JB/T 8815-1998 This standard is used in conjunction with JB/T 2983.1-1998 "Track-type bulldozer track rollers" and JB/T 3262-83 "Track-type bulldozer guide wheels". This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of zinc-aluminum alloy bushings for construction machinery (hereinafter referred to as bushings). This standard is applicable to various bushings of crawler machinery such as bulldozers, excavators, pipelayers, well-draining machines, loaders, etc., and can also be used as a reference for other mechanical products. JB/T 8815-1998 Technical conditions for zinc-aluminum alloy bushings for construction machinery JB/T8815-1998 Standard download decompression password: www.bzxz.net

1C853.10m
Machinery Industry Standard of the People's Republic of China
JB/T8815—1993
Construction machinery
Technical conditions for zinc-aluminium alloy bushings
Construction machinery . Zinc-aluminium alloybushings-Technical specifications1998-09-30Promulgated
State Bureau of Machinery Industry
1998-12-01Implementation
JB/T88151998
Wen Chongyan, JB/T3262.83&Belt-type bulldozerThis standard is used in conjunction with JB/F2983.1-1998 Guide Specification for Pushing Machines 3
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This standard is proposed and managed by the Construction Machinery Standardization Technical Committee of the Ministry of Machinery Industry. The drafting units of this standard are Yanggong Mechanical Research Institute of Ministry of Machinery Industry and Beijing Wear-resistant Parts Factory. The main drafters of this standard are from China. Scope
Machinery Industry Standard of the People's Republic of China
Technical specifications for zinc-aluminum alloy bushings for engineering machineryCunstructhot mechinery-ipc-aluminiutm alloyhushingsTecbndcal apeciflcatlosJB/T8815-1998
This standard specifies the technical requirements, test methods, control regulations, marking, packaging, transportation and storage of aluminum alloy bushings (hereinafter referred to as bushings) for engineering machinery.
This standard applies to the shaft sleeves of bulldozers, earthmoving machines, conveyors, well drilling machines, loaders and other belt-type machinery. Other mechanical products may also refer to this standard.
2 Referenced standards
The following standards contain the texts that constitute the texts of this standard through reference in this standard. When this standard is issued, all versions are valid. All standards will be revised. Therefore, the parties using this standard should explore the possibility of using the latest version of the following standards. GB22987
GH 231—84
GE/I H7-9?
GR1S58-R0
G Wan 282887
GB/T 12689.1~12689.14--99
JB/T 5936-$1
JB/T 594-$1
3 Technical requirements
Method for tensile testing of alloy
Method for Brinell hardness testing of alloy
Shape and position tolerance testing regulations
Batch inspection sampling procedure and sampling table (applicable to inspection of two consecutive batches) Chemical analysis method for zinc and zinc alloy
General technical conditions for machining parts of engineering machinery General technical conditions for lubrication of mechanical partswwW.bzxz.Net
3.1 The sleeve shall comply with the requirements of this standard and shall be in accordance with the production drawings and technical documents of the specified batch. 3.2 The sleeve shall not have pores and pores.
3.3 The sleeve shall not have defects such as scratches, rusts, etc. 3.4 The material grade and chemical composition of the shaft shall be in accordance with the requirements of Table 1. Table 1 Material and chemical properties of the sleeve Alloy grade ZZrA11Ku1Mg ZZ:A1 /C:2Mg Alloy code Approved by China National Machinery Industry Corporation on September 30, 1980 Taijin Yuandong 2 0750, 060. 0O60. 003 0.160,9054,JG5 5,0e3 J998-12-01 3.5 The mechanical properties of the polished grease shall comply with the requirements of Table 2, JB/T8815-1998 Table 2 Mechanical properties of the sleeve 27Cu2Mg
Taiwanese enterprise code
ZAI2-1
When the method and the sweetness
According to the drawing
Note: S-old sand mold bell: metal recovery special manufacturing 1t5-table average sentence ratio process is 320t, 2h, furnace cooling, 3. Core structure, surface work accuracy and surface material accuracy requirements 3.6.1 The structure of the shaft will be in accordance with the user's requirements, and according to the design drawings and order agreements, Brinell hardness
3.6.2 The heat treatment of the sleeve The geometric tolerances and surface tolerances shall comply with the requirements of the drawings and the provisions of B1958.1BT5936.
3.6.3 When there are no special instructions in the drawings and ordering agreements, the unspecified geometric tolerances, inch tolerances, angle deviations, and tolerances shall comply with the provisions of B1958.1BT5936.
3.7 Heat treatment requirements
When a better engraving process is used for the extraction sleeve, the customer's requirements can be met and a uniform heat treatment with a high plastic-to-toughness ratio of the sleeve can be carried out.
3.8 Reliability requirements for recovery
3.8.1 Under normal conditions, the service life of the sleeve shall not be less than 3000b. 3.8.2 The sleeve shall be replaced free of charge by the manufacturer if the shaft fails due to manufacturing quality problems within 12 months from the date of issuance (based on the invoice date) or the cumulative working time is less than 15h. Under the condition that the sleeve meets the requirements of the instruction manual, the manufacturer shall replace the sleeve free of charge. 4 Test method
4.1 Chemical composition
4.1.1 Chemical composition test: Under the condition of ensuring the accuracy of analysis, any method is allowed to be used for analysis. If there is a contradiction, the method specified in (B/T1269.1--12689.14 shall prevail. 4.1.2 Chemical analysis samples: Take one sample before filtration (before furnace) and take one sample after all parts are removed (after furnace). Check the two samples at the same time. If the analysis results meet the requirements of Table 1 If the test is not completed, the chemical composition of the alloy of this furnace (batch) shall be qualified and unqualified: 4.1 Performance test
4.2.1 The drawing test shall be carried out in accordance with the provisions of G322: 4.2.2 The drawing test shall be carried out in accordance with the provisions of GB/T1175. 4.2.3 The mechanical properties test shall be carried out at the same time as the chemical composition test. 4.2.4 The diameter of the sample is 12mm + 0.025mm, which is 5 times the diameter. The sample and the flow system shall comply with the provisions of GB1175
4.2.5 The test shall be carried out in accordance with the provisions of GB231. 4.2. Mechanical properties under heat treatment, the sample combustion treatment must be the same heat treatment process as the same part to be treated, 4.3 The appearance, size tolerance, shape and position tolerance, geometric size, etc. shall be measured with appropriate measuring tools, 5 Inspection rules
5.1 Factory inspection
JB/T B15-190
5.1.1 The factory inspection is divided into full inspection and random inspection. The factory quality inspection department shall conduct the inspection according to the production drawings, relevant technical agreements and the provisions of this standard.
5.1.2 The full inspection items shall at least include surface quality, product structure, small geometric shape and dimensional tolerance. 5.1.3 Randomly inspect 2 pieces of zinc-aluminum alloy products from each furnace. 5.2 Type inspection
5.21 Type inspection shall be carried out when there are major changes in product identification and production process, or when the product is transferred or one year has passed since the last inspection. 5.2.2 Single sample plan: Sampling inspection shall be carried out according to GB2-28, and a double sampling shall be selected. Scheme, general inspection level 1, inspection batch N is 16~25, sample size code is C, sample is 5: 5.2.3 The unqualified classification, inspection items and AQI value of the abandoned shaft shall comply with the provisions of Table 3. Table 3 Unqualified classification, inspection items and AQI1. No sample classification
There are pores, inner diameter and outer diameter of the sleeve, mechanical properties, light chemical or price, and other dimensional tolerances and shape tolerances, surface roughness, hardness, and size tolerances. For example, generally set tolerances
5.2.4 During the inspection process, when the number of unqualified samples is less than or equal to 4c, the sleeve is determined to be qualified; when it is greater than or equal to, the batch of sleeves is determined to be unqualified.
6 Marking, packaging, transportation and storage
6.1 Marking
6.1.1 The manufacturer’s logo and specifications should be marked on a conspicuous position on the shaft sleeve. The location and processing method of the marking should ensure that the quality of the shaft sleeve is not damaged. 6.2 Packaging
6.2.1 The packaging of the rail sleeve should comply with the provisions of JB/T5547. 6.2.2 Before packaging, the sleeve should be cleaned, treated with rust and oxidation prevention, and wrapped with strong and waterproof anti-rust paper before being packed in the packaging box. 6.2.3 The outer surface of the packaging box should have obvious product logo and delivery logo + its contents: 1) manufacturer name, address, postal code: 6) product name, model, specification, quantity: c) delivery address and postal code: e) "handle with care", "prevent false" and other signs; f) date of shipment, 6.2.4 The accompanying documents in the packing box should include: a) product certificate + b) product name and part number; e) quantity and validity period of the packing box, 2.5 The shaft set is packed in a carton and wrapped with tape to ensure that it will not be damaged during transportation. The total weight of each box does not exceed 4k. 6.3 Storage: The shaft should be placed in a well-ventilated and windproof warehouse. From the date of leaving the factory, the manufacturer should ensure that the product will not cause corrosion within one year.
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