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An interpolation control method for self-identifying interpolation types

A control method and self-identification technology, applied in the direction of digital control, electrical program control, etc., can solve the problems of less calculation and insufficient processing accuracy

Active Publication Date: 2016-12-07
江苏四方包装纸业有限公司
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Problems solved by technology

[0006] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a simple uniform B-spline method with a small amount of calculation, adopts an interpolation control method that can automatically identify the type of interpolation, and effectively solves the identification of the type of interpolation. A self-identifying interpolation control method for problems such as segmentation, start-stop, and insufficient machining accuracy

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  • An interpolation control method for self-identifying interpolation types
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  • An interpolation control method for self-identifying interpolation types

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Embodiment Construction

[0045] Below in conjunction with accompanying drawing and embodiment the present invention is further described, with reference to accompanying drawing:

[0046] Such as figure 1 , an interpolation control method for self-identifying interpolation types, comprising the following steps:

[0047] The first step is to use the graphic acquisition equipment to take photos of the workpiece, and use the matlab software to process the photos to obtain the processing location point information.

[0048] The second step is to construct a uniform B-spline curve. According to the requirements of spline interpolation and the characteristics of B-spline, the value form of the node vector is:

[0049] U=[-p+1,-p+2,...,0,1,2,...,p] (1)

[0050] where p is the degree of the spline basis function. The calculation formula of the uniform B-spline basis function can be obtained from the recursive formula of the spline basis function, and the specific formula is as follows:

[0051] ...

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Abstract

A kind of interpolation control method of self-identifying interpolation type, using graphic acquisition equipment and matlab software to obtain processing position point information, using B-spline theory to construct a fixed set of basis functions, inversely calculating control points, using B-spline theory The average parameter theory is used to calculate the curvature change of the machining track, and automatically identify the interpolation type of the machining track according to the characteristics of the curvature change. Calculate the speed limit curve for the spline interpolation segment according to the bow height error, judge the speed limit value calculated according to the bow height error and the given maximum speed limit, and take the smaller value of the two to form a new speed limit curve. The eigenvalues ​​are calculated for the circular interpolation segment and the linear interpolation segment, and then the corresponding interpolation calculation is performed. The invention provides an interpolation control method that can automatically identify the interpolation type, uses the B-spline theory with a fixed basis function to perform the interpolation calculation, and effectively improves the processing accuracy and efficiency of a self-identifying interpolation type interpolation control method.

Description

technical field [0001] The invention relates to the field of numerical control systems, in particular to numerical control machine tools and other fields involving path planning, and is an interpolation control method for self-identifying interpolation types. Background technique [0002] The core of the CNC system field is the CNC interpolation technology. Compared with the products of some developed countries abroad, China's CNC machine tool technology is still relatively backward, especially in terms of high speed and high precision. China is in the period of industrial transformation. The rapid growth of automobile, steel, machinery, electronics and other industries constitutes a huge demand for CNC machine tools, but there are still many problems in its core technology, that is, interpolation technology. [0003] When processing some complex curves and curved surfaces, the path trajectory of the tool may be a free-form curve, or an arc or a straight line. If only manual...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/4103
Inventor 杨亮亮许守金史伟民
Owner 江苏四方包装纸业有限公司
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