A series of noise reduction measures have been developed for the noise generated by the saw blade during laser cutting. Commonly used measures are as follows.

(1) noise reduction screen. In the table on the side of the cutting blade on the side of the cutting machine to install the appropriate location to reduce the noise absorption screen, which is a passive noise reduction method, the bottom of the saw blade in the screen rotation, can play a certain noise reduction effect. But the disadvantage is that when the blade needs to be re-installed, you must remove at least one of the two absorption screen, usually outside of this one, the operation process more cumbersome.

(2) laser cutting muffler saw blade. Mainly the use of laser cutting machine in the saw blade on the cutting of some narrow width of the gap, the gap width is generally between 0.15 ~ 0.25mm.

(3) composite structure matrix. This is the most effective method of noise reduction, including the use of multi-piece steel plate welded to form a saw blade matrix, with viscoelastic resin bonding two metal plates and sandwich matrix. Sandwich type silencer saw blade matrix structure mainly includes: outside the two iron plate, and between the two iron plate sandwich. The main material of the interlayer is a damping material that suppresses noise, such as copper, plant fibers, and the like. This method is more obvious noise reduction effect, the drawback is that: this circular saw blade in the circumferential direction is easy due to welding is not strong and crack; In addition, this sandwich substrate after a period of use, the blade may have a very high Of the temperature or other ways of deterioration, damping materials and iron between the combination of changes, so the material silencer effect will be gradually reduced. At present, the sandwich saw blade sandwich material, cracking and other research is also deepening, these problems have also been resolved to varying degrees.

(4) Drill the base of the saw blade. Saw a certain proportion of symmetrical holes on the one hand, is conducive to reducing the radiation area, while the overall stiffness of the saw blade has declined, thereby reducing the radiation noise, on the other hand, saw the small holes blocked Vibration stress wave transmission, coupled with small holes in the air pump damping effect, can effectively reduce the vibration of the blade, reducing high frequency noise. The test shows that such as in the small hole filled with metal damping material, can make this vibration and noise reduction effect is more significant. In addition, the saw blade on the drilling, the blade as a whole to reduce the dipole effect, changing the air around the saw surface characteristics, inhibit the eddy current generation, is conducive to reducing aerodynamic noise. In the hole filled with damping materials, there are some shortcomings: saw blade in the cutting process, the plug of damping materials easy to throw out the safety hazards.

Laser cutting of the saw blade has a certain noise reduction effect, if filled with damping materials, noise reduction effect is obvious.Currently, from the safety and convenience, this kind of laser slit saw more than the above Noise measures have greater innovation.

(5) increase the diameter of the chuck and add the metal rubber material. The calculation shows that increasing the chuck diameter increases the natural frequency of the saw blade, especially the low order natural frequency. Under the same pulse excitation condition, the response of the blade part corresponds to the decrease of the element, so that Under the premise, as much as possible to increase the blade on both sides of the chuck diameter, to reduce the noise of the blade is useful.

In the saw blade and chuck between the increase in cushion damping material, on the one hand is conducive to meet the saddle when the work of the appropriate tension requirements, while the damping effect of the saw blade vibration, but also on the chuck with high frequency vibration. The use of new metal elastomer - metal rubber as a blade between the blade and the chuck. Metal rubber is a metal fiber through the winding, stretching, weaving, molding and a series of processes made of porous damping noise reduction materials. Since the metal fibers are crimped and intertwined in the interior of the material, they have a large elastic deformation ability and excellent energy consumption characteristics. If the stainless steel fiber is made with high temperature, corrosion resistance, oil resistance and other advantages, so the working environment in the saw machine is more harsh conditions, the metal rubber is an ideal alternative to polymer materials, can play a vibration, vibration , The role of sound absorption.