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Arc smooth compression interpolation algorithm for high-quality processing

An interpolation algorithm and high-quality technology, applied in computer control, general control systems, instruments, etc., can solve the problems of small line segment interpolation algorithm can not be high precision processing speed, fluctuations, etc., to improve processing quality and processing efficiency, reduce Frequent fluctuations, simple control effects

Active Publication Date: 2018-05-22
SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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Problems solved by technology

[0004] In order to overcome the shortcomings of the existing small line segment interpolation algorithm that cannot be used for high-precision machining and the existence of speed fluctuations, the purpose of the present invention is to provide a parametric spline fitting method, which can identify arc segments in the processing path through the characteristics of the parametric spline curve , by interpolating the arc segment to ensure the machining accuracy and reduce the fluctuation of machining speed

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  • Arc smooth compression interpolation algorithm for high-quality processing
  • Arc smooth compression interpolation algorithm for high-quality processing
  • Arc smooth compression interpolation algorithm for high-quality processing

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Embodiment Construction

[0052] The present invention will be further described in detail below in conjunction with the examples.

[0053] The invention is an arc smooth compression interpolation algorithm for high-quality processing, which divides the processing path into a non-continuous micro-line segment processing area and a continuous micro-line segment processing area according to the double-bow height error limit. For the non-continuous small line segment processing area, the interpolation calculation is directly performed on the straight line segment formed by adjacent command points to ensure the processing accuracy. For the continuous small line segment processing area, according to the curvature value of the discrete command point, the curvature extreme point and the inflection point are fitted, and the broken line processing path is converted into a smooth quadratic rational Bézier curve processing path; then, the quadratic rational Bézier curve is used The arc is recognized by the featur...

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Abstract

The invention relates to an arc smooth compression interpolation algorithm for high-quality processing, and the method comprises the following steps: recognizing a continuous processing region; selecting data points in the continuous processing region, carrying out the fitting of the data points, and obtaining a secondary rational Bezier curve; recognizing arcs according to the curve, and carryingout the transformation of the geometric forms of the arcs; merging the adjacent arcs which belong to the same circle, and obtaining an interpolation curve; and carrying out the arc interpolation on the interpolation curve. The algorithm is high in processing precision and processing efficiency. The method employs the arcs in the geometric forms for interpolation, can precisely calculate the interpolation parameters corresponding to the arc length, reduces the calculation complexity and the frequent fluctuation of speed during processing, and improves the processing quality and efficiency.

Description

technical field [0001] The invention relates to the fitting of parametric spline curves in high-quality machining and the identification and combination of arc segments, and belongs to the technical field of numerical control machining. Background technique [0002] With the development of design and manufacturing technology, more and more people use computer-aided design (CAD) system to design complex parts. However, since the vast majority of CNC systems do not support the transmission of parametric spline data, computer-aided manufacturing (CAM) systems are usually used to cover the free curves or surfaces designed by CAD with a series of polylines within a specific tolerance range, so that Generates NC machining programs consisting of a large number of instruction points. [0003] At this time, if the CNC system adopts the traditional interpolation method, that is, interpolation is performed on the straight line segment formed by adjacent command points, it will inevita...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/41
CPCG05B19/41G05B2219/34083
Inventor 吴文江李浩黄艳韩文业郭安司慧晓
Owner SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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