QB/T 1447.2-2000 Single-face corrugated board machine pressing roller
Some standard content:
QB/T1447.2—2000
This standard is based on the experience gained since the implementation of QB/T1447.2-1992 "Pressing Roller for Single-faced Corrugated Board Machines", and based on the current situation of corrugated roller manufacturing in my country, and with reference to the recent relevant international standards for similar products, the original standard QB/T1447.2-1992 has been modified accordingly. The main modifications are as follows: Modifications have been made to the arrangement of the standard.
1. S=7~9.5mm in Figure 1 was changed to S=8mm~~10 mm. R=6~10 mm was changed to R=4 mm~6 mm. 2. The original 4.3.2.3 heat treatment after welding was changed to 4.3.2.4 stress treatment after welding. And the use of knocking method or heat treatment method to eliminate the welding stress of the weld was added. If heat treatment is used, the temperature is not allowed to exceed 400℃. 3. Added Appendix A to Appendix G.
This standard shall replace QB/T1447.2--1992 from the date of implementation. Appendix A, Appendix B, Appendix C, Appendix D, Appendix E and Appendix F of this standard are all appendices of the standard. Appendix G of this standard is a prompt appendix.
This standard is proposed by the Industry Management Department of the State Bureau of Light Industry. This standard is under the jurisdiction of the National Technical Committee for Standardization of Light Industry Machinery. This standard was drafted and revised by the Packaging Machinery Research Institute of China Aerospace Science and Technology Corporation and Capital Aerospace Machinery Corporation. The main drafters of this standard are Lu Ruikun, Yan Xiaolin and Xiao Huifang. 119
1 Scope
Light Industry Standard of the People's Republic of China
Single-faced corrugated board machine
Pressure roller
QB/T 1447.2--2000
Replaces QB/T1447.2--1992
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage and other requirements of the pressure roller of the single-faced corrugated board machine (hereinafter referred to as the pressure roller). This standard is applicable to the pressure roller of the single-faced corrugated board machine with steam heating working pressure of 0.1MPa~~1.5MPa and maximum working temperature not exceeding 200℃. The pressure roller heated by electricity and gas can also be implemented by reference. 2 Referenced 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 all valid. All standards are subject to revision and parties using this standard should investigate the possibility of using the most recent versions of the following standards. GB150-1998 Steel pressure vessels
GB191—1990 Pictorial symbols for packaging, storage and transportation
High-quality carbon structural steel
GB/T 699—1999
GB/T 1184-1996
Shape and position tolerances without tolerance values
GB/T 1801—1999
GB/T 1958—1996
Limit and fit tolerance zones and fits Selection of shape and position tolerances Testing regulations
GB/T 5617—1985
GB/T 8162--1987
Determination of effective hardened layer depth after induction or flame quenching of steel Seamless steel pipes for structural steel
GB/T 13306—1991
JB2536—1980Painting, packaging and transportation of pressure vesselsJB4726—1994Carbon steel and low alloy steel forgings for pressure vesselsJB4730—1994
Nondestructive testing of pressure vessels
Regulations on safety technical supervision of pressure vessels (99 edition)3 Product classification
3.1 Structure
The pressing roller consists of a cylinder and two shaft heads. The cylinder and the shaft heads are interference fit. The shaft heads are assembled at both ends of the cylinder and the joints are connected by airtight welds.
3.2 Category
The pressing roller is divided into three categories according to the heating method:
The first category is steam-heated pressing roller (belonging to the first category of pressure vessels); the second category is electrically heated pressing roller;
The third category is gas (liquefied petroleum gas) heated pressing roller. 3.3 Specifications
Pressing roller body:
a) Maximum working outer diameter Dmx is not more than 450mm; approved by the State Bureau of Light Industry on October 31, 2000
Implementation on April 1, 2001
QB/T1447.2--2000
b) Maximum working length Imax is not more than 3000mm; c) Wall thickness? is in the range of 25mm~~65mm.
4 Technical requirements
4. 1 Working performance
4.1.1 The pressing roller rotates when working, and its linear speed is not more than 250m/min. The surface working temperature range is 160℃200℃, and the steam heating working pressure is 0.1MPa1.5MPa. 4.1.2 The steam-heated pressing roller, according to the working pressure and volume, belongs to the first category of pressure vessels (low-pressure rotary pressure vessels) in accordance with the provisions of the "Regulations on Safety Technical Supervision of Pressure Vessels" (99 Edition). 4.2 Material Selection
4.2.1 Cylinder Material
The material of the cylinder is seamless steel pipe, steel ingot or steel forging. The carbon content of the material is within the range of 0.25% to 0.50%. When seamless steel pipes are used, their technical conditions shall be in accordance with the provisions of GB/T8162, and their chemical composition shall be in accordance with the provisions of GB/T699. High-quality carbon structural steel ingots or steel forgings are used, and their technical conditions are in accordance with the provisions of JB4726, and the forging level is I level. 4.2.2 Shaft Head Material
When the shaft head material is made of high-quality carbon structural steel forgings, the carbon content of the material is 0.25% to 0.50%, and its technical conditions are in accordance with the provisions of JB4726, and the forging level is 1 level.
4.2.3 The cylinder and the shaft head shall be made of the same material as far as possible. If different materials are used, the smaller strength value shall be used for calculation. 4.2.4 When the cylinder and the shaft head are made of foreign materials, they shall be used in correspondence with domestic materials. The scope of use shall comply with the relevant specifications and standards of the material production country and have the quality certificate of the material. Before the first use, the manufacturing unit shall conduct welding performance tests on the material and re-test the chemical composition and mechanical properties. Only after passing the test can the material be put into manufacturing. 4.3 Assembly requirements
4.3.1 Assembly of cylinder and shaft head
4.3.1.1 The combination of the cylinder and the shaft head adopts interference fit. According to GB/T 1801, the limit interference shall not be less than the meeting, and the surface roughness R value shall not be greater than 1.6μm, and then an airtight weld shall be used for connection. H1, surface of the mating surface
4.3.1.2 If the connection between the cylinder and the shaft head of the steam heating compression set does not adopt the interference fit size and structure specified in this standard, it shall be implemented in accordance with the "Regulations on Safety Technical Supervision of Pressure Vessels" (99 Edition) and GB150. 4.3.2 Welding
4.3.2.1 Form and size of welding
The connection between the cylinder and the shaft head adopts a "U"-shaped weld (see Figure 1). 1-Interference fit length (L≥100 mm) S-weld penetration depth (S=8mm10mm); α-groove angle (α=55°～60°); R-*U"-shaped groove arc radius (R=4mm～6 mm); D The matching diameter of the cylinder and the shaft head
4.3.2.2 Properties of the weld
QB/T 1447. 2--2000
The weld connecting the cylinder and the shaft head is only used for airtightness and is not a stress-bearing weld. 4.3.2.3 Welding process
4.3.2.3.1 The welding rod shall be a low-hydrogen alkaline carbon steel welding rod. 4.3.2.3.2 When welding steel parts with a carbon content greater than 0.25%, the welding part of the workpiece shall be preheated to 300C before welding and kept cool after welding.
4.3.2.3.3 A welding performance test shall be carried out before production. No cracks or vents are allowed on the weld surface. The crack rate of the weld section shall be less than 10% to be qualified. Tensile and bending strength tests are not required. The evaluation report of the welding performance test shall be carried out in accordance with Appendix F, and the butt weld specimen shall be carried out in accordance with Appendix G.
4.3.2.3.4 Welding process specifications The procedure should be formulated in accordance with the technical requirements of the drawings and the qualified welding procedure specifications. 4.3.2.3.5 The welding performance test evaluation report, welding procedure specifications and welding records shall be kept for no less than 7 years. 4.3.2.4 Stress treatment after welding
The cylinder and the shaft head shall be subjected to welding stress relief treatment after welding. Use the knocking method or heat treatment method to eliminate the welding stress of the weld. If heat treatment is used, the temperature is not allowed to exceed 400℃. 4.3.2.5 Weld repair
When the weld has excessive defects such as cracks, pores, arc pits and slag inclusions visible to the naked eye, and needs to be repaired by welding, the weld shall be repaired in accordance with Article 71 of the "Regulations on Safety Technical Supervision of Pressure Vessels" (99 Edition) or in accordance with 10.3.4 of GB150-1998. 4.4 Nondestructive testing inspection
After the surface of the weld connecting the cylinder and the shaft head is machined, the total length of the weld should be tested by magnetic particle testing or penetrant testing. Magnetic particle testing: The surface roughness R. value of the inspected workpiece is not greater than 12.5μm. Penetrant testing: The surface roughness R. value of the inspected workpiece is not greater than 6.3μm. For magnetic particle testing and penetrant testing, refer to JB4730, and the cumulative length grade of defects displayed meets the I level for qualified. 4.5 Compacting manufacturing precision requirementsbzxz.net
4.5.1 When the linear speed V is not greater than 120m/min a) The radial circular runout tolerance of the roller surface to the common axis of the two shaft necks shall not be less than the accuracy of Grade 8 according to the provisions of GB/T1184. b) The surface roughness R. value of the roller shall not be greater than 1.6um. 4.5.2 When the line speed V is greater than 120m/min a) The radial runout tolerance of the roller surface to the common axis of the two journals shall not be less than the accuracy of Grade 7 according to the provisions of GB/T1184. b) The surface roughness R value of the roller shall not be greater than 0.8um 4.6 Determination of the middle height
4.6.1 Definition of the middle height (f)
The middle height refers to the difference between the diameter of the middle part and the diameter of the two ends of the cylindrical generatrix in the shape of a waist drum. 4.6.2 Value of the middle height
When the line speed V is greater than 120m/min, the clamping roller adopts the middle height, and its value is twice the calculated deflection of the highest working load. 4.6.3 Limit deviation of the middle height
The limit deviation of the middle height shall be ±f10% at each 100mm bisector along the axial direction. 4.7 Surface hardening treatment
a) For the pressing roller with V not more than 120m/min, the hardness of the tempering shall be HRC30~35b) For the pressing roller with V greater than 120m/min, the surface hardness of the pressing roller shall be HRC40~50, and the depth of the hardness layer shall be not less than 2mm. 4.8 Test requirements
After the pressing roller is manufactured, a static balance test and a hydraulic test shall be carried out. The static balance test and the hydraulic test shall meet the requirements of the design drawings. 122
5 Test methods
QB/T1447.2-2000
5.1 The circular runout tolerance shall be measured according to the method given in Appendix A of GB/T1958--1996, 4--1. 5.2 Surface hardness test
a) Each roller should be tested for more than 10 hardness values, and the test position is to test one hardness value at each end and the middle of the cylinder surface; b) The depth of the surface hardened layer shall be tested in accordance with the provisions of GB/T5617. 5.3 Static balance test
After the mechanical processing of the pressing roller is completed, a static balance test shall be carried out, and the allowable unbalanced torque value shall be in accordance with the provisions of the design drawing. The static balance test shall be carried out on a special static balance test bench with a knife edge ruler. 5.4 Hydraulic test
a) Use clean water (normal temperature) as the medium to carry out a hydraulic test. Fill the inner cavity of the corrugated cardboard with water, and the gas trapped in the cavity must be exhausted before slowly increasing the pressure to the design pressure. Confirm that there is no leakage, no deformation, and no displacement of the shaft head to the cylinder, and continue to increase the pressure to the specified test pressure, maintain the pressure for 30 minutes, then reduce it to the design pressure, and maintain the pressure for another 30 minutes. Check that there is no leakage, no visible abnormal deformation, and no abnormal sound during the test.
b) The hydraulic test pressure is equal to 2 times the design pressure. 6 Inspection rules
6.1 After each pressing roller is manufactured, it shall be subjected to precision inspection and shall comply with the provisions of 4.5. 6.2 After each pressing roller is manufactured, it shall be subjected to surface hardness inspection and shall comply with the provisions of 4.7. 6.3 After mechanical processing, the medium-height pressing roller shall be subjected to medium-height inspection and shall comply with the provisions of 4.6.2. 6.4 After each pressing roller is manufactured, it shall be subjected to hydraulic test and shall comply with the provisions of 4.8. 6.5 When the pressing roller leaves the factory, the manufacturer must provide the user with product quality certification documents. Product quality certification documents include the following three parts. 6.5.1 Product certificate, in accordance with Appendix A. 6.5.2 Product completion drawing
Product completion drawing is drawn by the manufacturing unit, and the following contents shall be listed in the completion drawing: a) Product completion drawing, main dimensions of the appearance, minimum allowable wall thickness of the cylinder and the shaft head; b) Actual dimension value of the interference fit structure between the cylinder and the shaft head and the cross-sectional dimension of the weld; c) Technical characteristics table of pressure vessels: capacity category, working medium, maximum working pressure, maximum working temperature, design pressure, design temperature, test pressure, material grade of main pressure-bearing components, weld coefficient, volume, weight; d) If material substitution, non-destructive testing method, processing size change, etc. occur during manufacturing, the manufacturing unit shall directly mark on the completion drawing according to the requirements of the design modification notice. The marked part shall be signed by the modifier and the modification date; e) The work drawing shall be signed and dated by the designer of the design department, and the name of the manufacturing unit and the manufacturing license number shall be marked to be valid. 6.5.3 Quality certificate, according to Appendix B. The product quality certificate shall include the following contents: a) List of materials used for the main pressure-bearing components of pressure vessel products, in accordance with Appendix C. b) Weld surface flaw detection report, in accordance with Appendix D. c) Pressure vessel pressure test report, in accordance with Appendix E. 7 Labels, signs, storage, packaging, and transportation 7.1 Container labels
7.1.1 The container labels shall be fixed in an obvious position of the single machine, and their style and specifications shall comply with the provisions of GB/T13306. 7.1.2 The labels shall include the following contents:
a) Name of the manufacturer and manufacturing license number; 123
b) Number of the container assigned by the manufacturer;
c) Date of manufacture;
d) Design pressure;
e) Maximum allowable working pressure;
f) Design temperature;
g) Test pressure;
h) Container weight;
i) Container category.
7.2 Marking
QB/T 1447.2--2000
7.2.1 Product marking: engrave permanent markings at appropriate positions on the roller head: a) Manufacturer's unified number;
b) Maximum allowable working pressure;
c) External diameter.
7.2.2 Product transportation marking: According to the provisions of GB191 packaging and transportation, the words and graphics of "afraid of moisture" shall be marked in a conspicuous place on the side of the special wooden box for packaging according to GB191\Mark 7\.
7.2.3 Storage
a) Each pressing roller shall have a special storage box. b) After the pressing roller passes the inspection, the outer surface shall be oil-sealed and coated with anti-rust paint (butter, "201" anti-rust grease, non-acidic industrial vaseline), and then stored in a special box. 7.2.4 Packaging and transportation
a) The quality certification documents of the container shall be handed over to the user along with the product packaging box. b) The pressing roller is assembled on a single machine and is packaged and transported with the single machine. c) When the corrugated roller is packaged and transported separately, it shall be packaged and transported in wooden boxes in accordance with the provisions of JB2536. 124
Manufacturing unit
Manufacturing license
Product name
Design unit
Product number
Manufacturing completion date
QB/T1447.2—2000
Appendix A
(Appendix to the standard)
Product certificate
Product certificate
Design approval number
Ordering unit
Manufacturing number
This pressure vessel product has been inspected and meets the requirements of the design drawing technical conditions of the light industry standard QB/T1447.2-2000 of the People's Republic of China "Corrugated rollers for single-faced corrugated board machines". Signature of the chief quality inspector
Special for quality inspection (official seal)
Note: The size can be determined by yourself.
Product name
Product number
Quality inspector (signature and seal)
Quality assurance engineer (signature and seal)
Special for quality inspection (official seal)
Note: The size can be determined by yourself.
QB/T 1447.2—2000
Appendix B
(Appendix to the standard)
Product quality certificate
Pressure vessel
Product quality certificate
QB/T1447.2—2000
In the delivery form
Production"
: Ya Xing
Product name
Product number
Flaw detection method
Magnetic particle detection
Penetrating flaw detection
Flaw detection location
Weld number
Flaw detection conclusion:
QB/T1447.2—2000
Appendix D
(Appendix to the standard)
Weld surface flaw detection report
Magnetization method
Magnetization current
Magnetization time
Evaluation standard
Sea penetrant
Emulsifier
Developer
Evaluation standard
Contact distance
Surface state
Type of magnetic powder
Instrument model
Flaw detection temperature
Surface state
Type of penetrant
Instrument model
Flaw detection results
Defect location
1. This product complies with QB/T1447.2—2000 and is assessed as qualified. Defect length
2. Inspection location and defect location, please refer to the inspection location diagram (attached separately). Reporter (qualification)
Auditor (qualification)
Note: The size can be determined by yourself.
Special seal for flaw detection
Flaw detection ratio
Manufacturing number:
Defect treatment
Product name
Product number
Pressure gauge number
Test medium
Test environment overflow
Design requirements
Pressure test curve
Actual pressure test curve
Conclusion:
This product has been tested by
Inspector
QB/T1447.2-2000
Appendix E
(Standard Appendix (recorded)
Pressure test inspection report
Test type
Test date
Chlorine content in water
Test pressure P
Design pressure P
Test pressure P
Design pressure P
Medium temperature
Pressure holding time
Pressure holding time
Manufacturing number:
(mg/L)
Pressure holding time
Pressure holding time
MPa test, no leakage; no visible abnormal deformation, no abnormal sound, the test conclusion is qualified. Year
Note: The size can be determined by yourself.
Inspection person in charge
Name of unit
Welding method
QB/T1447.2—2000
Appendix F
(Appendix to the standard)
Welding performance test evaluation report
Evaluation report number
Weld joint (use a simple drawing to draw the groove form, size, weld layer and sequence, etc.). Simplified Chinese: Outer diameter
Welding rod brand
Welding rod standard
Welding position:
Butt weld position
Weld appearance inspection:
Weld nondestructive testing:
(mm)Thickness
Direction (upward, downward)
Magnetic particle inspection (standard number, result)
Penetrant inspection (standard number, result)
Evaluation result:
(qualified, unqualified)
(Signature)
(Signature)
! (Signature)
Note: The size can be determined by yourself.
Welding time
Post-weld heat treatment
Insulation time
Current type
Welding current
(A)Voltage
Preheating:
Preheating temperature
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