Precision error control based orbit segment transfer processing algorithm for numerical control machine tool

A CNC machine tool and error control technology, applied in the direction of digital control, electrical program control, etc., can solve problems such as the application of large trajectory segment connection processing and the scarcity of related research on straight line connections as acute angles.

Inactive Publication Date: 2013-08-28
KUNSHAN TIANDA JINGYI NUMERICAL CONTROL SCI &TECH DEV
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Problems solved by technology

It is the main connection processing method currently used, but so far it is mainly for the connection processing between straight line segments, and it is less involved in the connection processing of straight lines and arcs. In-depth analysis and research cannot be carried out, and it is often aimed at the connection processing of small line segments, but it is not necessarily very suitable for the connection processing of large trajectory segments

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  • Precision error control based orbit segment transfer processing algorithm for numerical control machine tool
  • Precision error control based orbit segment transfer processing algorithm for numerical control machine tool
  • Precision error control based orbit segment transfer processing algorithm for numerical control machine tool

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Embodiment

[0238] Embodiment: A trajectory segment transfer processing algorithm based on precision error control for CNC machine tools

[0239] The connection between the current trajectory segment and the next trajectory segment can be divided into two types: 1. Connecting with a straight line segment; 2. Connecting with an arc segment.

[0240] For the first case, when it is connected with a straight line, such as figure 1 As shown in the connection between the current trajectory segment and the straight line, in the interpolation operation, the distance traveled each time is determined by the combination of the interpolation period and the movement speed, that is, the step distance ΔL=VT, T represents the interpolation period, and V represents the movement speed . Since the interpolation period and the actual distance to be traveled in the current segment may not be an integral multiple of the phenomenon, it will appear in the last interpolation period of the current trajectory segm...

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Abstract

The invention provides a precision error control based orbit segment transfer processing algorithm for numerical control machine tool; elaboration and analysis are performed aiming at the current two transfer processing methods of connecting the orbit segment with a straight line and connecting the orbit segment with an arc and the error situation; for the error of the transfer processing of the orbit segment and the straight line, the change relation of the generated error and an interpolation surplus and an included angle is analyzed according to the difference of the velocity vector included angle; the transfer processing method and the error calculation of the orbit segment and the arc are elaborated based on two aspects of whether the orbit segment and the arc are on the same plane and the included angle of the orbit segment and the tangent line of the arc. Compared with the prior art, the analysis for the transfer processing method and the error are more complete; furthermore, the analysis for various transfer situations is more detailed and more thorough, and therefore, the higher transfer precision and the higher transfer velocity can be obtained.

Description

technical field [0001] The invention relates to a track segment transition processing algorithm based on precision error control for a numerical control machine tool, belonging to the technical field of computer numerical control. Background technique [0002] Because any workpiece, no matter what shape it is, is ultimately composed of a segment of trajectory segments (arc, straight line), there are transfer points between the trajectory segments, resulting in the problems of transfer transition method and transfer accuracy. In order to ensure the accuracy of the workpiece, some scholars have proposed to perform acceleration and deceleration processing between each trajectory segment, that is, each segment undergoes three processes of acceleration, uniform speed, and deceleration, which will cause frequent start and stop of the machine tool, and the feed speed is too slow. The expected speed cannot be guaranteed, and the processing quality is not ideal. Some scholars interp...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/19
Inventor 刘清建王太勇支劲章张玥王冬卢志理
Owner KUNSHAN TIANDA JINGYI NUMERICAL CONTROL SCI &TECH DEV
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