Gear wave corrugation order spectrum extraction method based on coordinate system measurement method

Abstract

The application discloses a gear wave corrugation order spectrum extraction method based on a coordinate system measurement method, and belongs to the technical field of gear precision measurement and data processing. The method adopts the coordinate system measurement method to acquire gear one-week tooth profile coordinate points, forms a complete closed profile through segmented splicing and overlapping elimination; based on the closed profile, basic parameters such as tooth number, tooth tip circle, tooth root circle and base circle are autonomously identified, a theoretical involute is established and aligned with the measured tooth profile, and the normal deviation is calculated; through low-order feature separation, high-order features are extracted, Fourier analysis is carried out after being mapped to the gear one-week angle domain, the gear wave corrugation order spectrum is obtained, the main order and the ghost order are identified; meanwhile, the corresponding relationship between the high-order features and the gear number and the gear face side is reserved, and the problem gear face positioning is realized. The application does not need to depend on the development measurement and special analysis software, is suitable for various measuring equipment, can extract the order spectrum and position the abnormal gear face under the condition of fewer sampling points, and significantly improves the detection efficiency and universality.