Abstract

The closed keyseat on the shaft is an important surface of the shaft, which requires high precision keyseat depth and symmetry. But the closed keyseat on shaft is usually finished by V-block positioning milling on general purpose milling machine or NC machine tool with difficult to meet high precision requirements, especially the high precision inspection. Based on the analysis of the general inspection methods of keyseat depth and symmetry, this paper proposes and uses the parallel beam of grating principle, oblique irradiation, narrow slit scanning and intelligent algorithm. The relevant data are measured online and the error norm is used to determine whether the keyseat is qualified or not, and the rapid inspection of 0.1 micron level is realized, providing technical support for the intelligent manufacturing of components with keyseat.

Keywords: Grating principle; Closed keyseat; Symmetry detection; Parallel beam of light; Error norm