Design And Analysis Of Five-Axis Machine Tool For Denture Machining And Its Experimental Verification

Tooth play an important role in people’s diet and language,pronunciation,facial shape and so on.Dental health is a focus of people’s concern now.The rise of CAD/CAM has led to the gradual replacement of prosodontic repair by NC machining.However,the main method of making the prosodontic repair in our country is hand-making,the precision is unstable,the processing efficiency is low and the operating environment is poor.Aiming at this problem,our country need to spend a lot of money every year introducing foreign advanced denture processing equipment,and equipment maintenance cost is high.It seriously hindered the improvement of Chinese oral repair,so it is the key of the oral repair to research the denture processing equipment with independent intellectual property rights in our country.This subject analyzed the the functional requirements of denture processing equipment in order to complete denture restoration processing with high efficiency and high precision.and on this basis,the subject designs the Structure layout,distribution of motor function and plan the working pace.Finally the design of five-axis machine tools is completed.The accuracy of machine tool body is the key factor affecting the final machining accuracy of machine tool.This paper establishes the spatial error model of machine tool according to the theory of multi-body system.Using matrix partial differential method to analyze the error sensitivity of the model,defines the sensitivity coefficient and identificates the key error sources.,furthur more,it provides guidance to improve the accuracy of machine tools;Based on the cost-tolerance precision distribution model,the precision of machine tool is determined by using genetic algorithm.Servo feed system is the key part of NC machine tool,its performance is affected directly to the machining precision and machining efficiency of the machine tool.Based on the comparison and analysis of the common servo feed methods,this paper determines the feed method of the machine tool.The modeling of electromechanical coupled mathematics for servo feed system is carried out.The system was designed according to automatic control theory.Set up control parameters.The servo system was simulated,and the dynamic characteristics of the system were analyzed,and the performance of the system was verified.The static and dynamic characteristics of the various parts of the machine directly determine the processing performance of the machine body.In this paper,the finite element theory is used to analyze the mechanical properties of the key structural components with great influence on the performance of the machine,and its static and dynamic characteristics are optimized to improve the static and dynamic characteristics.The static and dynamic characteristics of the machine tool are analyzed,To identify the weak links in the machine,put forward the next step to improve the views.At the end of the paper,It experiments the processing of denture with the design of machine tools in this paper.And the experiment verified the denture made by the disigned five-axis machine tool the requirements of clinical dental restorations.What’s more,the processing efficiency of machine tool is higher.