| As a typical cutting tool,Carbide circular saw blades are widely used for cutting wood,metal,and other materials due to their good performance and high processing efficiency.However,the widely used static test cannot accurately guarantee the performance of the circular saw blade in dynamic operation,and no testing equipment directly defines the dynamic stability of the circular saw blade substrate.In this paper,ANSYS finite element software is used to study the natural frequency,mode shape,and other dynamic stability of circular saw blades,and the design and construction of circular saw blade dynamic detection equipment and detection systems guide the production and detection of circular saw blades.Through experiments,the influence of single-factor variables on the dynamic stability of circular saw blades is studied,and the corresponding mathematical model is established,which lays the foundation for finally establishing the mapping relationship between the dynamic stability index of the circular saw blade matrix and the static geometric parameter tolerances.The main research contents of this paper are as follows:Utilize ANSYS software to perform pre-stress modal analysis on carbide circular saw blades,and control parameter variables such as saw blade speed,thickness,diameter,etc.Then the stress distribution,deformation law,low-order model,and natural frequency change law of the circular saw blade are obtained.The research results show that the parameters such as the speed,thickness,and diameter of the circular saw blade will affect its stiffness to varying degrees,and then affect its natural frequency.The increase in speed and thickness can increase the natural frequency of the circular saw blade and the thickness parameter has a greater influence,and the increase in diameter can reduce the natural frequency of the circular saw blade.This part provides a theoretical finite element simulation explanation for the follow-up circular saw blade dynamic stability experiment.Combining the actual research status of the enterprise,the requirements for the dynamic detection equipment of circular saw blades are put forward,and the detection system of the dynamic detection equipment of circular saw blades is designed,and the structure composition and detection principle of the detection system is determined.According to the requirements of the detection system,the hardware module of the detection system is analyzed and built,and the sampling point and sampling frequency selection basis of the laser displacement sensor in the dynamic detection system are designed and given,which provides suggestions and guidance for the subsequent large-scale production of dynamic detection equipment for enterprises.At the same time,it provides an experimental platform for the dynamic stability of the circular saw blade.The dynamic stability of circular saw blades at a certain speed are analyzed experimentally,and the influence of single-factor variables such as speed,time,thickness,diameter,and other parameters on the dynamic stability of circular saw blades is studied separately.Then obtain the axial displacement curve of the circular saw blade under the corresponding background conditions.The research results show that the increase in the rotation time of the circular saw blade can reduce its lateral vibration amplitude,and the small-diameter carbide circular saw blade that is clamped for the first time reaches a stable state by preheating and idling for a certain time,which guides the production of circular saw blades.As the speed increases,the amplitude of the lateral vibration displacement of the circular saw blade decreases and the waveform tends to be flat;with the increase in thickness and diameter,the amplitude of the lateral vibration displacement of the circular saw blade decreases,and the dynamic stability is improved.The Fourier series approximation is used to obtain the mathematical model of the lateral vibration displacement of the circular saw blade,and the dynamic stability of the circular saw blade and its periodic change trend are described by mathematical language.This research lays the foundation for the final establishment of the mapping relationship between the dynamic stability of the circular saw blade substrate and the static geometric parameter tolerances.The subject is to conduct simulation and experimental research on the dynamic stability of circular saw blades based on the production and use indicators of circular saw blades.At the same time,this research initially builds dynamic testing equipment for circular saw blades based on industry needs.This research provides theoretical support and guidance for the industry’s production and testing links and application stages. |
PDF Full Text Request