GB 24389-2009Noise limits for shearing machinery (English PDF)
剪切机械 噪声限值
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Issued by
Standardization Administration of China
Level / Type
National · Mandatory
Issue date
September 30, 2009
Implementation date
July 1, 2010
Scope
GB 24389-2009 is the English-translated version of 剪切机械 噪声限值.
GB 24389-2009 — This standard specifies the shear mechanical sound power level and sound pressure level of the noise limits. This standard applies to mechanical shear, including various types of bar shears, alligator shears,, punching shears, United punching Shears.
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Document preview — GB 24389-2009
National Standard of the People's Republic of China
- ICS
- 25.120.10
- Classification
- J 62
Issued by: Standardization Administration of China
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Noise limits
- 3.1 Bar shears noise limits
- 3.4 Punching shear noise limits
- 3.5 Ironworkers noise limits
- 4 Measurement
- 4.1 SPL Measurement
- 4.2 Sound power level measurement
- 4.3 Noise Measurement Description
Foreword
3.1.1,3.2.1,3.3.1,3.4.1,3.5.1 this standard, as recommended in Chapter 4, the other mandatory.
The standard proposed by China Machinery Industry Federation.
This standard by the National Forging Machinery Standardization Technical Committee.
1 Scope
This standard specifies the shear mechanical sound power level and sound pressure level of the noise limits.
This standard applies to mechanical shear, including various types of bar shears, alligator shears,, punching shears, United punching Shears.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 23281-2009 forging machinery noise level measurement method GB/T 23282-2009 forging machinery sound power level measurement
3 Noise limits
Shear mechanical noise into sound power level, sound pressure level requirements, and according to the type of cutting machine are given noise limits.
3.1 Bar shears noise limits
3.1.1 Bar shears sound power level limits
Bar shears during continuous idling noise A-weighted sound power level LWA shall not exceed specified in Table 1.
Table 1
Nominal force bar shearing machine/kN limit sound power level LWA/dB (A) 10 ~ 20103 > 20114
Table 3
Shears Hydraulic pump flow rate/(L/min) sound power level limit value LWA/dB (A) <=25 94 > 25 to 63100 > 63103
3.3.2 Shears SPL Limit
Table 4
<=10 85
> 10 ~ 2090
> 2093
Table 5
<=25 81
> 25 to 6385
> 6390
Specified in Table 6.
Table 6
<=10 101
> 10 ~ 20102
> 20103
3.4 Punching shear noise limits
3.4.1 Punching shear sound power level limits
Noise A-weighted sound power level LWA punching shear continuous idling time should not exceed 94dB (A).
3.4.2 Punching shear SPL Limit
3.5 Ironworkers noise limits
3.5.1 Ironworkers sound power level limits
During continuous idling noise A-weighted sound power level LWA shall not exceed the specified in Table 7.
Table 7
Ironworker can shear thickness/mm sound power level limit value LWA/dB (A) <=10 97 > 10 ~ 16100 > 16106
3.5.2 Ironworkers SPL Limit
Table 8
<=10 83
> 10 ~ 1686
> 1688
4 Measurement
4.1 SPL Measurement
Noise level measurement method presses shall comply GB/T 23281-2009 of.
4.2 Sound power level measurement
Sound power level measurement of the press shall comply with GB/T 23282-2009 of.
4.3 Noise Measurement Description
4.3.1 factory test only measures the noise level.
4.3.2 The new design or improve the design, technology, materials, new products after the noise level should be measured during the performance test; can then measure the noise Sound power level to the noise level of conformity assessment basis.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 5 pages — is available in the English PDF.
Referenced standards
Normative references
GB/T 23282-2009
Cited by
- JB/T 12765-2015Horizontal plate shear
- JB/T 11812.2-2014Movable Plate Shears - Part 2: Specifications
- JB/T 12103-2014Shears - Evaluation Method for Reliability
- JB/T 1296.2-2014Ironworkers - Part 2: Technical requirements
- GB 28240-2012Shears - Safety requirements
- GB 8176-2012Safety production codes for presswork
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