Small straight-line section interpolation method of numerical control system on basis of multicycle optimal corner

Abstract

The invention relates to a small straight-line section interpolation method of a numerical control system on the basis of multicycle optimal corner, comprising the following steps of: on the basis of processing precision and limitation of maximum processing speed, determining interpolation parameters of an optimal corner with multicycle trasition of each corner on a processing path according to geometric parameters at the corner on the processing path, the maximum acceleration of each driving shaft of a machine tool and an optimized target; adjusting the interpolation parameters of the optimalcorner of each corner and leading the processing speed of two ends of each small straight-line section to meet reachability requirement; and then carrying out interpolation of straight line sectionsand corners to all the small straight-line sections on the processing path, connecting interpolate point sequences of the straight line sections with interpolate point sequences of corners, sequentially outputting the interpolate point sequences in real time, and driving a numerical control machine tool to conduct actual processing. The method can effectively improve the whole processing speed, has fast calculating speed, meets the requirement of real time processing, has stable and reliable working performance and strong practicability and can be applicable to various three-shaft numerical control machine tool with different types.

Description

Technical field The invention relates to an interpolation method for a small straight line segment of a numerical control system based on a multi-period optimal corner, and belongs to the technical field of digital control processing of a numerical control system. Background technique When CNC machine tools process complex curved surfaces, they usually discretize the processed curved surface into a large number of small straight line segments within the set processing accuracy. In the process of processing small straight segments, the processing speed and processing accuracy of CNC machine tools restrict each other. Because in actual processing, the processing direction of the CNC machine tool has to be changed frequently, causing the machine tool to start and stop frequently, which limits the processing speed, and is prone to vibration, which affects the processing accuracy and surface finish of the processed surface. Especially at the corners, due to the sudden change of the...

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Problems solved by technology

However, this method directly determines the machining trajectory of the tool at the corner, and also does not make full use of the maximum acceleration capability of each drive axis of the CNC machine tool

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