JB/T 8578-1997 This standard specifies the technical requirements, inspection methods, inspection rules and marking, packaging, transportation and storage of wedge-rolled blanks for internal combustion engine camshafts. This standard applies to wedge-rolled blanks for reciprocating piston internal combustion engines with a cylinder diameter of less than or equal to 200mm (hereinafter referred to as camshaft blanks). JB/T 8578-1997 Technical conditions for wedge-rolled blanks for internal combustion engine camshafts JB/T8578-1997 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/F8578—1997
Internal Combustion Engine Camshaft Wedge Cross Rolling Rough
Technical Conditions
1997-06-20 Issued
Ministry of Machinery Industry of the People's Republic of China
Implementation on 1998-01-01
JR/T8578—1997
This standard is proposed and managed by the National Technical Committee for Standardization of Internal Combustion Engines. The originating units of this standard are: Shanghai Internal Combustion Engine Research Institute of the Ministry of Machinery Industry, Beijing University of Science and Technology, Sichuan Jiangshi Changlian Industrial Development Corporation. The drafters of this standard are: Li Shaoshuai, Zhao Mingxia, Zhang Kangsheng, Chen Xiaoliang, and Xie Maode. 1 Scope
Machinery Industry Standard of the People's Republic of China
Internal Combustion Engine Camshaft Operating Pads
Technical Conditions
JB/T8578-1997
This standard specifies the technical requirements, inspection methods, inspection rules, printing, packaging, transportation and storage for internal combustion engine camshaft operating pads with a diameter of less than 2 cm or equal to 2 cm (hereinafter referred to as camshaft operating pads).
2 Referenced Standards
The following standards contain clauses that constitute the clauses of this standard through reference in this standard: When the standard was published, the versions shown are valid: All notes are subject to revision, and the possibility of using a new version should be considered for the purposes of this standard. GB/T 22.1. 38R
GB/T 258.4-H3
GB/T 22E.5-83
GR/T 223.7291
G3/T 224. 71-J1
GT 225-91
CH 231-84
G 649-8
GB 2828·87
GB8077-88
G 1036159
GE/113320 $1
IR/T $?28-- 93
JS/T G724-3
YE/T 314893
3 Technical requirements
Copper wire and alloys
Determination of content by anti-phosphodiester method
Chemical analysis methods for iron and alloys Determination by slow oxidation method Chemical analysis methods for iron and alloys Determination by oxalic acid sulphuric acid burning method Determination of sulphur content by oxalic acid sulphuric acid gravimetric method Chemical analysis methods for aluminum oxide separation Determination of sulphur content by sulfuric acid gravimetric method Chemical analysis methods for alloys Combustion gravimetry or combustion gas volumetric method Determination of non-ferrous metallurgical steel structure and defects by acid etching method
Test methods for China||t t||Free of charge Hardness Test Method
High Quality Carbon Steel Structural Properties Technical Parts
Check the sequence and length of each batch (applicable to the inspection of ten consecutive batches) Alloy Steel Technical Parts
Method for Microscopic Evaluation of Additives in the Drawing Metallographic Structure Rating Diagram and Evaluation Method of Steel Segment Parts Technical Conditions for Camshafts of Internal Combustion Engines
Protective Powder Detector Hooks for Internal Combustion Engines
Method for Determining the Crystalline Content of Metallurgical Components
3. The axle ratio shall be manufactured according to the approved drawings and technical documents in the specified sequence. 3.2 Product Requirements
2. Chemical composition shall comply with the specifications in Table 1 or be in accordance with the requirements of the purchaser. Approved by the Ministry of Machinery Industry on June 2, 1997, implemented on January 1, 2008. 42 -~2 4H u, 1F~ 6. 37
.12--5.18
.1H--3.24
3.17.0.24
U. 17~.f. 37
.17.~0.37
IB/T 85781997
0. 56 -- D. BC
0. 46~~2. 74
0. 56~-0. BC
n. =7~ n. 37 I a. 35 -~5. h5: 0-17-~0.37
D.1YU.24:
20CrMTi n. 17~-G. 23
6. 42- 0. 49 0. 17 --6. 3F
1.40--1.8C
1.4n~1. 96
0, 335
0, 7u~1. 60
0. 70~1. n
1. 0C -- 1. 30
6. 34 -- 2. 15
The level of weak non-gold inclusions, lung-born impurities, fire impurities content should not exceed (10 yuan 61 currently set 2.: level 3. 2.2
3.2.3 The hardness of the camshaft of the normalized steel is 173~2301I55. 3.2.4 The roughness of the camshaft of the normalized steel is flaky. According to GB/1332, the 1~4 grades are qualified. The grain size is selected from YB/T5148 and should not exceed F5 grade. 3.3.5 The strength should meet the relevant provisions of BU and GB3. 3.2 The roughness of the wheel shaft should not be too low. There should be no internal cracks, wrinkles, crosses and white spots. 3.3 Oil quality
3.3.1 The surface of the four-wheel drive should be treated. Non-processing oxidation is not allowed. 3.3.2 The roughness of the camshaft should not be too high. The surface should not be dented, burred, or have any other defects such as burrs, burrs, etc. When the defect is greater than 2mm, it is allowed to have a concave of less than 0.04mm. When the shaft is less than or equal to 2mm, it is allowed to have a concave of less than 0.02mm. 3.3 The wheel shaft should be smooth and flat during processing, and the elasticity is allowed to be not exceeded and the concave is not exceeded. 3.4 Dimensions and tolerances
3.4.1 All dimensional tolerances shall be specified in Table 2.
Central European Control Items
Scientific and practical
Directional dimensions
Convexity Straightness refers to the distance between the theoretical center line of the root drawing and the actual center line> as specified in Table 3. mm ||t t||Cam length
300--52c
2-505--800
2 Standard auxiliary site vertical loss transmission, its technical extraction surface defects disc wave to obtain JB/6729 piece specification.0
4 Inspection method
4.1 Chemical composition
41.1 Sampling position: point wheel polishing work to the body. JB/T8578··1997
4. 1.2 Test method: According to GB/T 223.3, GB/T 223.1, GB/T 223.5, GB/T 228.72, GB/T 227.74 4.2 Test method: According to GB/T 223.1, GB/T 223.2, GB/T 223.5, GB/T 228.72, GB/T 227.74 4.2 Test method: According to GB/T 223.1, GB/T 223.3, GB/T 223.4, GB/T 228.72, GB/T 227.74 4.2 Test method: According to GB/T 223.1, GB/T 223.3, GB/T 223.4, GB/T 228.72, GB/T 227.74 4.2 Test method: According to GB/T 223.1, GB/T 223.3, GB/T 223.4, GB/T 228.72, GB/T 227.74 4.2 Test method: According to GB/T 223.1, GB/T 223.3, GB/T 223.4, GB/T 228.72, GB/T 227.74 4.2 Test method: According to GB/T 223.1, GB/T 223.3, GB/T 228.72, GB/T 227.74 4.2 Test method: According to GB/T 223.1, GB/T 223.3, GB/T 228.72, GB/T 228.72 228 radiation regulations. 4 acid no underestimated organization
4.5, report sample department official: shoot wool music wood body,
4.5.2 test method: according to the provisions of B225 4. maintenance table should be quality book
daily also check alone.
4. 7 weighing
according to B/T e72) note provisions
4. F size
net square ratio when the inspection continent system daily squeeze not less than 0.2m quantity and exchange quantity. The shaft with small size of the creation according to Figure 1 measurement points.
thank point A
4. cam hair line wwW.bzxz.Net
\ wheel shaft hair control synchronous adjustment bacteria caused by the V-block, its rate of five points according to the product drawing provisions to maintain the percentage of contact and letter support my point door root network The shaft is green and the difference between the maximum and minimum values ​​of the wheel shaft is half of the straightness: 5. Each camshaft must be manufactured by the quality inspection department. Only after passing the inspection can it be put into storage and shipped. 5.2 Factory inspection is carried out according to the provisions of 3.3, 3.4.3.5. 5.3 Type test
5.3.1. The type test is carried out in one of the following situations, and the product is finalized:
h) The structure, material, and process have changed significantly; e) After one year of normal production:
a) When resuming production after a long period of suspension:
e) There is a big difference between the factory inspection or user inspection and the last type inspection: f) When the superior department requires it.
5.3.7 The type test items are 8.2, 3.3, 2, 1.3.b. 5.4 The sampling plan is specified in GB2828 or the supply and demand method is determined by the time supply and demand method. 6. Marking, packaging, transportation, storage
6.! The packaging can be bundled and boxed, and the box card is added to ensure that it will not be damaged during transportation. The weight of each piece should not exceed 51kk
6.2 The product quality certificate signed by the manufacturer shall be attached to the packaging list and the packaging. The product quality must be qualified. The main mark: manufacturer’s name, logo and address:
h) product model and specification number:
) product standard number:
d) inspection date:
6.3 The outside of the carton should be marked with:
a) manufacturer’s name, logo and address:
5) product model, specification and number:
e) product standard number:
) packing date, gross weight:
>"Prevent deformation" and other marks.
6.4 The company should make changes to the packaging to prevent deformation.
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