JB/T 8987-2017_English: PDF (JB/T8987-2017)
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The specification of AgCu alloy wire (strip) for commutators
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JB/T 8987-2017
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| JB/T 8987-1999 | English | 70 |
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The specification of AgCu alloy wire for commutators
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| Standard ID | JB/T 8987-2017 (JB/T8987-2017) | | Description (Translated English) | The specification of AgCu alloy wire (strip) for commutators | | Sector / Industry | Mechanical & Machinery Industry Standard (Recommended) | | Classification of Chinese Standard | K14 | | Classification of International Standard | 29.120.99 | | Word Count Estimation | 9,992 | | Date of Issue | 2017-11-07 | | Date of Implementation | 2018-04-01 | | Older Standard (superseded by this standard) | JB/T 8987-1999 | | Drafting Organization | Anping Feichang Electrical Alloy Co., Ltd. | | Administrative Organization | National Electrical Alloy Standardization Technical Committee | | Regulation (derived from) | Ministry of Industry and Information Technology Bulletin 2017 No.48 | | Summary | This standard specifies the technical requirements, test methods and acceptance rules for silver-copper alloy wire (belt). | | Standard ID | JB/T 8987-1999 (JB/T8987-1999) | | Description (Translated English) | The specification of AgCu alloy wire for commutators | | Sector / Industry | Mechanical & Machinery Industry Standard (Recommended) | | Classification of Chinese Standard | K14 | | Word Count Estimation | 4,463 | | Date of Issue | 1999-08-06 | | Date of Implementation | 2000-01-01 | | Quoted Standard | GB/T 466-1982; GB/T 467-1982; GB/T 4340-1984; GB/T 5121.1-1985; GB/T 5586-1985; JB/T 5351-1991 | | Adopted Standard | IEC 60356-1971; NEQ; JIS C2801-1995; NEQ | | Drafting Organization | Beijing Institute of Electrical Technology and Economy | | Administrative Organization | National Standardization Technical Committee for Electrotechnical alloy | | Summary | This standard specifies: silver-copper alloy wire the technical requirements, test methods and acceptance criteria. |
JB/T 8987-2017
MECHANICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 29.120.99
K 14
Registration number: 61109-2018
Replacing JB/T 8987-1999
The specification of AgCu alloy wire (strip) for
commutators
ISSUED ON: NOVEMBER 07, 2017
IMPLEMENTED ON: APRIL 01, 2018
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Product variety and code ... 4
4 Technical requirements ... 5
4.1 Raw materials ... 5
4.2 Appearance ... 5
4.3 Dimensions and limit deviation ... 6
4.4 Chemical composition, mechanical-physical properties ... 7
4.5 Delivery status ... 7
5 Test methods ... 7
5.1 Appearance ... 7
5.2 Dimension ... 7
5.3 Chemical composition ... 7
5.4 Conductivity ... 7
5.5 Density ... 8
5.6 Hardness ... 8
5.7 Tensile strength and elongation at break ... 8
6 Inspection rules ... 8
7 Marking, packaging, transportation, storage ... 8
7.1 Product’s marking ... 8
7.2 Packaging ... 9
7.3 Transportation ... 9
7.4 Storage ... 9
References ... 10
The specification of AgCu alloy wire (strip) for
commutators
1 Scope
This standard specifies the product variety and code, technical requirements,
test methods, inspection rules, marking, packaging, transportation, storage of
silver-copper alloy wire (strip).
This standard applies to the production, inspection, acceptance of silver-copper
alloy wire (strip). Silver-copper alloy wire (strip) is used to manufacture silver-
copper commutator. The silver-copper commutator is mainly used in low-power
motors for power tools, household appliances, other industrial appliances.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at
room temperature
GB/T 4340.1 Metallic materials - Vickers hardness test - Part 1: Test method
GB/T 5121.1 Methods for chemical analysis of copper and copper alloys -
Part 1: Determination of copper content
GB/T 5121.19 Methods for chemical analysis of copper and copper alloys -
Part 19: Determination of silver content
GB/T 5586 Test methods for essential property of electrical contact materials
JB/T 5351-2014 Electric contact material for vacuum switch - Test methods
of essential property
3 Product variety and code
According to the different silver content, the product varieties and product codes
of the silver-copper alloy wire (strip) are as shown in Table 1 and Table 2.
4.4 Chemical composition, mechanical-physical properties
The chemical composition and mechanical-physical properties of the silver-
copper alloy wire (strip) are as specified in Tables 1 and 2, respectively.
4.5 Delivery status
The silver-copper alloy wire (strip) is one piece per coil. The weight of each coil
is not less than 50 kg. It may also be agreed between the supplier and the
purchaser.
5 Test methods
5.1 Appearance
The appearance of silver-copper alloy wire (strip) is visually observed in natural
light.
5.2 Dimension
The diameter of the silver-copper alloy wire is measured by a gauge which has
an accuracy of not less than 0.02 mm. The thickness of the silver-copper alloy
strip is measured by a gauge which has an accuracy of not less than 0.005 mm.
The width is measured by a gauge which has an accuracy of not less than 0.02
mm.
5.3 Chemical composition
5.3.1 The total content of copper and silver shall be determined in accordance
with the provisions of GB/T 5121.1.
5.3.2 The silver content is determined by atomic absorption spectrophotometry
according to the provisions of GB/T 5121.19.
5.3.3 The oxygen content is determined according to 3.4 of JB/T 5351-2014. It
is sampled from wire blank.
5.4 Conductivity
According to the provisions of 3.3 of JB/T 5351-2014, determine the
- Supplier’s name, product name:
- Specifications, silver content:
- Batch number, net weight [in kilograms (kg)];
- Date, standard executed by product.
7.1.2 Each coil of silver-copper alloy wire (strip) shall be accompanied by a
certificate of conformity. The certificate includes:
- Supplier’s name, material name (code), specifications;
- Batch number, weight, number of pieces, standard executed;
- Silver content, oxygen content, conductivity, density, hardness;
- Date of inspection, conclusion of inspection;
- Inspector’s seal (or code).
7.2 Packaging
Each coil of silver-copper alloy wire (strip) is wrapped by a soft material, to
prevent bumping of the surface of the material.
7.3 Transportation
During transportation of product, it shall take moisture-proof and rain-proof
measures.
7.4 Storage
The product shall be stored in a dry, ventilated, acid-free indoor environment.
......
JB/T 8987‐1999
Translated English of Chinese Standard. JB/T8987‐1999
Wayne Zheng et al.
JB
K 14
INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
The Specification of AgCu Alloy Wire for
Commutators
ISSUED ON. AUGUST 6, 1999
IMPLEMENTED ON. JANUARY 1, 2000
Issued by. China Mechanical Industry Bureau
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Product Variety and Code ... 4
4 Technical Requirements ... 4
5 Test Methods ... 5
6 Inspection Rules ... 6
7 Marking, Packaging, Transportation and Storage ... 7
Foreword
This standard is drafted for the AgCu commutator segment material that is used for motor
commutator installed on electric tools, household appliances and other industrial electrical
equipment. The technical specification of this standard is established and based on the
requirements of AgCu commutator segment to the materials specified in the "Dimensions for
Commutators and Slip-rings" (IEC 60356-1971) and the Japanese industrial standard
"Commutator Bars" (JIS C 2801-1995). This standard also makes reference to the
commutator manufacturer's enterprise standards in industrially-advanced countries and the
actual situation of AgCu material applied to commutator products in China in the last decade.
This standard lists the oxygen content as an independent indicator; and makes stricter
requirements than the above-mentioned standards, as the oxygen content directly affects the
cold workability of AgCu material. Because the conductivity varies with cold working rate
and heat treatment state, the conductivity indicator of AgCu wires involved in this standard
during supply cannot represent the conductivity of commutator segment. Therefore, this
standard specifies that the conductivity of wires at annealed state acts as the basis of
evaluation.
This standard is voluntary. Since the issuance and implementation, the ordering and
inspection of AgCu commutator segment materials shall comply with this standard. For many
pure copper commutators currently used in electric tools in China, it may also use the AgCu
alloy wires specified in this standard to fabricate the commutators.
This standard was proposed by and is under the jurisdiction of the National Standardization
Technical Committee of Electrical Alloy.
Responsible drafting organizations of this standard. Beijing Electric Comprehensive
Technology Economics Research Institute, and Anping Electric Alloy Factory.
Participating drafting organization of this standard. Rui'an Electric Alloy Materials Factory.
Chief drafting staffs of this standard. Guo Liping, Chen Miaonong, Du Manyin, Zhao Jifeng,
Zhang Xiulan, and Li Qingmin.
This standard is first-time issued.
Beijing Electric Comprehensive Technology Economics Research Institute is in charge of the
interpretation of this standard.
The specification of AgCu Alloy Wire for Commutators
1 Scope
This standard specifies the technical requirements, test methods, inspection rules and the like
for AgCu alloy wires.
AgCu alloy wires specified in this standard are applicable to the manufacture of AgCu
commutators which are mainly used for the electric tools, household appliances and the small
power motors of other industrial electrical equipment. The AgCu alloy wires specified in this
standard may replace the commutator segment materials of pure copper commutators.
2 Normative References
The following normative documents contain provisions which, through reference in this
standard, constitute provisions of this standard. At time of publication, the editions indicated
were valid. All the standards will be revised, all parties coming to an agreement according to
this standard are encouraged to study whether the latest editions of the following standards
are applicable.
GB/T 466-1982 Classification of Copper
GB/T 467-1982 Electrolytic Copper
GB/T 4340-1984 Metallic Materials - Vickers Hardness Test
GB/T 5121.1-1985 Methods for Chemical Analysis of Copper - The Electrolytic Method
for the Determination of Copper Content
GB/T 5586-1985 Test Method for Essential Property of Electric Contact Material
JB/T 5351-1991 Test Method for Basic Properties of Contact Materials of Vacuum
Switches
3 Product Variety and Code
The product variety and code of AgCu alloy wires are listed in Table 1, according to the
different silver contents.
4 Technical Requirements
5.1.3 The analysis of oxygen content shall be carried out with those specified in 3.4 of JB/T
5351. And samples shall be taken from wire billets.
5.2 Determination of I.A.C.S conductivity
The determination of the conductivity of wire billets shall be carried out according to those
specified in 3.3 of JB/T 5351.
5.3 Determination of the density
The determination of density of wire shall be carried out according to those specified in GB/T
5586.
5.4 Determination of the hardness
The determination of Vickers hardness shall be carried out according to GB/T 4340. During
the determination, apply a load of 196.1 N. Horizontally place the tested AgCu alloy wire.
Measure at six positions, among which at least five positions shall be in accordance with
those specified in Table 1 in 4.1 of this standard.
5.5 Determination of hot hardness
Place the finished AgCu alloy wire in the chamber-type electric furnace or tube-type
resistance furnace and heat for 1h at 300 ± 15°C. Cool AgCu alloy wire together with the
furnace to the room temperature. Then conduct the hardness determination according to the
requirements stated in 5.4 of this standard.
5.6 Appearance inspection
Inspect the appearance of AgCu alloy wires with the naked eyes.
5.7 Inspection on dimensions and permissible dimension deviation
Select corresponding measuring tools according to the diameter dimension and its deviation
determined by the supplier and purchaser through negotiation.
6 Inspection Rules
6.1 The technical supervision department of the supplier shall conduct the
end-of-manufacturing inspection of AgCu alloy wire products by batches. And fill in the
product warranty and product qualification certificate. The products manufactured with the
same-batch of materials, same-process, and containing the same-silver content shall be
regarded as a batch.
6.2 Each batch of products shall be inspected for their appearance and diameter dimension
coil by coil.
6.3 For each batch of products, one coil of wire shall be sampled for inspection of the silver
content, oxygen content, conductivity, density, and hardness. If it fails in the inspection, the
inspection may be carried out furnace by furnace.
6.4 The silver content inspection shall be carried out furnace by furnace.
6.5 When the material manufacturer, grade or process has been changed, not only the items
specified in 6.2 and 6.3 of this standard shall be inspected but also shall the hot hardness be
inspected.
6.6 The purchaser may conduct quality inspection on the received products. If the
inspection result has discrepancy with the quality certificate provided by the supplier, it shall
be proposed to the supplier within 2 months upon the receipt of the products. And it be settled
through negotiation by the supplier and the purchaser. If any dispute still exists, it shall be
judged by the arbitration organization, i.e. the relevant ministry-level material detection
centers or higher agency.
7 Marking, Packaging, Transportation and Storage
7.1 Product marking
Each coil of wire shall be equipped with a label as the product mark. The contents of label
shall include.
a) Manufacturer's name;
b) Product name;
c) Product code;
d) Weight, kg;
e) Wire diameter;
f) Production date / manufacturing batch number and furnace No..
7.2 Each coil of wire shall be accompanied with quality certificate of which the contents
include.
a) Manufacturing batch number and furnace No.;
b) Silver content, oxygen content, conductivity, density and hardness;
c) Manufacturer's name;
d) Production date;
e) Inspector's stamp (or code).
7.3 Each coil of wire shall be wrapped with soft materials to prevent the wire surface from
being bumped.
7.4 Proper damp proof and rain-proof measures shall be taken during transportation.
7.5 The products shall be stored in a dry, well-ventilated indoor environment without acid
and alkali atmosphere.
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