JB 9971-1999 This standard is a revision of ZB J62 006.5-87 "Noise limits for forging machinery - Noise limits for pipe bending machines and small and medium-sized three-roll plate rolling machines". This standard specifies the noise limits for sound power level and sound pressure level of pipe bending machines and three-roll plate rolling machines. This standard is applicable to pipe bending machines and three-roll plate rolling machines. This standard was first issued in April 1987. JB 9971-1999 Noise limits for pipe bending machines and three-roll plate rolling machines JB9971-1999 standard download decompression password: www.bzxz.net

ICS 25.120.01
Machinery Industry Standard of the People's Republic of China
JB9971—1999
Pipe Bender, Three-roll Plate Rolling Machine
Published on 1999-05-14
National Bureau of Machinery Industry
Noise Limits
2000-01-01Implementation
JB9971-1999
This standard is a revision of 2BJ62006.5-87 "Noise Limits for Forging Machinery Pipe Benders, Small and Medium-sized Strip Plate Machines". The technical content of this standard is basically the same as that of 2BJ62006.587, and it has only been newly edited according to relevant regulations, and the name of the standard has been changed to "Noise Limits for Pipe Benders and Three-roll Plate Rolling Machines". This standard will be implemented from January 1, 2000. This standard shall be replaced by ZBJ62006.5-B7 from the date of implementation. Appendix A of this standard is the appendix of the standard.
This standard is proposed and managed by the National Standardization Technical Committee of Machinery. The responsible unit of the standard is Changzhi Silver Press Machine Tool Factory. The standard was first issued in April 1987.
Machinery Industry Standard of the People's Republic of China
Bending machine, three-roller plate rolling machine, [
Noise limit
The standard specifies the noise limit of sound power level and output pressure level of bending machine and three-roller plate rolling machine. This standard is used for bending machine and three-roller plate rolling machine. 2 Referenced standards
FB9971-1999
ZB 362 006.587
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 explore the possibility of using the latest version of the following standards. JB/T3623-1984 Noise measurement method for pressure machinery 3 Noise limit values ​​for pipe bending machines 3.1 The noise level of the pipe bending machine during continuous idling operation shall not exceed the provisions of Table 1. Table 14-159 The noise level of the pipe bending machine during continuous idling operation at the specified position shall not exceed the provisions of Table 2. 3.2 The noise level of the pipe bending machine during continuous idling operation shall not exceed the provisions of Table 2. 114-15 The noise level of the pipe bending machine during continuous idling operation shall not exceed the provisions of Table 2. Not greater than the provisions of Table 3, 4.1
Mongolian Machinery Industry 1959-05-14 approved 2000-01-01 implementation
Rollable thickness × rollable plate width
Production power level
1z x 24X0
g×2500
3B9971-1999
162nKh
12 × 2500
8×3200
20 × 20X)
16×2500
12×3200
25 × 2kAttached)
20 ×2500
16 × 3200
252500
20×3200
16×4000bzxz.net
The noise A weighted power level of the asymmetric double saw plate rolling machine during continuous idling operation shall not be greater than the provisions of Table 4. Table 4
Extreme thickness × Plate thickness
Strict power level
2×1600
12×2000
5 × 250
4.3 The sound pressure level at the sound release point of the specified position diagram when the three-way plate rolling machine is connected and idling shall not be greater than the provisions of Table 5. Table 5
2×1600
Extreme thickness Plate thickness
Sound pressure level
5×2003
12 × 2000
R×2500
16 ×2000
12×2560
8×320)
20 ×2000
16 t | ×4000
4.4 The noise limit values ​​of other specifications of three-roll plate rolling machines not listed in the table shall comply with the noise limit value requirements of the larger size of the similar specifications in the table.
Measurement method
The measurement method of this standard shall be in accordance with the provisions of B3623. 6 Instructions for use
The usage of this standard is shown in Appendix A (Appendix to the standard. JB 9971-1999
(Appendix to the standard)
Instructions for use of this standard
A All trial prototypes of new and improved designs, small batch trial products, or the first batch of tube bending machines and three-roll plate rolling machine products produced with process and material changes, as well as tube bending machines and three-roll plate rolling machine products that undergo quality grade assessment and performance tests, shall be tested for noise pressure levels. It is recommended to test the power level: 2 For normal batch production of tube bending machines and three-roll plate rolling machine products, only the noise positive level can be measured during the inspection.
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