Dynamic Characteristics And Noise Reduction Design Of The Base Of Circular Saw Blade

As a tool for cutting products,circular saw blade has the characteristics of high efficiency and excellent cutting performance.It is widely used in cutting wood,stone,reinforced concrete,glass,ceramics and plastics.In order to improve the production efficiency,the diameter and working speed of circular saw blade are continuously improved,but large diameter and high speed may aggravate the vibration and noise pollution of circular saw blade.In recent years,Our country’s circular saw blade matrix industry has developed rapidly,with significant advantages in terms of enterprise scale,product variety,specifications and cost performance.Our country’s circular saw blade production enterprises urgently need to improve their independent innovation ability,realize the noise reduction design by optimizing the dynamic characteristics of the circular saw blade base,and improve the sawing quality and extend the life of the saw blade.Therefore,the low noise circular saw blade has broad market prospects.The noise generated by circular saw blade cutting mainly consists of aerodynamic noise,cutting noise and workpiece noise.Among them,the cutting noise and workpiece noise are determined by the specific working conditions of the circular saw blade,and aerodynamic noise is the main source of matrix noise of circular saw blade.The idling noise of circular saw blade can be improved by changing the structure parameters,material parameters and working speed of circular saw blade.In this paper,the finite element simulation method and modal experiment are used to verify the dynamic and acoustic characteristics of the circular saw blade base design scheme.The structure parameters of circular saw blade base are optimized by orthogonal test.Firstly,the three-dimensional geometric model of circular saw blade matrix is built by SolidWorks software,and then it is imported into ANSYS Workbench to establish the finite element model of circular saw blade matrix.Through the modal analysis and harmonic response analysis,the natural frequency distribution,mode shape and displacement frequency response curve are obtained.At the same time,modal experiments were carried out oncircular saw blade base,and modal parameters were obtained by hammering method to verify the accuracy of the finite element model.According to the finite element model of circular saw blade with different sawtooth structure,matrix thickness,groove type,number of holes and shape of holes,the vibration response analysis is carried out,and the optimal design scheme is selected.Finally,the optimal design scheme of the circular saw blade matrix is analyzed to obtain the sound field frequency response curve;the orthogonal optimization design of the lowest sound power level scheme is carried out to find the optimal structural parameters in the scheme.The anti-vibration and noise reduction effect of the optimized circular saw blade matrix is verified.