Method and system for planning equal-overlapping-rate laser cladding path

Abstract

The invention relates to a method and system for planning an equal-overlapping-rate laser cladding path. The method comprises the following steps: triangularizing point cloud data by adopting a Delaunay triangularization algorithm; determining a first cladding path according to the triangularized point cloud data; determining processing points with chord lengths spaced by a set distance in the first cladding path to generate a first processing point set; acquiring points with chord lengths from the processing points in the first processing point set as set values on the outline vertical to thecladding direction so as to generate a second path point set; and adopting a polynomial fitting function to generate a second cladding path according to the second path point set, and repeating the above steps to complete planning of the part surface cladding path. According to the method and system for planning the equal-overlapping-rate laser cladding path provided by the invention, the cladding path is planned without being influenced by the sparsity of the point cloud in a manner of triangularizing the sparse point cloud, so that the fitting error of the path is reduced, and the claddingeffect is further improved.

Description

technical field [0001] The invention relates to the field of cladding path planning, in particular to a planning method and system for laser cladding paths with equal overlap ratios. Background technique [0002] The laser cladding strengthening of free-form surfaces has been extensively studied at present. For laser cladding of free-form surfaces of any shape, if there is no three-dimensional map of the surface in advance, the point cloud data of the surface is collected through the point cloud acquisition device, and then according to the point cloud data. Path planning is an effective method. [0003] A cladding path planning method is disclosed in the prior art, which selects data points passing through a certain section after collecting the surface point cloud of the part, and uses polynomial fitting to fit these points as the first cladding path. And determine the path point set Ω according to the equidistant step method on the path s1 ={p 1 ,p 2 …p n}. On each c...

AI Technical Summary

Problems solved by technology

[0004] When the above path planning method with equal overlap rate is applied to sparse point cloud for path planning, due to the small number of sparse point cloud and the large distance between points, Ω s2 There are too few points in the model, and the data points of the fitting path are insufficient, resulting in a large error in the fitting cladding path, which eventually leads to unequal spacing of the melting channels and poor cladding effect

Images