This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of crawler wetland bulldozers. This standard applies to crawler wetland bulldozers with mechanical and hydraulic transmission (hereinafter referred to as bulldozers) with power above 74KW (power ≤ 103KW, specific pressure is 25 ~ 36Pa, power > 103KW, specific pressure is 28 ~ 45kpza). JB/T 5960-1991 Technical requirements for crawler wetland bulldozers JB/T5960-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T5960-91
Crawler Wetland Bulldozer
Technical Conditions
Issued on December 12, 1991
Issued by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Implementation on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
Crawler Wetland Bulldozer
Technical Conditions
1 Subject Content and Scope of Application
JB/T596091
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of crawler wetland bulldozers. This standard applies to crawler-type wetland bulldozers (hereinafter referred to as bulldozers) with mechanical and hydraulic transmissions and power above 74kW (when power ≤103kW, the specific pressure is 25~36kPa, and when power >103kW, the specific pressure is 28~45kPa). 2 Reference standards
JB16GG
GB6231
JB3774
Type test method for crawler bulldozers
Determination method for cleanliness of tractors
Noise limits and measurement methods for construction machinery
Product labels
JB/T5936~5947General technical conditions for construction machineryGB2828
3 Technical requirements
Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches)3.1#
Bulldozers should be manufactured according to product drawings and technical documents approved by the prescribed procedures, and should meet the requirements of this standard. 3.2#
The vulnerable parts of bulldozers of the same model should be universal and interchangeable. 3.3 All castings, forgings, weldings, heat treatments, machined parts, assemblies and coatings of bulldozers shall comply with the relevant provisions of JB/T5936~5947 in addition to the technical requirements specified in the drawings. 3.4 The raw materials, standard parts, matching parts, purchased parts and outsourced parts used in bulldozer parts shall comply with the relevant national standards or industry (professional) standards and shall have a certificate of conformity. The main engine manufacturer's inspection department shall conduct an acceptance inspection before entering the factory and confirm that they are qualified before use. 3.5 The capacity of the bulldozer diesel tank shall ensure that the whole machine can work continuously for more than 10 hours, and the sealing parts shall not leak oil or water. 3.6 Performance requirements are shown in Table 1.
4 Test methods
4.1 The manufacturer shall conduct factory tests, regular tests and type tests on the products. The contents and methods of factory tests shall be in accordance with the inspection outline of the manufacturer. The contents of regular tests include the lifting speed and settlement of the bulldozer blade, sealing performance, steering performance, operating force of each part, ear noise and cleanliness. When new products are trial-produced, old products are significantly improved or transferred to other factories for production, and products are improved, type tests should be carried out according to the requirements in Article 3.6, and the test methods should be in accordance with the provisions of JB1666.
4.2 The noise measurement method should be in accordance with the provisions of JB3774.2. 4.3 The bulldozer operation test site should be flat, semi-sandy or semi-clay soil with good adhesion performance, with a moisture content between 16% and 20%, and the dynamic load impact index N of the soil between 3 and 6. The adhesion coefficient of the traction performance test site should be greater than 0.8. Approved by the Ministry of Machinery and Electronics Industry on December 12, 1991 and implemented on July 1, 1992
Technical Project
Rated Power
Specific Power-
Handle Child
Maximum Traction Force
Maximum Traction Efficiency
Maximum Productivity
(20m Transport Distance)
Mechanical
Hydraulic
≤103kw
>103kW
Reliability operation 750h mean failure
MTBF
Machine attendance rate K
Gradability
Braking performance
Starting performance
Steering performance
Sealing performance (after 3h operation)
Cleanliness of hydraulic oil of working device
Cleanliness of rear axle box oil of transmission system
Driver's ear Noise
≤80kW
>80~100
External noise
>100~130
>130~160
≥160kw
Natural settlement of bulldozer
Bulldozer lifting speed
Main clutch operating force
Gearbox operating force
Mechanical
Hydraulic
Steering clutch operating force
Pedal operating force
Maximum seat acceleration 7aa
Root mean square value of seat acceleration A
Painting quality
JB/T5960—91
m'/kw·h
mg/100ml
mg/100ml
mm/15min
Performance requirements
≥0. 70G.
Can climb up a 30° longitudinal ramp smoothly
On a 30° longitudinal ramp, the vehicle speed starts from zero and automatically drops for 1m before braking, and can stop reliably within the ground contact length
When the ambient temperature is -5°C, it can start smoothly without taking any measures. When turning at the first gear speed, the track on the braked side is not allowed to roll, and oil or water leakage is not allowed to drip
《112
≤114
≤116
≤118
≤120
≤120
≤150
≤120
≤200
No lack of paint, no peeling, no flow attenuation
Smooth surface, no rust
Note: G in the table. The weight of the bulldozer is converted into gravity (kN). 2
JB/T5960—91
4.4 The industrial test and reliability test site should be a muddy or swampy ground with a moisture content greater than 20% and a local area with a water accumulation of less than 400mm. The reliability test time is 750h, and the reliability test method is carried out according to the reliability test method of crawler bulldozers. The industrial test time is 1200h.
4.5 Cleanliness test sampling should be carried out 3h after the bulldozer is operated. Oil samples should be taken from the upper, middle and lower parts of the oil tank immediately. The method refers to GB6231.
Inspection rules
Bulldozers must be inspected and qualified by the factory inspection department before they can be shipped. They should be accompanied by a certificate of conformity when leaving the factory. Inspections are divided into three categories: factory inspection, periodic inspection and type inspection. The contents, conditions and test methods of various inspections are shown in 4.14.55.2
Factory inspection shall be carried out on each unit. Regular inspection shall be carried out by the factory at least once a year, and at least one prototype shall be randomly selected from the products that have passed the factory inspection.
5.4 Whenever new products are trial-produced, old products are significantly improved or transferred to other factories for production, and products are superior, type tests shall be carried out in accordance with the procedures of GB2828. 5.4.1
The classification of unqualified inspection items is shown in Table 2.
Unqualified category
Unqualified classification of wetland bulldozer
Unqualified content
The braking and stopping of the whole machine on a 30° longitudinal slope did not meet the index. The average time between failures did not meet the index
The rate of machine withdrawal did not meet the index
Steering performance did not meet the index
The maximum traction did not meet the index
The maximum productivity did not meet the index
Slope holding performance did not meet the index
Starting performance did not meet the index
Sealing performance did not meet the index
The cleanliness of the working device oil tank did not meet the index
The cleanliness of the rear axle box did not meet the index
The maximum traction effect did not meet the index
The noise at the driver's ear did not meet the index
External noise Not up to standard
Main clutch operating force not up to standard
Gearbox operating force not up to standard
Steering clutch operating force not up to standard
Pedal operating force not up to standard
Natural settlement of bulldozer not up to standard
Lifting speed of bulldozer not up to standard
Appearance quality not up to standard
Painting quality not up to standard
Specific power not up to standard
Maximum acceleration transmission rate not up to standard
Acceleration, weighted root mean square value not up to standard 2 qualified quality level AQL value, selected A class is 6.5, B class is 25, C class is 65. 5.4.2
It is stipulated that a normal sampling plan is selected and a special inspection level S-1 is selected. Generally, the inspection batch N-2~25 (sets), but when sampling among users, the size of N is not limited. 5.4.4
JB/T5960—91
5.4.5. Check the sample size code is A, sample size n = 2 (units). At least one unit must be subjected to reliability test or industrial test. 5.4.6 The judgment number in the sampling plan, Class A: A = 0, R = 1; Class B: A. = 1, R. = 2; Class C: A = 3, R. = 4. 5.4.7 The implementation of sampling inspection adopts the surprise sampling method, and emphasizes randomness and equal opportunity. 5.4.8 The evaluation of sampling inspection, when the number of unqualified in the sample is less than or equal to A., the class is evaluated as qualified; when it is greater than or equal to R., the class is evaluated as unqualified. When all classes are evaluated as qualified, they are finally evaluated as qualified. When any one or more classes are evaluated as unqualified, they are finally evaluated as unqualified. The evaluation results are shown in Summary Table 3. Table 3 Summary of sampling inspection and evaluation results of wetland bulldozers Product model:
Manufacturer:
Class A non-conforming
Sampling plan
Inspector,
Non-conforming items
6 Marking, packaging, transportation and storage
Inspection date:
Class B non-conforming
AQL=25
Sampling plan
Inspection unit,
Non-conformingbZxz.net
Class C non-conforming
AQL=65
Sampling plan
Each bulldozer should be equipped with a product label in a conspicuous position, and its type and size should comply with the provisions of JB8. Label content:
Product name, model,
Manufacturer name, factory logo or trademark;
Factory number or manufacturing date.
6.2 A sign indicating the working position of the operating mechanism should be installed at a conspicuous position on the control panel. 6.3 The packaging of the bulldozer should comply with the relevant provisions of JB/T5947 for bare packaging. 6.4 The transportation of the bulldozer should comply with the relevant provisions of railway, road or water transportation safety. 6.5 The storage of the bulldozer should meet the requirements of dry, ventilated and anti-corrosion environment. Additional remarks
This standard was proposed and managed by the Tianjin Engineering Machinery Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Tianjin Engineering Machinery Research Institute. The main drafter of this standard is Li Mingxiang.
Qualified surface
Final evaluation results
People's Republic of China
Mechanical industry standard
Quality belt type wetland bulldozer
Technical conditions
JB/T5960-91
Published and distributed by the Machinery Standardization Research Institute of the Ministry of Machinery and Electronics Industry (P.O. Box 8144, Beijing
Copyright
Postal Code 100081)
No reproduction
Printed by Qinghe County Printing Factory, Hebei Province
Format 880×1230
Printing sheet 1/2
Word count 8000
, first printing in March 1992
First edition in March 1992
Print run 0G.001—1000
Price 1.00 Yuan
Serial number 0532
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