| With the development of aerospace,shipbuilding,and power industries,the requirements for the efficiency and quality of part manufacturing have become increasingly demanding.As an essentail tool in the part manufacturing porcess,the cutting tools are required with higher standards,and the structure of the tools has become more complex.Traditional tool machining methods and equipment cannot meet the current requirements for tool manufacturing especially on the accuracy and efficiency.Therefore,tool manufacturing companies have a greater demand for high-precision and highefficiency five-axis linkage tool grinders.However,currently,there is only little research and development on specialized post-processing software and related algorithms for fiveaxis linkage tool grinders,which greatly restricts the further promotion of five-axis linkage tool grinders.To address the above issues,this paper takes an AB swing-rotary table five-axis linkage tool grinder as the research object and studies the key technologies in its postprocessing process,and develops a dedicated multifunctional post-processing software for the machine tool.The main content of the paper is as follows:(1)Based on the specific structure of the machine tool,the motion chain of the machine tool is analyzed,and the component coordinate system of each axis of the machine tool is established.The kinematic model and rotation angle formula of the machine tool are established by using homogeneous transformation theory.Then,the motion coordinates of each motion axis of the machine tool are calculated according to the specific structure and parameters of the machine tool,and the kinematic solution of the machine tool is completed.(2)In order to control the influence of nonlinear errors on the machining accuracy of parts during five-axis linkage machining,the mechanism of nonlinear errors generated during linear interpolation by the numerical control system is analyzed,and the mathematical model of nonlinear errors is established.The factors affecting nonlinear errors are studied based on the model.In order to limit nonlinear errors,the adaptive interpolation method and tool axis vector plane interpolation algorithm are proposed,and the effectiveness of the method is verified through Matlab simulation.(3)In order to ensure that the feed speed curve is smooth during the machining process and the movement speed of each axis of the machine tool does not exceed the allowable value,this paper establishes a synthesis feed speed model and axis speed model of the five-axis linkage machine tool under linear interpolation.Combined with the characteristics of grinding processing,the actual feed speed of the grinding wheel is analyzed.Then,the five-axis linkage speed control algorithm is proposed based on the above models,and the feed speed and acceleration are constrained.Meanwhile,the feed speed processing flow is proposed.(4)A dedicated multifunctional post-processing software for AB swing rotary table five-axis linkage tool grinders is developed using Java language,and the development process of the software is introduced.The software has the function of processing multiple tool position files and can customize the spindle speed and feed speed.(5)Taking a certain type of high-speed steel solt milling tool as the experimental object,the process route of high-speed steel solt milling tool based on the five-axis platform is proposed.Through the machining of this type of solt milling tool,the effectiveness of the algorithm proposed in this paper and the availability of the postprocessing software are verified.Meanwhile,through actual small-batch production,It is proved,that comparing with the traditional processing methods,the production efficiency and quality will get significant improve by using the five-axis platform and the dedicated post-processing software introduced in this paper. |
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