Round and square perforation plate screens--Thickness of below 3mm

GB/T 10612-1989 Plate thickness GB/T10612-1989 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Round and square perforation platescreens-Thickness of below 3 mmGB 10612-89
This standard adopts the international standard ISO7805/2-1986 "Industrial sieve plates-Part 1: Thickness <3 mm".
1 Subject content and scope of application
This standard specifies the type, parameters, technical requirements, inspection rules and marking, packaging, transportation and storage of round and square perforation platescreens with a thickness of less than 3 mm.
This standard applies to sieve plates for screening with a thickness of less than 3 mm, with a basic size range of 0.5 to 10 mm for round holes and 2 to 10 mm for square holes.
2 Reference standards
GB 1804
GB3943
Tolerances and fits Limit deviations of dimensions without tolerances Circular and long hole sieves
Rust-proof packaging
GB4879
GB5329
GB7350
GB 10061
3 Terms and symbols
Test sieves and screening tests
Technical conditions for waterproof packaging
Marking method of sieve plates
Edge width (edge ​​width): the distance between the edge of the sieve plate and the outer edge of the outermost row of holes. Other terms are in accordance with the provisions of GB5329.
p Basic size of hole spacing;
W Basic size of sieve holes;
r Radius of fillet.
4 Types and parameters
4.1 The arrangement of holes shall comply with the provisions of GB10061. Round holes: T-type arrangement (as shown in Figure 1);
Square holes: U-type arrangement (as shown in Figure 2);
Square holes: Z-type arrangement (as shown in Figure 3).
Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on February 28, 1989254
Implemented on January 1, 1990
4.2 Basic parameters and dimensions
GB10612-89
4.2.1 The basic dimensions of the sieve holes are divided into the first series, the second series and the third series, and the first series is preferred. 4.2.2 The basic parameters and dimensions of the round hole sieve plate shall comply with the provisions of Table 1. 235
GB 10612--89www.bzxz.net
4.2.3 The basic parameters and dimensions of the square hole sieve plate shall comply with the provisions of Table 2. 4.2.4 The limit deviation of the length and width of the screen plate shall comply with the provisions of tolerance grade h14 in GB1804. If the user has special requirements, it shall be agreed upon by both the supplier and the buyer.
Basic dimension W
Limit deviation
First series
Third series
Second series
Basic dimension
Limit deviation
Opening ratio
First series
Basic dimension W
Second series
Third series
GB 10612-89
Continued Table 1
Limit deviation
Basic dimension
Limit deviation
±0,15
Opening ratio
First series
Basic dimension W
Second series
Third series
GB 10612—89
Continued Table 1
Limit Deviation
Basic Dimension
Limit Deviation
Opening Ratio
First Series
Basic Dimension W
Second Series
Third Series
GB 10612—89
Continued Table 1
Limit Deviation
Basic Dimension
Limit Deviation
Opening Ratio
First Series
Basic Dimension W
Second Series
Third Series
GB 10612--89
Continued Table 1
Limit Deviation
Basic Dimension
Limit Deviation
Opening Ratio
First Series
Basic Dimension W
Second Series
Third Series
Note: ①The percentage of opening ratio is for reference, R40
GB 10612-89
Continued Table 1
Limit Deviation
Basic Dimension
Limit Deviation
②The basic dimension of hole spacing is allowed to be rounded up according to the production and use requirements in accordance with Article 4.5 of GB321 (Priority Number and Priority Number System). ③The basic dimensions of sieve holes in brackets are allowed to be selected in coal quality analysis. mm
Opening Rate
First Series
Basic Dimension W
Second Series
Third Series
GB 10612-89
Limit Deviation
Basic Dimension
Limit Deviation
Opening Rate
First Series
Basic Dimension W
Second Series
Third Series
GB 10612--89
Continued Table 2
Limit Deviation
Basic Dimension
Limit Deviation
Opening Ratio
Basic Dimension w
First Series
Second Series
Note: ①The opening ratio percentage is a reference value,
Third Series
GB10612—89
Continued Table 2
Limit Deviation
Basic Dimension
Limit Deviation
±0,50
②The basic dimension of hole spacing is allowed to be rounded up according to the requirements of production and use in accordance with Article 4.5 of GB3211 priority number and priority number system. mm
Opening rate
4.2.5 The two diagonals of the sieve plate should be equal, and its basic size is the theoretical calculated value of the diagonal of the sieve plate. The size limit deviation should comply with the provisions of tolerance grade h15 in GB1804.
4.2.6 The width of the sieve plate margin should be agreed upon by both parties, and the limit deviation of the sieve plate margin should be in accordance with the provisions of Table 3. Table 3
Basic size of hole spacing p
3.15-~5.00
>5.00~20.0
Limit deviation of the width of the sieve plate margin
4.2.7 The thickness of the sieve plate shall be agreed upon by both parties, and the selected plate thickness shall be less than the sieve hole size and less than the rib width of the sieve plate. 4.3 The sieve hole marking shall comply with the provisions of GB10061. 261
5 Technical requirements
5.1 The material grade of the sieve plate shall be agreed upon by both parties. GB 10612—89
5.2 The sieve plate shall meet the requirements of the dimensions and limit deviations specified in this standard. 5.3 The sieve plate shall be punched from one side, and the punched surface shall not have burrs. The maximum fillet radius of the square hole of the sieve plate is calculated as follows: 5.4
rmax = 0. 05 W + 0. 30 mm
5.5 The sieve plate is not allowed to have cracks or peeling.
5.6 The sieve plate is not allowed to have defects such as broken tendons, incomplete punching, and missed punching (excluding process missed punching). 5.7 Anti-rust measures shall be taken for the sieve plate.
6 Test methods and inspection rules
6.1 The sieve plate shall be inspected and qualified by the technical inspection department of the manufacturer in accordance with the provisions of this standard before it can be shipped out of the factory. 6.2 The length and width of the sieve plate, the width of the margin of the sieve plate, the diagonal size, the size of a single sieve hole, the average sieve hole size, the single hole spacing and the average hole spacing size shall be tested. The method is in accordance with the provisions of Article 6.3. 6.3 First, visually inspect the overall condition of the sieve plate on the sieve surface, and then measure in the area with large errors or any selected area. Measure 20 consecutive sieve holes in any direction to determine the average sieve hole size and the average hole spacing size. If the number of holes in one direction is less than the minimum number of holes specified, then measure in the direction with the largest number of holes, and measure the single sieve hole size and the single hole spacing size in the area with large errors. 6.4 The sieve hole size is checked with a vernier caliper or a plug gauge. 6.5 The hole spacing is checked with a vernier caliper.
6.6 The length and width of the sieve plate and the margin width are checked with a steel tape measure. 6.7 The inspection rules are agreed upon by the supply and demand parties.
7 Marking, packaging, transportation, storage
7.1 The sieve plate leaving the factory must be accompanied by a quality inspection certificate. 7.2 The sieve hole mark and factory mark should be marked on the sieve plate. 7.3
The packaging, transportation and storage of the sieve plate should be waterproof and rust-proof. Waterproof and anti-rust measures should comply with GB7350.Relevant provisions of GB4879.
The following contents shall be marked on the outside of the package:
Manufacturer name;
Sieve hole mark, sieve plate length and width;
Number of sieve plates (sheets),
Box (package) outer dimensions and gross weight:
Factory number and date.
Additional notes:
This standard is under the jurisdiction of the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry, with participation from the Hunan Yueyang Wujiang Screen Factory and the Beijing Coal Chemistry Research Institute.
The main drafters of this standard are Li Ning, Liu Qiku and Chen Lizhu. 26 yuan
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