Study On The Parameter Optimization Of Noise-reduction Holes Of The Large Diameter Diamond Saw Blades

Diamond circular saw blade is the most widely used diamond cutter in stone cutting and processing areas,the large diameter diamond circular saw blade is generally adopted in sawing the granite and other hard stone materials by far.Diamond circular saw blade belongs to typical large radius-thickness ratio component and has relatively low axial stiffness.Diamond circular saw blade continues to develop in thinning direction in order to reduce the saw kerf,save stone resources.The result of it is that transverse vibration and noise is more prone to happen during the sawing process.Punch noise-reduction hole on the surface of the diamond circular saw blade is a common way to reduce the vibration and noise.This paper takes the large diameter diamond saw blade as the research object,finds the vibration performance and acoustic characteristic of it.The conclusions can provide a basis for optimal design of the vibration and noise reduction structure of diamond circular saw blade.The study of vibration performance and acoustic characteristic of diamond circular saw blade is based on the FEM/BEM.Modal projection method is Introduced to solve the vibration response of diamond circular saw blade,and the vibration response is projected to the boundary element grid as boundary conditions.The acoustic radiation characteristic of diamond circular saw blade is calculated by boundary element method.The influence of noise-reduction hole structure on the vibration and sound field of diamond circular blade and the mechanisn of noise reduction is explored.The orthogonal simulation optimal design of double rows noise-reduction hole structure of diamond circular saw blade is carried out.The noise-reduction hole structure of diamond circular saw blade is optimized through FEM/BEM joint simulation analysis and a active design method of noise-reduction hole structure of diamond circular saw blade is proposed.The research shows that punching noise-reduction hole will lower the natural frequency of diamond circular saw blade and the natural mode of vibration is axial vibration,which mainly affects the vibration performance of diamond circular saw blade.The mechanism of reducing vibration and noise is mainly by separating the axial vibration of diamond circular saw blade,separate the some mode of vibration which has large area of peak amplitude into mode of vibration which has small area of peak amplitude,in order to achieve the aim of reducing the vibration and noise.The double rows noise-reduction hole can further separate the mode of vibration which one row noise-reduction hole doesn’t separate,and it will get better reduction of vibration and noise.Through orthogonal simulation analysis,the sensitivity of structure parameters of noise-reduction hole to the acoustic power level is concluded.The optimized parameters combination of noise-reduction hole of Φ1300 diamond circular saw blade is found and the shape optimization of noise-reduction hole is conducted.This paper introduces modal projection method to analyze the the vibration performance and acoustic characteristic of diamond circular saw blade,simplifies the calculation on the premise of ensuring the computational accuracy and provide some basis for the research on the mechanism of reducing vibration and noise.The orthogonal simulation optimization is a reference for the active design of diamond circular saw blade.