Curved-surface partitioned processing trajectory planning method based on boundary residual height constraint

Abstract

The invention belongs to the technical field of high-precision and high-efficiency milling processing of complex curved surface parts, and relates to a curved-surface partitioned processing trajectoryplanning method based on boundary residual height constraint. The curved-surface partitioned processing trajectory planning method comprises the steps of: defining a residual height at a boundary ofa processing region, analyzing geometric features of the processing region, solving of cutter contact point positions under the boundary residual height constraint, and constructing cutter contact point boundaries; selecting one cutter contact point boundary as an initial processing trajectory according to processing requirements, and calculating a geodesic line of the cutter contact point boundary along a line spacing direction; establishing a functional relationship between the residual height and an arc length between the adjacent cutter contact points, generating cutter contact points recursively along the line spacing direction, calculating an arc length error of the tail end cutter contact point and the cutter contact point boundary, and acquiring adjusted cutter contact points through sensitivity analysis; and connecting the cutter contact points corresponding to the geodesic lines along a feed direction, and completing trajectory planning according to the boundary constraint and step length constraint. The curved-surface partitioned processing trajectory planning method is suitable for partitioned processing of complex curved surfaces, can reduce the gear marks and improvethe processing quality.

Description

technical field [0001] The invention belongs to the technical field of high-precision and high-efficiency milling processing of complex curved surface parts, and relates to a method for planning curved surface partition processing trajectory based on boundary residual height constraints. Background technique [0002] With the rapid development of aerospace, energy power, automobile and ship and other fields, the performance requirements of high-end equipment are increasing, which leads to the increasingly complex structure and configuration of key complex curved surface parts. How to realize high-precision and efficient processing of such parts has become a limitation The key link of high-end equipment performance. The traditional global processing method with uniform process parameters has reduced applicability and is difficult to apply to complex curved surface parts. In order to meet the processing requirements of such parts, the partition processing strategy is often us...

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Problems solved by technology

However, this method must adopt the minimum line spacing to ensure that the processing quality requirements are met inside the processing area, resulting in abnormally dense processing tracks, which limits the improvement of processing efficiency and has certain limitations

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