This standard specifies the noise limits for sound power levels and sound pressure levels of thread rolling machines, spring coiling machines, and nail making machines. This standard applies to thread rolling machines, spring coiling machines and nail making machines. JB 9972-1999 Noise limits for thread rolling machines, spring coiling machines and nail making machines JB9972-1999 Standard download and decompression password: www.bzxz.net

ICS25.120.01
J62
JB
Machine Industry Standard of the People's Republic of China
JB9972-1999
Thread rolling machine, spring coiling machine, nail making machine
Noise limits
Released on 1999-05-14
National Machinery Industry Bureau
Released
Implemented on 2000-01-01
JB9972-1999
Foreword
This standard is a revision of ZBJ62006.6-87 "Noise Limits for Forging Machinery Thread Rolling Machines, Spring Coiling Machines, and Nail Making Machines". The technical content of this standard is basically consistent with ZBJ62006.6-87, and has only been re-edited in accordance with relevant regulations. This standard will be implemented from January 1, 2000. This standard replaces ZBJ62006.6-87 from the date of implementation. Appendix A of this standard is an appendix to the standard.
This standard is proposed and centralized by the National Forging Machinery Standardization Technical Committee. The unit responsible for drafting this standard: Huangshi Forging Machine Tool Guang. The main drafter of this standard: Zhou Keding.
This standard was first released in April 1987.
Scope
Machinery Industry Standards of the People's Republic of China
Thread rolling machines, spring coiling machines, nail making machines
Noise limits
This standard stipulates Noise limits for sound power levels and sound pressure levels of thread rolling machines, rolling machines and nail making machines. This standard applies to thread rolling machines, coiling machines and nail making machines. 2 Reference standards
JB99721999
replaces ZBJ62006.687
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. JB/T3623--1984 Forging Machinery Noise Measurement Method Noise Limits
3. 1
Noise A-weighted sound power level during continuous idling operation of thread rolling machines, spring coiling machines, and nail making machines Lw should not be greater than the requirements in Table 1. Table 1
Machine name
Thread rolling machine
Spring coiling machine
Nail making machine
Main parameter name and specifications
Rolling force
kN
Wire diameter
mm
Wire diameter
mm
≤63
>63~200|| tt||>200500
4
4
>4
All specifications
Sound power level Le
dB(A)| |tt||97
98
100
91
95
100
105
Thread rolling machine, The noise A-weighted sound pressure level L at the specified position when the yellow rolling machine and nail making machine are running continuously without load should not be greater than the requirements in Table 2. 3.2
National Machinery Industry Bureau approved 2000-01-01 implementation on 1999-05-14
machine name
thread rolling machine
roller machine
Nail making machine
Measurement method
JB 99721999
Table 2
Main parameter names and specifications
Rolling force
kN||tt ||Wire diameter
mm
Wire diameter
mmbzxZ.net
The measurement method of this standard should be in accordance with the provisions of JB/T3623. 5 Instructions for use
The instructions for use of this standard are shown in Appendix A (Appendix of the standard) ≤63
>63~200
>200~500
4||tt ||4
>4
All specifications
Vocal level Lp
dB(A)
83
84||tt| |85
76
80
85
90
JB99721999
Appendix A
(standard appendix)| |tt||Instructions for use of this standard
A1 All newly designed or improved design trial prototypes, small batch trial production of new products, or the first batch of thread rolling machines and spring coiling machines produced after changes in processes and materials , nail making machine products, as well as thread rolling machines, spring coiling machines, and nail making machine products for quality grade assessment and performance testing, the noise sound pressure level should be measured, and it is recommended to measure the noise sound power level. A2 For thread rolling machines, spring coiling machines, and nail making machine products that are normally mass-produced, only the noise sound pressure level can be measured during factory inspection.
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