High Rigidity Lightweight Design For Key Parts Of XZH246Z High Speed Direct Drive High Precision Machine Tool

With the rapid development of my country’s social economy,the market demand for small parts processing equipment for 3C electronic products will further expand.Due to the blockade of foreign technologies and the relative lag of domestic related research technologies,the machining accuracy and efficiency of domestic machine tools are low and high.Most of the precision machine tools rely on imports.At present,in the design of machine tools,designers often use an excessive safety factor.On the one hand,it does not meet the national strategic direction of energy conservation and emission reduction.On the other hand,it greatly increases the manufacturing cost of the enterprise.As a result,the machine tool cannot meet the machining accuracy requirements of 3C products.This paper takes the XZH246 Z high-speed direct-drive high-precision CNC machine tool produced by a certain enterprise as an example to study the high-rigidity and lightweight design of its key parts.The main research work is as follows:(1)Analyze the structural characteristics of key parts of XZH246 Z machine tool and determine the load transfer law of key parts;Analyze the dynamic and static performance of the whole machine tool,and determine the bearing characteristics of key parts and the weak links of the machine tool according to the finite element analysis results of the whole machine,so as to lay the foundation for the subsequent optimization of key parts.(2)A comprehensive optimization strategy for integrated gantry structural parts is proposed,combined with the load path method of force balance principle and functional section decomposition method,a fast realization method of force transfer path visualization of three-dimensional bearing model under complex load is formed,the bearing laws of different path tracks are analyzed,and the improvement scheme of gantry outer contour is put forward;After the gantry structure is optimized and the topology performance of the gantry is optimized,the topology model of the gantry is extracted and verified.(3)Analyze the dynamic and static characteristics of the chute,formulate the optimization scheme of the chute,give the sensitivity relationship between the size parameters of the stiffener plate and the structural performance of the chute,build the mathematical model of key size optimization,determine the best parameter combination of key size,and carry out simulation analysis to verify the optimization effect of the chute.(4)The dynamic performance of element structure with different shapes of sand outlet is studied,and the optimal parameter combination of element structure and sand outlet size is given to verify the effectiveness of element structure;The mathematical model of rib plate optimization is established,and the new model of bed element structure improvement is obtained to verify the mechanical properties and lightweight effect of the machine tool after the improvement of key components.