In the parametric design of involute helical cylindrical gear, the meshing motion simulation of helical cylindrical gear and helical surface gear is realized by using the simulation module in Pro / E. According to the characteristics of face gear transmission, a test-bed meeting the requirements of meshing test is designed. The overall design idea of the test-bed and the problems that should be paid attention to in the assembly process are introduced. Through the contact spot detection experiment, the percentage of erythema area on the measured tooth surface is observed, and the accuracy of face gear is obtained. By analyzing the results of contact spot detection experiment, the differences between the face gear machined by actual hobbing and the theoretical model are found out, and the solution is provided. Through the hobbing processing of opposite gear and the analysis of meshing experimental results, it provides a reference basis for hobbing helical gear on ordinary hobbing machine in the future.
Through the in-depth study on the hobbing processing of helical gear, the following conclusions are drawn:
(1) The tooth surface equation of helical gear is deduced, the data lattice on the tooth surface is solved by numerical calculation method, and the solid modeling of helical gear is completed in Pro / E.
(2) The parametric modeling of hob is completed by using the secondary development tool program in Pro / E. Through the hobbing motion simulation of helical gear, the interference problems in the hobbing process are found, the interference is analyzed, and the effective length of hob is determined.
(3) The hobbing processing of helical gear is studied. It is different from the processing of helical cylindrical gear. By adjusting the relevant parameters of the machine tool, the hobbing processing of helical gear on ordinary hobbing machine is realized.
(4) The design and construction of the test-bed are completed. Through the contact spot detection experiment, the problems existing in the machining process of helical gear are found out, and the corresponding solutions are put forward, which puts forward some suggestions for hobbing helical gear on ordinary hobbing machine.
Because the hobbing processing of helical gear is still in the exploratory stage, the research content is not comprehensive enough, and further research can be carried out in the following aspects: due to the differences between the actual machined face gear and the theoretical model, the special hob is designed and its modification is analyzed to reduce the differences between them.