Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T6279.2—92
Disc harrow
Published on June 10, 1992
Technical conditions
Implementation 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
Technical conditions
Disc harrow
Subject content and scope of application
JB/T6279.2-92
This standard specifies the technical requirements, inspection rules, labeling, packaging, transportation, storage and quality assurance of the early field disc harrow matched with the tractor. This standard applies to the dry field disc harrow matched with the tractor. 2 Reference standards
JB/T6279.1
JB/T6279.3
GB2828
GB3094
GB/T13306
JB/T5673
JB5122
JB5123
3 Technical requirements
General technical requirements
Basic parameters of round cakes
Test methods for round cakes
Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) Technical conditions for high-quality carbon structural steel
Carbon structural steel
Dimensions and shapes of hot-rolled steel and square steel , weight and allowable deviation High-quality carbon cable structural steel thin steel plate and steel strip High-quality carbon structural steel hot-rolled thick steel plate and wide steel strip Cold-drawn seamless special-shaped steel pipe
Basic tooth type of ordinary thread
Diameter and pitch series (diameter 1~600mm)
Ordinary thread:
Basic size of ordinary thread (diameter 1~600mm) Ordinary thread tolerance and fit (diameter 1~355mm) Sign
General technical conditions for painting of agricultural and forestry tractors and machinery ZG1 series single-acting plunger hydraulic cylinder
SG1 series double-acting hydraulic cylinder
Disc harrows should comply with the requirements of this standard and be manufactured according to drawings and technical documents approved by the prescribed procedures. The basic parameters of disc harrows should comply with the provisions of JB/T6279.1. 3.1.32
During operation and transportation, all fasteners should be firm and reliable, and parts that are easy to loosen automatically should be equipped with anti-loosening devices. 3.1.4
The bearing group of the disc target group should preferably use rolling bearings, and the lubricating oil capacity of its structure should be able to ensure the use of one operating season. 3.1.5 The operating surface of parts and components operated by hand should be smooth, without burrs and sharp edges. 3.2 Performance
3.2.1 Under the conditions that the moisture content of loam or clay is 15% to 25% and the slip rate of the tractor drive wheel (left and right) is not more than 20% when the unit is operating, the tillage quality of the disc target should meet the requirements of Table 1. The indicators in the table are measured according to JB/T6279.3. Approved by the Ministry of Machinery and Electronics Industry on June 10, 1992, and implemented on July 1, 1993
Coefficient of variation of stubble depth stability
Soil crushing rate
Standard deviation of surface after stubble
Standard deviation of ditch bottom flatness after stubble
Stubble elimination rate%
Utilization rate of traction power
JB/T6279.2—92
Note: ①Light target includes hanging middle target (the same below), which is mainly used for soil crushing after target, and is tested on cultivated land for one operation. Tillage quality
②Middle harrow does not include hanging middle target (the same below), which is mainly used for soil crushing after stubble or tillage, and is tested on wheat stubble land (stubble height <15cm) at an appropriate deflection angle. ③ Heavy rake is mainly used for target recommendation, rake or soil crushing after ploughing, and is tested once on the wheat field (at height <15cm) at an appropriate deflection angle. 3.3
Product reliability
The effectiveness (reliability in use) and workload before the first failure of the product shall comply with the provisions of Table 2. Table 2
Effectiveness (reliability in use)
Workload before the first failure
ha/mWidth
During the whole process of reliability in use assessment, the traction (suspension) frame, frame, rake group beam, transportation mechanism, and rake blade should not be damaged, permanently deformed, rolled or brittle in normal operation. 3.3.3 The assessment work volume of the reliability of use: the disc pads of small tractors below 18kW (including 18kW) shall be no less than 40ha per meter of pads; the disc pads of large and medium-sized tractors above 18kW shall be no less than 60ha per meter of pads. 3.3.4 The first failure refers to the first damage of non-main parts and components of the whole machine (except for wearing parts), and the damage of the parts will affect the normal operation of the whole machine. 3.4 The target blade should be made of 65 calcium steel plate with performance not lower than that specified in GB699, GB710 and GB711. The target blade should be heat treated and its hardness should be 38~48HRC. However, the hardness range of the same product variety is 7 degrees. The test steps for the pass rate of the hardness point of a single bah piece are as follows:
In the annular area 20 to 60 mm away from the outer edge of the bah piece, select any 4 points as the measurement base points; a.
The measuring point area should be polished once, and no surface treatment should be performed during the test; The pass rate of the hardness of the harrow piece is calculated according to the cumulative pass rate of the hardness points: The pass rate of the target hardness point =
The pass rate of the target hardness should be greater than or equal to 85%. The number of hardness pass points
×100%
The number of hardness test points
3.4.3 Bah piece cutting edge thickness: When the thickness of the bah piece is less than or equal to 5 mm, the cutting edge thickness should not be greater than 0.8 mm; when the thickness of the bah piece is greater than 5 mm, the cutting edge thickness should not be greater than 1.0 mm. 2
3.4.4 The edge of the target blade should not have burrs and cracks, JB/T6279.2-92
3.4.5 The edge of the target blade should be incomplete: when the diameter of the target blade is less than 550 (560) mm, the depth should not be greater than 1.5 mm and the length should not be greater than 15 mm; when the diameter of the target blade is equal to or greater than 550 (560) mm, the depth should not be greater than 2.0 mm and the length should not be greater than 20 mm; the distance between the two places should be no less than 150 mm, and there should be no more than three places on the same target blade. 3.4.6 The surface of the concave surface of the target blade. When using a sample to inspect a curved surface, the local gap between the concave surface and the sample: the gap of the target blade with a diameter less than 550 (560) mm should not be greater than 3 mm; the gap of the target blade with a diameter equal to or greater than 550 (560) mm should not be greater than 4.5 mm. 3.4.7 Flatness of the outer edge of the blade. When the blade is placed on the platform for inspection, the local gap between the edge of the blade and the platform: the gap should not be greater than 4mm when the blade diameter is less than 550 (560) mm; the gap should not be greater than 5mm when the blade diameter is equal to or greater than 550 (560) mm. 3.4.8 The runout around the blade edge should comply with the requirements of Table 3. Table 3
Pattern diameter
450(445,460)
500(510)
550(560)
600(610)
650(660)
Radial runout
End runout
3.4.9The local wrinkles on the blade edge should not exceed three. The local wrinkle value should be measured in the normal direction and its value should not exceed 0.3% of the diameter of the target. 3.4.10The coaxiality of the outer circle of the target with the square hole should not exceed Φ3mm. 3.4.11
There should be no cracks on the surface of the target.
3.4.12The factory-made target should be printed with a trademark. The trademark should be correct and clear. 3.5 Square shaft
3.5.1 Square shafts shall be made of Q275 steel not lower than that specified in GB700 and GB702. 3.5.2 The straightness of square shafts shall not be greater than 1000:2, but the straightness within the length of 230mm shall not be greater than 1mm. The coaxiality between the square shaft head and the square shaft shall not be greater than Φ1.5mm. The coaxiality between the threaded part and the square shaft shall not be greater than Φ1mm. 3.5.3 The threaded part of the square shaft shall comply with the provisions of ordinary coarse thread in GB192.GB193.GB196 and GB197, and its tolerance zone code is 6g. The thread tail is not allowed to have a back-cut groove. 3.6 Hooking pin
Hooking pins shall be made of 45 steel not lower than that specified in GB699 and GB702. 3.6.1
The working surface of the hooking pin shall be heat treated, and the hardness shall be 3545HRC. 3.6.3
The hitch pin should not have cracks and burrs.
3.7 Transport wheel
The transport wheel axle should be made of 45 round steel specified in GB699 and GB702. The working surface of the transport wheel axle should be heat treated with a hardness of 35~45HRC. Rubber tires should be used for transport wheels. Www.bzxZ.net
3.8 Hydraulic cylinder
3.8.1 Single-acting hydraulic cylinders should comply with the provisions of JB5122. 3.8.2 Double-acting hydraulic cylinders should comply with the provisions of JB5123. 3.9 Rake
3.9.1 The target rack should preferably use a rigid target rack welded with a rectangular or square steel pipe with performance not lower than that specified in GB3094. 3.9.2
The weld size of the target rack should meet the requirements of the drawing, the welding place should be firm, and the weld should not have defects such as pores, undercuts, clamps, cracks, and wood welds that affect the strength.
JB/T6279.2-—92
3.9.3 The target rack should be straight after welding, and the flatness of its installation surface should not be greater than 200:1. 3.10
After the target group is assembled, the target piece should not be loose. The bearing should rotate flexibly. After the target group is assembled and adjusted, the runout around the target piece should meet the requirements of Table 4. Table 4
Diameter of target
450(445,460)
500(510)
550(560)
600(610)
650(660)
Radial motion
3.10.3 For target groups with notched target pieces, the notches of adjacent target pieces should be installed staggered. 3.11
Technical requirements for complete machine assembly
During the complete machine assembly inspection, the parts and components should not be modified. 3.11.1
All fasteners must be firm and should not be loose. The adjustment mechanism should be flexible and reliable, and the handle operating force should not exceed 150N. End face runout
The deflection angle of the rake group should be adjustable, and its adjustment range should comply with the provisions of JB/T6279.1, and its tolerance is ±2°. The gap between the working edge of the scraper and the concave surface of the cake sheet should comply with the provisions of Table 5. Table 5
Cake sheet diameter
<550(560)
>550(560)
The rake group should rotate flexibly and without obstruction. When the whole machine is lifted, the torque required to rotate the target group is not more than 55Nm. The hydraulic oil system should be subjected to pressure resistance test according to relevant national standards, and the seal should not leak oil. The radial runout and end face runout of the rubber transport wheel for traction or semi-suspension cakes should not exceed 5mm. The transportation clearance of cakes should comply with the provisions of JB/T6279.1. Each lubrication part should be filled with lubricant. The friction surface and threaded part should be coated with anti-rust oil. Appearance requirements
Before painting, the rust layer, welding slag, exposed skin, sticky sand, burrs, oil stains and dust on the surface of parts and components should be removed, and then anti-rust primer should be applied, and then topcoat should be applied.
The paint should meet the requirements of JB/T5673, the surface should be uniform, and there should be no paint leakage, peeling and flaking. There should be no paint leakage greater than 2cm*/m in width, and the paint film adhesion should not be lower than level 2 in two places and level 3 in one place: Metal surfaces in contact with soil and metal surfaces that are not exposed after assembly can only be painted with primer. 3.12.3
Inspection rules
Before each round cake leaves the factory, it should be inspected and qualified by the quality inspection department of the manufacturer, and can only leave the factory with a product quality certificate. When the round cake is mass-produced, a type test should be carried out every five years according to the full content of this standard JB/T6279.2-92
4.3 When the ordering unit samples the product, it should be carried out according to the provisions of GB2828. The sampling batch and qualified quality level shall be determined by negotiation between the supply and demand parties. 5 Labels, packaging, purchase and transportation, and storage
5.1 Labels
5.1.1 There should be a product label in a conspicuous position on the round cake, and its contents include: a. Manufacturer name;
b. Product model and name;
c. Product manufacturing number;
d. Product ex-factory date.
5.1.2 The label should comply with the provisions of GB/T13306. 5.2 Packaging
5.2.1 Disc harrows are shipped from the factory as assembled parts (unless otherwise agreed upon by the supplier and the buyer). 5.2.2 The packaging should be firm and reliable to ensure that they are not lost during transportation. 5.3 Random accessories
5.3.1 Technical documents
The technical documents should include the following:
Instruction manual;
List of random spare parts and tools (including the part agreed upon by the supplier and the buyer); c.
Packing list;
d. Product quality certificate;
Usage questionnaire.
5.3.2 Spare parts and tools.
5.4.1 Disc harrows should be stored in a ventilated and dry warehouse and should not be lost, rusted or deformed. 5.4.2 During transportation, they must be covered with a awning to prevent sun and rain. 5.5 Storage
When the round cake is out of use for a long time, it should be maintained and repaired, the attached waste should be removed, and sun protection, rain protection and rust prevention measures should be taken. 6 Quality assurance period
If the user complies with the provisions of the product instruction manual provided by the manufacturer, within two years from the date of the user's delivery, if the product is damaged or cannot operate normally due to manufacturing quality reasons, the manufacturer shall be responsible for free repair or replacement (except wearing parts). Additional notes:
This standard was proposed and coordinated by the Chinese Academy of Agricultural Mechanization Sciences. This standard was drafted by the Chinese Academy of Agricultural Mechanization Sciences, Xuzhou Agricultural Machinery Factory and Yucheng Machinery Factory. The main drafters of this standard are Mu Weifeng, Zhou Dawen and Liu Fenglin. From the date of implementation of this standard, NJ16478 "Technical Conditions for Round Cake" will be invalid.
People's Republic of China
Mechanical Industry Standard
Technical Conditions for Reversing Harrow
JB/T6279.2-92
Published and distributed by the Mechanical 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
1/16 Printing Sheet 1/2 Number of Words 10,000
Format 880×1230
First Edition in June 1993
First Printing in June 1993
Print Quantity 00.001500 Price 1.60 Yuan
No. 09003 When the ordering unit samples the product, it shall be carried out in accordance with the provisions of GB2828. The sampling batch and qualified quality level shall be determined by negotiation between the supply and demand parties. 5 Labels, packaging, purchase and transportation, storage
5.1 Labels
5.1.1 There shall be a product label in a conspicuous position on the disc harrow, and its contents shall include: a. Manufacturer name;
b. Product model and name;
c. Product manufacturing number;
d. Product ex-factory date.
5.1.2 Labels shall comply with the provisions of GB/T13306. 5.2 Packaging
5.2.1 Disc harrows are all shipped from the factory as assembled parts (unless otherwise agreed by the supply and demand parties). 5.2.2 The packaging shall be firm and reliable to ensure that it is not lost during transportation. 5.3 Random accessories
5.3.1 Technical documents
The technical documents shall include the following contents:
Instruction manual;
List of random spare parts and tools (including the part agreed by both parties);c.
Packing list;
d.Product quality certificate;
Usage questionnaire.
5.3.2 Spare parts and tools.
5.4.1 Disc harrows shall be stored in a ventilated and dry warehouse and shall not be lost, rusted or deformed. 5.4.2 During transportation, they must be covered with a awning to prevent sun and rain. 5.5 Storage
When the disc harrow is out of use for a long time, it shall be maintained and repaired, the attached waste shall be removed, and measures shall be taken to prevent sun, rain and rust. 6 Quality Assurance Period
Under the condition that the user complies with the provisions of the product manual provided by the manufacturer, within two years from the date of the user's delivery, if the product is damaged or cannot operate normally due to manufacturing quality reasons, the manufacturer shall be responsible for free repair or replacement (except for wearing parts). Additional Notes:
This standard is proposed and managed by the Chinese Academy of Agricultural Mechanization Sciences. This standard was drafted by the Chinese Academy of Agricultural Mechanization Sciences, Xuzhou Agricultural Machinery Factory and Yucheng Machinery Factory. The main drafters of this standard are Mu Weifeng, Zhou Dawen and Liu Fenglin. From the date of implementation of this standard, NJ16478 "Technical Conditions for Round Pan Ba" will be invalid.
People's Republic of China
Mechanical Industry Standard
Technical Conditions for Reversing Harrow
JB/T6279.2-92
Published and distributed by the Mechanical 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
1/16 Printing Sheet 1/2 Number of Words 10,000
Format 880×1230
First Edition in June 1993
First Printing in June 1993
Print Quantity 00.001500 Price 1.60 Yuan
No. 09003 When the ordering unit samples the product, it shall be carried out in accordance with the provisions of GB2828. The sampling batch and qualified quality level shall be determined by negotiation between the supply and demand parties. 5 Labels, packaging, purchase and transportation, storage
5.1 Labels
5.1.1 There shall be a product label in a conspicuous position on the disc harrow, and its contents shall include: a. Manufacturer name;
b. Product model and name;
c. Product manufacturing number;
d. Product ex-factory date.
5.1.2 Labels shall comply with the provisions of GB/T13306. 5.2 Packaging
5.2.1 Disc harrows are all shipped from the factory as assembled parts (unless otherwise agreed by the supply and demand parties). 5.2.2 The packaging shall be firm and reliable to ensure that it is not lost during transportation. 5.3 Random accessories
5.3.1 Technical documents
The technical documents shall include the following contents:
Instruction manual;
List of random spare parts and tools (including the part agreed by both parties);c.
Packing list;
d.Product quality certificate;
Usage questionnaire.
5.3.2 Spare parts and tools.
5.4.1 Disc harrows shall be stored in a ventilated and dry warehouse and shall not be lost, rusted or deformed. 5.4.2 During transportation, they must be covered with a awning to prevent sun and rain. 5.5 Storage
When the disc harrow is out of use for a long time, it shall be maintained and repaired, the attached waste shall be removed, and measures shall be taken to prevent sun, rain and rust. 6 Quality Assurance Period
Under the condition that the user complies with the provisions of the product manual provided by the manufacturer, within two years from the date of the user's delivery, if the product is damaged or cannot operate normally due to manufacturing quality reasons, the manufacturer shall be responsible for free repair or replacement (except for wearing parts). Additional Notes:
This standard is proposed and managed by the Chinese Academy of Agricultural Mechanization Sciences. This standard was drafted by the Chinese Academy of Agricultural Mechanization Sciences, Xuzhou Agricultural Machinery Factory and Yucheng Machinery Factory. The main drafters of this standard are Mu Weifeng, Zhou Dawen and Liu Fenglin. From the date of implementation of this standard, NJ16478 "Technical Conditions for Round Pan Ba" will be invalid.
People's Republic of China
Mechanical Industry Standard
Technical Conditions for Reversing Harrow
JB/T6279.2-92
Published and distributed by the Mechanical 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
1/16 Printing Sheet 1/2 Number of Words 10,000
Format 880×1230
First Edition in June 1993
First Printing in June 1993
Print Quantity 00.001500 Price 1.60 Yuan
No. 0900
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