JB/T 8817-1998 JB/T 8817-1998 Technical requirements for brake friction pads for construction machinery JB/T8817-1998 Standard download decompression password: www.bzxz.net

JCS 53.100
Machinery Industry Standard of the People's Republic of China
JB/T 8817—1998
Construction machinery
Technical conditions for brake friction pads
Construction machinery-Brake Jinings-Technical specifications1998-09-30Promulgated
National Machinery Industry Bureau
1998-12-01Applied
JB/T8817-1998
This standard was proposed and approved by the Construction Machinery Standardization Technical Committee of the Ministry of Machinery Industry. The originating units of this standard are: Dajin Construction Machinery Research Institute of the Ministry of Machinery Industry, Shanghai Renfeng Friction Material Factory. The main drafters of this standard are Dun Chengshan and Qi Mingfei. Mechanical Industry Standard of the People's Republic of China
Construction machinery-Brake linings-Technical specifications 1 Scope
JB/T88171998
This standard specifies the technical requirements, test methods, inspection and supervision rules, marking, packaging, storage and transportation of dry and mixed brake linings for construction machinery:
This standard is applicable to dry and mixed brake linings for construction machinery. The marking of brake linings for other types of vehicles can be used as a reference. 2 Reference standards
The provisions contained in the following standards shall be cited in this standard and constitute the provisions of this standard. When this standard is issued, the latest version shall be effective. All standards will be reviewed and all parties using this standard shall consider the possibility of using the latest version of the standard. GB1040—7U
G01041-79
GB2B2B87
GB5763-86
JB393785
J/T 8813-1998
JC/T527-93
JC/T $2R -91
3 Technical requirements
3. 1 Basic requirements
Test method for tensile strength of plastics
Test method for compression strength of plastics
Remote batch inspection counting oil machine program and list (applicable to reverse batch inspection) Automobile brake seals!
Automobile brake pad density test method
Bulldozer rotary measuring belt
Friction material burnout test method
Friction material test method
Engineering machinery brake pads (hereinafter referred to as friction pads) shall comply with the provisions of this standard and be manufactured according to the specified procedures and standard drawings and technical documents.
3.2 Physical quality
The friction pads shall not have defects such as scratches, delamination, bulging, warping, distortion, etc. that affect their use. 3.3 The recommended materials for friction pads of similar quality are shown in Table 1.
Forward-type brake pads
Forward-type friction pads
Industrial Bureau 183 approved full
approved material shop
silk stone ground weaving belt
production of tree glands out of prison
quick start rubber tree in the single
1998-12-01 implementation
3.4 physical and chemical properties
JH/T8817-1998
the physical and chemical properties of Kusu tablets are shown in Table 2. Table 2bzxz.net
tensile strength
compression strength
propyl langke material
village material burning type
yellow steel wire content
3.5 rate of exchange performance
lang-style Kusu tablets
2445×11
..4x-1. X5
R9~·55
The friction performance of the friction tool meets the requirements of Table 3. The friction coefficient is ≤2.5×10*
6 pieces
Asbestos eucalyptus cavity
319. 6x rot
2368.6×10
3.6 In general, the service life of the wiper shall not be less than 600 times. 4 Test methods
4.1 Appearance inspection
Use sound and pressure to check the blister of the wiper. Use tester to check the stripe, scar, delamination, warping, etc. Use special tools and measure the external dimensions of the base. 4.2
The determination of compressive strength shall be carried out in accordance with the provisions of GB1040. 4.33
4.4 The determination of strength and width shall be carried out in accordance with the provisions of GB1011. 4.5 The determination of density shall be carried out in accordance with the provisions of GB39.37. .6 The determination of the falling materials shall be carried out in accordance with the provisions of JC 528, and the determination of the loss on ignition shall be carried out in accordance with the provisions of JCT 527. 4.7 The determination of the inductance of yellow steel wire shall be carried out in accordance with the following method: 4.8 225.4×1n5 2349.0×10 ... Take out the repaired brass from the dryer and cool it to room temperature. Separate the brass manually. Weigh the brass, the stone and the residue respectively. Calculate the percentage of weight. 4.9 The determination of the wear coefficient and the wear rate shall be carried out in accordance with the provisions of GB5763: The friction plate shall be kept in the test oil for at least 24 hours before the full test. During the combustion test, the test oil shall be dripped continuously on the sample car to prevent the oil from flying out of the test plate. 4.1 The service life of the friction plate shall be tested according to the requirements of J/T8813. 5 Inspection rules 5.1 Factory inspection JK/T B817-1598 The friction plate shall be inspected and qualified by the manufacturing inspection department before it can be released. Factory inspection items include appearance and quality of the blade.
9.2 Type inspection
5.2. The type inspection items of the blade shall comply with the provisions of Table 4. The sampling method shall comply with the provisions of GB2B23, and a single sampling plan shall be adopted. The inspection level shall be 1. The quality level can be determined according to the provisions of Table 4 or negotiated between the supply and demand parties. Table 4
Single salary, wear resistance, external furnace quality
Tensile strength, mechanical strength, tooth change, internal soluble matter loss, yellow silk content.
Appearance size
5.2.2 During the inspection, if the number of unqualified items is equal to or less than the qualified number of 15, the batch production certificate shall be issued. Marking, packaging, storage and transportation control
6.1 Marking
6.1.! The product mark, manufacturer's name (or registered trademark), place of origin, postal code and date of production are printed on the product. 1.2 The product specifications, manufacturer's name (or registered trademark), place of origin, postal code, product quantity and date of production are printed on the four sides of the product packaging box. In addition, the words "Put with care" and "Get wet" are printed on the left and right sides of the packaging box. 6.2 Packaging
6.2.1 The films should be tightly and neatly packed into clean, durable foil or wooden boxes. 6.2.2 Each packaging box is allowed to contain products with the bottom of the packaging box, and a certificate of conformity shall be attached. Each box shall not exceed 30, 6.3 Storage
The films should be placed in a ventilated and dry room and should not be exposed to moisture, heavy pressure, collision or corrosion by acid and alkali substances. 6.4 Transportation
During transportation, the films shall not be damaged by the environment.
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