Structure Design And Analysis Of CNC Spherical Gear Grinding Machine

Spherical gear pair is a new type of mechanism which can transfer 2-DOF motion, then has good motion flexibility and wide application future. It can be used for flexible wrist mechanism of robot, underwater vector propulsion propeller, traveling stage with complex function of wheel and leg, microwave antenna's attitude aiming at satellite, and entire orientation joint of bionic machinery so on.To make spherical gear be used really in engineering practice, we must solve its machining problem. At present, rough milling of spherical gear can be carried out easily; we starve for method and equipment of precise grinding spherical gear. But existing machine tool can not fill the grinding demand of spherical gear. This dissertation introduces the process to design and analyze a CNC spherical gear grinding machine. Main research subjects are included as follow:1. Mold grinding project has been adopted after researching the grinding principle of spherical gear. Based on the grinding demand of spherical gear, the article has confirmed the main parameter of CNC spherical gear grinding machine. Various vertical, horizontal and inclining general layout projects have been designed, analyzed and compared, and then this article has chosen an excellent project and made the simulation of grinding principle.2. The dissertation has designed or made sure the type of lathe bed, principal axis, servo electromotor, rolling slide-way, ball screw and NC worktable so on. The calculation formula of accurate profile curve of finger grinding wheel has been gotten and its calculation program has been made.3. The static and dynamic characteristic of sliding seat has been analyzed with the idea of finite element analysis, and then amelioration project of structure size has been put forward. The modal of the body section has been analyzed, and the front six natural frequency and the modal shapes have been obtained.4. The grinding process has been researched according to the characteristic of finger wheel grinding spherical gear. The process parameters have been made sure, such as grinding teeth allowance and grinding depth. How to produce the Tooth profile error in the process of grinding spherical gear has been analyzed.