Gear shaping machining of face gear

Fellows company has invented the gear shaping processing of face gear as early as 1945. The parameters of the gear shaping cutter are the same as those of the small wheel in the face gear transmission. The gear shaping cutter forms the same production wheel as the small wheel in the axial reciprocating linear motion. Therefore, the small wheel or gear shaping cutter is in a completely conjugate relationship with the face gear in the processing process. Limited by the technical level at that time, the gear shaping precision is low and the hardness is not high, so it can only be used in occasions with low transmission requirements and light load. Since then, the development of face gear transmission has been at a standstill for nearly 50 years.

China has basically mastered the gear shaping technology of face gear. For example, the team led by Zhu Rupeng took the lead in developing face gear shaping machine in 2006, and Deng Xiaozhong and others completed the gear shaping experiment of face gear. The prominent technical significance of the realization of face gear shaper machining lies in: on the one hand, it makes the face gear possible for practical application; On the other hand, Litvin comprehensively discusses the meshing theory of face gear transmission from the perspective of gear shaper, points out that the small wheel has 1 ~ 3 teeth less than the gear shaper cutter, can obtain local point contact, and reveals the undercutting and sharpening conditions of face gear. Based on computer simulation technology, Litvin reveals the meshing characteristics of face gear transmission, such as pointing out that the installation error will not cause linear transmission error, Although it will cause the offset of contact path, it has little impact on the bearing capacity, which has caused people to re recognize the face gear transmission. Similarly, Chinese researchers have conducted in-depth research on the machining interference, tooth surface design and meshing simulation of face gear based on the gear shaping principle.

Due to the maturity of face gear shaping technology in foreign countries, there are few records of gear shaping examples in foreign countries for a long time. However, because the gear shaping principle is highly consistent with the meshing principle of face gear transmission, many theories and methods related to face gear, such as tooth surface definition, modification, gear hobbing, testing and meshing analysis, are based on gear shaping, It can be said that gear shaping is the cornerstone of the follow-up research of face gear.

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