How to reduce the noise of punching machine in industrial workshop?

Punch machine sound insulation and shock absorption

With the rapid development of industry, the production of workshop depends more and more on mechanized equipment. At the same time, however, a large number of equipment will produce noise during operation, which will seriously endanger the health of workshop workers. Therefore, it has become necessary to adopt sound insulation and noise reduction engineering in the workshop. Usually, the noise of the punch press is above 90dBA, and the noise control is not timely, which will do great harm to the health and psychology of the equipment operators and other people in the workshop, reduce the production efficiency, seriously lead to the "noise deafness" of employees and have a great impact on the environment. According to the Hygienic Standard for Noise in Industrial Enterprises, the noise value of workers exposed to noise for 8 hours shall not exceed 85dB. After the above three measures are taken to deal with the noise of the punch press, the noise value will be controlled below 85dB.

Sound insulation and noise reduction engineering majors control the noise of workshop equipment and create a quiet production environment for the workshop. Let's analyze the noise control methods and noise reduction measures in the stamping workshop.

First, the noise source of stamping workshop

1, because the punch of the punch suddenly decelerates when it hits the workpiece at high speed, it causes strong aerodynamic noise, which is usually called deceleration effect.

2. Due to the rapid approach of the mold, the noise generated by the air ejected from the mold surface is called the air ejection effect.

3. When the punch begins to impact the blank, the blank suddenly expands, producing impulse noise, which is called blank expansion effect.

4. Under the impact load, the parts of punch structure are excited to produce vibration and noise, which is called the excitation effect of machine tool structure. It can also be called excited structural noise or solid noise.

Second, the noise reduction measures of stamping workshop

1, the noise source is reduced, and the overall structure of the punch shop is converted into a sound insulation structure.

2. Set up sound insulation walls between workshops.

3. Reducing the noise of the die, reasonably selecting the mating clearance of the concave-convex die can reduce the noise by 5dBA, changing the convex geometry, replacing the flat die with the stepped die and the inclined blade die can also reduce the noise by about 5- 10dBA, and rationally using the sound absorption, sound insulation and shock absorption devices.

4. Noise reduction of the punch itself, reform the existing traditional process design, reduce the noise from the punch itself, adopt low-noise production equipment, and focus on solving the noise source problem.

5. Control the noise of transmission path, isolate the transmission path of noise, and reduce the reverberation time in the workshop.

6, equipment sound insulation, by adding a sound insulation device to the mechanical equipment that produces noise, thus reducing noise at the source and improving the overall noise reduction effect. The sound insulation device needs to be designed according to the field survey data. Because the sound source type and the ventilation and heat dissipation of the field environment are different, the data parameters have different threshold ranges. The noise can be reduced by about 8dBA with sound-absorbing sound insulation screen and sound insulation cover in the mold area.

7. The noise reduction of the punch press is generally to add a sound insulation cover to the punch press to design the sound insulation of the noise source of the punch press. The noise of the punching machine is enclosed in a small space in the form of a soundproof cover to reduce the covering around the box. The noise control of the punch press mainly includes the measures of sound insulation room or sound insulation cover for the split enclosure of the punch press unit, and the technical scheme of overall control of the noise in the punch press workshop, so as to ensure that the environmental noise at the factory boundary meets the relevant requirements and can directly and effectively realize the expected noise control of the punch press. The fully enclosed sound insulation cover can reduce the noise by about 20 decibels. The cover can be assembled and generally covers a large area.

8. Sound absorption and noise reduction. The purpose of sound absorption is to reduce the reflected sound in the workshop, which can generally reduce the noise by about 6dBA.

The most ideal scheme of noise control in stamping workshop is to consider noise control before equipment selection, installation and workshop construction, and adopt sound insulation and noise reduction engineering before installation, which can not only reduce noise reduction cost, but also achieve better noise reduction effect. For the later workshop noise control, it is necessary to conduct on-the-spot investigation and make a reasonable solution after obtaining the noise coefficient. Hangzhou Yayin Environmental Engineering Co., Ltd. is a one-stop environmental protection, sound insulation and noise reduction enterprise integrating industry, civil use, commerce, entertainment, traffic noise pollution, detection, scheme, construction and acceptance. With more than 65,438+00 years of experience in sound insulation and noise reduction of mechanical equipment and scenes, customized mute products. Provide KTV bar sound insulation, air conditioning room sound insulation, power distribution room sound insulation and noise reduction, soundproof room, sound absorption barrier services, handle all kinds of environmental pollution complaints of low, medium and high frequency noise and vibration, effectively protect noise and deal with noise prevention and control issues. ...