The Research On Thermal Error Compensation Technology Of YK3150E CNC Gear Hobbing Machine

Gears are the main transmission parts of most mechanical equipment,which is widely used in various fields of equipment manufacturing industry.Its machining accuracy and quality directly affect the mechanical properties and operational life of products.CNC gear hobbing machine is the master machine for gear production,its machining accuracy has a direct impact on the improvement of gear performance.As the thermal error is an important factor affecting the accuracy of gear hobbing machine,there is an obvious practical need to study how to reduce the thermal error.There are two means to reduce the thermal error,one is error prevention,the other is error compensation.Due to the error compensation has the characteristics of low cost,easy implementation and good compensation effect,it's widely used in the engineering practice.This an in-depth analysis of the YK3150 E CNC gear hobbing machine to analyze the thermal characteristics of the tool carrier assembly,and stablished the model of thermal error compensation,then discussed the implementation strategy of error compensation,the main research work is as follows:(1)the paper based on the classical theory of heat transfer,analyzed the basic theory of finite element thermal analysis for heat transfer of gear hobbing machine.On this basis,calculate the heat output and boundary conditions of three main heat sources of YK3150 E gear hobbing machine,established the finite element model of tool carrier assembly of YK3150 E gear hobbing machine and the simulation analysis is carried out.The results of steady and transient temperature field and steady thermal deformation of tool holder are obtained,it makes preparation for the optimization of temperature measurement points and the establishment of thermal error model in the next step ?(2)The optimization method of temperature measuring points is studied,using fuzzy cluster analysis method to analyze 12 temperature data of key parts of gear hobbing machine,finally selected five best temperature measuring points,reduced the number of temperature sensor arrangements and the coupling between sensors,convenient for subsequent error modeling.(3)Application of least square-multiple linear regression,created the thermal error compensation model of YK3150 E CNC hobbing machine,compared The advantages and disadvantages between off-line compensation and real-time compensation,proposed the thermal error compensation strategy of YK3150 E CNC hobbingmachine.The results of thermal error compensation model are analyzed,and the prediction accuracy error is controlled within 5%.It is proved that the thermal error compensation model based on clustering analysis and least square multiple linear regression is effective,which provides a certain reference for the research of thermal error compensation of this type of machine tool and enriches the theoretical research in this aspect.