JB/T 7991.2-2001 This standard is a revision of JB/T 7991.2-1995 "Electroplated Diamond Internal Cutting Saw Blades". The size specifications and abrasive types were added during the revision. This standard specifies the shape, code, size, technical requirements, test methods and inspection rules of electroplated superhard abrasive products - internal cutting saw blades. This standard is applicable to electroplated metal bond superhard abrasive internal cutting saw blades. This standard was first issued in June 1987 as GB 8066-87, and the standard number was adjusted to JB/T 7991.2-95 in April 1996. This is the first revision. JB/T 7991.2-2001 Electroplated Superhard Abrasive Products Internal Cutting Saw Blades JB/T7991.2-2001 Standard download decompression password: www.bzxz.net

ICS25.100.70
Machinery Industry Standard of the People's Republic of China
JB/T7991.2—2001
Electroplated superabrasive products
Inner cutting saw blades
Electroplated superabrasive productsInnerslicing disc
Published on March 29, 2001
China Machinery Industry Federation
Implemented on July 1, 2001
JB/T7991.2—2001
This standard is a revision of JB/T7991.2-1995 "Electroplated diamond inner cutting saw blades". This standard has made corresponding supplements to the contents of JB/T7991.2-1995, adding size specifications and abrasive types. The name of this standard has been changed to "Electroplated superabrasive products inner cutting saw blades". This standard replaces JB/T7991.2-1995 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 Abrasives and Grinding Tools. The drafting unit of this standard: Suzhou Grinding Wheel Factory. The participating drafting unit of this standard: Sixth Grinding Wheel Factory. The main drafters of this standard: Chen Baoheng, Mo Yunshui, Xue Mingzhang. This standard was first issued as GB806687 in June 1987, and the standard number was adjusted to JB/T7991.2-1995 in April 1996. This is the first revision.
Mechanical Industry Standard of the People's Republic of China
Electroplated superabrasive products
Inner slicing disc
Electroplated superabrasive productsInner slicing disc
This standard specifies the inspection rules for electroplated superabrasive products.
JB/T 7991.22001
JB/T7991.2-1995
- The shape, code, size, technical requirements, test methods and other characteristics of internal circular cutting saw blades. This standard applies to electroplated metal bond superhard abrasive internal circular cutting saw blades. 2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) GB/T2828—1987
GB/T 6405—1994
GB/T6406—1996
GB/T6408—1986
JB/T7989—1997
3 Shape and code
3.1 Shape
Varieties of artificial diamond and cubic boron nitride
Superhard abrasives Diamond or cubic boron nitride particle size Technical conditions for cubic boron nitride
Superhard abrasives Technical conditions for artificial diamond
The shape of the internal circular cutting saw blade is shown in Figure 1
Figure 1 Shape of internal circular cutting saw blade
3.2 Code
Code for internal circular cutting saw blade: ID
4 Dimensions
The dimensions of the internal circular cutting saw blade shall comply with the provisions of Table 1 and Appendix A. Approved by China Machinery Industry Federation on March 29, 2001, implemented on July 1, 2001
Basic dimensions
Limit deviation
JB/T7991.2—2001
Note: Dimensions and specifications not specified in this standard shall be agreed upon by both parties. 5 Technical requirements
5.1 General requirements
1.5 ± 0.3
1.8 ± 0.3
2.0 ± 0.3
Number of positioning holes
18, 22
5.1.1 The superhard abrasive used in the product shall comply with the provisions of GB/T6405, GB/T6406, GB/T6408 and JB/T7989. 5.1.2 The base material shall be selected from materials with comprehensive performance not lower than 1Cr18Ni9Ti. 5.2 Appearance requirements
5.2.1 The abrasive particles of the coating should be evenly distributed and firmly bonded. There should be no nodules higher than the abrasive particles on the coating. 5.2.2
The coating should not be higher than the abrasive particles.
The coating is not allowed to peel or delaminate.
The inner circular cutting saw blade must be flat and free of creases and rust spots. 5.2.5
6 Test method
6.1 General requirements Inspectionwww.bzxz.net
JB/T7991.2—2001
When the product is delivered for inspection, its construction documents should be consistent with the product and its logo, and visual inspection should be carried out according to general requirements. 6.2 Appearance inspection
Use a reading microscope with a magnification of 20 times to check the following items. 6.2.1 Abrasive distribution uniformity
When the space between the abrasive particles is less than the position that the five abrasive particles should occupy, it is considered uniform. 6.2.2 Abrasive bonding strength
Use a thin steel sheet with a hardness of ≥54HRC to scrape the working surface of the product back and forth for five times. If there is no pit, it is considered to be firmly bonded. 6.2.3 Nodules and coatings
Those with nodules and coating thickness lower than the abrasive particles are qualified. 6.2.4 Peeling or delamination
Put the cutting saw blade flat and scrape the abrasive coating with a small putty knife. If there is no peeling or delamination, it is qualified. 6.2.5 Check creases and rust spots visually.
6.3 Dimension inspection
6.3.1 Measure the ring width with a vernier caliper with a graduation value of 0.02mm. 6.3.2 Check the thickness with a special measuring instrument.
7 Inspection rules
7.1 Products must be inspected according to the technical requirements of this standard before leaving the factory. Only qualified products can leave the factory, and a certificate of conformity is attached. 7.2 100% inspection of appearance.
7.3 Other items shall be sampled and inspected in accordance with GB/T2828. 7.3.1 Sampling inspection shall adopt special inspection level S-1. 7.3.2 Sampling inspection shall adopt GB/T2828-1987 Table 3-Normal Inspection Sampling Plan. 7.3.3 Product qualified quality level (AQL) is 2.5. 8 Marking and packaging
8.1 Marking
8.1.1 Product marking
a) Factory name, trademark:
b) Abrasive brand:
c) Abrasive grain size;
d) Thickness;
e) Production date or batch number.
The marking shall be clear, standardized and firm, and shall meet the storage and preservation requirements. 8.1.2 Marking of outer packaging
a) Manufacturer name, address, trademark;
b) Product name, model:
c) Certificate of conformity attached.
8.1.3 Marking of certificate of conformity
a) Manufacturer name, trademark;
b) Product name;
c) Product mark:
d) Inspection date;
e) Inspection stamp.
8.2 Packaging
JB/T7991.2-2001
8.2.1 Inner packaging: Packed with soft materials, and each piece is separated by soft objects. 8.2.2 Outer packaging: It should be safe and reliable and meet the relevant transportation regulations. 8.2.3 Export products shall comply with the contract requirements.
8×43 through holes evenly distributed
(or 8x42 through holes evenly distributed)
JB/T7991.2—2001
Appendix A
(Standard Appendix)
Inner circle cutting saw blade size
22°30°
2x08 positioning holes
10×Φ3 through holes evenly distributed
(or 8×42 through holes evenly distributed)
4205 ± 0.2
(or $212±0.2
Φ206mm inner circle cutting saw blade (18 holes)
2*4 positioning holes
Figure A2Φ246mm inner circle cutting saw blade (22 holes) 8 through holes evenly distributed
+172 ±0.1
20×8 through holes evenly distributed
8x3 through holes evenly distributed
(or x according to even distribution)
$232 ±0.3
4205 ±0
(@212±0.2)
JB/T7991.2-2001
11*15±4
2×48 positioning holes
10×$3 through holes evenly distributed
(8×2 through holes evenly distributed)
$232 ± 0.2
$205 ±0.2
(or ±212±0.2)
Φ246mm inner circle cutting saw blade (18 holes)
36°±5
2xg fixed package management
Figure A4Φ246mm inner circle cutting saw blade (22 holes) 6×68 through holes evenly distributed
20 through holes evenly distributed
JB/T7991.2—2001
2X service information positioning|| tt||16x48 open evenly distributed
8x through hole evenly distributed
*x through hole evenly distributed)
271mm inner circle cutting saw blade (18 holes)
Measurement evenly distributed
12x through several evenly distributed
x42)
Fixed inspection agent
Figure A6Φ360mm inner circle cutting saw blade (26 holes)
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