Study On Optimum Design Of Combined Wire Saw Unit System

Diamond rope saw group saw machine has been used as a main advanced stone mining tool.It has excellent performance in stone mining and demolition and decomposition of large structures,buildings,piers,etc.However,the group saw machine has large volume,heavy weight,high cost of material,production and transportation.Structural analysis and optimization of diamond rope saw group saw machine has become an unsolved problem in its engineering application.The key problem is also of great significance to improve the performance-price ratio and market competitiveness of the combined rope saw set.This paper takes the ZJP56 combined multi-rope diamond bead rope saw set manufactured by Guilin Tebang New Material Co.,Ltd.as the research object,uses virtual prototyping technology and theoretical analysis to build its virtual prototyping analysis model based on the actual structure,material and driving parameters of the prototype physical model,in order to study the dynamic characteristics of the sawing mechanism of the combined rope saw set,and the specific workmanship.As follows:Firstly,combined with the structural characteristics of the combined rope saw group,the dynamic model of the combined rope saw group was simplified to a cantilever beam,and the relationship between the deflection deformation of the cantilever beam and the working acceleration was obtained.In order to ensure the normal operation of the combined rope saw group and avoid safety accidents,the stability of the column of the combined rope saw group was analyzed.The simplified cantilever beam of the column was judged to be a medium flexibility bar by calculation,and the permissible compressive stress of the column was calculated by using the linear empirical formula.In order to study the influence of the vibration on the whole machine when the combined rope saw group saw is working,the cantilever beam model which is simplified as a single degree of freedom vibration system is combined with the structure of the column of the combined rope saw group saw for dynamic analysis,the deflection and rigidity of the column are calculated,and the natural frequency of the column of the combined rope saw group saw is obtained.Secondly,combined with the movement process of the combined rope saw group,the combined rope saw group was simplified to a simple beam model for dynamic analysis,and the support reaction force and deflection deformation at both ends of the simple beam model of the combined rope saw group were obtained.Combining with the dynamic modeling of the combined rope saw group,the virtual prototype technology and theoretical analysis are combined to build its virtual prototype analysis model based on the actual structure,material and driving parameters of the physical model of the prototype.Through the kinematics simulation calculation of four motion conditions,the kinematics parameters such as speed,acceleration and displacement of the virtual prototype model of the combined rope saw group are obtained.Kinematics parameters and load changes in the lifting device.This paper studies the kinematic changes of the combined rope saw in the work,and selects the appropriate working conditions to provide data support for the subsequent finite element analysis.Then,the static analysis of the model of the combined rope saw group under the external load obtained in the virtual simulation is carried out by using the finite element analysis software.The stress,strain and the distribution area and change of the total deformation of the whole machine and the key parts of the combined rope saw group are obtained,which provides an important demonstration role for the structural safety design.In order to study the failure condition of the combined rope saw set,the finite element analysis of the lifting device which is most likely to cause failure of the combined rope saw set was carried out to reverse solve the failure load,and the ultimate load of the combined rope saw set was obtained.Provide data support for early protection and rational use of material design.Combined with the natural frequency of the column calculated by the dynamic modeling,the modal analysis and harmonic response analysis of the column of the combined wire saw group saw machine are carried out,and the peak amplitude change of the six order natural frequency response of the combined wire saw group saw machine under the external excitation load is obtained,which can avoid the peak frequency in the engineering application and design,and provide reference for the engineering design and safety production.According to the above analysis,in order to get a lighter combination of wire saw group saw under the structural strength.In this paper,the mathematical model of single constraint lightest design is built for the combined rope saw group saw mechanism,the total weight and the maximum composite stress of the structure of the combined rope saw group saw machine are optimized by the method of combining the guide weight method with the finite element method,and the optimized structure of the combined rope saw group saw machine is obtained,and the optimized combined rope saw group saw machine is obtained by the finite element analysis Stress,strain and total displacement of the structure.The results show that the weight reduction of the structure is more than 15% while the structural strength is stable.