JB/T 9768-1999 This standard is a revision of ZB J92 011-89 "Technical Conditions for Cylinder Head Bolts for Internal Combustion Engines". During the revision, only editorial changes were made according to relevant regulations, and the main technical content remained unchanged. This standard specifies the technical specifications, testing and evaluation methods for the platform honing texture on the inner surface of the cylinder liner. This standard is applicable to the testing of the platform honing texture and surface quality of the inner surface of the cylinder liner of an internal combustion engine processed by the platform honing process. This standard was first issued in 1989. JB/T 9768-1999 Technical Specifications and Testing Methods for Platform Honing Texture on Cylinder Liners of Internal Combustion Engines JB/T9768-1999 Standard Download Decompression Password: www.bzxz.net

ICS 27.020
Machinery Industry Standard of the People's Republic of China
JB/T9768—1999bzxZ.net
Internal combustion engines
Cylinder liners-Specification and inspection for plateau boning cross hatch
Technical specification and inspection method
Internal combustion engines Cylinder liners-Specification and inspection for plateau boning cross hatch1999-09-17 Issued
State Bureau of Machinery Industry
Implemented on 2000-01-01
JB9768--1999
This standard is a revision of ZBJ92011—89 "Technical specification and inspection method for plateau boning cross hatch of internal combustion engines". Editorial changes were made to the original standard during the revision, and the main technical contents remained unchanged. This standard replaces ZB J92 011—89 from the date of implementation. Appendix A of this standard is the appendix of the standard. This standard is proposed and managed by the National Technical Committee for Standardization of Internal Combustion Engines. The drafting unit of this standard is Shanghai Internal Combustion Engine Research Institute. The main drafters of this standard are Chen Zhaozhi, Xu Ruiqin and Su Qinghua. This standard was first issued on May 13, 1989. Machinery Industry Standard of the People's Republic of China
Technical Specification and Inspection Method for Plateau Honing Cross BatebInternal combustion enginesCylinder linersSpecification and inspection for plateau honing cross batebScope
This standard specifies the technical specification, inspection and evaluation methods for plateau honing cross bateb on the inner bore surface of cylinder liners. JB/T 9768-1999
Replaces 2BJ92011-89
This standard is applicable to the inspection of plateau honing cross bateb and surface quality of the inner bore surface of cylinder liners of internal combustion engines processed by plateau honing process. 2 Referenced standards
The clauses contained in the following standards constitute the clauses of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards: GB/T1031--1995 Surface roughness parameters and their values ​​GB3505-1983 Surface roughness: Surface and its parameters 3 Definitions
This standard adopts the following definitions.
Platform honing reticulated surface:
The inner and outer surfaces of the cylinder liner are processed by honing technology into a cross-reticulated surface with deep grooves and small platforms evenly alternating. At the same time, there are certain requirements for the surface reticulation angle of the honing reticulate, the depth and number of grooves, the deflection of the profile figure, the profile support length rate, and the quality of the surface layer. The honing surface with these requirements is called a platform honing reticulated surface. 4 Technical specifications for honing paste reticulation
4.1 Reticulation angle, the angle between the center line of the cylinder liner is 110-~140°, 4.2 Surface roughness R, see Table 1 for the value.
Diameter of cylinder liner m
Average value of R at 5 points
Range of R at 5 points
5 6095
>95~115
4. 3 Profile skewness Sk (= -0.8~ -3.0 ). > 115-135
0.55-1.10
0.44-1.40
≥ 135~160
0.48-1.48
2 160-200
0.65-1.30
0.52-1.60
4. 4 Within the length of 4 mm, the number of grooves of the honing pattern with a depth greater than or equal to 4 μ И shall be at least 5. 4.5 Within the piston ring stroke, the wheel bearing length ratio of the inner surface of the cylinder sleeve shall meet the requirements of Figure 1. Approved by the State Bureau of Machinery Industry on September 17, 1999 μm
3 200-240
2000-01-01 implementation
4.6 The grinding pattern in both directions is even.
JB/T9768-1999
4.7 The pattern is clear, without sharp corners, hair shaving and metal folding, without local bright spots and inclusions.
5 Measuring instruments
5.1 Surface roughness tester or profiler. 5.2 Metallographic microscope or biological microscope.
6 Measurement and evaluation methods
6.1 Measurement and evaluation of R value
Small distribution model
Figure! Curve distribution range
6.1.1 Measurement of R, value: in accordance with the provisions of GB/T1031. At a distance of 50~75mm from the upper end surface of the cylinder sleeve, measure 5 points evenly distributed in the direction of fixation.
6.1.2 Evaluation of R, value: calculate the average value of 5 readings, and the average value should be within the specified value. 6.2 Measurement and evaluation of Sk value
6.2.1 The measuring plate of Sx value is the same as the measuring position of 6.1.1. 6.2.2 Evaluation of S value: only calculate the average value of 5 points, and the average value should be within the specified range. 6.3 Measurement and evaluation of the number of grooves of honing mesh 6.3.1 The measurement position of the number of grooves is the same as 6.t.1, but the wheel rate curve is recorded at one point. Measure a 4mm long wheel rate curve on the measured surface (when the longitudinal magnification of the wheel rate recording curve is 100 times, the recorded curve length is 400mm). Draw a datum line M on the curve line parallel to the center line of the wheel and equal to 5%. Draw a parallel straight line N at a distance of 4 μm from the datum line M. 6.3.2 Evaluation of the number of grooves: Calculate the number of grooves on the profile curve that intersect or are tangent to the straight line N. The number of grooves should be greater than or equal to 5, see Figure 2.
6.4 Measurement and evaluation of the support length ratio
JB/T9768-1999
Figure 24μm deep groove number evaluation
6.4.1 The definition and calculation method of the value shall be in accordance with GB 3505. 6.4.2 The measurement of t, value is carried out on the whole wheel profile curve, that is, the calculation is carried out on 5 evaluation lengths (51). 6.4.31 The evaluation of t, value is carried out on the measured wheel profile curve. Draw a reference line M with t, equal to 5% and parallel to the wheel center line, and use this line as the starting line for calculating the horizontal intercept C of the profile, namely the equal point line. Calculate the t, value under different C values. With t, value (m) as the horizontal coordinate and t, distribution curve is drawn. The curve should be within the specified range. 6.4.4 The value can also be read directly on the surface roughness tester or profiler, but 1, equal to 5% must be used as the calculation zero point of the wheel horizontal intercept C. Calculate the t, value under different horizontal intercepts, and its value should be within the specified range. 6.4.5 Calculation example, see Figure 3.
Drawing method of Figure 3
6.4.5.1 Draw the reference line with t equal to 5%
6.4. 5. 2 Calculate the value of 1 under different horizontal intercepts C of the wheel. The values ​​are shown in Table 2. Table 2
6.4.5.3 Draw the curve of the wheel profile support length ratio, see Figure 4. If the curve is within the specified range, it is judged to be qualified. 6.5 Inspection and evaluation of the reticulation angle and cutting direction 4
6.5.1 Take a replica film photo on the inner nipple surface 50~75mm away from the upper end plane of the cylinder liner [the method for making the replica film photo is shown in Appendix A (Standard Appendix)].
6.5.2 After taking a photo of the replica film, directly measure and observe the intersection of the cutting direction on the photo. The angle should be within the specified range. If it is cut in one direction, it is judged to be unqualified.
6.6 Inspection and evaluation of grinding quality
JB/T9768—1999
Figure 4 Wheel bearing length ratio curve
6.6.1 Prepare a replica film according to 6.5.1 and take a photo or observe it directly under a microscope. 90
1005,%
6.6.2 The inner surface of the cylinder sleeve shall not have defects such as metal tearing and metal folding. In order to facilitate the assessment, the following set of graphs are specially specified as the basis for assessment.
a) High-quality platform reticulated film replication (see Figure 5) a)
Figure 5 High-quality platform honing reticulated film replication photo [100×) JB/T9768-1999
The reticulation is clear, there are no metal fragments, cracks, inclusions and other defects on the surface, and the cutting in both directions is basically uniform; b) Qualified platform honing reticulated film replication photo (see Figure 6) The reticulation is basically clear, and there are a small amount of metal fragments on the surface. There are individual rough marks, no defects such as inclusions, and the cutting in both directions is basically uniform:
Figure 6 Qualified platform grinding reticulated film replication photo (100×) c) Unqualified platform grinding reticulated film replication photo (see Figure) The reticulation is disordered and unclear, and there are a large number of obvious metal fragments and cracks. 7 Reference graph of profile curve
JB/T 9768--1999
Figure 7 Unqualified platform honing pattern replica film photo (100x) In order to control the quality of platform honing pattern, according to the characteristics of surface profile shape, the following two profile curves are provided as reference for evaluation. See Figure 8.
B Inspection
JB/T 9768--1999
a) High-quality platform honing anilox wheel curve (5000×100) HOESON
DIYISION
b) Qualified platform honing anilox wheel from the curve (5000×100) M
center) Unqualified platform honing anilox wheel from this line (200×100) Figure 8 Platform honing anilox contour line
8.1 All cylinder liner products produced by platform honing anilox process should be regularly inspected according to the various clauses of this standard, and the measurement results should be sorted and recorded in Table 3.
8.2 The surface roughness parameters of platform honing anilox that are not specified in this standard can be jointly agreed upon by the supply and demand parties when the user has special requirements, and the detection method is also determined by the demand and demand parties through negotiation. 8
Manufacturer:
Inspector:
Profile support length ratio curve:
Surface wheel curve:
Conclusion:
JB/T 9768—1999
Table 3 Platform honing reticulation inspection record
Cylinder sleeve model number:
Inspector:
Average value
Cylinder number:
Inspection period:
Reticulation angle:
Laminated film:
90JUo t, %
≤4μm deep-drying number:
A1 Preparation of laminating
JB/T9768-1999
Appendix A
(Appendix to the subject)
Methods for preparing laminating, film sheets and laminating photosA1.1 Dissolve cellulose diacetate in acetone solvent at a ratio of 7%~10%, wait for it to be completely dissolved, and let it eliminate bubbles by itself. A1.2 Pour the cellulose diacetate solution on a glass plate to form a transparent, bubble-free film with a thickness of 0.03~0.05mm, and evaporate it to dryness.
A2 Pasting laminating film
A2.1 Cut the pore-free, smooth cellulose diacetate film into small pieces of 20mm×40mm. A2.2 Thoroughly clean the inner surface of the cylinder liner to be inspected with ethanol. A2.3 Drop 1-2 drops of acetone on the part of the cylinder sleeve to be inspected to wet the surface. A2.4 Quickly stick the cut film to the surface of the cylinder sleeve moistened with acetone, and press it with clean, oil-free fingers for about 30 seconds with a pressing force of about 0.2MPa. When pressing the film, the film is not allowed to move in any direction, and then the laminated film is made. A3 Preparation of laminated film photos
A3.1. Stick the prepared laminated film on a glass slide and put it under the objective lens of a microscope. A3.2 Use partial side light or oblique light to shoot the film attached to the cut glass slide, with a magnification of 100×. Note: The photo obtained by this method is an inverted image, because the laminated surface is a negative film, and the grooves on the grinding surface of the cylinder sleeve are protruding spikes on the laminated film t.
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