JB/T 7991.3-2001 JB/T 7991.3-2001 Electroplated superhard abrasive products Assorted files JB/T7991.3-2001 Standard download decompression password: www.bzxz.net

JB/T 7991.3—2001
This standard is a revision of JB/T7991.3-1995 "Electroplated Diamond Files". This standard supplements the content of JB/T7991.3-1995 accordingly, adding size specifications and abrasive types. The name of this standard is changed to "Electroplated Superhard Abrasive Products Files". This standard replaces JB/T7991.3-1995 from the date of implementation. 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 units of this standard: Sixth Grinding Wheel Factory. The main drafters of this standard: Chen Baoheng, Mo Yunshui, Xue Mingzhang. This standard was first issued in June 1987 as GB8067-87, and the standard number was adjusted to JB/T7991.3-1995 in April 1996. This is the first revision.
Mechanical Industry Standard of the People's Republic of China
Electroplated superabrasive products
Assorted files
Electroplated superabrasive productsFilesJB/T 7991. 3—2001
Replaces JB/T7991.3-1995
This standard specifies the shape, size, technical requirements, test methods and inspection rules of electroplated superabrasive products - assorted files. This standard applies to electroplated metal bond superabrasive assorted files. 2 Cited 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 versions of the following standards. GB/T2828-1987 Sampling procedure and sampling table for batch inspection by counting (applicable to inspection of continuous batches) GB/T 6405-1994
Varieties of artificial diamond and cubic boron nitride
GB/T 6406-1996
Superhard abrasive Diamond or cubic boron nitride particle size GB/T 6408--1986
Technical conditions for cubic boron nitride
JB/T 7989-1997
3 Shape and size
Superhard abrasive Technical conditions for artificial diamond
The shape of electroplated superhard abrasive assorted files shall comply with the provisions of Figure 1 and Figure 2, and the size shall comply with the provisions of Table 1. r
Figure 1 Flat head type
Figure 2 Pointed head type
Approved by Central and South Machinery Industry Federation on 2001-03-29 238
Implementation on 2001-07-01
Semi-circular file
Circular flat file
Knife-shaped file
Triangular file
Oval file
Section shape
JB/T 7991. 3-2001
Working surface diameter
Working surface length
Triangular chain
Section shape
JB/T 7991. 3--2001
Table 1 (End)
Note: Dimensions and specifications not specified in this standard shall be agreed upon by the supply and demand parties. Technical requirements
4.1 General requirements
Working surface diameter
Working surface length
The superhard abrasives used in the products shall comply with the provisions of GB/T6405, GB/T6406, GB/T6408 and JB/T7989. 4.1.2The substrate hardness shall not be less than 56HRC.
4.2 Appearance requirements
The abrasive particles of the coating shall be evenly distributed and firmly combined. There shall be no tumors higher than the abrasive particles on the coating. The coating shall not be higher than the abrasive particles.
The substrate surface of the non-abrasive layer shall have a decorative coating. The coating is not allowed to peel or delaminate.
There shall be no burrs, pits or rust spots on the product surface. 4.3 Dimensional deviation
The dimensional deviation of the product shall comply with the provisions of Table 2.
Thickness T
Diameter D
Length of abrasive layer L2
Total length L
Shaft diameter d
5Test method
5.1 General requirements inspection
JB/T 7991. 3--2001
When the product is inspected, its construction documents shall be consistent with the product and its logo, and visual inspection shall be carried out according to general requirements. 5.2 Appearance inspection
Use a reading microscope with a magnification of 20 times to inspect the following items. 5.2.1 Abrasive distribution uniformity
When the gaps between abrasive particles are less than the space that five abrasive particles should occupy, it is considered uniform. 5.2.2 Abrasive bonding strength
Use a scissor file to file the edge of a YG8 (or YG6) carbide block at an angle of 45°, back and forth five times, and observe the working surface of the product. If there is no pit, it is considered to be firmly bonded.
5.2.3 Nodules and coatings
The height of the nodules and the thickness of the coating are lower than the abrasive particles. 5.2.4 Abrasive coating and substrate bonding strengthwwW.bzxz.Net
Clamp the handle of the scissor file in a vise, and use a small flat-head carving knife to scrape the abrasive coating. If there is no layering, it is qualified. 5.2.5 Visual inspection of the protective decorative layer.
5.2.6 Visual inspection of rust spots and burrs.
5.3 Dimension inspection
Use a vernier caliper with a graduation value of 0.02mm to check the dimensions of the product. 6 Inspection rules
6.1 Products must be inspected according to the technical requirements of this standard before leaving the factory. Only qualified products can leave the factory and attach a certificate of conformity. 6.2 100% appearance inspection.
6.3 Other items shall be sampled and inspected in accordance with GB/T2828. 6.3.1 Sampling inspection adopts special inspection level S-1. 6.3.2 Sampling inspection adopts GB/T2828-1987 Table 3--Normal Inspection Sampling Plan. The product quality level (AQL) is 2.5.6.3.3
7 Marking and packaging
7.1 Marking
7.1.1 Product marking
The end face of the handle of the assorted files should be marked with a firm color mark to indicate the particle size of the diamond abrasive: 100/120 coarse
No color;
120/140-140/170--
170/200~~200/230
Red:
Blue:
230/270 fine-yellow.
7.1.2 External packaging marking
a) Manufacturer's name, address, trademark;
b) Product name, model:
c) Attached with the certificate of conformity.
7.1.3 Certification mark
a) Factory name, trademark;
b) Product name;
c) Product mark,
d) Inspection date;
e) Inspection stamp.
7.2 Packaging
JB/T 7991. 3—2001
7.2.1 Inner packaging: Packed with soft materials, products should be separated. 7.2.2 Outer packaging: Should be safe and reliable, and comply with relevant transportation regulations. 7.2.3 Export products shall comply with contract requirements.
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