变速比齿扇加工原理的研究

本文从啮合原理的角度，以循环球式转向器变速比齿扇的加工问题进行了研究，系统分析了变速比传动时的啮合线，啮合面，齿扇齿形与齿廓面等，并对普遍存在的啮合及加工中的干涉问题进行了重点讨论，提出了变速比齿扇的展成加工原理，开发了展成加工装置。

A Study on the Machining of Gear Sector for Steering Gear with Variable Ratio

In this paper, the meshing between the rack on ball nut and the gear sector on arm shaft in recirculating ball steering gear with variable ratio is discussed systematically. And the path of contact, the surface of contact, the flank profile of gear sector, as well as the limitations and interferences associated with gearing and machining are studied separately. In addition, the theory and results are applied to a real example, and a set of technique and device for cutting the flanks of variable ratio gear sector are developed.