Layering Method of Isometric Surface Based on Additive Remanufacturing Point Cloud Model

Abstract

The present invention relates to an equidistant curved surface layering method based on the point cloud model of additive remanufacturing, which includes the following steps: ① Fitting the cylindrical surface: selecting the point cloud of the undamaged area of ​​the shaft part to fit the cylindrical surface, as a standard The model is the standard cylindrical surface; ② Extract the point cloud model of additive remanufacturing: select the point cloud of the defective part, calculate the distance from each point to the standard cylindrical surface as the defect amount e of each point, and follow the principle to extract the data points with serious defects Cloud and its e, as the point cloud model of additive remanufacturing; solve the distance from any point P(x,y,z) of the defective point cloud to the standard cylindrical surface, that is, the defect amount e, and convert it into the point P to the axis L. The difference between the distance and the radius of the cylinder; ③Establish the equidistant surface family of the standard cylindrical surface; ④Construct the contour data P'(x',y',z'), traverse all the points in the additive remanufacturing point cloud, and find out The corresponding contour data is layered, and the equidistant surface layered model diagram of the shaft parts is obtained.

Description

technical field [0001] The invention relates to the technical field of additive remanufacturing engineering, in particular to a layering method based on additive remanufacturing point cloud models. Background technique [0002] At present, additive remanufacturing technology is a general term for a series of advanced technologies used to restore the defect size and service performance of damaged zero (component) parts. The process of restoring the size of damaged zero (component) parts and improving their performance is driven by digital models. A discrete-stacking process characterized by Among them, the discrete process is a slicing and layering process whose object is the 3D model of the defective part. Whether the part model is generated in modeling software or constructed by reverse engineering, it must be layered before it can be input into the additive remanufacturing equipment, so the layering method is a key link in the additive remanufacturing process. The layeri...

AI Technical Summary

Problems solved by technology

The equal layer thickness layering algorithm is simple to implement and fast in program execution, but the step effect is obvious; the adaptive layering algorithm adopts the method of adaptively changing the layer thickness for layering, which effectively reduces the step effect, but cannot completely eliminate the step effect effect; the use of advanced layering algorithms such as hypotenuse layering or surface layering can completely eliminate the step effect, but it is difficult to implement in the system

At the same time, because the above-mentioned layered algorithms are all developed based on the STL model, they must go through the most complex and time-consuming surface reconstruction process in data processing, which leads to the complexity of the calculation process

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