Arc smooth compression interpolation algorithm for high-quality processing

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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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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