This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation, storage, etc. of road milling machines. This standard applies to milling machines used in the maintenance of asphalt concrete pavement and cement concrete pavement. JB/T 5950-1991 Technical requirements for road milling machines JB/T5950-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T595091
Road Milling Machine
Published on December 12, 1991
Technical Conditions
Implemented on July 1, 1992
Published by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Mechanical Industry Standard of the People's Republic of China
Road Milling Machine
1 Subject Content and Scope of Application
Technical Conditions
JB/T5950-91
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of road milling machines (hereinafter referred to as milling machines).
This standard applies to milling machines used for the maintenance of asphalt concrete pavements and cement mud concrete pavements. 2 Reference standards
ZBJ85011
JB/T5945
JB2299
JBn4198
GB4785
GB8419
ZBJ85008
JB/T5947
GB8502
GB3766
3 Technical requirements
Minimum inlet dimensions of engineering machinery
General technical conditions for engineering machinery assembly
Painting colors and safety signs for mining, engineering, lifting and transportation machinery products for engineering machinery Technical conditions for diesel engines
Number, location and light color noise limits of external lighting and signal equipment for vehicles and trailers
Construction machinery
Earth-moving machinery
Driver seat vibration test method and limit
Road milling machine
Product label
Test method
General technical conditions for packaging
Construction machinery
Protection and storage
Earth-moving machinery
General technical conditions for hydraulic systems
3.1 Milling machines shall comply with the requirements of this standard and be manufactured in accordance with drawings and technical documents approved through prescribed procedures. 3.2 All raw materials shall have official markings and certificates of conformity from the supplier. The manufacturer shall conduct random inspections and use them only after confirming that they are qualified. 3.3 Purchased and outsourced parts must have certificates of conformity. The manufacturer shall conduct random inspections and use them only after confirming that they are qualified. 3.4 Product maintenance
The size of the opening for maintenance shall comply with the relevant provisions of ZBJ85011. All parts that need to be tightened and lubricated shall be left with positions that are convenient for operation.
3.5 The milling machine shall have a device or mark to facilitate the inspection of the oil level of fuel, hydraulic oil and lubricating oil. 3.6 In addition to meeting the technical requirements indicated in the drawings, the assembly of the product shall also comply with the relevant provisions of JB/T5945. 3.7 The exposed machined surfaces of the milling machine and the surfaces of the tools, spare parts and other surfaces that need to be rust-proof shall be carefully cleaned and painted with anti-rust paint or anti-rust grease. The surface shall be uniform and the color shall be consistent, and shall not be rough or uneven. 3.8 The color of the milling machine's exterior shall comply with the relevant provisions of JB2299. The wheel rim shall be painted with color-matching paint. 3.9 The fuel tank capacity of the milling machine shall ensure that the machine can operate continuously for no less than 10 hours. 3.10 The milling machine should be easy to operate, flexible in steering, reliable in braking, and the cab should have a good view. 3.11 When the milling machine is working normally, the maximum temperature of the hydraulic oil shall not exceed 80℃. Approved by the Ministry of Machinery and Electronics Industry on December 12, 1991 and implemented on July 1, 1992
JB/T5950-91
The technical requirements of the hydraulic system shall comply with the relevant provisions of GB3766. The cleanliness of the hydraulic oil tank shall not exceed 15mg/L. The closed hydraulic circuit of the milling machine shall be strictly kept clean, and the filtration accuracy of the hydraulic oil used shall be 10μm. The driving braking distance of the milling machine is 35m.
The climbing ability of the milling machine shall not be less than 12%.
The fuel consumption rate of the whole machine during operation shall comply with the provisions of JBn4198. The reliability of the whole machine shall meet the following requirements: a.Www.bzxZ.net
The machine attendance rate shall not be less than 85%:
The mean time between failures (MTBF) shall not be less than 200h. b.
3.19 The external lighting and signal devices of the milling machine shall meet the relevant provisions of GB4785. 3.20
The noise limit of the milling machine shall meet the provisions of JB3774.1. 3.21
The vibration limit of the driver's seat shall meet the provisions of GB8419. 3.22
The operating force of the joystick shall not exceed 120N.
The exhaust smoke density and specific emission of the diesel engine shall meet the provisions of JBn4198. 4 Test method
4.1 Sealing of the whole machine
Stop the milling machine after 3 hours of operation, and check whether there is oil or water leakage on each joint surface within 15 minutes. 4.2 Cleanliness of hydraulic oil tank
4.2.1 Use a 0.45μm filter to filter No. 120 industrial gasoline as cleaning liquid, soak and wash the 400-mesh copper wire filter, evaporate and dry at 100C, take it out and put it in a dryer, cool it at room temperature for 30 minutes, and then weigh it with a balance with an accuracy of more than 0.01g. 4.2.2 Clean the exposed part of the tank, then drain the oil in the tank, open the tank cover, remove the filter (net) in the tank, use an oil suction gun to suck the cleaning liquid, repeatedly rinse the inner wall of the tank, and filter all the oil discharged from the tank and all the cleaning liquid used for cleaning on the weighed filter.
4.2.3 Place the above filter in a 100±5℃ oven for 2h, then place it in a dryer, cool it at room temperature for 30min and weigh it on a flat surface. Subtract the original weight of the filter from the weight obtained to get the weight of the oil tank contents, which is divided by the volume of the discharged oil to get the cleanliness of the oil tank.
4.3 Vibration of the driver's seat
The seat vibration test is carried out in accordance with the provisions of GB8419. 4.4 The tests of other items are carried out in accordance with the provisions of ZBJ85008. 5 Inspection rules
5.1 The milling machine manufacturer shall conduct factory inspection, type test and regular inspection. 5.1.1 Factory inspection
Each product must undergo factory inspection and can only be shipped after being confirmed as qualified. Factory inspection shall be strictly carried out in accordance with the factory test list compiled by the manufacturer. The whole machine shall be comprehensively inspected according to the drawings and documents, and no-load and load dynamic rotation tests shall be carried out to check the technical conditions of the main components and the working capacity of the whole machine. 5.1.1.1 Appearance inspection (the whole machine shall not be disassembled), and the following items shall be inspected: correctness and completeness of assembly;
completeness of delivery of the whole machine, spare parts and random tools; acceptance or lead seal marks of each component;
luan film color and appearance quality;
welding quality;
f. Whether there are obvious defects or damages in appearance; 2
tightness of the whole machine;
lubrication status of each sliding part;
installation status of various oils such as fuel.
5.1.1.2 The following items shall be measured during factory inspection: a.
braking distance:
lifting action time of milling device;
turning radius.
Type test
JB/T5950—91
All new products and modified products shall be subjected to type test in accordance with the test methods specified in ZBJ85008. 5.1.3 Periodic inspection
Periodic inspection shall be carried out on one product at least once a year in accordance with the provisions of ZBJ85008. The following items shall be measured during the inspection: a.
Working speed of milling device;
Lifting speed of milling device;
Circumferential force of milling device;
Maximum traction;
Steering performance;
Braking performance;
Travel speed;
Noise;
Operating force of joystick;
Cleanliness of hydraulic oil tank;
Full consumption rate of the whole machine.
6 Marking, packaging, transportation and storage
6.1 Marking
6.1.1 The product label should be fixed in a conspicuous position on the milling machine body, and the form, size and technical requirements of the label should comply with the relevant provisions of JB8.
The product label should include the following content:
Manufacturer name;
Product name;
Product model;
Manufacturing date or production batch number;
Main parameters of the product (power, machine weight, milling width, milling depth and overall dimensions). 6.2 Packaging
The packaging of the milling machine and its accessories should comply with the relevant provisions of JB/T5947. 6.3 Transportation
The transportation of the milling machine must comply with the regulations for land or water transportation. 6.4 Storage
The storage of milling machines shall comply with the relevant provisions of GB8502. 7 Warranty period
If the user follows the use and storage rules specified in the maintenance manual, within 3
JB/T5950-91
year from the date of shipment (based on the date of the delivery invoice), if the product cannot work properly due to poor manufacturing quality, the manufacturer shall promptly repair or replace it for the user. Additional notes,
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 drafters of this standard are Sun Lihai and Sun Zhaohui. People's Republic of China
Mechanical Industry Standard
Technical Specifications for Road Milling Machines
JB/T5950-91
Published by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (PO Box 8144, Beijing 100081)
Copyright reserved. No reproduction allowed
Printed at Qinghe County Printing Factory, Hebei Province
Format 880×12301/16 Sheet 1/2
2 Words 8000
First edition in March 1992
First printing in March 1992
No. 0522
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