This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of cross-cutting roller cutters. This standard applies to cross-cutting roller cutters used in single-blade or double-blade paper cutters in the papermaking industry. QB/T 1566-1992 Cross-cutting roller cutters QB/T1566-1992 Standard download decompression password: www.bzxz.net

Light Industry Standard of the People's Republic of China
Cross-cutting Roller
Subject Content and Scope of Application
QB/T1566--1992
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of cross-cutting roller cutters. This standard applies to cross-cutting roller cutters used in single-knife or double-knife paper cutters in the papermaking industry. 2 Reference standards
GB/T700 Technical conditions for ordinary carbon structural steelGB/T1299 Technical conditions for alloy tool steelWww.bzxZ.net
GB/T 2828
Counting sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches)Tool heat treatment metallographic inspection standards
ZB J36 003
3 Product classification
Cross-cutting roller knives are divided into two types: the front of the blade steel is raised (Figure 1) and the blade steel is flush with the blade body (Figure 2). Their dimensions should comply with the requirements of Table 1. Blade
Approved by the Ministry of Light Industry of the People's Republic of China in 1992-07~06 Blade angle 85°±1°
Blade steel
85°±
Blade bevel
1993-03-01 Implementation
Length L
Basic size
4 Technical requirements
Limit deviation
Width H
Basic size
QB/T1566—1992
Limit deviation
Basic size
Limit deviation
Basic size
Cross-cutting roller knives shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.1
4.2 Cross-cutting roller knives can be made of one material or a composite of two materials. mm
Blade steel width h
Basic dimensions
4.3 The blade steel of all-steel cross-cutting rollers and steel-inserted cross-cutting rollers shall be made of materials that comply with GB/T1299, and other materials with performance not inferior to that of such steels may also be used. The blade body of the steel-inserted cross-cutting roller is made of carbon structural steel specified in GB/T700. 4.4 The geometric dimensions and tolerances of the cross-cutting roller shall comply with the provisions of Table 1. 4.5 The roughness of the cross-cutting roller shall comply with the provisions of Figures 1 and 2. 4.6 The straightness tolerance of the blade and the straightness tolerance of the front length direction shall comply with the provisions of Table 2. Table 2
Length range
Straightness tolerance of blade and front length direction 950~~1730
1830~2500
4.7 After heat treatment, the hardness of the hardened zone of the cross-cutting roller is HRC57~62, and the hardness difference of the same piece is not more than HRC3. 4.8 The metallographic structure should be tempered martensite, the length of martensite needles should not exceed three levels, and the network carbide should not exceed two levels. 4.9 There should be no defects such as chipping, cracks, and scratches in the hardened zone. 4.10 The welding of the blade and the blade body should be firm and reliable, and there should be no gaps and slag inclusions in the visible places. 5 Test method
The test method of the cross-cutting roller is carried out according to Table 3. 146
Blade angle
Length 1
Width 1
Thickness B
Surface roughness
Blade straightness
Front length square straightness
Metallurgical structure
Appearance requirements
Welding quality
Inspection rules
6.1 Inspection classification
QB/T1566---1992
Determination method
Measure the blade angle at any three points in the length direction. The middle length of the blade width
Measure two points 50mm from both ends of the blade and one point in the middle of the lengthMeasure 50mm from both ends and one point in the middle of the lengthSample block comparison
Put the cutting edge on a flat ruler or a flat ruler, and use a feeler gauge to measure its maximum gapPut the measured part on a flat ruler or a flat plate, and use a feeler gauge to measure its maximum gapMeasure the middle point of the length L and two points at L/4 from both ends. The maximum hardness difference of the three points is the hardness difference of the same piece
Perform according to the provisions of ZBJ36003
Cross-cutting roller knives are divided into factory inspection and type inspection. The factory inspection items are 4.4~4.7, 4.9, 4.10. 6.1.1
Type inspection shall be carried out in any of the following circumstances: when there is a major change in material process that may affect product performance; when there is an objection to product quality;
when the national supervisory agency proposes type inspection; during normal production, random inspection shall be conducted at least once every six months;
when production is resumed after a suspension of more than six months.
6.2 Sampling and batching rules
6.2.1 Factory inspection
Simplified measurement diagram
Measuring tools
Angle ruler
Steel tape measure
Vernier caliper
Vernier caliper
Roughness sample
Flat ruler or flat feeler gauge
Flat ruler or flat feeler gauge
Rockwell hardness tester
Metallographic microscope
6.2.1.1 Gather the same variety and specification of cross-cutting rollers with basically the same production conditions and the same feeding into a batch and submit them for inspection. 6.2.1.2 The quality of cross-cutting rollers is divided into three types of unqualified products: A, B and C. For unqualified products of A and B, AQL is the number of unqualified products per 100 units of products; for unqualified products of C, AQL is the number of unqualified products per 100 units of products. Correspondingly, when implementing sampling inspection, for Class A and Class B non-conformities, A. and R. of the sampling plan are counted by piece, and for Class C non-conformities, A. and R. are counted by item. 6.2.1.3 Provisions on inspection level
For Class A, Class B Group I and Class C, general inspection level I shall be followed, and for Class B Group I, special inspection level S-3 shall be followed. 6.2.1.4 Provisions on strictness
Perform normal inspection.
6.2.1.5 Provisions on sampling plan
Perform the one-time sampling plan specified in GB/T2828. 6.2.1.6 The classification and grouping of unqualified items are shown in Table 4. 147
The blade has cracks;
QB/T1566—1992
The composite blade has gaps in the welded part. The slag thickness does not meet the requirements;
The front and bevel roughness do not meet the requirements;
3 The straightness of the blade and the front of the blade in the length direction does not meet the requirements; 4
There are black spots in the hard zone
The hardness of the hard zone does not meet the requirements;
The hardness difference of the same piece does not meet the requirements
The width does not meet the requirements;
The length does not meet the requirements,
The roughness does not meet the requirements;
Other marks and packaging do not meet the requirements;
The appearance does not meet the requirements;
Other items do not meet the requirements
The designation of the acceptable quality level (AQL) is shown in Table 5. 6. 2. 1. 7
Defect group
6.2.1.8 Determine the test result according to GB/T2828. 6.2.2 Type test
Class B Group I
Class B Group I
6.2.2.1 For type test, randomly select one piece from the products that have passed the factory inspection and test 4.3 and 4.8. 6.2.2.2 If the type test is judged as unqualified, the product should be stopped from acceptance, and the reasons should be analyzed and measures should be taken to eliminate the defects until the new type test is passed.
Marking, packaging, transportation and storage
7.1 Each cross-cutting roller should be clearly printed with the manufacturer's name (or trademark) and manufacturing date in an appropriate position. 7.2 Each cross-cutting roller blade shall be cleaned and dried, coated with anti-rust grease, and packed with moisture-proof paper, and then packed in an ordinary wooden box. Under normal transportation and storage conditions, it will not rust within half a year from the date of leaving the factory. 7.3 The following technical documents shall be attached to the packaging box. Packing list; b. Product certificate; Product instruction manual. 7.4 The following contents shall be clearly indicated on the outside of the packaging box. a. Receiving unit and address; product name and specifications; product gross weight and quantity; manufacturer name and address; date of publication. QB/T 1566—1992 5 The product should be stored in a well-ventilated place, strictly prevent moisture, and cannot be stored together with corrosive items. 7.5
Additional Notes:
This standard was proposed by the Technical Equipment Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Light Industry Machinery Standardization Center. This standard was drafted by Hai'an County Light Industry Machinery Blade Factory and Liuzhou Machinery Blade Factory. The main drafters of this standard are Ji Yongren, Zhou Zhenkui, and Ni Xinxing. From the date of implementation of this standard, the former Ministry of Light Industry standard QB666--1976 "Throwing Force" will be invalid. 149
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