JB/T 8883—2001 JB/T 8883-2001 Clamping conveyor chain for agricultural machinery JB/T8883-2001 Standard download decompression password: www.bzxz.net

JB/T 8883--2001
This standard is equivalent to the Japanese standard JIS B9204--1994 "Clamping conveyor chain for agricultural machinery". This standard is the first revision of JB/T8883-1999 "Clamping conveyor chain for agricultural machinery". Compared with JB/T8883--1999, the revised contents of this standard are mainly: 1. The specification varieties of standard chains have been increased from 5 in the original standard to 20 now, and they are completely equivalent to the specifications in JIS B9204.
2. The dimensions of some of the original clamping chain parts have been changed to be equivalent to the provisions of JIS B9204. 3. The various performance requirements of chains and parts have been redefined. This standard replaces JB/T8883-1999 from the date of implementation. This standard is proposed by the National Technical Committee for Standardization of Chain Drives. This standard is under the jurisdiction of the National Technical Committee for Standardization of Chain Drives. The drafting unit of this standard: Jilin University.
The drafting units of this standard include: Hangzhou Donghua Chain Factory, Hangzhou Dunpai Chain Transmission Co., Ltd., and Zhuji Industrial Chain Factory. The main drafters of this standard include: Zhao Sailiang, Ye Bin, Chen Lixin, Zhuang Qihong, and Meng Xiangbin. The drafting participants of this standard include: Sui Xuemin and Wang Haiou. JIS Foreword
This document is used to explain the standard and related matters, and is not part of the standard. 1. Formulation and revision This standard was originally formulated in 1958, revised in 1981, and finalized in 1987. However, this revision is a revision work that is appropriately adjusted based on the current situation. 2. Scope of application The original standard contains "provisions for conveyor chains used in machines such as fixed-type, self-propelled automatic threshers and self-throwing combiners." During the revision, since self-propelled machines are mainly self-propelled automatic threshers and combines are mainly self-thresher combines, it was revised to "This standard specifies the conveyor chains used on fixed or self-propelled automatic threshers and combine machines." 3. The number of types used to be 19, but it was adjusted to 20 based on the current situation. However, two of them were added with brackets because they are not commonly used chains. Although the chain plate structure has A, B, C, C', C\ types, it was deleted because type B is no longer used. 4 The tensile load was previously specified in words, but now it is organized in a table. 5. Running performance New running performance requirements and rules for running performance inspections have been added. 351
Professional Standard of the People's Republic of China
Feed chains for agricultural machinery
Feed chains for agricultural machineryJB/T 8883—2001
egv JIS B9204--1994
Replaces JB/T8883--1999
This standard specifies the structural type, size, relevant technical requirements and product code of the clamping conveyor chain for agricultural machinery. This standard applies to walking wheat and rice harvesters and fixed motorized rice and wheat threshers, as well as tea stalk clamping conveyor chains used on semi-warm combine harvesters.
2 Referenced standards
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 will be revised, and the parties using this standard should explore the possibility of using the latest version of the following standards. GB/9785-1988 Terms for chains and sprockets
GB/T1172--1999 Conversion values ​​for hardness and strength of ferrous metals 3 Chains and their components
Terms for chains and their components shall be in accordance with GB/T9785, and the specific names are shown in Figure 1. Bent chain plate
Connecting pin
Connecting chain plate
Split pin
Inner zinc plate
Figure 1 Clamping chain and its components
4 Structural type and size
4.1 The chain structure is shown in Figure 2, and the chain size shall comply with the requirements of Figure 2 and Table 1. 352 issued by the State Bureau of Machinery Industry on May 23, 2001
External link
Implemented on October 1, 2001
(S3318)
(S3322)
Note: Chain numbers in brackets should be avoided as much as possible
Inner link
JB/T 8883-2001
Figure 2 Chain structurebZxz.net
Chain size
Roller outer diameter
12. 7±0. 1
Pin diameter
Chain plate thickness
Inner link T
1. 6±0.17
1.6±0.17
Outer link plate T2
1.6±0.17
1.6±0.17
JB/T8883--2001
4.2 The thickness combination of the chain plates shall comply with the provisions of Table 2. Table 2 Chain plate thickness combination
Ditch outer diameter
Inner link plate T
4.3 The type and size of the chain plates shall comply with the provisions of Figure 3 and Table 3. Type A
Chain plate type
Type C
Chain plate type
Table 3 Chain plate dimensions
Dimensions of various parts of chain plate
Chain plate thickness
Type c
Outer link plate T,
Type c
Chain plate height
Chain plate type
JB/T8883--2001
Table 3 (end)
Dimensions of various parts of chain plate
Chain plate height
Note: The method of expressing the plate height code is as follows: for types A, C, and C, the value of H1 is a single digit, and the values ​​of H2 and H3 are each expressed in combination of two digits; for type C\, the value of H1 is a single digit, and the value of H4 is expressed in combination of two digits. 4.4 The dimensions of the “flanged” part of the inner chain plate shall comply with the provisions of Figure 4 and Table 4. “Flanged” means processing a circular boss around the chain plate hole.
Figure 4 “Flanged” processing of chain plate
Dimensions of “flanged” part
Chain plate thickness
Dimensions of “flanged” part
Outer diameter of front spring
Not exceeding the outer diameter of the roller
5 Technical requirements
5.1 Chain length accuracy
JB/T 8883-2001
Take a chain with a length of more than 15 links and no grease, fix one end of the chain, and apply a load of 175N to the other end to test its length. The deviation of the chain length accuracy is ±0.4% of its reference length. The reference length is determined by the following formula: Xa=pX
Where: Xa-reference length (mm);
p—pitch, mm;
X—number of links.
5.2 Tensile load
Take a chain with more than 5 links as the test piece, install the pins at both ends at the position B shown in Figure 5, and the minimum tensile load of the chain should reach the value specified in Table 5
A is the relevant size of the tensile testing machine. The actual structure may be different from Figure 5. 26 Values ​​are shown in Table 1.
Figure 5 Test fixture
Table 5 Tensile load
Chain plate thickness
When the outer chain plate thickness is 1.2mm
Others
The hardness of each part of the chain should comply with the provisions of Table 6. Conversion of hardness values ​​is allowed. Table 6 Hardness
Parts Name
Instructions:
1)RH15N is an additional item.
Tensile load min
Hardness HRC (HRA, HR15N1))
30 or more (65.3 or more, 74.1 or more)
39 or more (70.0 or more, 79.3 or more)26 or more (63.3 or more, 71.9 or more)
JB/T8883—2001
5.4 Appearance
The appearance of the chain shall not have defects such as scratches, rust, burrs, etc. 5.5 Running performance
When the chain is moved 180° around the roller shown in Figure 6, the rotation between the chain links must be smooth and free. (h
1×-15\
Figure 6 Roller for testing running performance
6 Product code
The chain product code consists of chain number, chain plate type code, chain plate height code, inner chain plate thickness, outer chain plate thickness, number of chain links and standard number. For the inner chain plate that is "flanged", b is added after the chain plate type code to indicate it. Example 1: S3550
31015-2.0-2.0-50-JB/TXXXX
Standard number
Number of links
Thickness of outer chain plate
Thickness of inner chain plate
Chain plate height code
Indicates that the inner chain plate is "flanged"
Chain plate type code
Example 2: S3550A01006-1.6-2.0-50-JB/T8883Example 3: S3550Cb01815-2.0-2.0-50-JB/T8883 (Indicates that the inner chain plate is "flanged") 7 Marks
The outer packaging of the chain should have the following marks: a: Product code
b. Manufacturer name or trademark code.
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