Machine tool movement control method combining the benefit of software and real-time interpolator for sculpture surface machining

Abstract

In the traditional sculpture surface machining process, the G01 code is still the mainstream trajectory. Furthermore, real-time feedrate scheduling and corner smooth algorithm in controller constitute the mainstream method to improve the machining process of short line G01 code in sculpture surface machining. However, the G01 code’s discontinuity and the limits of real-time calculation capacity hinder the use of high-speed machine tools and the accuracy of the machined part. In this article, a new method for sculpture surface machining that considers the advantages and disadvantages of both the computer-aided manufacturing software and the real-time controller is presented to promote the use of a continuous curve tool path. The method mainly transfers the computing-intensive feedrate scheduling and trajectory optimization algorithm in the real-time controller to the computer-aided manufacturing software. Furthermore, the computer-aided manufacturing software generates the machining data, which contain the geometry and feedrate information of the machining process. Finally, the real-time interpolator and the mathematical form of computer-aided manufacturing–generated data are designed simultaneously. In the method, the real-time controller can be designed as simple as possible to release more computing resources to the other real-time intelligent modules. The powerful computational capacity of the software guarantees the optimality of the machining process.

3D Reconstruction of Chinese Traditional Sculpture based on Artificial Intelligence Drawing

“…The study found that the application satisfaction of micro-nano technology in sculpture can reach above 8. Lu et al [8] has also found that the traditional sculpture design method has the defects of discontinuity and poor real-time computing power. It uses computeraided technology and real-time controller to realize a new type of sculpture design technology.…”

A study on a general cyber machine tools monitoring system in smart factories

“…Mou and Gao 17 proposed a reliable process planning method based on fuzzy comprehensive evaluation via historical machining data. Lu et al 18 proposed a new method to transfer the real-time data of machine tool to the computer-aided manufacturing software so as to release the resources of machine controller. These researchers provide different solutions for different applications, which is not enough to improve the intelligence of machine tools.…”

A real-time corner smoothing and interpolation algorithm for short line segments to realize continuous motion of tool axis jerk

“…1 In the machining process, because the corner of G01 tool path is only continuous position (C 0 ), and the discontinuity in tangential and normal directions will lead to the fluctuation of acceleration and jerk of each axis of the machine tool, which will cause tool vibration, destroy the surface smoothness of the parts and reduce the machining quality. [2][3][4] In order to improve the machining efficiency and quality of G01 tool path, experts and scholars have carried out in-depth research on corner smoothing and interpolation technology. [5][6][7] That is, the high-order spline curve is used to interpolate the corner to generate a smooth tool path, and then the corresponding acceleration and deceleration(ACC/DEC) control method is selected for velocity planning and interpolation, which provides interpolation instructions for the position controller of the CNC system to achieve smooth and continuous feed motion.…”

“…Although the calculation efficiency is improved to a certain extent, the C 2 continuous path after smoothing can only ensure continuous motion of tool axis acceleration. Compared with the continuous trajectory of C 3 , the continuous trajectory of C 2 has large fluctuation in the jerk during the operation of the machine tool. 24 The discontinuity and high fluctuation of the jerk curve will lead to the unstable motion of the machine tool and affect the machining quality.…”

“…24 The discontinuity and high fluctuation of the jerk curve will lead to the unstable motion of the machine tool and affect the machining quality. Therefore, the construction of C 3 continuous PH curve is of great significance for realizing real-time corner smoothing and tool axis jerk-continuous motion.…”