GB/T 28245-2012 in English
SUPERSEDEDNoise limits for automatic metalforming machinery
- Issued on:2012-03-09
- Implemented on:2013-01-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
本标准规定了自动锻压机的声功率级和声压级的噪声值。
本标准适用于各种类型的自动锻压机。
Introduction
National Standard of the People's Republic of China GB 28245—2012
Interpretation of Noise Limits for Automatic Forging Machines
Standard Background: This standard specifies the noise limits for sound power level and sound pressure level of automatic forging machines. It is applicable to various types of automatic forging machines, including thread rolling machines, spring winding machines, nail making machines, automatic upsetting machines, automatic edge trimming machines, automatic thread rolling machines and automatic bending machines.
Comparison of standard frameworks
| Equipment type | Measurement parameter | Limit unit | Scope of application |
|---|---|---|---|
| Thread rolling machine | Sound power level (LwA), sound pressure level (LpA) | DBA | Maximum pressure ≤63kN, 63kN～200kN, 200kN～5000kN |
| Spring coiling machine | Sound power level (LwA), sound pressure level (LpA) | DBA | Wire diameter ≤4mm, 4mm～8mm, ＞8mm |
| Nail Making Machine | Sound Power Level (LwA), Sound Pressure Level (LpA) | DBA | Maximum diameter ≤8mm, >8mm |
Explanation of professional terms and practical application cases
Sound Power Level (LwA):Indicates the radiated noise of the equipment under no-load condition, in decibels (DBA). For example, the sound power level limit of the thread rolling machine during continuous no-load operation is 97, 98 and 100 DBA respectively according to the pressure level.
Sound Pressure Level (LpA):Indicates the noise intensity of the equipment at the specified measurement position, in decibels (DBA). For example, the sound pressure level limit of the nail making machine is 90 DBA.
Standard formulation background and technology evolution analysis
This standard was issued in 2012 and became a recommended standard (GB/T 28245-2012) in 2017. Its formulation background is mainly based on the demand for noise control of industrial equipment, especially in the field of forging machinery. With the advancement of technology, the measurement method has gradually developed from traditional empirical judgment to standardization and precision.
Implementation suggestions
- Enterprises:When purchasing or renovating automatic forging machines, they should focus on the noise indicators of the equipment and give priority to products that meet the standards.
- Testing agencies:Strictly measure in accordance with GB/T 23281 and GB/T 23282 standards, and make rectification suggestions for equipment that exceeds the standards.
- Regulatory authorities:Strengthen supervision and law enforcement to ensure that enterprises implement noise control measures and reduce the occurrence of occupational diseases.
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