The end face spiral gear coupling (also known as circular arc end gear) was invented by Gleason company. Relying on the end face spiral tooth centering and torsion transmission, it has many advantages, such as reliable positioning, high centering accuracy, strong bearing capacity, compact structure and light weight. At the same time, it is easy to assemble and disassemble, and has interchangeability. Repeated loading and disassembly will not affect the original accuracy. The end face spiral gear coupling is mainly used for the connection between compressor disk and turbine disk, as well as the connection between wheel disc or gear and shaft, such as the connection between rb199 engine high pressure compressor disc and high pressure shaft, the connection between ahye engine turbine rotor, and SBY, mk202, rb211, ej200, Trent Series, rtm322, adour, etc. The structure design and processing technology of end face spiral gear coupling has become the key technology of aero-gas turbine engine rotor structure design, and its related research content has gradually become the focus of attention of scholars at home and abroad.
In the research of end face spiral gear coupling, domestic and foreign scholars have mainly carried out a series of research on its structural strength and structural design. Yuan According to the machining principle of the end face spiral gear coupling, Huang FA studied the detailed design method of the chamfering of the tooth top and the mountain bottom according to the processing principle of the end face spiral gear coupling; Li Aimin et al.  aimed at the fatigue life of the tooth root of the end face spiral gear coupling and the need to improve the interference between the tooth root and the tooth top, Huang FA studied the detailed design method of the local structure such as the tooth top chamfer and the mountain bottom of the end face spiral gear coupling Based on the design method proposed by Gleason company, Chen Long et al. Proposed some local innovative designs and modified the local structure of the end face spiral gear coupling. In the research of machining and testing technology, Yu Qijun and others studied the grinding parameters and contact area detection method of end face spiral gear coupling. However, the domestic experts still use the non contact surface technology to realize the low precision of the end face. Domestic and foreign scholars have made many attempts in the meshing detection technology of end face spiral gear coupling, but in practical engineering application, due to the limitation of efficiency and cost, other methods are difficult to replace the coloring detection method. Although the machining quality of the end face spiral gear coupling can be directly determined according to the coloring style, it is difficult to identify the root of the problem according to the coloring style when the coloring style is unqualified, which makes it difficult to adjust the process parameters.
In the actual machining process, the thermal deformation, elastic deformation, axis motion error, fixture error and other factors lead to the inevitable tooth profile error. Due to the existence of tooth profile error, it is necessary for machine operators to adjust machine parameters according to their experience, and the process is extremely cumbersome. In addition, in order to check the manufacturing accuracy of the workpiece, it is necessary to manufacture high-precision gauges (original gauges, proofreading gauges and Inspection Gauges), which have high manufacturing cost, cumbersome detection and low efficiency. With the continuous development of mechanical manufacturing technology, computer technology and measurement technology, the traditional gear processing technology has been unable to meet the requirements of modern gear transmission, and the tooth profile error correction technology based on gear measurement center has become an important means to control the accuracy of tooth surface and meshing quality. In the United States, Japan, Germany and other countries, the digital closed-loop manufacturing of gear processing has replaced the traditional manufacturing mode, and the digital detection of tooth surface and tooth profile error correction technology has become an indispensable important link in the manufacturing process. At present, the research on digital closed-loop manufacturing of end face spiral gear coupling has not been reported.