This standard specifies the classification, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage, etc. of asbestos friction pads for industrial machinery. This standard applies to dry asbestos friction pads (brake pads, brake bands, clutch facings) for industrial machinery, and also to dry asbestos friction pads for agricultural machinery. Dry non-asbestos friction pads can also be used as a reference. GB/T 11834-2000 Asbestos Friction Pads for Industrial Machinery GB/T11834-2000 Standard download decompression password: www.bzxz.net

ICS.73.080
National Standard of the People's Republic of China
GB/T11834—2000
Asbestos friction linings for industrial machines
Asbestos friction linings for industrial machines2000-04~03issued
implemented on 2000-06-01
issued by the State Quality and Technical Supervision Commission
050928067388
GB/T11834—2000
This standard adopts the Japanese industrial standard JISR3455:1995 "Asbestos brake linings for industrial machinery" in a non-equivalent manner, and revises GB11834-1989 "Asbestos friction linings for industrial machinery". This standard is compared with GB11834-1989, and the following important technical contents have been modified. It is clear that formal non-asbestos friction pads can also refer to this standard. The material of the friction disc of the fixed speed friction tester is changed to HT250, and the hardness is changed to 180~220HB. The friction performance test method directly refers to GB5763-1998 Automobile Brake Lining and GB/T5764-1998 Automobile Clutch Facing.
----The content of the inspection rules is newly written, and the AQL value in the appearance size inspection is changed from the original 6.5 to 4.0. 一The marking and packaging part are modified.
This standard replaces GB11834-1989 from the date of implementation. This standard is proposed by the State Building Materials Industry Bureau. This standard is under the jurisdiction of Hangzhou Brake Material Factory. The drafting unit of this standard: Hangzhou Friction Material Co., Ltd. The main drafters of this standard: Chen Xinyun, Cai Renhua, Cao Hong, Jiang Shilu. This standard was first issued in November 1989. Hangzhou Brake Material Factory is entrusted with the interpretation of this standard. 1 Scope
National Standard of the People's Republic of China
Ashestos friction linings for industrial machines
Ashestos friction linings for industrial machinesGB/T:11834—2000
Replaces GB11834—1989
This standard specifies the classification, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage, etc. of asbestos friction linings for industrial machinery (hereinafter referred to as friction linings).
This standard applies to dry asbestos friction linings (brake linings, brake bands, clutch facings) for industrial machinery, and also to dry asbestos friction linings for agricultural machinery. Dry non-asbestos friction linings can also be adopted by reference. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were valid. All standards are revised.
GB/T2828-
GB5763-19987
GB/T5764
3 Classification
3.1 Classification and code
Revision, parties using this standard should explore the possibility of using the latest version of the following standards. Batch inspection set counting sampling procedure and sampling table (applicable to continuous batch inspection) Pneumatic brake lining (neqJISD4411: 1993) Automobile clutch facing (negJISD43111995S
The classification and
of friction plates shall comply with the provisions of Table 1.
3.2 Basic dimensions
Ordinary soft woven products
Soft molded crystal
Specially processed woven products
Molded or semi-molded products
Semi-metal molded products
3.2.1 The basic dimensions of brake bands and brake pads are expressed in width and thickness. 3.2.2 The basic dimensions of the clutch facing are expressed in terms of outer diameter, inner diameter and thickness. 3.2.3 The basic dimension expression method of special-shaped friction plates shall be agreed upon by both parties. Approved by the State Administration of Quality and Technical Supervision on 2000-04-03 Process Characteristics
By hot mill or vulcanization
By semi-vulcanization
By hot pressing and vulcanization
Brake pad
Brake band
Brake pad
Brake band
Brake pad
Brake band
Brake pad
Clutch pad
2000-06-01 Implementation
3.3 Product Marking
GB/T 11834—2000
3.3.1 The friction plate product marking consists of the product classification code, size and this standard number. 3.3.2 Marking example
a) 100mm wide, 4mm thick Class 2 brake band
ZD2-100X4GB/T 11834—2000
b) 380mm outer diameter, 202mm inner diameter, 10mm thick clutch plate LP3-3-380X202X10GB/T 11834—20004 Technical requirements
4.1 Appearance
4.1.1 The surface processing and inspection of the friction plate shall be agreed upon by the supply and demand parties. 4.1.2 The friction plate surface is not allowed to have cracks, bubbles, delamination and other defects that affect the use. 4.2 Dimensions
4.2.1 The dimensional limit deviations of brake pads (bands) shall conform to the provisions of Table 2, Table 2
Basic size
>30~60
>60~100
100～200
6. 3--10. 0
Limit deviation
Class 1, Class 2, Class 3 No. 1
The dimensional limit deviations of clutch facing plates shall conform to the provisions of Table 3 and Table 4. Table 3
Basic dimensions of outer diameter
>100~250
250---400
Basic dimensions of thickness
>6 3~-10. 6
External diameter limit deviation
Thickness limit deviation
Class 3, No. 2
Inner diameter limit deviation
Thickness difference per piece
GB/T 11834-2000
4.2.3 The dimensional deviation of friction plates with unprocessed surfaces and special-shaped friction plates shall be determined by the supplier and the buyer. 4.3 Friction performance
The friction coefficient () shall comply with the provisions of Table 5. Table 5
Classification
Class 3 No. 1
Class 3 No. 2
Class 3 No. 3
0,30-~0.60
0.30~0. 60
0.30~0.60
0.25~0. 60
The friction coefficient range is included in μ.
Specified friction coefficient to be agreed upon by both parties
Test machine disc rubbing surface temperature,
0. 25 ~ 0. 60
0.25~0.60
0. 25~~0. 60
0.30-0,60
0. 20~0. 60
The allowable deviation (A) of the specified library friction coefficient shall comply with the provisions of Table 6. Table 6
3 Class 1
3 Class 2
3 Class 3
The wear rate (V) shall comply with the provisions of Table 7.
V,10 'cm*/(Nm)
Class 3 No. 1
Class 3 No. 2
Class 3 No. 3
Note, wear rate is not allowed to be negative value
0, 20 ~0. 60
0.20~-0.60
0,20~0,60
0.15~C. 60
Testing machine disk friction surface temperature,
Testing machine disk friction surface temperature,
0. 15--0. 60
4.3.4 After the test, the test piece shall not have cracks, bulges and other defects that affect its use, and the test piece shall not have obvious scratches on the disk friction surface. 4.4 Softness
Softness is applicable to Class 1 products. It can also be applied when users have softness requirements for Class 3 No. 1 products with a thickness of less than 6.3mm. After the softness test, no crack defects that affect the use of the product surface are allowed. 4.5 Bending performance
The bending strength (,) and maximum strain (e) of Class 3 No. 3 products shall comply with the provisions of Table 8. 3
5 Test method
Bending strength N/mm
Maximum strain e, 10-3, mm/mm
5.1 Appearance quality
Use visual inspection method.
5.2 Dimensions
GB/T11834-2000
Allowable value
The width and thickness of the brake pad (belt) and the inner and outer diameters of the clutch facing are measured with an accuracy of 0.The thickness of the clutch face plate is measured with a 0.02mm vernier caliper, and the thickness of the clutch face plate is measured with a micrometer with an accuracy of 0.01mm. The measuring tools used for measuring other dimensions shall be agreed upon by the supply and demand parties. 5.3 Friction performance
Friction performance test shall be conducted in accordance with the provisions of Table 9,
Class 3 No. 1
Class 3 No. 2
Class 3 No. 3
5.4 Softness performance
Pressure of test piece, MPa
Close to the cylinder specified in Table 10 around 180°S
Thickness of product
>6.3~10.0
Highest test temperature.wwW.bzxz.Net
Diameter of cylinder
25 times of thickness of product
5.5 Bending performance shall be conducted in accordance with the provisions of Article 4.4 of GB/T5764-1998. 6 Inspection rules
6.1 Factory inspection items
6.1.1 Appearance inspection.
6.1.2 Dimension inspection.
6.1.3 Friction performance test,
6.1.4 Softness test (applicable to Class 1, Class 3 No. 1). 6.1.5 Bending test (applicable to Class 3 No. 3). 6.2 Batching principle
Reference standard
Article 5.3 of GB57631998
Article 4.3 of GB/T5764
1998
Class 3 No. 1
The actual delivery quantity of friction plates of the same material or specification is considered as one batch. When the batch is too large, it can be divided into several small batches by agreement between the supply and demand parties.
6.3 Sampling method and judgment rules
GB/T11834—2000
6.3.1 The inspection of the appearance and dimensional deviation of the friction plate adopts the random sampling method, and the normal inspection one-time sampling plan is used according to GB/T2828, and the special inspection level is S-4, and the AQL value is 4.0. The sampling quantity required for different batches and the judgment of qualified batches or unqualified batches shall comply with the provisions of Table 11.
151~500
501~1200
1201~10000
Sample size
6.3.2 Performance test According to Table 12, the sample size is randomly sampled. If each sample
is still qualified after the test, the batch of products is considered qualified. If any item is unqualified, double sampling is performed for re-testing. If the test result is qualified, the batch of products is considered unqualified. Purchase and storage
7.1.1 The manufacturer's name or trademark and the year and month of production are printed on the non-positive surface of the friction plate. 7.1.2 The sides of the friction plate packaging box (box or bag) shall be marked with the product name, model and specification, manufacturer name and/or trademark, address, product quantity, specified friction coefficient, inspection and packaging date and this standard number. 7.2 Packaging
7.2.1 The friction plate should be tightly and neatly packed into a clean, dry, sturdy and durable box (box or bag). 7.2.2 Each packaging box (box or bag) should be filled with friction plates of the same model and specification. 7.2.3 Each packaging box (box or bag) should be accompanied by a product certificate. 7.3 Transportation
During transportation, the friction plate should not be damaged or contaminated by oil or water. 7.4 Storage
The friction plate should be stored in a ventilated, dry and flat room. 5
People's Common Benefit
National Standard
Asbestos Friction Plate for Industrial Machinery
G3/ 11834--2G0
Published by China Standards Publishing House
No. 16, Guohebei Street, Fuyimenwai, Beijing
Postal code: 109043
Tel: 68522112
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Book Number: 15566: 1-16842
Production 8.0 yuan
Standard H 415
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