Speed forecasting method, as well as numerical control device and numerical control system thereof

Abstract

The embodiment of the invention discloses a speed forecasting method which comprises the following steps: calculating section lengths of all planned sections in a processing path and maximum forecasting speed of section end points corresponding to the section lengths; saving the section lengths of all the planned sections and the calculation results of the maximum forecasting speed of the section end points corresponding to the section lengths to finish the preprocessing phase; and performing forecasting processing to each planned section according to the calculation results. The embodiment of the invention further discloses a numerical control device and a numerical control system. By virtue of the methods, the safety and the reliability for processing of the numerical control machine tool is ensured, and the processing efficiency and the processing quality are improved.

Description

technical field [0001] The invention relates to the field of numerical control systems, in particular to a speed look-ahead method, a numerical control device, and a numerical control system. Background technique [0002] Numerical Control System (Numerical Control System) is the abbreviation of numerical control system. It is a special computer system that performs some or all numerical control functions according to the control program stored in the computer memory, and is equipped with interface circuits and servo drives. [0003] During the CNC machining process, the CNC system performs processing according to the processing code input by the user. Usually the user will specify a speed as the target speed in the processing code, but generally does not specify the speed at the end point of each processing section, that is, if some measures are not taken to calculate the speed at the end point of each section, the speed at the end point of each section The control strateg...

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Problems solved by technology

Although this can save time and improve efficiency to a certain extent, there is a certain degree of subjectivity in the definition of sensitive points, which may cause the segments that need to be considered to not be considered, so the reliability of the method cannot be guaranteed.

[0007] (2) Check the sensitive points according to the above-mentioned forward-looking processing method of speed. When performing forward-looking processing on one segment, it is necessary to calculate some data of the subsequent N segments (obtained from the solution), and these data are also used in the forward-looking process of the subsequent segment. It may be necessary, and the forward-looking process handles a large number of processing stages, thus causing a large number of repeated calculations and affecting the overall efficiency

Although the above-mentioned speed-forward processing method provides a basic implementation method, it lacks certain maintainability and scalability

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