JB/T 2449—2001 This standard is a revision of JB/T 2449—1979 "Types and Basic Parameters of Large Three-roll Plate Rolling Machines". The main technical content changes are as follows: - Added the schematic diagram of the whole machine, model and mark, technical school requirements, test methods, etc.; - Supplemented the specifications of the upward adjustment three-roll plate rolling machine. This standard specifies the types and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of large symmetrical three-roll plate rolling machines. This standard is applicable to large symmetrical three-roll plate rolling machines for cold-rolled cylindrical and conical cylinders. Asymmetrical three-roll plate rolling machines such as horizontal downward adjustment type and upper roller universal three-roll plate rolling machines can be implemented as a reference. This standard was first issued in January 1979, and this is the first revision. JB/T 2449-2001 Large Symmetrical Three-roll Plate Rolling Machine JB/T2449-2001 Standard download decompression password: www.bzxz.net

ICS25.120.10
Machinery Industry Standard of the People's Republic of China
JB/T2449-2001
Large-size symmetrical three-roll bending machine
Large-size s ymmetric three-roll bending machinePublished on August 23, 2001
China Machinery Industry Federation
Implementation on December 1, 2001
JB/T2449—2001
This standard is a revision of JB/T24491979 "Types and basic parameters of large three-roll bending machines". Compared with JB/T2449-1979, the main technical content changes of this standard are as follows: the whole machine schematic diagram is added; :
- Added model and mark, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage- Supplemented the specifications of the upward adjustment three-roll plate rolling machine This standard replaces JB/T2449-1979 from the date of implementation. Appendix A and Appendix B of this standard are both prompt appendices. This standard is proposed and managed by the Mechanical Industry Metallurgical Equipment Standardization Technical Committee. The drafting units of this standard: Shenyang Heavy Machinery Group Co., Ltd. and First Heavy Machinery Group Co., Ltd. The main drafters of this standard: Sui Dongzhi and Xu Wenkui. This standard was first issued in January 1979, and this is the first revision. 1 Scope
Machinery Industry Standard of the People's Republic of China
Large-size symmetrical three-roll plate rolling machine
Large-size symmetrical three-roll plate rolling machine JB/T2449—2001
Replaces JB/T24491979
This standard specifies the type and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of large-size symmetrical three-roll plate rolling machines.
This standard applies to large-size symmetrical three-roll plate rolling machines (hereinafter referred to as plate rolling machines) for cold-rolled cylindrical and conical cylinders. Asymmetrical three-roll plate rolling machines such as horizontal downward adjustment type and upper roller universal three-roll plate rolling machines can refer to this standard for implementation. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest version of the following standards. GB/T711—1988
GB/T 1184—1996
GB/T 1801—1999
GB/T307—1999
GB/T 3766—1983
GB/T3768-1996
GB/T 40641983
GB/T 6402—1991
GB/T 10089—1988
GB/T100951988
GB/T 11352-—1989
GB/T 13306—1991
GB 171201997www.bzxz.net
JB/T5000.31998
JB/T5000.61998
JB/T5000.81998
JB/T5000.91998
JB/T5000.10—1998
JB/T5 000.12-1998
JB/T5000.13—1998
JB/T6396—1992||tt| |High-quality carbon structural steel hot-rolled thick steel plates and wide steel strips shape and position tolerances without tolerance values
Limits and fits Selection of tolerance zones and fits Alloy structural steel
General technical requirements for hydraulic systems
Acoustic sound pressure method for determining the sound power level of noise sources Simple method of using envelope measurement surface above the reflecting surface Guidelines for safe design of electrical equipment
Ultrasonic inspection method for steel forgings
Precision of cylindrical worms and worm wheels
Precision of involute cylindrical gears
Casting carbon steel parts for general engineering
Safety technical conditions
Forging machinery
General technical conditions for heavy machineryWelding parts
General technical conditions for heavy machinery
Steel castings
General technical conditions for heavy machineryForgings
General technical conditions for heavy machinery
Cutting parts
General technical conditions for heavy machineryAssembly
General technical conditions for heavy machinery
General technical conditions for heavy machinery
Large alloy structural steel forgings||t t||Approved by China Machinery Industry Federation on August 23, 2001, implemented on December 1, 2001
3 Type and basic parameters
3.1 Type
3.1.1 See Figure 1 for upward adjustment three-roll plate rolling machine.2
JB/T2449—2001
3.1.2 See Figure 2 for downward adjustment three-roll plate rolling machine.3.2 Basic parameters
JB/T2449—2001
3.2.1 The main parameters of the plate rolling machine shall comply with the provisions of Table 1. Figure
Plate rolling machine specifications
JB/T2449-2001
Main parameters of plate rolling machine
The basic parameters of the upward adjustment plate rolling machine shall comply with the provisions of Table 2. Table 2
Basic parameters of upward adjustment three-roll plate rolling machine
3WBJ-S10
X 6000
3WBI-S16
X 6000
3WBI-S18
3WBJ-S25
X 4000
3WBI-S30
3WBJ-S40
3WBJ-S50
3WBI-S70
mm/min
Note: The maximum thickness of the plate is designed based on the service limit of the plate as 245MPa. When the service limit of the rolled plate is greater than this value, the maximum allowable thickness of the plate rolling machine shall be converted according to Appendix A (suggested Appendix) 4
JB/T 2449-2001
The basic parameters of the downward adjustment mechanical transmission plate rolling machine shall comply with the provisions of Table 3. Table 3
Basic parameters of three-roll plate rolling machine
Downward adjustment mechanical transmission
3WBJ-X50
3WBJ-X40
3WB-X60
3WB-X50
3WBJ-X80
3WBJ-X70
X 4000
3WB-X60
3，45
Note: The maximum thickness of the plate rolling is designed based on the service limit of the plate as 245MPa. When the service limit of the rolled plate is greater than this value, the maximum allowable thickness of the plate rolling machine must be converted according to Appendix A
The basic parameters of the downward hydraulic transmission plate rolling machine shall comply with the provisions of Table 4. Table 4
3WBY-X95
3WBY-X85
3WBY-X75
Basic parameters of downward adjustment hydraulic transmission three-roller plate rolling machine
3.5, 5.6
mmimin
Note: The maximum thickness of the plate is designed based on the yield limit of the plate as 245MPa. When the yield limit of the rolled plate is greater than this value, the maximum allowable thickness of the plate rolling machine must be converted according to Appendix A
3.3 Model and marking example
3.3.1 Model
3.3.2 Marking example
JB/T2449-2001
Plate thickness × plate width, mm
S-upward adjustment , X down adjustment type
J-mechanical type, Y-hydraulic type
Example 1: Maximum rolling thickness is 30mm, maximum rolling width is 3200mm. Upward adjustment type mechanical transmission three-roller plate rolling machine is marked as 3WBJ-S30×320030X3200 three-roller plate rolling machine JB/T24492001Example 2: Maximum rolling thickness is 75mm, maximum rolling width is 6000mm. Downward adjustment type hydraulic transmission three-roller plate rolling machine is marked as: 3WBY-X75×600075X6000 three-roller plate rolling machine JB/T244920014 Technical requirements
General requirements
4.1.1 Plate rolling machines shall comply with the requirements of this standard and be manufactured according to drawings and technical documents approved by the prescribed procedures. Welded parts shall comply with the relevant provisions of JB/T5000.3. 4.1.2
Steel castings shall comply with the relevant provisions of JB/T5000.6. 4.1.4
Forgings shall comply with JB/T5000.8. Cutting parts shall comply with the relevant provisions of JB/T5000.9. Assembly shall comply with the relevant provisions of JB/T5000.10. Safety requirements shall comply with the provisions of GB17120. The quality of electrical equipment shall comply with the provisions of GB/T4064. The hydraulic system shall comply with the provisions of GB/T3766. Hydraulic transmission components are not allowed to produce creeping, vibration, stagnation and significant impact within the working range. There shall be no leakage in the hydraulic and lubrication systems. The hydraulic and lubrication systems should work reliably to ensure full lubrication of all operating parts. There should be no abnormal impact sound when the gear transmission system, electrical system and hydraulic system are working. 4.2 Performance requirements of the whole machine
JB/T2449—2001
4.2.1 The effective length of the roller of the three-series plate rolling machine shall be greater than 50~200mm of the maximum width of the plate rolled by the plate rolling machine. 4.2.2 Under the specified conditions of use, the time from the start of use of the three-roller plate rolling machine to the first overhaul (referring to the replacement of roller bearings and lifting worm gears, etc.) should not be less than 7000 hours.
4.2.3 The service life of each plate rolling machine roller should not be less than 25000 hours. 4.2.4 The noise of the plate rolling machine shall not exceed 85dB (A). 4.2.5 The two lower rollers of the same plate rolling machine should be interchangeable. 4.3 Requirements for main components
4.3.1 Frame
4.3.1.1 Material requirements for the frame
a) Cast steel frame, its material should comply with the provisions of GB/T11352 with mechanical properties not lower than ZG270-500 material b) Welded frame, its material should be hot-rolled thick steel plate and comply with the provisions of GB/T711. 4.3.1.2 Frame processing requirements
a) The frame processing of the upward adjustment three-roll plate rolling machine shall not be lower than the requirements shown in Figure 3. JB/T2449-2001
b) The front frame processing of the downward adjustment three-roll plate rolling machine shall not be lower than the requirements shown in Figure 4. JB/T2449-2001
c) The rear frame processing of the downward adjustment three-roll plate rolling machine shall not be lower than the requirements shown in Figure 5. L,(H9)
Taspry
4.3.2 Rollers
4.3.2.1 Material requirements for rollers
4,(59)
The material of the roller is alloy structural steel (GB/T3077), and its mechanical properties shall not be lower than the requirements of Table 5. Table 5 Mechanical properties of roller materials
4.3.2.2 Processing requirements for rollers
a) The dimensional tolerance grade of the neck should not be lower than f9 specified in GB/T1801, the cylindricity should not be greater than grade 9 specified in Table B2 of GB/T1184-1996, and the surface roughness should be R1.6um; b) The cylindricity tolerance grade of the roller body should not be lower than grade 9 specified in Table B2 of GB/T1184-1996; c) The coaxiality tolerance grade of the roller body diameter to the two roller diameters should not be less than Lower than the requirements of Grade 8 in Table B4 of GB/T11841996; d) The rollers shall be quenched and tempered, and the surface of the working parts shall be surface hardened to a hardness of 40-45HRC, with a hard layer depth of 3~4mm; e) No defects are allowed within the fillet and within 50mm from the fillet, and no repairs are allowed; the roller body and roller diameter shall be ultrasonically inspected and comply with the relevant provisions of GB/T6402. There shall be no cracks with an equivalent diameter exceeding Φ6mm inside, and no other defects such as white spots. 9
4.3.3 Plate rolling machine base
JB/T2449-2001
The flatness tolerance of the plate rolling machine base and the frame joint surface shall not be less than the 8th grade specified in Table B1 of GB/T1184-199%; the verticality tolerance of the middle crossbeam and the frame joint surface to the upper bottom surface shall not be greater than the 9th grade specified in Table B3 of GB/T1184-1996. 4.4 Assembly and installation requirements
4.4.1 The horizontality tolerance value of the plane on the base during assembly and installation shall not be greater than 0.1/1000mm. 4.4.2 The horizontality tolerance value of the upper roller axis shall not be greater than 0.2/1000mm: The horizontality tolerance value of the lower roller axis in the longitudinal and transverse directions shall not be greater than 0.2/1000mm (see Figure 6).
4.4.3 Parallelism tolerance of the upper roller axis to the two lower roller axes (average value of A and B) (see Figure 7): When the upper roller diameter D≥400~500mm, its parallelism tolerance ≤1.3mm; when the upper roller diameter D>500mm, its parallelism tolerance ≤1.6mm100 ±33mm; when the upper roller diameter D>500mm, its parallelism tolerance ≤1.6mm100 ±33mm; when the upper roller diameter D>500mm, its parallelism tolerance ≤1.6mm100 ±3
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