A method for self-positioning of machining reference of an additively repaired bearing bush

By using visual measurement equipment and point cloud data processing, the machining datum and axis of the bearing bush are automatically determined, solving the problems of low efficiency and low precision in traditional methods, and realizing the automation and precision improvement of bearing bush machining.

CN118268897BActive Publication Date: 2026-06-02CHINA YANGTZE POWER +1
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Patent Information

Application Number
CN202410300807.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-03-15
Publication Date
2026-06-02
Estimated Expiration
2044-03-15

AI Technical Summary

Technical Problem

Traditional methods for determining the machining datum of bearing bushes rely on manual adjustments, resulting in low processing efficiency and low precision. Furthermore, subtractive machining relies on manual scraping of the bearing bushes, which requires high skill levels and is difficult to promote.

Method used

Visual measurement equipment is used to scan point clouds. Through point cloud data preprocessing, registration and feature point extraction, the machining datum and axis of the bearing are automatically determined. Combined with curve fitting and compensation logic, the position of the machining equipment is adjusted to achieve automated subtractive machining.

Benefits of technology

It enables automatic positioning of the bearing machining reference, improves machining efficiency and accuracy, reduces reliance on the skills of construction personnel, and enhances the automation level of machining equipment.

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Abstract

A kind of machining datum self-positioning method of additive repair bearing bush, comprising the following steps: S1. obtaining point cloud data of bearing bush surface;S2. preprocessing point cloud data;S3. point cloud registration aligns bearing bush surface with point cloud model;S4. after surface reconstruction, obtain feature points of bearing bush surface;S5. based on point cloud data, accurately extract feature points, and then calculate the geometric center of bearing bush;S6. determine the machining axis of bearing bush by curve fitting algorithm;S7. real-time acquisition of bearing bush positioning data determines machining datum and axis parameters, and automatically adjusts the position and parameters of machining equipment through compensation logic and three-dimensional reconstruction algorithm, so that the machining equipment matches the actual shape and position of bearing bush, so that the bearing bush is placed on the machining platform, the computer can automatically identify and determine the machining datum, axis and other parameters, and the position of machining equipment can be adjusted in real time through compensation method to match the bearing bush, improve the machining efficiency and machining precision, and have good practical value and economic value.
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