This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of reed cutting knives (hereinafter referred to as "blades"). This standard applies to the blades used in reed cutting machines in the papermaking industry. QB/T 1564-1992 Reed Cutting Knife QB/T1564-1992 Standard download decompression password: www.bzxz.net

Light Industry Standard of the People's Republic of China
Reed Cutting Knife
1 Subject Content and Scope of Application
QB/T1564—1992
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of reed cutting knives (hereinafter referred to as "blades").
This standard applies to the blades used in the papermaking industry. 2 Reference Standards
GB/T700 Technical Conditions for Ordinary Carbon Structural SteelsGB/T1299 Technical Conditions for Alloy Tool Steels
3 Batch Inspection Count Sampling Procedure and Sampling Table (Applicable to Inspection of Continuous Batch)GB/T 2828
ZBJ36003 Standard for Metallographic Inspection of Tool Heat Treatment 3 Product Classification
3.1 The names of the various parts of the blade are shown in Figure 1.
Blade angle
Fang blade bevel
3.2 The blades are divided into three types: flying blade (Figure 2), bottom blade (Figure 3) and side blade (Figure 4). The dimensions of the blades are as shown in the figure. Approved by the Ministry of Light Industry of the People's Republic of China on July 6, 1992, 132 standard heat exchangers and heat exchanger standards. Implementation date: January 1, 1993. 760±3. QB/T 1564—1992. Figure 2. Type W-1. 4 Technical requirements. 142.5±0.8. 427.5±0.8. Figure 3. Type W-2. 300±1. Figure 4. Type W-3. 4.1 The blades shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved in the prescribed procedures. 4.2 The blade can be made of one material or a composite of two materials. 4.3 The blade steel of all-steel blades and composite blades can be made of materials 9SiCr, CrWMn, 8MnSi, etc. specified in GB/T1299, or other steel grades with performance not lower than these steel grades. 4.4 The blade body material of the composite blade is Q215 and Q235, and its performance should comply with the provisions of GB/T700. The metallographic structure of the hardened zone of the blade should be tempered martensite, the length of the martensite needle should not be greater than the third level, and the network carbide should not be greater than the second level. 4.5 4.6 The hardness of the hardened zone of the blade is HRC52~62, and the hardness difference of the same piece is not greater than HRC3. The welded parts of the blades made of two materials should be firm and reliable, and there should be no gaps or slag inclusions in the visible places. 4.7
The dimensional tolerance and roughness of the blades should comply with the provisions of Figures 2 to 4 of this standard. Geometric tolerance
The straightness of the front length direction of the flying cutter is 1.0mm, and the straightness of the width direction is 0.6mm. The straightness of the front length direction of the bottom cutter is 0.6mm. The straightness of the front length direction of the side cutter is 0.4mm. Blade straightness: 0.3mm for the side cutter and 0.4mm for the bottom cutter. There should be no black spots in the hardened area after grinding. No cracks are allowed on the blade.
4.12 Appearance
The blade surface is not allowed to have defects such as burrs, bumps, scratches, etc. 5 Test method
The test method shall be carried out in accordance with the provisions of Table 1.
Blade Angle
Metallurgical Structure
Test Method
Use a steel tape measure to measure the length of the middle part of the blade width (W-2 type, W-3 type) or the distance between the two points (W-1 type) shown in Figure 2
Use a vernier caliper to measure the width at one point in the middle and two points 50mm away from both ends
Use a micrometer to measure 10mm away from the blade, one point in the middle of the length direction and two points 50mm away from both ends
Use an angle ruler to measure the middle part of the length direction and two points 50mm away from both ends
Press Z BJ36003 is used for
Method 1:
Use vernier caliper to measure L1, L2
qL(L+L2)/2
Method 2:
Use special inspection tools
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Steel tape measurebZxz.net
Vernier caliper
Micrometer
Angle ruler
Metallographic microscope
Vernier caliper
Or special inspection
Straightness
Roughness
QB/T 1564---1992
Continued Table 1
Test method
Put a flat ruler vertically on the blade and use a feeler gauge to measure the maximum gap. When it is convex, insert a feeler gauge of equal thickness at both ends, and then use a feeler gauge to measure the minimum gap. The specific feeler gauge thickness minus the minimum gap is the straightness of this item. Use a roughness sample block for comparison
Select the blade part or the middle part of the hardened zone width, the hardness of the same piece in the length, and the hardness difference of the same piece and the distance from both ends L/4 to measure three points. The maximum hardness difference of the three points is the hardness difference of the same piece
Crack gap slag inclusion appearance
6 Inspection rules
6.1 Inspection classification
Blades are divided into factory inspection and type inspection. Factory inspection items are 4.6 to 4.12.
Type inspection is carried out when one of the following conditions occurs. When there are major changes in materials and processes that may affect product performance; when there are objections to product quality;
When the national supervisory agency proposes type inspection; during normal production, spot checks are conducted at least once every 6 months; when production is resumed after a stop of more than 6 months.
6.2 Sampling and batching rules
6.2.1 Factory inspection
6.2.1.1 The blades of the same variety and specification with basically the same production conditions and the same materials are collected into batches and submitted for inspection. Worker
Blade flat ruler
Roughness sample
Rockwell hardness
6.2.1.2 The unqualified blades are divided into Class A, Class B and Class C. For Class A and Class B unqualified products, AQL is the number of unqualified products per 100 units of products; for Class C unqualified products, AQL is the number of unqualified products per 100 units of products. Correspondingly, when implementing sampling inspection, for Class A and Class B unqualified products, A in the sampling plan. And R. Count by piece (number of non-conforming products), for Class C non-conforming, A. and R. count by item (number of non-conforming). 6.2.1.3 Provisions on inspection level
For Class A, Class B Group 1 and Class C non-conforming, conduct general inspection level I, and for Class B non-conforming Group 2, conduct special inspection level S-3.
6.2.1.4 Provisions on strictness
Conduct normal inspection.
6.2.1.5 Provisions on sampling plan
The sampling plan shall be carried out in accordance with the one-time sampling plan specified in GB/T2828. 6.2.1.6 The classification and grouping of non-conforming items are shown in Table 2.135
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6. 2. 1. 7
The blade has cracks;
QB/T1564—1992
There are gaps and slag inclusions in the visible parts of the composite blade
The thickness exceeds the tolerance;
The roughness of the front and back sides does not meet the requirements; The straightness of the length and width of the blade and the front side exceeds the tolerance; There are black spots in the hardened area
The hardness of the hardened area does not meet the requirements;
The hardness difference of the same piece exceeds the tolerance;
The groove pitch exceeds the tolerance
The width does not meet the requirements;
The length does not meet the requirements;
Other surface roughness does not meet the requirements;
Marking and packaging do not meet the requirements;
Appearance does not meet the requirements
The specified values ​​of the acceptable quality level (AQL) are shown in Table 3. Table 3
Defect group
6.2.1.8 Determine the inspection results according to GB/T2828. 6.2.2 Type inspection
Class B Group 1
Class B Group 2
6.2.2.1 Type inspection Randomly select one blade from the products that have passed the factory inspection and inspect 4.3 to 4.5. 6.2.2.2 If the type inspection is judged to be unqualified, the product should be stopped from acceptance, and the reasons should be analyzed and measures should be taken until the new type inspection is passed.
7 Marking, packaging, transportation and storage
7.1 Each blade should be clearly printed with the manufacturer's name (or trademark) and manufacturing date in an appropriate position. 7.2 After each blade is cleaned and dried, it should be coated with anti-rust grease, wrapped with anti-rust 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 should be included in the packing box: a.
Packing list;
Product certificate;
Product instruction manual.
The following contents should be clearly marked on the outside of the packing box: a.
Receiving unit and address;
Product name and specifications;
Product gross weight and quantity;
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Manufacturer name and address;
Date of publication.
QB/T1564—1992
7.5 The product should be stored in a well-ventilated place, strictly prevent moisture, and cannot be stored with corrosive items. Additional remarks:
This standard is 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 is drafted by Shanghai Machinery Blade Factory and Dalian Machinery Blade Factory. The main drafters of this standard are Du Jinchang, Min Hong, and Ni Xinxing. From the date of implementation of this standard, the original Ministry of Light Industry Standard QB664-1976 "Reed Cutting Knife" will be invalid. Standard search network wwm.bzs050.2om China standard industry information science and technology fee download 137
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