Autonomous segmentation method of large-scale complex curved surface robot automatic surface machining

A complex surface and surface processing technology, applied in the direction of instruments, simulators, computer control, etc., to avoid indentation or closed-angle features, reduce the need for manual adjustment, and ensure the uniformity of processing thickness.

CN110488752AActive Publication Date: 2019-11-22武汉数字化设计与制造创新中心有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-11-22

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Abstract

The invention discloses an autonomous segmentation method of large-scale complex curved surface robot automatic surface machining. The method is characterized in that firstly, a surface processing technology model is constructed according to a surface processing mode, and the corresponding maximum curvature threshold of triangle patch segmentation is set; based on the approximate curvature of adjacent triangular patches, the triangular patches are initially segmented; secondly, the ratio of a maximum vector deflection angle of a region and a minimum curved surface segmentation storage area isset, and secondary segmentation preparation is performed; based on an average normal vector of the optimized patches, deflection angles of other adjacent triangular patches to the average normal vector are calculated, the adjacent triangular patches smaller than the maximum vector deflection angle of the region are connected with the optimized patches to achieve secondary segmentation, the optimized patches whose ratio of the region area to a curved surface model area does not meet requirements are eliminated, and the final curved surface segmentation result is outputted. The method is advantaged in that robustness is good, hand-operated adjusting demands are substantially reduced, and result consistency and processing feasibility are good.
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Description

technical field

[0001] The invention relates to the technical field of digital manufacturing, in particular to a method for autonomous slicing of curved surfaces in the process of automatic surface processing of large-scale complex curved surface robots. Background technique

[0002] The triangular mesh model is widely used in the field of modeling and graphics, and can be used to simulate the surface of complex objects. The simplification of the model facilitates the analysis and processing of the surface features of the model. In the process of planning the machining process for large and complex surface components, such as wind turbine blades, aircraft skins, etc., it is necessary to consider their surface characteristics, and divide the machining area of ​​the model surface to be machined according to the surface information.

[0003] At present, there are two main methods of dividing the machining area for surface machining. One is the cross-section method that uses th...

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Embodiment Construction

[0045] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0046] like figure 1 As shown, the present invention provides a method for autonomously slicing curved surfaces in a large-scale complex curved surface robot automated surface processing process, comprising the following steps:

[0047] S1. Construct a surface processing technology model according to the surface processing method, and set the corresponding maximum curvature threshold of the triangular one-sided slice.

[0048]S2. Calculate the curvatures of adjacent triangular patches based on the normal vector declination of the triangular patches in the surface triangular mesh model and...