JB/T 8110.2-1999 This standard is a revision of JB/T 8110.2-95 "Crane Rubber Buffer". During the revision, only editorial changes were made according to relevant regulations, and the main technical content has not changed: This standard is part of the JB/T 8110 "Crane" series of standards. This series of standards includes the following two parts: JB/T 8110.1-1999 Crane Spring Buffer JB/T 8110.2-1999 Crane Rubber Buffer This standard specifies the structural type, basic parameters and technical requirements of rubber buffers. This standard is mainly applicable to bridge and gantry cranes, and can also be used for other cranes. This standard was first issued on June 20, 1985 as GB 6164.2-85 and adjusted to JB/T 8110.2-95 in April 1996. JB/T 8110.2-1999 Crane rubber buffer JB/T8110.2-1999 Standard download decompression password: www.bzxz.net

JB/T 8110.2—1999
This standard is a revision of JB/T8110.2-95 "Main technical content of cranes has not changed.
Rubber buffer". Only editorial changes were made to the original standard during the revision. This standard is part of the JB/T8110 "Crane buffer" series of standards, which includes the following two parts: JB/T8110.1-1999 Crane spring buffer JB/T8110.2--1999 Crane rubber buffer This standard replaces JB/T8110.2--95 from the date of implementation. Appendix A of this standard is the appendix of the standard
This standard is proposed and managed by the National Technical Committee for Standardization of Cranes. The responsible drafting unit of this standard: Taiyuan Heavy Machinery (Group) Company. The main drafters of this standard: Zhao Yonghua, Wang Shoucheng, Cui Zhenyuan. 410
1 Scope
Machinery Industry Standard of the People's Republic of China
Rubber buffer
Crane
Rubber buffer for cranes
This standard specifies the structural type, basic parameters and technical requirements of rubber buffers. This standard is mainly applicable to bridge cranes and gantry cranes, and can also be used for other cranes. 2 Referenced standards
JB/T 8110.2-1999
Replaces JB/T8110.2---95
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB191--1990 Pictorial symbols for packaging, storage and transportation
GB/T528-1992 Determination of tensile properties of vulcanized rubber and thermoplastic rubber GB/T531--1992 Test method for Shore A hardness of vulcanized rubber GB/T 3512-1983
Test method for hot air aging of rubber
GB/T 13306-1991#
GB/T 13384-1992
General technical conditions for packaging of electromechanical products
3 Definitions
This standard adopts the following definitions.
3.1 Buffer capacity: The energy stored when the rubber elastic body reaches the compression deformation under the maximum working load, expressed in W. 3.2 Buffer stroke: The compression deformation of the rubber elastic body under the maximum working load, expressed in S. 3.3 Buffer force: The maximum working load allowed by the rubber elastic body, expressed in P. 4 Structural type and basic parameters
For the structural type, basic parameters and main dimensions of the buffer, please refer to the provisions of Figure 1 and Table 1. Approved by the State Bureau of Machinery Industry on June 28, 1999 and implemented on January 1, 2000
HX-100
HX-160
HX-250
HX-315
HX-400
HX-630
HX-1000
HX-1600
HX-2000
HX-2500
Capacity W
Stroke S
JB/T 8110.2—1999
Rubber buffer
Bolt specifications
M10×30
M10×30
FM12X35
M12X35
M16X40
M16×40
M16×45
M16X45
M20X50
M20X50
M20×50
M20×50
M20×50
5 Model and marking example
Model indication method
HX - 40
5.2 Marking example
JB/T 8110. 2
Rubber buffer with buffer capacity W=0.40kN·m, marked as: 1999
Buffer capacity, kN·cm
Rubber buffer code
Buffer HX-40JB/T8110.2-1999
Technical requirements
When the ambient temperature is (-30~+55)C, the buffer should be able to work normally. 6.1
Rubber elastomers should not come into contact with oil, acid, alkali and other harmful chemicals. The physical and mechanical properties of the rubber materials selected for rubber elastomers should comply with the provisions of Table 2. Table 2
Breaking strength
Elongation at break
Shore A hardness
Hot air aging coefficient (70×72h)
Permanent deformation at break
The dimensional deviation of rubber elastomers should comply with the provisions of Table 3. Size
>10～20
>20～30
>30～50
>50～80
>80～120
>120～180
>180～250
≥18 MPa
≥450%
67 degrees ± 3 degreesbzxz.net
Allowable deviation
±1% of size
6.5 Rubber elastic body shall not have delamination, cracks, sponginess, lack of glue, lack of sulfur and other phenomena, and its surface shall not have bubbles, bright scars, dents and other defects that affect performance and appearance.
6.6 The structural type and main dimensions of rubber elastic body are detailed in Appendix A (Standard Appendix). Test methods and inspection rules
The physical and mechanical properties tests of rubber elastic materials shall be carried out in accordance with the following standards: 7. 1
JB/T 8110.2—1999
a) The breaking strength, elongation at break and permanent deformation at break shall be in accordance with the provisions of GB/T528; b) The hardness shall be in accordance with the provisions of GB/T531;
c) The aging coefficient shall be in accordance with the provisions of GB/T3512. 7.2 The physical and mechanical properties of rubber elastic materials shall be tested once for each batch. If any one of the items fails, double the test pieces shall be taken for re-inspection of the unqualified items. If only one piece fails after the re-inspection, the whole batch of rubber materials shall be unqualified. 7.3 Each rubber elastic body shall be inspected item by item in accordance with the requirements of 6.5. 7.4 Each rubber elastic body shall be inspected for external dimensions in accordance with the provisions of Appendix A. The number of random inspections shall not be less than 2% and shall not be less than 3 pieces. If the inspection fails, double the sample shall be taken for re-inspection; if it still fails after re-inspection, the entire batch shall fail. 7.5 Each buffer shall be inspected for various dimensions and shall comply with the provisions of Table 1 and Appendix A. 7.6 The manufacturer shall issue a certificate of conformity for buffers that pass the inspection. 8 Marking, packaging, transportation and storage
8.1 Each buffer shall have a product label fixed in a conspicuous position, and the requirements shall comply with the provisions of GB/T13306. The label shall indicate at least the following contents:
a) Product model;
b) Product name;
c) Buffer capacity;
d) Manufacturer name;
e) Date of manufacture.
8.2 In addition to complying with the relevant provisions of GB191 and GB/T13384, the following matters should be noted in the packaging, storage and transportation of buffers: a) The packaging box should be marked with words such as oil, acid and alkali proof; b) It should be stored in a well-ventilated warehouse, away from heat sources and light sources more than 1m; c) It should not come into contact with oil, acid, alkali and other harmful chemicals; d) The rubber elastic body must be in a free state. 414
JB/T 8110.2-1999
Appendix A
(Appendix to the standard)
Structural type and size of rubber elastic body
A1 The structural type and size of rubber elastic body are shown in Figure A1 and Table A1. d | 500
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