Some standard content:
JB/T10039--1999
This standard is a revision of ZBJ43003-87 "Slow Feed Power Grinding Wheel". The technical content of this standard is consistent with that of ZBJ43003-87. According to the requirements of GB/T2484-1994 "Codes and Marks for Common Abrasives", the shape code and size mark of the grinding wheel have been modified; the angle of the bowl-shaped grinding wheel is no longer marked, and the bottom diameter J and the inner bottom diameter K of the grinding wheel are marked instead. The values of J and K are calculated according to the angle in the original standard. At the same time, the test methods, inspection rules, packaging, marking and other contents are added. The name of the standard is changed to "Common Abrasive Deep Cut Slow Feed Grinding Wheel" and it has been re-edited in accordance with relevant regulations. This standard replaces ZBJ43003-87 from the date of implementation. Appendix A, Appendix B and Appendix C of this standard are all standard appendices. This standard is proposed and managed by the National Technical Committee for Standardization of Abrasives and Grinding Tools. The drafting unit of this standard: Beijing Grinding Wheel Factory. The main drafters of this standard are: Peng Chunling, Wang Hong, Xie Jie, Lin Changfu, Li Mingwei. This standard was first issued in January 1988.
1 Scope
Machinery Industry Standard of the People's Republic of China
Deep cut and creep feed grinding wheel
Ordinary abrasives
Bonded abrasive products-
Deep cut and creep feed grinding wheelJB/T 10039—1999
Replaces ZBJ43003-87
This standard specifies the product classification, technical requirements, test methods, inspection rules, packaging and marking of deep cut and creep feed grinding wheel (also known as creep feed strong grinding wheel, hereinafter referred to as grinding wheel). This standard is applicable to ceramic bond deep cut and creep feed grinding wheel. 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 will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T2476-1994Codes for common abrasives
GB/T 2477-1983
Abrasive particle size and composition
GB/T2484-1994Codes and markings for common abrasive toolsGB/T2490-1984Methods for testing the hardness of abrasive tools by sandblasting hardness machineGB/T2492-1984
Test method for static balance of grinding wheels and value of imbalanceGB/T 2493-1995
Test method for rotation of grinding wheels
GB 24941995
Safety rules for abrasive tools
GB/T 2495--1996
GB/T 2828--1987
JB/T 7992-1995
JB/T 8339--1996
3 Product classification
3.1 Shape and size
Common abrasive tool packaging
Batch inspection counting sampling procedure and sampling table (applicable to continuous batch inspection) Inspection method of abrasive tools
Determination method of common abrasive tool organization number
The shape and size of the grinding wheel are shown in Figures 1 to 4 and Tables 1 to 4. 3.1.1 Flat grinding wheel Code: 1
Approved by the State Machinery Industry Bureau on May 20, 1999 504
Implemented on January 1, 2000
3.1.2 Single-sided concave grinding wheel
Code: 5
JB/T10039-1999
Bowl-shaped grinding wheel
Code: 11
JB/T 10039--1999
22, 5
Disc-shaped No. 2 grinding wheel
Code: 12b
JB/T10039-1999
3.2 The abrasive and its particle size used for the grinding wheel shall comply with the provisions of GB/T2476 and GB/T2477. 3.3 The hardness classification and code of the grinding wheel are shown in Table 5, Table 5
C, D, E, F
3.4 The maximum working speed of the grinding wheel is 35m/s. 3.5 The marking of the grinding wheel shall comply with the provisions of Chapter 5 of GB/T2484+
4 Technical Requirements
G, H, J
-1994.
4.1 The limit deviations of the basic dimensions of grinding wheels are shown in Tables 6 to 12. 4.1.1 Outer diameter D
Grinding wheel outer diameter D
>200～400
Thickness T
Grinding wheel thickness T
>16～40
Limit deviation
Limit deviation
5,8,10,12
4.1.3 Aperture H
Grinding wheel aperture H
>18～30
>30～50||tt ||>50～80
>80～180
>180～250
>250～315
Groove diameter P
Groove diameter P
Groove depth F
Groove depth F
>16～40
Bottom thickness E of bowl-shaped grinding wheel
Cylindrical surface thickness U and ring end face width W
Cylindrical surface thickness U and
Ring end face width W
The geometric and position tolerances of grinding wheels are shown in Table 13.
JB/T10039—1999
12b Grinding wheel cylindrical surface thickness U
Parallelism of both end surfaces
Outer diameter D
Limit deviation
Limit deviation
Limit deviation
Limit deviation
11, 12h Grinding wheel ring end surface width W
Groove diameter P
4.3 Grinding wheel shall not have cracks, black core and mute sound. JB/T 10039--1999
4.4 Grinding wheels with an outer diameter of 150mm and larger shall be subjected to static balance test. 4.5 Grinding wheels with an outer diameter of 150mm and larger shall be subjected to rotation test. 4.6 The relationship between the organization number and abrasive rate of the grinding wheel is shown in Table 14. Table 14
Organization number
Abrasive grain rate, %
Grinding wheels should be subjected to hardness tests.
5 Test methods
The test methods for appearance defects, dimensional deviations, and geometric tolerances of grinding wheels shall be carried out in accordance with the provisions of JB/T7992. 5.1
5.2 The static balance test method of grinding wheels shall be carried out in accordance with the provisions of GB/T2492. 5.3 The rotation test of grinding wheels shall be carried out in accordance with the provisions of GB/T2493. 5.4 The determination of the organization number of grinding wheels shall be carried out in accordance with the provisions of JB/T8339. 14
5.5 The hardness of grinding wheels shall be tested in accordance with Appendix A (Appendix to the standard) "Test method for hardness of deep-cut creep-feed grinding wheels" of this standard. 6 Inspection rules
6.1 The factory (or acceptance) inspection of products shall be carried out in accordance with the provisions of Chapters 4 and 5. 6.2 The grinding wheel rotation test shall be fully inspected according to the provisions of JB/T7992, and other inspection items shall be sampled and inspected according to GB/T2828. The sampling plan adopts the sub-sampling plan.
The inspection level adopts the general inspection level II. The classification of non-conforming items and the qualified quality level (AQL) are shown in Table 15. Table 15
Class B non-conforming 1
Class B non-conforming I
Class C non-conforming
Limit deviation of aperture, static balance, crack, mark error Hardness
Limit deviation of outer diameter and thickness, form and position tolerance, incomplete or unclear mark For Class B non-conforming, count as a single grinding wheel. For Class C non-conforming, count as a single non-conforming item of each grinding wheel. 7 Marking, packaging and storage
7.1 The surface of the grinding wheel should have the following markings:
a) manufacturer's name or trademark;
b) abrasive code;
c) particle size;
d) hardness;
e) maximum working speed;
f) production date.
7.2 The packaging of the grinding wheel shall comply with the provisions of GB/T2495. 7.3 The acceptance, storage, installation and use of the grinding wheel shall comply with the provisions of Chapter 4 and Chapter 5 of GB2494-1995. AQL
JB/T10039--1999
Appendix A
(Appendix of Standard Push)
Test method for hardness of deep-cut slow-feed grinding wheelA1 The hardness of deep-cut slow-feed grinding wheel is tested using a dynamic elastic modulus tester (also known as an audio hardness tester). A1.1 The dynamic elastic modulus tester shall comply with the following provisions: a) Measuring range: E=4×103～110×10°N/mm2; b) Natural frequency response: 30～25kHz; c) Inherent repeatability relative error: 0.2%. A1.2 The working conditions of the dynamic modulus tester shall comply with the following provisions: a) Ambient temperature: 10~+40℃;
b) AC voltage and frequency: 220V±22V, 50Hz±2Hz; c) Relative humidity: ≤80% (40C).
A2 Inspection operation method
A2.1 The operation of the dynamic modulus tester shall be carried out in accordance with the following provisions: A2.1.1 The support of the grinding wheel shall be in accordance with the provisions of Table A1. Table A1
Grinding wheel aperture H, mm
Support mode
Horizontal type
Suspended type
A2.1.2 The striking tool shall be a small hammer made of hard rubber, wood or hard plastic. A2.1.3 Method for measuring the dynamic modulus of elasticity tester reading (R value) Support tools
Randomly provided conical elastic support
Hook with rubber sleeve
a) When horizontal support is adopted, the signal point and the knocking point are respectively 45° to the support rib (see Figure A1). b) When the suspension support is adopted, the positions of the signal point, the knocking point and the support point shall be in accordance with the provisions of Figure A2. c) The dynamic modulus of elasticity tester reading (R value) should be the reading that appears three times repeatedly. Elastic support
Signal point
Elastic support hard rib
Strike point
A2.2 Measurement of grinding wheel dimensions and weight JB/T10039—1999
Signal point
Strike point
Support point
A2.2.1 For flat grinding wheels, the outer diameter D, thickness T and aperture H must be measured to one decimal place, and the mass m must be weighed to the nearest gram.
A2.2.2 For grinding wheels No. 5, 11 and 12b, in addition to the provisions of A2.2.1, the groove depth F, groove diameter P and ring end face width W must be measured to one decimal place.
A2.2.3 The measuring tools shall be in accordance with the provisions of Table A2. Table A2
Measurement of outer diameter D and groove diameter P
Measurement of thickness T and groove depth F
Measurement of hole diameter H and ring end face width W
Weighing of grinding wheel
≥10～50 kg
A2.3 The elastic modulus of the grinding wheel shall be calculated as follows: Inspection tools
Steel ruler
Vernier caliper
Vernier caliper
10kg table scale
50kg bench scale
Tool accuracy
1/1000
1/1000
a) Use the shape factor table [see Appendix B (Standard Appendix)] to calculate the elastic modulus of the flat grinding wheel (3.30≤D/T≤25) according to formula (A1):
Where: E-
Elastic modulus, 103N/mm;
Mass of grinding wheel, g;
-Shape factor;
RDynamic modulus measuring instrument reading, s;
Thickness of grinding wheel, mm.
(keep two decimal places)
b) Calculate the elastic modulus of grinding wheels of different shapes in Table A3 according to formula (A2): E=
Wherein: E-elastic modulus, 103N/mm2; density of grinding wheel, g/cm;
outer diameter of grinding wheel, mm;
reading of dynamic elastic modulus measuring instrument, s;
shape factor (see Table A3).
(Keep two decimal places)
.....+.(Al )
（A2）
Grinding wheel shape
M-7.35+13518.63/A2
JB/T10039-1999
Formula for calculating shape factor M
A-65082y3-- 42.443073 +58875+67.75882 --992.0665-37.592-619+62595-20083+59.871 38 0.004 9
±/W)×(1 543. 1+3 915. 469--8 781. 68-6 164. 508+13 140. 5g+44 082.6982-12116.8883--58 545.638)W-
Basic size of the end face width of a bowl-shaped grinding wheel ring: W female-the actual size of the end face width of the bowl-shaped grinding wheel ring, 0---T/D;
—H/D.
E(P-H)2F/TI+H2
Outer diameter of grinding wheel, mm;
Where: n----
H-grinding wheel aperture, mm;
T---grinding wheel thickness, mm;
F---single-sided concave grinding wheel groove depth, mml; P-single-sided concave grinding wheel groove diameter, mm.
According to the measured elastic modulus, determine the hardness grade of the grinding wheel according to the provisions of Table A4 A3
Hardness grade
Elastic modulus
(E) value
Appendix B
(Standardized Appendix)
Shape factor table
This appendix is applicable to find out the shape factor M used to calculate the elastic modulus. B1
B2The scope of application of this appendix is as follows: B2.1 Flat series
B2.2The ratio of outer diameter D to thickness T shall satisfy: 3.30≤D/T≤25
B3The table lookup method shall be in accordance with the following provisions:
10°N/mm2
B3.1Calculate the ratio D/T of outer diameter D to thickness T and the ratio H/D of hole diameter H to outer diameter D. The calculation accuracy shall be taken to the decimal place and two places respectively.
B3.2 Find the corresponding column in Table B1 according to the ratio D/T. B3.3 Find the corresponding row in Table B1 according to the ratio H/D. B3.4 The value corresponding to the intersection of the row and column is the shape factor M. 512
JB/T 10039-1999
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JB/T10039—1999
Table B1 (continued)
48815003 The elastic modulus of the grinding wheel is calculated as follows: Inspection tools: Steel ruler Vernier caliper Vernier caliper 10kg table scale 50kg bench scale Tool accuracy 1/1000 1/1000 1/1000 a) Use the shape factor table [see Appendix B (Standard Appendix) to calculate the elastic modulus of the flat grinding wheel (3.30≤D/T≤25) according to formula (A1): Where: E - elastic modulus, 103N/mm; Mass of grinding wheel, g; - shape factor; R dynamic modulus measuring instrument reading, s; thickness of grinding wheel, mm.
(keep two decimal places)
b) Calculate the elastic modulus of grinding wheels of different shapes in Table A3 according to formula (A2): E=
Wherein: E-elastic modulus, 103N/mm2; density of grinding wheel, g/cm;
outer diameter of grinding wheel, mm;
reading of dynamic elastic modulus measuring instrument, s;
shape factor (see Table A3).
(Keep two decimal places)
.....+.(Al )
（A2）
Grinding wheel shape
M-7.35+13518.63/A2
JB/T10039-1999
Formula for calculating shape factor M
A-65082y3-- 42.443073 +58875+67.75882 --992.0665-37.592-619+62595-20083+59.871 38 0.004 9
±/W)×(1 543. 1+3 915. 469--8 781. 68-6 164. 508+13 140. 5g+44 082.6982-12116.8883--58 545.638)W-
Basic size of the end face width of a bowl-shaped grinding wheel ring: W female-the actual size of the end face width of the bowl-shaped grinding wheel ring, 0---T/D;
—H/D.
E(P-H)2F/TI+H2
Outer diameter of grinding wheel, mm;
Where: n----
H-grinding wheel aperture, mm;
T---grinding wheel thickness, mm;
F---single-sided concave grinding wheel groove depth, mml; P-single-sided concave grinding wheel groove diameter, mm.
According to the measured elastic modulus, determine the hardness grade of the grinding wheel according to the provisions of Table A4 A3
Hardness grade
Elastic modulus
(E) value
Appendix B
(Standardized Appendix)
Shape factor table
This appendix is applicable to find out the shape factor M used to calculate the elastic modulus. B1
B2The scope of application of this appendix is as follows: B2.1 Flat series
B2.2The ratio of outer diameter D to thickness T shall satisfy: 3.30≤D/T≤25
B3The table lookup method shall be as follows:
10°N/mm2bzxZ.net
B3.1Calculate the ratio D/T of outer diameter D to thickness T and the ratio H/D of hole diameter H to outer diameter D. The calculation accuracy shall be taken to the decimal place and two places respectively.
B3.2 Find the corresponding column in Table B1 according to the ratio D/T. B3.3 Find the corresponding row in Table B1 according to the ratio H/D. B3.4 The value corresponding to the intersection of the row and column is the shape factor M. 512
JB/T 10039-1999
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JB/T10039—1999
Table B1 (continued)
48815003 The elastic modulus of the grinding wheel is calculated as follows: Inspection tools: Steel ruler Vernier caliper Vernier caliper 10kg table scale 50kg bench scale Tool accuracy 1/1000 1/1000 1/1000 a) Use the shape factor table [see Appendix B (Standard Appendix) to calculate the elastic modulus of the flat grinding wheel (3.30≤D/T≤25) according to formula (A1): Where: E - elastic modulus, 103N/mm; Mass of grinding wheel, g; - shape factor; R dynamic modulus measuring instrument reading, s; thickness of grinding wheel, mm.
(keep two decimal places)
b) Calculate the elastic modulus of grinding wheels of different shapes in Table A3 according to formula (A2): E=
Wherein: E-elastic modulus, 103N/mm2; density of grinding wheel, g/cm;
outer diameter of grinding wheel, mm;
reading of dynamic elastic modulus measuring instrument, s;
shape factor (see Table A3).
(Keep two decimal places)
.....+.(Al )
（A2）
Grinding wheel shape
M-7.35+13518.63/A2
JB/T10039-1999
Formula for calculating shape factor M
A-65082y3-- 42.443073 +58875+67.75882 --992.0665-37.592-619+62595-20083+59.871 38 0.004 9
±/W)×(1 543. 1+3 915. 469--8 781. 68-6 164. 508+13 140. 5g+44 082.6982-12116.8883--58 545.638)W-
Basic size of the end face width of a bowl-shaped grinding wheel ring: W female-the actual size of the end face width of the bowl-shaped grinding wheel ring, 0---T/D;
—H/D.
E(P-H)2F/TI+H2
Outer diameter of grinding wheel, mm;
Where: n----
H-grinding wheel aperture, mm;
T---grinding wheel thickness, mm;
F---single-sided concave grinding wheel groove depth, mml; P-single-sided concave grinding wheel groove diameter, mm.
According to the measured elastic modulus, determine the hardness grade of the grinding wheel according to the provisions of Table A4 A3
Hardness grade
Elastic modulus
(E) value
Appendix B
(Standardized Appendix)
Shape factor table
This appendix is applicable to find out the shape factor M used to calculate the elastic modulus. B1
B2The scope of application of this appendix is as follows: B2.1 Flat series
B2.2The ratio of outer diameter D to thickness T shall satisfy: 3.30≤D/T≤25
B3The table lookup method shall be in accordance with the following provisions:
10°N/mm2
B3.1Calculate the ratio D/T of outer diameter D to thickness T and the ratio H/D of hole diameter H to outer diameter D. The calculation accuracy shall be taken to the decimal place and two places respectively.
B3.2 Find the corresponding column in Table B1 according to the ratio D/T. B3.3 Find the corresponding row in Table B1 according to the ratio H/D. B3.4 The value corresponding to the intersection of the row and column is the shape factor M. 512
JB/T 10039-1999
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JB/T10039—1999
Table B1 (continued)
4881500
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