Research On Dynamic Characteristic And Reliability Analysis Of Diamond Saw Blade

The process is a high-speed machining when the Diamond Saw Blades cut marble, granite, ceramics and other brittle materials. As the ratio of the blade diameter and thickness is very large, working with high-speed, and there are serious vibration problems at cutting process.lt can lead to the reduction of the blade life, produce noise and even affect the health of operators when the saw blades resonance.Therefore, it is necessary to study the dynamic characteristics of the saw blade and the frequency reliability analysis method is put forward in order to more effectively optimize the structure of diamond saw blades, reach to effects of reduce the noise and vibration and avoid saw blades resonance.In the day of pursuit environmental protection and noise reduction,it has high value in theoretical research andsignificance in practical application.Therefore, it is important to study the vibration characteristics and reliability of diamond saw blades and to improve processing quality and life of the diamond saw blade.The dynamic characteristics of diamond circular saw blade were studied in the paper through theoretical analysis and experiment method. The vibration reliability of diamond circular saw blade is analyzed through using probability finite element method. The main work is as follows:The dynamical model of diamond circular saw blade is established through analyzed the dynamic characteristics of diamond circular saw blade, and the differential equation for lateral of diamond circular saw blade's vibration is derived. The vibration characteristic and dynamic characteristic of diamond circular saw blade is studied which laid the foundation to the finite element analysis and reliability analysis of diamond circular saw blade.The finite element modal analysis of diamond circular saw blade is conducted by modal analysis module of ANSYS, and the low order inherent frequency and it's correspond normal vibration mode is extracted. The modal experiments is done on the 3 sets of diamond circular saw blade which diameters are 350mm,400mm,500mm, Compares the results of finite element modal and inherent frequency derived from experiments, which shows that the error of inherent frequency is within 5%, which indicates that the theoretical model laid by finite element is correct. Therefore the model can instead of experiment doing parameterized modal analysis of diamond saw blade, which laid the root for further study on vibrate reliability and stability.There are three main parameters which can influence the natural frequency of diamond circular saw blades:the thickness of the diamond circular saw blade, the diameter and the diameter of the flange plate based on the modal analysis theory.Using probability finite element method to calculate reliability and reliability sensitivity, the finite element technique is introduced in the reliability analysis of diamond circular saw blade, reliability calculation module of the diamond circular saw blade frequency is established, provides the calculation of this kind of problem with ways and means. By calculating the reliability sensitivity of each parameter, research the relationship between diamond circular saw blade structure parameters and the frequency of resonance get the size of structure parameters influenced on the reliability of the diamond circular saw blade.This provides a good reference the diamond circular saw blade optimization design, in order to realize effective for structural modification to achieve the purpose of avoiding resonance.Establishing the curve of the failure probability changed with resonance threshold, provides reference and basis for resonance reliability calculation under different working conditions and different compute requirement.By studying the dynamic characteristics of diamond saw blades, this thesis establishes lateral vibration differential equation and obtains natural frequency of the main parameters of diamond saw blades. At the same time, it verifies the correctness of the finite element model by using modal test and establishes diamond saw blade vibration random parameter structure reliability model. Using the finite element method to calculate the blade reliability and reliability sensitivity, this thesis provides reference for the optimization of diamond saw blades in order to achieve the purpose of avoiding resonance by effectively modifying the structure. In this paper, the research result has a certain engineering value in design and machining of diamond saw blades...