The Optimization Design Reacher Of Reducing Vibration And Improving Stifness Of Circular Saw

The vibration and noise of metal circular saw blade are the main problems that have plagued manufacturers and users.In this paper,on the basis of a comprehensive analysis of this topic among the domestic and foreign research status about metal circular saw blades(diamond saw blades and alloys saw blade) and fully understanding of the difficulties of its study and research.On this basis,first apply continuum structural topology optimization techniques to the non-hole blade structure optimal design table firstly based on ANSYS software.At last,combining the experimental modal testing system,comparing and analyzing the inherent characteristics and vibration of the two different structure circular saw blades,using the experimental modal,Further validates the method of topology optimization in the saw blade to reduce vibration and improve the stiffness of the feasibility of optimal design.The main contents can be seen as following:First of all,this paper sets up a mechanical model of circular saw blades and analyzes the plane stress,as well as discusses the vibration characteristics and dynamic characteristics of circular saw blade.On this basis,analyzes the effects of diameter,appropriate tensile stress and the radial groove to the dynamic characteristics of saw blades.All these provide theoretical guidance for optimizing the structural design of reducing the vibration and improving the stiffness of the circular blade.Secondly,continuum structural topology optimization theory has been analyzed and the specific optimization process has been discussed. On the basis of simplified model for a certain extent,combined with the specific requirements of topology optimization and the rule of maximum stiffness of the saw blade,uses the topology optimization function of the ANSYS software to optimize the circular saw blade of no damping hole by topology optimization.Avoiding the decline of the overall stiffness of the circular saw blade caused by opening holes,it can reach dual purposes that improving stiffness and reducing vibration of the circular saw blade.Finally,using the experimental modal testing system to do the experimental modal analysis of two different structure metal circular saw blades,we can compare the natural frequency and vibration mode of the two different structure circular saw blades.According to the test results, we can make further analysis about the influence of the opening damping holes to the dynamic characteristics and the vibration of saw blade; validate the feasibility of topology optimization theory on the circular structural optimization.The result shows that the structural optimization of metal circular saw blades based on the topology optimization can reduce the former twenty-order natural frequency,which means it can achieve the purpose of reducing vibration.The holes of the saw blade can allow expansion without increasing internal stress,and play the role of radiator.Thereby it can reduce the possibility of blade failure due to thermal stress and improve the life of the blade.It provides a new method for structural optimization and design,and also has a great significance to enhance the overall performance of circular saw blades.