Speed connection method for numerical control system

Abstract

The invention relates to a speed connection method for a numerical control system, which comprises the following steps: performing dynamic pre-read processing on a workpiece program of the numerical control system to obtain the speed change length and the corner connection error between adjacent workpiece program segments; calculating the initial connection speed between the adjacent workpiece program segments according to the corner connection error, the programming feed speed of the workpiece program, and the processing precision required by a user; and automatically adjusting the connection speed between the adjacent workpiece program segments according to the preset maximum acceleration of each servo shaft of the numerical control system, the speed change length between the adjacent workpiece program segments and the initial connection speed between the adjacent workpiece program segments. The method greatly improves the execution efficiency of a numerical control machine tool, ensures that the connection error generated at a corner between any workpiece program segments in the moving process of the numerical control machine tool satisfies the working accuracy requirements of users, improves the control precision of the system, achieves the speed smooth transition, and can be matched with various acceleration and deceleration algorithms.

Description

technical field [0001] The invention relates to the speed connection processing technology of numerical control machine tools in the field of numerical control technology, specifically a corner angle between workpiece programs generated by CAD / CAM, machining accuracy required by users, maximum acceleration of each axis and machining along each axis The speed conversion length between the degree segments automatically adjusts the connection speed at the corner. The speed connection method used in the numerical control system. Background technique [0002] In the modern manufacturing industry, the high-speed and high-precision machining of the CNC system can provide strong support for the manufacturing industry to pursue the goal of "fast, low consumption and high quality". The high-speed and high-precision motion control method of the CNC system is an important means to improve the machining efficiency and quality of the CNC machine tool. The International Production Engineer...

AI Technical Summary

Problems solved by technology

This speed connection method is a compromise between speed and precision, which can ensure the speed continuity between two workpiece program segments and ensure the smoothness of the workpiece surface. However, if the workpiece program segment in the workpiece program is very Short, it is difficult for the movement of the CNC machine tool to reach the programmed feed speed; and if there are one or more shorter workpiece program segments after a longer workpiece program segment, it is likely that during the deceleration process of the longer workpiece program segment, One or more short workpiece program segments have been executed, resulting in large shape errors on the surface of the processed workpiece, and it is difficult to achieve an optimal combination of precision and speed. Even if the lengths of adjacent workpiece program segments in the workpiece program have little difference, It is difficult to analyze the connection error between adjacent workpiece program segments, which brings uncertain factors to the determination of the machining accuracy of the CNC system

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