Research On Static And Dynamic Characteristics And Structure Optimization Design Of Diamond Frame Saw Blade System

Diamond frame saw is an important machine for processing wide-format stone plates and has a wide range of application prospects.Saw blade system directly determines the quality and production efficiency of the plates.From the kinematic analysis of the saw blade system,this paper analyzed the reasons why the existing diamond frame saws could not achieve stable sawing.On this basis,the load characteristics and static and dynamic characteristics of the saw blade system were studied,and a series of optimizations were made to the structural dimensions and installation process of the saw blade system to provide guidance for the realization of efficient and stable sawing.Through kinematic analysis,the reasons for the inadequate performance of horizontal diamond frame saw were investigated,and a new curved type sawing trajectory was proposed.The trajectory was verified by sawing granite and the sawing force of individual segment was tested to obtain the load characteristics of the saw blade system under this trajectory.The finite element method was used to study the static characteristics of the saw blade and the saw frame in the saw blade system,and the critical buckling load of the saw blade was obtained through nonlinear buckling analysis.It was found that the static stiffness of the saw blade in the y and z directions was poor,which was its weak link.And the bending and torsion in the z direction mainly occured during buckling,which was consistent with the theoretical analysis.The static stiffness of the saw frame met the design requirements,but affected by the boundary conditions,the upper and lower parts of the frame had different deformations after being loaded,which was not conducive to the accurate installation of the saw blade.The lateral vibration model of the saw blade was constructed using the continuous system vibration theory.The first sixth-order vibration mode of the saw blade was obtained through finite element simulation analysis,and the accuracy of the model was verified.The dynamic characteristics of the saw blade were studied by harmonic response analysis,and the results showed that the saw blade would have the largest z-direction displacement at the first second frequency.Finally,the influence of the size and quantity of the segment on saw blade modal was studied,and the modal vibration of the saw frame was analyzed.The topology optimization of the saw frame based on the variable density method with strain energy as the optimization target was carried out,and a more ideal material distribution scheme was obtained.The optimal saw blade structure parameters were gotten by response surface method,and the saw blade installation process was optimized.And the dynamic and static performance of the optimized saw blade system had been improved.