB/T 4074.1.
2 Normative references
The following documents contain the provisions which, through reference in this Part
of GB/T 4074, become the provisions of this Part. For dated references, their subsequent
amendments (excluding corrigendum) or revisions do not apply to this Part. However,
the parties who enter into agreement based on this Part are encouraged to investigate
whether the latest versions of these documents are applicable. For undated reference
documents, the latest versions apply to this Part.
GB/T 4074.1 Winding wires - Test methods - Part 1: General (GB/T 4074.1-2008,
IEC 60851-1:1996, IDT)
GB/T 4074. 2-200 Winding wires - Test methods - Part 2: Determination of
dimensions (IEC 60851-2:1997, IDT)
IEC 61033:1991 Test methods for the determination of bond strength of
impregnating agents to an enamelled wire substrate
ISO 178:2001 Plastics - Determination of flexural properties
After peeling and rotating, the specimen shall be examined for loss of adhesion. If the
coating can be removed from the wire without difficulty (for example with the
thumbnail), it shall be considered to have lost its adhesion even if it has not become
completely detached from the wire.
One specimen shall be tested. It shall be reported, if loss of adhesion is observed.
5.5 Adherence test
A straight piece of wire of about 300 mm length, shall be elongated in accordance with
clause 3 to the percentage specified in the relevant standard.
5.5.1 Enamelled rectangular wire
Before elongation, the coating shall be cut circumferentially through to the conductor
at a point approximately in the centre of the measured length. After elongation, the
specimen shall be examined for loss of adhesion.
One specimen shall be tested. It shall be reported, if loss of adhesion is observed,
measured longitudinally from the cut. If so, the length of loss of adhesion shall be
measured in one direction from the cut. The maximum value observed shall be reported
after examining all sides of the specimen.
5.5.2 Impregnated fibre covered round and rectangular wire
Before elongation, the insulation shall be removed from all but the central 100 mm of
the wire piece. After elongation, the specimen shall be examined for loss of adhesion.
One specimen shall be tested. It shall be reported, if loss of adhesion is observed with
the insulation sliding along the conductor in case of round wire or being detached in
case of rectangular wire.
5.5.3 Fibre covered enamelled round and rectangular wire
Before elongation, the insulation shall be cut circumferentially at two places 100 mm
apart in the centre of the wire piece through to the conductor. After elongation, the
specimen shall be examined for loss of adhesion.
One specimen shall be tested. It shall be reported, if loss of adhesion is observed.
5.5.4 Tape wrapped round and rectangular wire (only applicable to adhesive tape)
Before elongation, the insulation shall be cut circumferentially through to the conductor
at a point approximately in the centre of the measured length. After elongation, the
specimen shall be examined for loss of adhesion.
......
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