JB/T 9731.1-1999 This standard is a revision of ZB J94 008-89 "Technical Conditions for Camshafts of Diesel Engine Fuel Injection Pumps". During the revision, only editorial changes were made according to relevant regulations, and the main technical content remained unchanged. This standard specifies the technical conditions, inspection rules, marking, packaging, transportation and storage of diesel engine camshafts. This standard is applicable to in-line fuel injection pump camshafts for tractors, automobiles, fixed, mobile and small marine diesel engines. This standard was first issued in 1981 as NJ 253-81 and was first revised to ZB J94 008-89 on March 30, 1989. JB/T 9731.1-1999 Technical Conditions for Camshafts of Diesel Engine Fuel Injection Pumps JB/T9731.1-1999 Standard download decompression password: www.bzxz.net

IS43.16.40
Machinery Industry Standard of the People's Republic of China
FB/T9731.1-1999
Technical Specifications for Camshaft of Fuel Injection Pump of Diesel Engines
Technical Specifications for Camshaft of Fuel Injection Pump of Diesel Engines1999-09-17 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
ET9731.1—1999
This standard is a revision of ZBJ9400R—89 Technical Specifications for Camshaft of Fuel Injection Pump of Diesel Engines. During the revision, the original standard was modified in a shortened manner, and the main technical content remained unchanged. This standard will replace ZB19400B—Yang on the date of implementation. This standard will be proposed and managed by the Technical Inspection Committee for the Standardization of the Fuel End of the Fuel Pump. This standard was drafted by: Oil Nozzle Research Institute. The main drafters of this standard are Zhu Shefen and Zhang Yumin. The small standard was first issued in 1981 as N) 253-81 and revised in 1989 as J94008-89. 1 Scope
Mechanical Industry Standards of the People's Republic of China
Camshaft of Diesel Injection Pump
Technical Conditions
'Technicai sprcificatiaisFor eamsaaftoffhel injection pump of diesell eginesJBT31.11999
Generation 144 08-85
This standard defines the technical conditions, inspection rules and marking, packaging, transportation, storage, etc. of the camshaft of the fuel injection pump of some engines. This standard is suitable for in-line fuel injection shafts (hereinafter referred to as camshafts) of small-sized and portable fuel injection pumps for mobile machines, automobiles, and small-sized marine engines. 2. Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid: All standards are revised publicly. All parties using the standards shall discuss the possibility of using the latest versions of the following standards. GB/T 699-.J999
High-quality structural steel
GB/TJ0311995Surface roughness parameters and their values ​​(R/T2R28-1987Batch inspection counting sampling procedures and sampling tables (applicable to inspection of consecutive batches)GBT3077-1999
Alloy structural pinsWww.bzxZ.net
3 Technical requirements
3.1 The camshaft shall be manufactured according to the product drawings and technical documents approved by the prescribed procedures and shall comply with this 3.2 Axle material - The axle shall be made of 20, 45 steel specified in GB/T6991999 or 20CTIBCr2Yi4WA specified in B/T3077-1WW, and other grades of steel approved according to the specified procedures are allowed: 3.3 When 20, 20 core T, 1 core 2N4WA steel is used for manufacturing, the carbon depth of the T working surface and the intermediate bearing of each wheel, such as the oil delivery drive wheel, is 0.8~1.4mm, and the hardness is 58~63HRC. The hardness of the supporting shaft diameter is not less than 40HRC. When made of 45 steel, each cam and oil pump drive wheel is subjected to high-frequency crushing, the hardness depth is 2-6.mm1, the hardness is 56-64HRC, and the hardness of the intermediate supporting shaft neck and the supporting shaft collar at both ends is not less than 40IRC. When made of other grades of sawn wood, the heat treatment hardness of the spare parts should be the same as the above. 3.4 Geometric tolerances of camshafts
3.4.1 The axis line of the chain guide to the body (the part of the column connected by the busbar part) The nominal value is .tmm.3.4.7 The radial micro-motion tolerance of the cone at both ends (the mesh part connected by the drawing part) and the middle bearing journal to the axis of the bearing journal at both ends is 0.03mm8 cylinder and 8 red 1: the tolerance of the camshaft is 0.04mm. 3.4.3 The end face circular runout tolerance of the bearing journal shoulder plane to the axis of the bearing journal is 0.03mm, 3.4.4 The position tolerance zone of the angle between the chain symmetry plane and the design center line of the reference cam is ±1". 3.4.5 The phase angle tolerance zone between the standard cam and each cam is ±30 Approved by the Machinery Industry Bureau on September 17, 1999
Implemented on January 1, 2000
JB/T 9731,1-1999
3.4. The taper of the surface should be in contact with the large section, and the fitting surface should be more than 8%. 3.4.7 The cam lift is matched with the arc surface of the same diameter as the roller. The tolerance band of the cam lift in the rising section is +0.05mm, and the tolerance band of the residual lift is ±0.1mm
3.5 The surface roughness of the camshaft shall comply with the provisions of GB/T1031. 3.5.1 The maximum allowable value of the roughness R of the lower surface of the cam, the middle supporting journal, and the weak pulley of the oil pump is 0.80μm. 3.5.2 The maximum allowable value of the roughness R of the supporting journals at both ends and the surface (the part of the measuring column connected by Gu Du) is 1.60㎡. 3.5.3 The general allowable value of the roughness R of the remaining parts is 12.5M111. 3.6 The finishing of the camshaft shall be inspected by magnetic particle inspection and free of cracks. It shall be demagnetized after inspection. 3. The surface of the camshaft shall not have defects such as bumps, marks, burrs, spots, key corrosion, etc. 3. Under the condition that the user unit complies with the provisions of the use and maintenance manual compiled by the diesel engine manufacturer, if the axle is damaged due to poor manufacturing quality within [2 months] or less than 2000 working hours since leaving the factory, the manufacturer shall provide free compensation: 4 Inspection and testing
4.1 Each camshaft can only be shipped after being inspected and qualified by the technical inspection department of the manufacturer. 4.2 When the ordering unit randomly inspects the original camshafts, it shall follow the normal inspection sampling plan of GB 2828 and conduct a general inspection at level II. 5 Marking, packaging, transportation, storage
5.1 Each camshaft shall be marked with:
a) manufacturer's logo and trademark;
b) part number,
and the position, size and force of the marking shall comply with the requirements of the manufacturer's drawings. Care should be taken not to damage the parts. 5.2 Before packing, the concave wheel must be cleaned and the oil seal must be changed to other anti-corrosion parts, and then wrapped with strong and impermeable neutral film or drive material, and packed in a dry packaging box with waterproof paper, and it can be ensured that the parts will not be damaged during normal transportation. The total weight of the box should not exceed 50kg. If the ordering unit is interested, simple packaging can also be used. 53. A packing list shall be attached to the packing box. The packing list shall include the fuel injection system model, component name, part number and quantity. 5.4. Each camshaft shall be accompanied by a product quality certificate signed by the inspector. The certificate shall indicate: a) Manufacturer name and trademark:
6) Fuel injection pump model, component name and part number: Inspection date.
5.5. The outer surface of the packing box shall indicate:
Manufacturer name and address:
b) Fuel injection pump model and name:
c) Packing date, gross weight (kg)
d) Address to be shipped to and name of consignee:
e) Words or marks such as "Handle with care", "Moisture-proof", etc. The camshaft should be stored in a well-ventilated and dry warehouse. Under normal storage conditions, the manufacturer should ensure that the concave wheel rail will not rust within [2 months from the date of leaving the factory.
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