JB 9969-1999 This standard is a revision of ZB J62 006.3-87 "Noise limits for forging machinery - Noise limits for bar shears, crocodile shears and plate shears". This standard specifies the noise limits for the sound power level and sound pressure level of bar shears, crocodile shears and plate shears. This standard applies to bar shears, crocodile shears and plate shears. This standard was first issued in April 1987. JB 9969-1999 Noise limits for bar shears, crocodile shears and plate shears JB9969-1999 Standard download decompression password: www.bzxz.net

IC:525,120.01
Machinery Industry Standard of the People's Republic of China
JB 9969-1999www.bzxz.net
Noise Limits for Bar Shears, Alligator Shears and Shearing Machines
Published on 1999-05-14
Published by the State Bureau of Machinery Industry
2UHU0-01-01 Implementation
JB9969-1999
This standard is a revision of ZBJ62006.3-87 "Noise Limits for Bar Shears, Alligator Shears and Shearing Machines". This standard is basically consistent with the technical content of ZB152006.387, and has only been re-edited according to relevant regulations. This standard shall be implemented from January 1, 2000. This standard replaces Appendix A of ZBJ62006.3-874 from the date of implementation and is the appendix of the standard.
This standard is issued and managed by the National Technical Committee for Forging and Forging Standardization. The drafting unit of this standard is Ji'nan Casting and Forging Press Research Institute. This standard was first issued in April 1987.
Machinery Industry Standard of the People's Republic of China
Noise Limits for Bar Shears, Alligator Shears and Shearing Machines
JB9969-1999
Replaces ZBJ62006.3-87
This standard specifies the sound power level and noise level 5 limit values ​​for bar shears, crocodile shears and shearing machines. This standard is applicable to bar shears, crocodile shears and shearing machines. 2 Reference standards
The clauses contained in the following standards constitute the clauses of this standard by being cited in this standard: When this standard is published, the versions shown are valid. All standards will be accepted, and all parties using the standard should explore the possibility of using the most recent version of the following standards. JB/T36231984 Method for measuring the sound pressure of forging machinery. The sound pressure level of the shearing machine for forging and pressing.
The noise A-weighted sound power level L of the shearing machine for forging and pressing during continuous idling operation should not be greater than the provisions of Table 1. Table 1
Nominal force
Production efficiency level Le
3.2 The noise A-weighted sound pressure level L of the shearing machine for forging and pressing during continuous idling operation at the specified position should not be less than 95 (A) 3.3 The pulsating noise sound pressure level L of the shearing machine for forging and pressing during single no-load operation should not be greater than 106dB (A). 4. Noise limits for shearing machines || tt || 4.1 The noise A-weighted sound power level L of a shearing machine during continuous idling operation should not be greater than [05B [A] 4. 2. The noise A-weighted sound pressure level Lm of a shearing machine during continuous idling operation at the specified position should not be greater than 90dA (A). 5.1 The noise limit of the shearing machine during continuous idling operation shall not be greater than the provisions of Table 2. Approved by the State Bureau of Machine Tool Industry on 1999-415-14 and implemented on 2000-01-41. Shearing machine categories: Shearable thickness: The noise A-weighted sound pressure level L at the specified position during continuous idling operation shall be greater than the noise A-weighted sound pressure level L at the specified position during continuous idling operation. Table 3: Shearing machine categories: Shearable thickness: The original level: dB tA:
Engine transmission
Pressure transmission
shaft pressure ... 956y1999
(Standard Record)
Instructions for the use of this standard
All new design, improved design, small batch trial production of new products, or process, after the change of production capacity, the first batch of material shearing machine, fish-type shearing machine, shearing machine products, and the first batch of material shearing machine, fish-type shearing machine, shearing machine products that are subject to quality level assessment and performance test should measure the noise level, and it is recommended to measure the operating noise level. A? For the material shearing machine, fish-type shearing machine, shearing machine products produced in batches, only the maintenance noise level can be measured during the final inspection.
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