This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of claw type pulverizers. JB/T 6270-1992 Technical requirements for claw type pulverizers JB/T6270-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T6270-92
Tooth Claw Crusher
Published on June 10, 1992
Technical Conditions
Implemented on July 1, 1993
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
Tooth Claw Crusher
Question Content and Scope of Application
Technical Conditions
JB/T6270-92
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of tooth claw crusher. This standard applies to tooth claw crusher (hereinafter referred to as crusher). 2 Reference standards
GB3943
GB9239
GB6971
GB2828
Technical conditions for high-quality carbon cable structural steel
Four-hole and long-hole screens
Determination of allowable imbalance of rigid rotor balance quality Feed grinder test method
Painting of agricultural machinery
Batch inspection counting sampling procedure and sampling table (applicable to inspection of continuous batches) GB/T.13306 Sign
3 Technical requirements
The grinder shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 3.2 When the unit volume weight of corn is 0.66~0.77t/m, the moisture content is 12%~14%, the moisture content of water chestnuts and stems is 8%14%, and the sieve hole diameters are Φ1.2mm and Φ2mm respectively, and the specified productivity is achieved, its main performance should meet the requirements of Table 1. Table 1
Rotor diameter
Power consumption per ton of material
kW-h/t
Particle size%
Noise dB(A)
Dust concentration mg/m
Elegance (effectiveness)%
Finished product temperature rise ℃
Note: 1) Sweet potato water chestnuts are cut,
2) The values ​​in brackets are those with single-phase motors. Approved by the Ministry of Machinery and Electronics Industry on June 10, 1992
Sweet potato vines"
<250mm
>250mm
<20.(26)\
All pass through the standard hole test powder sieve corresponding to the sieve aperture <93
1993-07-01 implementation
3.3 Technical requirements for main and wearing parts
JB/T6270-92
3.3.1 Flat teeth
3.3.1.1 The 45 steel specified in GB699 shall be used for selection. Other materials with wear resistance and strength not lower than 45 steel are allowed to be used. 3.3.1.2 The heat treatment hardness of the working part is 40~48HRC. 3.3.1.3 Under normal circumstances, when crushing corn, The service life should be no less than 500h. 3.3.2 The round teeth
shall be made of 45 steel specified in GB699. Other materials with wear resistance and strength not lower than 45 steel are allowed to be used. 3.3.2.1bzxZ.net
3.3.2.2 The heat treatment hardness of the working part is 40~48HRC.3.3.3 Sieve
3.3.3.1 The sieve hole arrangement shall be manufactured according to Type Ia specified in GB3943. When the sieve hole diameter d is less than 3mm, Type Ib can be used. 3.3.3.2 The machining accuracy of the sieve holes shall be in accordance with IT13, and the tolerance of the sieve hole spacing shall be manufactured according to IT16 (the tolerance band is symmetrically distributed relative to the basic size). 3.3.3.3 The working surface of the sieve shall be flat, and the punching burrs shall not exceed 0.2mm. 3.3.3.4 The working surface of the sieve shall not Cracks, peeling, spots and rust are allowed. Each sieve hole should not be broken, continuously punched, not punched through or missed. .3.3.3.5
The sieve must be heat treated, and the heat treatment process and technical requirements should comply with the provisions of GB3943. 3.3.3.6 Under normal circumstances, the life of the sieve when crushing corn should not be less than 100h3.4 Assembly technical requirements
3.4.1 All parts must be inspected and qualified before they can be assembled. 3.4.2 The sector teeth should be grouped into the rotor assembly, and the weight difference of the flat teeth in the same group should comply with the provisions of Table 2. Table 2
Rotor diameter
Weight difference of sector teeth in the same group g
3.4.3 After the rotor is assembled, a static balance test should be carried out, and the balancing accuracy level shall be G16 as specified in GB9239. .When the unbalanced weight converted to the rotor outer diameter is less than 1g, it shall be calculated as 1g. 3.4.4 After the sieve is assembled, the screws shall not protrude from the two end faces of the sieve. 3.4.5 The valve shall be opened and closed flexibly, and the body, valve and frame shall fit tightly, and there shall be no powder leakage during operation. 3.4.6 After the main shaft is assembled, it shall rotate flexibly, and the axial vibration shall be within the range of 0.1~0.3mm (for tapered roller bearings) 3.4.7 The bearing chamber shall be clean, and there shall be no oil, iron screen, residual sand and other dirt. A proper amount of nano-based grease shall be added to the bearing chamber. 3.4.8 After the crusher is assembled, an idle operation test shall be carried out remotely. The idle operation shall be carried out at the rated speed for not less than 15 minutes, and the following requirements shall be met:
The operation shall be normal and stable, and there shall be no abnormal sound. The operating device shall be flexible and reliable. a.
b. All connectors and fasteners shall not be loose. c. The bearing temperature rise shall not exceed 20℃.
3.5 The quality of the paint layer on the exposed surface of the pulverizer shall comply with the provisions of the TQ-1-BP (or TQ-1-NP) paint layer in NJ/Z3. 3.6 The pulverizer shall have a magnetic separation device to prevent metal debris from entering. 3.7 The transmission parts of the pulverizer equipped with a complete set of power units shall have protective devices. 3.8 The export of pulverizers shall be carried out in accordance with the foreign trade contract. 4 Test methods
4.1 Performance tests and production tests shall be carried out in accordance with GB69714.2 The adhesion of the paint layer shall be carried out in accordance with the provisions of NJ/Z3. 2
5 Inspection rules
JB/T627092
5.1 The pulverizer shall be inspected and qualified by the quality inspection department of the manufacturer and shall be accompanied by a certificate of conformity before it can be shipped out of the factory5.2 Factory inspection: Each product shall be inspected in accordance with Article 3.4.8 of this standard. 5.3 Type inspection
5.3.1 Type inspection shall be carried out in any of the following cases: when production is transferred to another factory or when production is suspended for a long time; a.
After formal production, if there are major changes in structure, materials, or processes; b.
c. Once every two years in normal production;
d. When the quality supervision agency requires type inspection. 5.3.2 The results of type inspection shall comply with the provisions of Case 3 of this standard. 5.4 The ordering unit has the right to conduct random inspections on the products leaving the factory in accordance with the provisions of GB2828. The sampling inspection method, batch and AQL value shall be decided by the ordering unit and the manufacturer through consultation.
Marking, packaging, transportation and storage
6.1 Each crusher shall be equipped with a product label in an appropriate and obvious position in accordance with the provisions of GB/T13306. The content shall include: manufacturer name;
product model and name;
matching power, spindle speed;
d. weight;
product manufacturing number;
date of manufacture (except for exported machines)
The crusher packaging shall be firm and reliable, easy to transport, and able to prevent parts from being damaged or lost during transportation. 6.2
Spare parts and tools supplied with the product:
Two screens, one pair of screen rings and one pair of screen screws; a.
One set of disassemblers;
One set of round nut wrenches:
Or as specified in the contract.
6.4Documents supplied with the product:
Product instruction manual;
b. Certificate of conformity;
C. User opinion survey form;
d. Packing slip.
6.5The crusher should be stored indoors. If it is stored outdoors, waterproof facilities should be provided. Additional remarks:
This standard was proposed and approved by the Chinese Academy of Agricultural Mechanization Sciences. This standard was drafted by the Shandong Agricultural Machinery Science Research Institute and Qingdao Dahua Machinery Factory. The main drafters of this standard are Lin Juncai, Wang Dongyue and Hu Junhua. From the date of implementation of this standard, NJ86-84 "Claw crusher" will be invalid. People's Republic of China
Mechanical Industry Standard
Technical Specifications for Tooth Claw Type Crusher
JB/T6270-92
Published by the Mechanical and Fuel Standardization Research Institute of the Ministry of Machinery and Electronics Industry Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (PO Box 8144, Beijing 100081)
Copyright reserved. No reproduction allowed
Format 880×12301/16 Printing Sheet 3/8 Number of Words 6.000 First Edition June 1993 First Printing June 1993 Printing 00.001-500
No. 0887
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