Research On High-speed And High-precision Algorithm Technology Of Multi-axis CNC System

With the rapid development of the CNC industry,the requirements for machining accuracy are also increasing.Therefore,the research on high-speed and high-precision CNC machining technology is particularly important.The research on high-speed and high-precision CNC technology is the key technology to improve the efficiency and accuracy of CNC machining.In actual processing,the contour of the workpiece is often irregular.When processing complex contours,it is usually described by continuous small line segments.High-speed and high-precision CNC machining is realized by processing the continuous small line segments.In this paper,by designing the acceleration and deceleration control algorithm,the smooth transition control algorithm and the forward-looking control algorithm,the small line segment is processed and the algorithm is simulated and verified.In order to carry out simulation verification,the control point coordinate information of the trajectory path is required.The method adopted in this paper is to export the G code of the machining path through the post-processing module in the UG CNC machining module,and then compile the G code interpreter through Python to get the point information identified by MATLAB is used for the research of numerical control algorithm.Firstly,the basic principle and implementation process of the linear acceleration and deceleration control algorithm and the S-shaped acceleration and deceleration control algorithm are studied,and the advantages and disadvantages of the two algorithms are analyzed.Finally,a reasonable processing method is selected for different processing line lengths.Secondly,the basic principle and implementation process of the speed smooth transition control algorithm between small line segments are studied,including the direct transition control algorithm,the straight transition control algorithm,the arc transition control algorithm,and the cubic B-spline curve transition control algorithm,and the performance of each algorithm is analyzed.Advantages and disadvantages and suitable application environment.Then the basic principle and implementation process of the speed look-ahead control algorithm are studied.This paper completes the reasonable planning of the global control point speed by designing the look-ahead buffer module,the forward planning module,the forward correction module and the reverse planning module.Finally,the above algorithm is verified by MATLAB simulation.The simulation results prove that the acceleration and deceleration control algorithm,smooth transition control algorithm and forward control algorithm studied in this paper can reasonably plan the speed of the control point of the machining path and ensure the stability of the machining process.The research on high-speed and high-precision numerical control technology is of great significance.