A wind power bearing raceway curvature radius machining error prediction method

By establishing a geometric error propagation model for heavy-duty vertical lathes and using an XD LASER 6D laser interferometer to measure machine tool errors, the problem of error prediction when machining wind turbine bearings with heavy-duty vertical lathes was solved, achieving high-precision machining error reduction and production efficiency improvement.

CN118081476BActive Publication Date: 2026-07-24HARBIN UNIV OF SCI & TECH
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Patent Information

Application Number
CN202410310621.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-03-19
Publication Date
2026-07-24
Estimated Expiration
2044-03-19

AI Technical Summary

Technical Problem

When machining wind turbine bearings on heavy-duty vertical lathes, geometric errors have a significant impact on the machining error of the workpiece, and existing technologies are unable to effectively predict and reduce the machining error.

Method used

A geometric error propagation model for a heavy-duty vertical lathe was established. The geometric error of the machine tool was measured using an XD LASER 6D laser interferometer. The error propagation law was described by rigid body kinematics. The positional error and profile error between points were calculated. The predicted values ​​were verified by a coordinate measuring machine.

Benefits of technology

It provides a theoretical basis for machine tool manufacturers to reduce machine tool assembly and machining errors, thereby improving machining accuracy and efficiency and reducing production costs.

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Abstract

The present application relates to the technical field of machine tool error, and discloses a wind power bearing raceway curvature radius machining error prediction method, comprising the following steps: S1. According to the geometric structure of the heavy vertical lathe, a geometric error transmission model of the heavy vertical lathe is established by using rigid body kinematics, and the error transmission law of the machine tool components is described; S2. The geometric error of the machine tool is measured by using a laser interferometer, and the measurement is carried out by extracting feature points; S3. According to the error model and the transformation matrix, the geometric error is superimposed to obtain the position error of any point, and the position error and the profile error between points are calculated; S4. The actual machined wind power bearing raceway curvature radius is measured by using a three-coordinate measuring instrument, and compared with the predicted value, so as to verify the accuracy of the error prediction method, and the present application can provide theoretical and practical guidance for the design and manufacture of heavy machine tools and the vertical turning process of large rotary parts.
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