Search Result of Chinese Standard: 'GB/T 1171-2017'
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Classical V-belt for general drive
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GB/T 1171-2017
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Detail Information of GB/T 1171-2017; GB/T1171-2017
Description (Translated English): Classical V-belt for general drive
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G42
Classification of International Standard: 21.220.10
Word Count Estimation: 13,169
Date of Issue: 2017-02-28
Date of Implementation: 2017-09-01
Older Standard (superseded by this standard): GB/T 1171-2006
Quoted Standard: GB/T 3686; GB/T 11544; GB/T 12833; GB/T 15328
Drafting Organization: Three-dimensional rubber products Co., Ltd., Zhejiang Hongda Rubber Co., Ltd., Wuxi City in the benefits of rubber Technology Co., Ltd., Ningbo Karcher Tape Co., Ltd., Qingdao City Product Quality Inspection Technology Research Institute
Administrative Organization: National Committee on Pulley and Standardization Technical Committee on Friction Belt Transmission (SAC/TC 428/SC 3)
Regulation (derived from): National Standard Announcement No. 4 of 2017
Proposing organization: China Petroleum and Chemical Industry Federation
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee
Summary: This standard specifies the structure, type and marking, requirements, sampling, test methods and marking, labeling, packaging, transportation and storage of ordinary V-belts (hereinafter referred to as V-belts) for general transmission. This standard applies to general V-belts for general mechanical transmissions. This standard does not apply to motor vehicles, motorcycles and other mechanical transmission devices.
GB/T 1171-2017
Classical V-belt for general drive
ICS 21.220.10
G42
National Standards of People's Republic of China
Replace GB/T 1171-2006
General V-belt for general transmission
Published on.2017-02-28
2017-09-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 1171-2006 "General V-belt for general transmission", compared with GB/T 1171-2006, except editorial modification
The main technical changes are as follows.
--- Removed the requirements for adapting the rope structure in the scope of application (see Chapter 1, Chapter 1 of the.2006 edition);
--- Modified the representation of the mark (see 4.2, 3.3 of the.2006 version);
--- Removed the requirements for the bonding strength of the rope in physical properties and its test methods (see 5.3, 5.3 and 7.3 of the.2006 edition);
--- Revised the inspection of the dimensions in the sample (6.1, 6.1 of the.2006 edition);
--- Added a single basic rated power P1 and power increment ΔP1 table (see Appendix A).
This standard was proposed by the China Petroleum and Chemical Industry Federation.
This standard is under the jurisdiction of the National Technical Committee on Pulley and Belt Standardization Technical Committee (SAC/TC428/SC3).
This standard was drafted. Sanlux Co., Ltd., Zhejiang 3D Rubber Products Co., Ltd., Zhejiang Hongda Rubber Co., Ltd.,
Wuxi Zhonghui Rubber Technology Co., Ltd., Ningbo Kaichi Tape Co., Ltd., Qingdao Product Quality Inspection Technology Research Institute.
The main drafters of this standard. Shi Shuixiang, Liu Youliang, Dai Jianqiu, Zhu Shusheng, Ying Jianli, Li Xiaodong.
The previous versions of the standards replaced by this standard are.
---GB 1171-1974, GB 1171-1989, GB/T 1171-1996, GB/T 1171-2006.
General V-belt for general transmission
1 Scope
This standard specifies the structure, type and marking, requirements, sampling, test methods and general markings of ordinary V-belts (hereinafter referred to as V-belts) for general transmission.
Marking, labeling, packaging, transportation and storage.
This standard applies to ordinary V-belts used in general mechanical transmissions.
This standard does not apply to mechanical transmission devices such as automobiles and motorcycles.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 3686 belt drive V-belt and V-ribbed belt tensile strength and elongation test method
GB/T 11544 belt drive ordinary V-belt and narrow V-belt size (base width system)
GB/T 12833 Multi-peak curve analysis in the determination of tear strength and bond strength of rubber and plastic
GB/T 15328 ordinary V-belt fatigue test method without torque method
3 structure
3.1 V belt is divided into edging V-belt and trimming V-belt according to its structure (normal trimming V-belt, toothed trimming V-belt and bottom rubber-cutting V-belt)
Two.
3.2 V belt consists of rubber canvas (top cloth), top rubber, cushion rubber, tensile body, primer, base cloth (base rubber cloth) and so on (see Figure 1).
a) edging V belt b) ordinary trimming V belt
Figure 1 Schematic diagram of V-belt structure
c) toothed trim V-belt d) bottom rubber cloth trimming V-belt
Description.
1---plastic canvas;
2---top cloth;
3---top glue;
4---buffer glue;
5---resistance;
6---base glue;
7--- bottom rubber cloth;
8---backcloth.
Figure 1 (continued)
4 models and markings
4.1 Model
The V-belt should have a symmetrical trapezoidal cross-section with a ratio of height to pitch width of about 0.7, and its model is divided into seven types. Y, Z, A, B, C, D, and E.
Note 1. The trimming tape is indicated by the symbol "X" after the model number.
Note 2. See Appendix A for the selection of V-belt models.
4.2 Marking
An example of a tag for the V band. Take the V-belt according to GB/T 1171, A model with a reference length of 1430mm as an example, which is marked as.
A1430GB/T 1171
The meaning of each element in the mark is as follows;
A --- model is type A;
1430---with a reference length of 1430mm.
Note. According to the negotiation between the supplier and the buyer, the length of the inner circumference can be increased in the mark.
5 requirements
5.1 Appearance quality
The appearance quality of the V belt shall comply with the requirements of Table 1.
Table 1 V-belt appearance quality requirements
V-band category defect name requirements
Wrapped V-belt
Damaged with angled canvas
Bubbling
Glue canvas stitching off
Belt bias
Sponge
The cumulative length of each side of the outer rubber canvas shall not exceed 30% of the length of the belt (the inner rubber canvas shall not have)
Should not have
Trimmed V-belt
Flash
Bubbling
Biased, cracked
Sponge
The top side of the single side flash shall not exceed 0.5mm
Should not have
5.2 size
The reference length limit deviation, exposed height, center distance variation, and matching difference of the V-belt shall comply with the provisions of GB/T 11544.
5.3 Physical properties
The physical properties of the V-belt shall comply with the requirements of Table 2.
Table 2 Physical properties of ordinary V-belts
model
project
Tensile strength/kN
Reference force elongation /%
Wraped V-belt V-belt
Bond strength between cloth and top rubber/(kN/m)
Y 1.2
Z 2.0
A 3.0
B 5.0
C 9.0
D 15.0
E 20.0
7.0
5.0
2.0
5.4 Fatigue performance
The A-type and B-type V-belts have a torque-free fatigue life of not less than 1.0×107 times, and the 24h center-to-center distance change rate is not more than 2.0%.
6 sampling
6.1 The V-belt shall be inspected for appearance quality one by one, and the size may be sampled.
6.2 The V-belts of the same model and the same material shall be in batches of not more than.200,000. The items examined by the factory shall include the appearance quality in each batch of products.
Dimensions, physical properties, but not less than once a week.
6.3 If there are any unqualified items in the V-belt size, appearance quality and physical properties, double the number of samples in the batch.
The qualified project is re-inspected. If one of the test results is still unqualified, the batch of products is a non-conforming product.
6.4 For the A-type and B-type V-belts of the same type and the same material, two samples shall be taken each time for the V-belt fatigue test.
When the item is used, two samples shall be taken in the batch for re-inspection. If one of the test results is still unqualified, the batch is not suitable.
Ge products. The V-belt fatigue test shall not be less than once per season.
6.5 V-belt needs to be type tested if there is a major change in structure, material or process in case of conversion, conversion, or resumption of production after production stoppage, V-belt type
In the case of inspection, the entire contents of Chapter 5 shall be examined.
7 Test methods
7.1 The appearance quality of the V belt, the damage of the angled canvas and the length of the flash are measured with a tape measure or a caliper, and the rest are checked by visual inspection.
7.2 The dimensions of the V belt are measured in accordance with the provisions of GB/T 11544.
The tensile strength and reference elongation of the 7.3 V belt shall be tested in accordance with the provisions of GB/T 3686. The reference force is as specified in Table 3.
Table 3 reference force parameter unit is kilonewton
V belt model YZABCDE
Reference power 0.6 0.8 1.4 2.4 3.9 7.8 11.8
7.4 For the bond strength test between cloth and top rubber, first cut two samples on the top of the V-belt, the sample is rectangular and the width is 10.0mm±0.2mm.
If necessary, the thickness should be appropriately thinned. And there is enough length to make the separation length in the measurement process not less than 100mm. Movement speed of the gripper
The degree is 100mm/min±10mm/min, and the value is obtained according to GB/T 12833, and the arithmetic mean of the two samples is calculated.
The 7.5 V belt has no torque fatigue life and the pulley center distance change rate is tested in accordance with GB/T 15328.
8 Marking, labeling, packaging, transportation and storage
8.1 mark
Each V-belt shall be clearly marked with no water wash and shall include at least the following.
a) mark;
b) manufactu......
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